{"id":806,"date":"2026-06-15T07:47:46","date_gmt":"2026-06-15T07:47:46","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=806"},"modified":"2026-06-15T07:47:46","modified_gmt":"2026-06-15T07:47:46","slug":"ep-se400t1-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ja\/product\/ep-se400t1-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE400T1 Track Drive Planetary Gearbox"},"content":{"rendered":"

<\/main><\/p>\n
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EP-SE400T1 Series \u2014 Single-Stage Track Drive Planetary Gearbox<\/h2>\n
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\"EP-SE400T1<\/p>\n

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1,300 N\u00b7m<\/div>\n
\u5b9a\u683c\u51fa\u529b\u30c8\u30eb\u30af<\/div>\n<\/div>\n
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>96%<\/div>\n
\u52b9\u7387<\/div>\n<\/div>\n
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i = 6.09<\/div>\n
Single stage ratio<\/div>\n<\/div>\n
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130 N\u00b7m<\/div>\n
Spring brake torque<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power Track Drive Series<\/span><\/a><\/div>\n<\/div>\n
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\u306e EP-SE400T1<\/strong> is a single-stage track drive planetary gearbox for crawler undercarriages, rotary drilling rigs, mobile crushing plants, and tracked agricultural machinery. At a fixed ratio of i=6.09, it accepts up to 1,000 rpm from an axial-piston or orbit hydraulic motor and delivers 1,300 N\u00b7m of output torque through the rotating outer housing directly to the sprocket \u2014 sufficient to propel a 3\u20135 tonne crawler on a 20\u00b0 gradient using two drives, one per track. The integrated multi-disc spring brake holds 130 N\u00b7m without any hydraulic pressure, locking the machine automatically the instant the operator releases the travel control.<\/p>\n

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\ud83d\udd04 Rotating Outer Housing<\/div>\n
Ring gear = outer housing = sprocket drive. Zero-protrusion compact profile within track frame width.<\/div>\n<\/div>\n
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\ud83d\uded1 Spring-Applied Brake<\/div>\n
Normally closed \u2014 brake ON without hydraulic pressure. Power loss = automatic hold. 130 N\u00b7m braking.<\/div>\n<\/div>\n
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\ud83d\udd12 Floating Face Seals<\/div>\n
Lapped-flat metal rings, spring-loaded. Impervious to deep mud, abrasive sand, high-pressure wash.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Complete Technical Specifications<\/h2>\n

\u2460 Core Performance Parameters<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\nSpecification \/ Value<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n1,300 N\u00b7m<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n6.09 \u2014 Single Stage<\/td>\n<\/tr>\n
Max Input Speed<\/td>\n1,000 rpm (rated continuous)<\/td>\n<\/tr>\n
Integral Brake Torque (spring-applied)<\/td>\n130 N\u00b7m<\/td>\n<\/tr>\n
Efficiency (at rated torque)<\/td>\n> 96%<\/td>\n<\/tr>\n
Mounting Type<\/td>\nRotating outer housing flange \u2014 direct sprocket mount<\/td>\n<\/tr>\n
Approximate Weight<\/td>\n~35 kg (varies slightly by motor adapter configuration)<\/td>\n<\/tr>\n
Lubrication System<\/td>\nOil bath splash lubrication \u2014 API GL-5 equivalent gear oil<\/td>\n<\/tr>\n
Recommended Oil Viscosity<\/td>\nISO VG 150 (below +15\u00b0C ambient) \u2014 ISO VG 220 (above +15\u00b0C)<\/td>\n<\/tr>\n
First Oil Change Interval<\/td>\n150 operating hours (run-in); every 1,000 hours thereafter<\/td>\n<\/tr>\n
\u52d5\u4f5c\u6e29\u5ea6\u7bc4\u56f2<\/td>\n\u221220\u00b0C to +90\u00b0C (housing surface)<\/td>\n<\/tr>\n
Seal Type (drum\u2013spindle interface)<\/td>\nFloating metal-to-metal mechanical face seals (duo-cone type)<\/td>\n<\/tr>\n
Applicable Hydraulic Motor Interface<\/td>\nAxial piston motors; hydraulic orbit (gerotor) motors \u2014 e.g. A2FE63<\/td>\n<\/tr>\n
Brake Release Method<\/td>\nHydraulic pilot pressure (spring-applied, hydraulically released)<\/td>\n<\/tr>\n
Optional Valve Integration<\/td>\nPressure relief valve; overcenter (counterbalance) valve \u2014 specify at order<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2461 EP-SE400T1 vs Substandard Market Alternatives \u2014 Key Differentiators<\/h3>\n
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Component \/ Aspect<\/th>\nKorea Ever-Power EP-SE400T1<\/th>\nTypical Low-Cost Alternatives<\/th>\n<\/tr>\n<\/thead>\n
Gear Metallurgy<\/td>\nHigh-alloy steel, precision carburised and quenched \u2014 deep case hardness for anti-pitting under shock loads<\/td>\nStandard carbon steel, shallow induction hardening \u2014 tooth shear risk under impact loads<\/td>\n<\/tr>\n
Sealing System<\/td>\nLifetime floating mechanical face seals \u2014 impervious to deep mud, abrasive sand, pressure washing<\/td>\nStandard rubber lip seals \u2014 rapid abrasive degradation in soil, oil loss, gear contamination<\/td>\n<\/tr>\n
Bearing Selection<\/td>\nOversized taper roller bearings configured for simultaneous high axial and radial loads from ring gear forces<\/td>\nUndersized standard ball bearings \u2014 cage collapse under machine static weight loading<\/td>\n<\/tr>\n
Brake System<\/td>\nWet multi-disc \u2014 130 N\u00b7m holding, fade-resistant oil-cooled discs, consistent engagement force<\/td>\nDry friction pads or poorly toleranced discs \u2014 brake drag, overheating, reduced holding torque over time<\/td>\n<\/tr>\n
Dimensional Accuracy<\/td>\nStrict 1:1 geometric match to Rexroth GFT \/ Bonfiglioli 700C equivalents \u2014 true plug-and-play<\/td>\nInconsistent flange tolerances requiring field machining, adapter plates, or hydraulic line rerouting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2462 Selection Guide \u2014 Confirming EP-SE400T1 Fits Your Application<\/h3>\n
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Selection Parameter<\/th>\nEP-SE400T1 Capability<\/th>\nHow to Verify for Your Machine<\/th>\n<\/tr>\n<\/thead>\n
Max output torque required per drive<\/td>\n\u2264 1,300 N\u00b7m<\/td>\nCalculate: (machine weight \u00d7 gradient force \u00d7 track radius) \u00f7 2 drives. Apply 1.5\u00d7 safety factor for shock loads.<\/td>\n<\/tr>\n
Hydraulic motor output speed<\/td>\n\u2264 1,000 rpm continuous<\/td>\nCheck pump flow rate and motor displacement. Ensure max pump flow does not exceed 1,000 rpm at motor output under load.<\/td>\n<\/tr>\n
Track frame inner diameter \/ width<\/td>\nMatches short-profile standard track frames<\/td>\nRequest Korea Ever-Power dimensional drawing. Confirm rotating drum OD and spindle pilot dimensions match chassis bore.<\/td>\n<\/tr>\n
Parking brake holding requirement<\/td>\n130 N\u00b7m static brake<\/td>\nCalculate: machine gross weight \u00d7 sin(steepest parking angle) \u00d7 track radius \u00f7 2 drives. Must be \u2264 130 N\u00b7m.<\/td>\n<\/tr>\n
Replacement fit for existing drive<\/td>\nRexroth GFT-equivalent \/ Bonfiglioli 700C-equivalent<\/td>\nConfirm existing model’s flange bolt circle, spigot OD, motor interface dimensions. Korea Ever-Power cross-reference service at no charge.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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Six Design Features That Separate a Track Drive Planetary Gearbox from Every Precision Servo Reducer<\/h2>\n

\"track<\/p>\n

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\u2460 Inverted Planetary Architecture \u2014 Ring Gear Is the Output<\/div>\n

In every EP precision series (TM, TNF, TEG), the ring gear is bolted stationary to the housing and the planet carrier rotates as the output shaft. EP-SE400T1 reverses this: the hollow central spindle (planet carrier) bolts to the machine chassis and remains fixed; the ring gear, cast as an integral part of the outer rotating drum, spins as the output. This lets the gearbox body itself become the sprocket hub. The track chain sprocket bolts to the outer drum face, and the entire assembly sits within the track frame width with no shaft protruding beyond the sprocket plane \u2014 a package geometry impossible to achieve with a conventional shaft-output gearbox.<\/p>\n<\/div>\n

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\u2461 Spring-Applied \/ Hydraulically-Released Multi-Disc Brake<\/div>\n

The integrated brake operates on a fail-safe principle that is the opposite of every friction brake in common use: heavy internal Belleville springs permanently clamp a stack of alternating steel and friction discs against the rotating drum, holding 130 N\u00b7m of braking torque without any hydraulic pressure. Travel requires the operator to deliberately apply pilot pressure to a dedicated brake port \u2014 this hydraulic pressure compresses the spring stack and lifts the disc pack, allowing the drum to rotate. The moment the machine shuts down, hydraulic pressure drops to zero and the spring brake re-engages automatically. A machine parked on a slope cannot roll even on total hydraulic system failure.<\/p>\n<\/div>\n

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\u2462 Floating Mechanical Face Seals \u2014 Not Lip Seals<\/div>\n

The sealing system at the rotating drum\u2013spindle interface uses floating mechanical face seals (sometimes called duo-cone seals or rotating lip metal seals in industry literature). Each seal pair consists of two hardened and lapped-flat metal toric rings pressed together by toroidal elastomer O-rings acting as springs. The sealing action is metal-to-metal contact across lapped surfaces, not elastomer-to-shaft sliding contact. Lapped metal faces do not wear or stiffen with temperature. Abrasive soil particles that cut through rubber lip seals in days cannot penetrate the pressurised metal interface. This is the standard sealing system on excavator final drives worldwide because it is the only design that survives continuous immersion in rock-mud slurry.<\/p>\n<\/div>\n

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\u2463 Oil Bath Splash Lubrication \u2014 API GL-5 Gear Oil<\/div>\n

The EP precision series uses sealed-for-life synthetic grease lubrication inside a closed housing \u2014 no oil fill or drain ports. EP-SE400T1 uses oil bath splash lubrication: a fill of API GL-5 rated gear oil (ISO VG 150\u2013220 depending on ambient temperature) partially submerges the gear train. As the planet gears orbit, they pick up oil and distribute it across all tooth surfaces and bearings. The first oil change is at 150 operating hours (run-in metal particle clearance), then every 1,000 hours. Oil fill, level check, and drain ports are positioned to be accessible without removing the gearbox from the machine \u2014 a maintenance design priority absent from sealed-for-life precision gearboxes.<\/p>\n<\/div>\n

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\u2464 Direct Hydraulic Motor Plug-In \u2014 A2FE63 and Equivalent<\/div>\n

The EP-SE400T1 input is designed for splined shaft plug-in connection to axial piston hydraulic motors (such as the A2FE63 series) or hydraulic orbit motors (gerotors). The motor’s output shaft inserts directly into the sun gear bore; the motor face bolts to the gearbox input flange. There is no coupling, no adapter sleeve, and no key \u2014 the spline transmits torque over full tooth length contact area. Optional integrated pressure relief valves and overcenter valves (specified at order) simplify the hydraulic circuit by eliminating external cartridge valves that would otherwise sit in the motor case drain line. The 1,000 rpm max input limit applies to the rated continuous duty; the motor displacement should be selected to reach max travel speed within this limit at the system’s maximum pump flow rate.<\/p>\n<\/div>\n

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\u2465 Dimensional Interchangeability \u2014 Rexroth GFT \/ Bonfiglioli 700C<\/div>\n

The EP-SE400T1 mounting flange bolt circle, spigot diameters, center bore dimensions, and hydraulic port locations match the equivalent size models in the Rexroth GFT track drive series and the Bonfiglioli 700C crawler drive series (cited for dimensional reference only \u2014 Korea Ever-Power claims no trademark affiliation). This dimensional parity means a machine currently running a legacy drive in this torque class can be re-fitted with EP-SE400T1 without modifying the chassis, hydraulic lines, brake pilot circuit, or sprocket hub hardware. Field replacement requires only a drain of the old oil and a refill with GL-5 grade oil before commissioning. Brand disclaimer: Rexroth and Bonfiglioli are trademarks of their respective owners, cited solely for dimensional reference.<\/em><\/p>\n<\/div>\n<\/div>\n

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How a Track Drive Planetary Gearbox Works \u2014 From Hydraulic Motor to Moving Track<\/h2>\n
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The EP-SE400T1 track drive planetary gearbox operates through a four-stage power chain, each stage a distinct form of energy conversion. Understanding the sequence clarifies why each design feature exists.<\/p>\n

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Stage 1 \u2014 Hydraulic to Rotary: Motor Input<\/strong><\/p>\n

Pressurised hydraulic fluid from the machine’s main pump enters the axial piston motor (e.g. A2FE63). The fluid forces the pistons across the cylinder barrel’s swash plate; the barrel rotates at up to 1,000 rpm. Simultaneously, a separate pilot pressure signal (typically 25\u201335 bar) enters the gearbox brake port \u2014 this pressure compresses the Belleville spring stack against a piston, separating the friction disc pack and releasing the brake. The motor shaft spline engages directly with the sun gear bore.<\/p>\n<\/div>\n

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Stage 2 \u2014 Speed Reduction: Planetary Gear Set<\/strong><\/p>\n

The sun gear, spinning at motor speed (\u22641,000 rpm), meshes with three or more planet gears carried in the stationary planet carrier (fixed to the spindle, hence to the machine chassis). Because the carrier cannot rotate, the planet gears are forced to roll around the inside of the ring gear. This epicyclic rolling action produces output rotation of the ring gear at exactly 1\/6.09 of the input speed \u2014 164 rpm at maximum motor speed. At 1,000 rpm input and 1,300 N\u00b7m output, the theoretical power is approximately 22 kW before friction losses.<\/p>\n<\/div>\n

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Stage 3 \u2014 Torque Transfer: Rotating Outer Housing<\/strong><\/p>\n

The ring gear, cast integrally with the outer drum housing, transfers its rotational torque directly to the sprocket bolted to the drum face. There is no output shaft, no coupling, and no additional connection. The drum is the output. The mechanical face seals at the drum-spindle interface ensure that oil inside the gearbox does not escape into the track chain even as the drum rotates continuously against the fixed spindle. The taper roller bearings at the drum-spindle junction carry the full weight of the machine side load transmitted through the track and sprocket.<\/p>\n<\/div>\n

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Stage 4 \u2014 Brake Engagement: Hydraulic Pressure Loss<\/strong><\/p>\n

When the operator releases the travel control, pump pressure drops, motor rotation stops, and \u2014 crucially \u2014 the pilot brake pressure also drops to zero. The Belleville spring stack immediately extends, pushing the friction discs together against the drum. The 130 N\u00b7m of spring-generated braking torque locks the output drum within milliseconds of pressure release. The machine stops and holds position on any incline within the static brake’s capacity without requiring any electrical or mechanical brake actuator input from the operator or the control system.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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EP-SE400T1 ENERGY FLOW<\/p>\n

Hydraulic pump
\n\u2193 high pressure oil
\nA2FE63 axial piston motor
\n\u2193 rotary shaft \u22641,000 rpm
\nSun gear (input)
\n\u2193 epicyclic i=6.09
\nRing gear (output drum)
\n\u2193 \u2264164 rpm \/ 1,300 N\u00b7m
\nSprocket \u2192 crawler trackBRAKE PATH<\/span>
\nPilot pressure present \u2192
\nspring compressed \u2192 free
\nPilot pressure lost \u2192
\nspring extends \u2192 130 N\u00b7m lock<\/div>\n
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LUBRICATION CIRCUIT<\/p>\n

Oil bath \u2014 GL-5 gear oil fills lower housing. Planet orbit splashes oil to all mesh points and bearings. No pump, no filter \u2014 gravity and centrifugal distribution only.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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How to Select the Right Track Drive Planetary Gearbox \u2014 Four Parameters That Cannot Be Guessed<\/h2>\n

Specifying a track drive planetary gearbox is not the same exercise as specifying a precision servo reducer. There is no backlash figure to compare, no arcminute spec to match. The four parameters below determine whether a track drive works \u2014 or fails within the first season of use. Get any one of them wrong and the gearbox will not make it to its first oil change.<\/p>\n

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\u2460 Required Output Torque \u2014 The Number You Calculate, Not Estimate<\/div>\n
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The tractive force a crawler machine must develop is a function of its gross operating weight, the steepest gradient it must climb, and the track-ground friction coefficient. The drive torque per track is: T = W \u00d7 (sin\u03b8 + f\u00b7cos\u03b8) \u00d7 r \u00f7 2<\/code> where W = total weight (N), \u03b8 = max gradient angle, f = rolling resistance coefficient (0.10\u20130.15 for firm ground, 0.20\u20130.30 for soft\/wet soil), r = sprocket pitch radius (m). Apply a dynamic shock factor of 1.5\u20132.0 for machines traversing abrupt terrain transitions or rock surfaces. EP-SE400T1 rated at 1,300 N\u00b7m is appropriate for machines in the 3\u20135 tonne class on gradients up to 30\u00b0.<\/p>\n

EP-SE400T1 max continuous: 1,300 N\u00b7m<\/strong> \u00b7 Peak (3 sec): ~2,600 N\u00b7m<\/strong><\/div>\n<\/div>\n<\/div>\n
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\u2461 Hydraulic Motor Speed \u2014 Match Pump Flow to the 1,000 rpm Limit<\/div>\n
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The EP-SE400T1 accepts up to 1,000 rpm continuous at the input. Your hydraulic motor’s speed at maximum pump flow is: n = Q \u00d7 1000 \u00f7 (V \u00d7 \u03b7_v)<\/code> where Q = pump flow (L\/min), V = motor displacement (cc\/rev), \u03b7_v = volumetric efficiency (~0.95). For a common pump delivering 40 L\/min, a motor displacement of \u226544 cc\/rev keeps the motor below 1,000 rpm. Using a smaller motor (e.g. 28 cc\/rev) at this flow would push the motor to 1,540 rpm \u2014 above the rated input limit. This is one of the most common selection errors: choosing a motor for torque without checking if the pump’s flow rate drives it over speed.<\/p>\n

Max continuous input: 1,000 rpm<\/strong> \u00b7 Select motor displacement accordingly<\/div>\n<\/div>\n<\/div>\n
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\u2462 Parking Brake Adequacy \u2014 The Slope Calculation That Keeps Machines from Rolling<\/div>\n
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The EP-SE400T1 integral spring brake provides 130 N\u00b7m of holding torque per drive. The two-drive brake torque holding capacity (260 N\u00b7m total at output, before sprocket and track leverage) must exceed the gravity-induced rolling torque on the steepest parking slope: T_roll = W \u00d7 sin \u03b8_park \u00d7 r<\/code>. At a 15\u00b0 parking slope with a 3,500 kg machine and 180 mm sprocket radius: T_roll per drive = (34,335 \u00d7 sin15\u00b0 \u00d7 0.18) \u00f7 2 = 800 N\u00b7m. The 130 N\u00b7m spring brake acting before the i=6.09 reduction provides 130 \u00d7 6.09 = 792 N\u00b7m of wheel-equivalent braking \u2014 close to the limit, confirming that 15\u00b0 is approximately the safe parking slope for a 3.5 tonne machine with EP-SE400T1 brakes.<\/p>\n

Spring brake: 130 N\u00b7m<\/strong> \u00b7 Effective output hold: ~792 N\u00b7m at sprocket<\/strong><\/div>\n<\/div>\n<\/div>\n
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\u2463 Operating Environment \u2014 Seal System and Oil Grade Selection<\/div>\n
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The EP-SE400T1 floating mechanical face seals handle all standard tracked-machine environments: rock quarry dust, wet clay, paddy field water, concrete slurry, and soft soil. For extremely abrasive environments (granite quarry, hard-rock mining), verify that the face seal specification matches the material hardness class \u2014 contact Korea Ever-Power for material confirmation. Oil grade selection by temperature: ISO VG 150 for cold climates (consistent viscosity below +15\u00b0C ambient), ISO VG 220 for tropical\/hot climates (prevents viscosity breakdown above +40\u00b0C ambient). Do not mix grades. At \u221220\u00b0C, the VG 150 oil requires no pre-warm before travel in standard configurations.<\/p>\n

Std. seals: dust, mud, water wading \u00b7 Oil: VG150 (<+15\u00b0C) or VG220 (>+15\u00b0C)<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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QUICK SELECTION CHECKLIST \u2014 EP-SE400T1<\/p>\n

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\u2610 Calculated drive torque \u2264 1,300 N\u00b7m<\/div>\n
\u2610 Motor speed at max pump flow \u2264 1,000 rpm<\/div>\n
\u2610 Spring brake adequate for steepest parking slope<\/div>\n
\u2610 Spindle bore and drum OD match chassis<\/div>\n
\u2610 Motor interface: A2FE63 or equivalent confirmed<\/div>\n
\u2610 Brake pilot pressure line available (25\u201335 bar)<\/div>\n
\u2610 Oil grade selected for ambient temperature range<\/div>\n
\u2610 Korea Ever-Power cross-reference drawing confirmed<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Track Drive Planetary Gearbox Installation & First Commissioning \u2014 Field-Verified Sequence<\/h2>\n

The sequence below is based on field installation experience across tracked construction, agricultural, and mining equipment. Skipping any step is a common cause of early seal failure or brake malfunction \u2014 both of which are installation damage, not manufacturing defects.<\/p>\n

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Step 1 \u2014 Verify Chassis Spindle Bore Before Fitting<\/div>\n

Measure the chassis spindle bore diameter and check it against the EP-SE400T1 spindle OD on the Korea Ever-Power dimensional drawing. Tolerance mismatch here causes fretting and spindle micro-movement under load, which rapidly destroys the mechanical face seal at the drum-spindle interface. Clean all burrs, rust, and paint from the bore mating surfaces.<\/p>\n<\/div>\n

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Step 2 \u2014 Install Gearbox with Correct Orientation for Oil Level<\/div>\n

The oil fill and level ports are orientation-specific \u2014 they are positioned for the gearbox’s operating attitude (typically spindle axis horizontal). If your machine installation places the spindle at a non-standard angle (e.g. tilted on a slope-walking machine), confirm the oil port orientation with Korea Ever-Power before installation. Installing with ports in the wrong position can result in operating under- or over-oiled from day one.<\/p>\n<\/div>\n

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Step 3 \u2014 Fill Oil Before Attaching Hydraulic Motor<\/div>\n

Fill the gearbox to the correct level with API GL-5 gear oil (ISO VG 150 or VG 220) through the fill port before the hydraulic motor is attached. This is easier with clear access to the fill port. Use a filtered funnel. Volume: approximately 0.8\u20131.2 litres. Check level at the side port \u2014 oil should just reach the bottom of the opening with gearbox in operating position.<\/p>\n<\/div>\n

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Step 4 \u2014 Connect Hydraulic Motor and Torque Fasteners<\/div>\n

Insert the motor output shaft spline into the sun gear bore \u2014 do not force. Confirm full spline engagement before bolting the motor face. Torque all motor fasteners to the motor manufacturer’s specification in a cross (star) pattern. A partially engaged spline transmits torque over a reduced tooth length, generating concentrated stress that shears spline teeth under load.<\/p>\n<\/div>\n

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Step 5 \u2014 Connect and Test Brake Pilot Circuit First<\/div>\n

Before connecting the travel motor work ports, connect only the brake pilot line and apply pressure (25\u201335 bar). Confirm the drum rotates freely by hand \u2014 this verifies the brake has released. Release the pilot pressure and confirm the drum locks. A brake that does not fully release prevents travel; a brake that does not lock on pressure loss is a safety failure. Do not proceed to travel testing until this two-state test is passed.<\/p>\n<\/div>\n

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Step 6 \u2014 Run-In at Low Load, Drain Oil at 150 Hours<\/div>\n

Operate at 50% maximum load for the first 10 hours. During run-in, gear surfaces micro-seat and fine metal particles enter the oil. At 150 operating hours, drain the oil while warm (particles stay suspended), refill with fresh GL-5 oil of the same grade. This first oil change is not optional \u2014 it is the primary protection against abrasive particle recirculation through the bearing and gear train. Thereafter, drain and fill every 1,000 hours or annually.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"track<\/p>\n

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Track Drive Planetary Gearbox Applications \u2014 Six Industries Where EP-SE400T1 Carries the Load<\/h2>\n
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\u2460 Crawler Undercarriage \u2014 Small to Mid-Size Excavators<\/h3>\n

This track drive planetary gearbox at 1,300 N\u00b7m rated output covers the travel drive requirement for mini and compact excavator classes (approximately 3\u20136 tonnes operating weight on 20\u00b0 gradient). Each machine uses two EP-SE400T1 units, one per track, independently controlled by separate motor flow. Speed differential between the two drives steers the machine \u2014 forward flow to both drives for straight travel, differential flow for turning, reversed flow to one drive for pivot steering. The rotating outer housing design keeps the total drive assembly within the track frame width with no axial protrusion beyond the sprocket plane.<\/p>\n<\/div>\n

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\u2461 Rotary Drilling Equipment \u2014 Site Positioning Drive<\/h3>\n

Tracked rotary drilling rigs position themselves slowly and precisely across construction sites between bore locations. The travel drive does not need high speed \u2014 drilling rigs rarely exceed 2 km\/h repositioning speed \u2014 but must handle the full machine weight (often 8\u201312 tonnes for the rig chassis alone) on uneven surface. EP-SE400T1 at i=6.09 provides adequate torque for this weight class in the motor speed range achievable at low pump flow (200\u2013400 rpm output), moving the rig at controlled walking pace without requiring separate travel speed control valves beyond motor displacement adjustment.<\/p>\n<\/div>\n

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\u2462 Mobile Crushing and Screening \u2014 On-Site Repositioning<\/h3>\n

Tracked mobile crushing and screening plants are among the harshest environments for track drives: the machines vibrate continuously at high amplitude from the crusher and screen, the ground surface is fragmented rock, and repositioning movements often cross deep piles of crushed aggregate. The spring-applied brake on EP-SE400T1 holds the machine stationary between movements \u2014 the brake engages as soon as the operator releases the travel control, preventing the machine from sliding on aggregate slopes during the frequent brief repositioning moves that characterise quarry operation.<\/p>\n<\/div>\n

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\u2463 Foundation Piling Machines \u2014 Precision Slow Travel<\/h3>\n

Piling rigs require precise positioning of the lead and pile guide at each bore location \u2014 travel moves of 1\u20133 metres, accurate to within \u00b120 mm. The EP-SE400T1’s fixed ratio i=6.09 converts motor speed linearly to travel speed, making closed-loop positional control of machine travel straightforward with a standard electrohydraulic proportional valve in the motor circuit. The mechanical face seals handle the concrete dust and slurry that piling operations generate, which rapidly destroys the lip seals used in lighter-duty track drives.<\/p>\n<\/div>\n

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\u2464 Tracked Agricultural Machinery \u2014 Wet Field Operation<\/h3>\n

Tracked combine harvesters and large tracked tractors operating in wet rice paddies, saturated peat soils, and heavy clay fields use EP-SE400T1 or equivalent drives because the distributed track footprint minimises soil compaction compared to equivalent wheeled machines. The mechanical face seals operate indefinitely in the standing water and mud that characterise paddy field harvest conditions. Downstream agricultural multi-output gearboxes<\/a> distribute the engine power to the cutting platform, threshing drum, grain elevator, and fan \u2014 entirely separate from the EP-SE400T1 track propulsion circuit \u2014 allowing the implement drive to be optimised independently of ground speed.<\/p>\n<\/div>\n

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\u2465 Tracked Pipe-Laying and Trenching Equipment<\/h3>\n

Pipe-laying machines and chain trenchers require the track drive to pull the machine forward at precisely controlled slow speed (0.1\u20131.5 km\/h) while the trenching attachment excavates a continuous cut. The EP-SE400T1’s efficiency of >96% is relevant here: the travel power is a significant continuous load component in addition to the trenching load on the hydraulic system. A \u30a6\u30a9\u30fc\u30e0\u30ae\u30a2\u6e1b\u901f\u6a5f<\/a> on the winch drum of a pipe-laying frame provides the self-locking load hold for the pipe tensioner and cable drum drives alongside the EP-SE400T1 travel system on the same machine platform.<\/p>\n<\/div>\n<\/div>\n

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\"track<\/p>\n

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Why Equipment Builders Specify Korea Ever-Power Track Drive Planetary Gearboxes Over Generic Alternatives<\/h2>\n

\"Testing<\/p>\n

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Dimensional Drawing Same Day \u2014 Cross-Reference Included<\/h3>\n

Every EP-SE400T1 \u904a\u661f\u30ae\u30a2\u30dc\u30c3\u30af\u30b9<\/a> quotation includes a full dimensional drawing and confirmation of fit against the legacy drive being replaced. If the machine currently runs a Rexroth GFT or Bonfiglioli 700C equivalent, Korea Ever-Power provides a cross-reference table identifying the matching EP model and confirming the spindle bore, drum OD, motor interface, and brake port dimensions \u2014 same business day from enquiry, at no charge and without order commitment.<\/p>\n<\/div>\n<\/div>\n

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Complete Drive Assembly \u2014 Motor, Valves, and Gearbox as One Package<\/h3>\n

While the EP-SE400T1 is designed for standard plug-in motors, Korea Ever-Power can supply a pre-assembled and tested drive package \u2014 gearbox, hydraulic motor, pressure relief valve, and overcenter (counterbalance) valve \u2014 as a single unit with a single part number. Pre-assembly eliminates motor-gearbox interface errors in the field and reduces machine assembly time. The assembled package arrives test-run and oil-filled, ready for chassis installation.<\/p>\n<\/div>\n<\/div>\n

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\ud83d\udee0\ufe0f<\/span><\/p>\n

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Full Spare Parts Inventory \u2014 Seal Kits, Bearings, Disc Sets<\/h3>\n

Korea Ever-Power maintains stock of all internal wearing components for the EP-SE400T1: mechanical face seal kits, taper roller bearing sets, multi-disc brake friction disc sets, sun gear and planet gear assemblies. A machine in the field with a failed seal or worn brake disc can be back in service from parts arrival \u2014 no waiting for an entire new gearbox. Seal kit and bearing set pricing is available on the product technical page without order requirement.<\/p>\n<\/div>\n<\/div>\n

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\u221220\u00b0C to +90\u00b0C \u2014 No Specification Adjustment for Cold or Hot Climates<\/h3>\n

The EP-SE400T1 temperature range covers the full operational envelope from Nordic forestry (ambient \u221220\u00b0C cold-start) to Middle East mining (ambient +50\u00b0C with housing reaching +90\u00b0C in direct sun). Oil viscosity selection (VG 150 for cold climates, VG 220 for hot) is the only field adjustment required. The mechanical face seals maintain sealing force across this temperature range because the sealing mechanism is spring-loaded metal contact rather than elastomer compression, which varies significantly with temperature.<\/p>\n<\/div>\n<\/div>\n

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12-Month Warranty from Commissioning \u2014 18 Months from Shipment<\/h3>\n

Korea Ever-Power covers manufacturing and material defects for 12 months from commissioning or 18 months from shipment date, whichever comes first. Warranty claims cover internal component replacement or gearbox exchange. The warranty period starts from commissioning \u2014 not from order date \u2014 which gives OEMs that stock gearboxes before machine assembly a full 12-month in-service coverage period.<\/p>\n<\/div>\n<\/div>\n

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7\u201314 Day Stock Delivery \u2014 30\u201345 Days for Custom OEM Batches<\/h3>\n

Standard EP-SE400T1 units ship in 7\u201314 days from Korea Ever-Power stock. OEM batch orders with specific motor interface configurations or optional valve integration: 30\u201345 days production lead time. Emergency replacement orders for machines already down in the field can be expedited \u2014 contact Korea Ever-Power sales directly with the machine urgency level and ship-to location for same-day lead time confirmation.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"Korea<\/p>\n<\/section>\n

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EP-SE400T1 Track Drive Planetary Gearbox \u2014 Field Performance Reviews Across Global Deployments<\/h2>\n
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4.8<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n
Based on 70+ verified OEM orders<\/div>\n<\/div>\n
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5\u3064\u661f<\/span><\/p>\n

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86%<\/span><\/p>\n<\/div>\n

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4\u2605<\/span><\/p>\n

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12%<\/span><\/p>\n<\/div>\n

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\u22643 \u2605<\/span><\/p>\n

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2%<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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97%<\/div>\n
\u518d\u6ce8\u6587\u3057\u307e\u3059<\/div>\n<\/div>\n
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<1%<\/div>\n
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M<\/div>\n
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M. Richardson \u2014 Mobile Crusher OEM Engineer<\/div>\n
Verified Purchase \u00b7 Pennsylvania, USA<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We build compact tracked impact crushers for quarry and demolition contractors. Replaced the travel drives on our 4-tonne model with EP-SE400T1 after chronic seal failures on the previous supplier’s units working in high-silica aggregate dust. Korea Ever-Power’s dimensional drawings matched our chassis to within 0.3 mm on the spindle bore. After 4,000 operating hours of abrasive dust exposure, zero seal leaks, brake holds perfectly on 20-degree rock stockpile climbs. The spring-applied brake also eliminated a runaway incident on a steep ramp \u2014 the machine stops the instant the operator releases the control.<\/p>\n

EP-SE400T1 \u00b7 Compact tracked crusher \u00b7 4,000 h, zero seal failures, brake slope-hold confirmed<\/div>\n<\/div>\n
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T<\/div>\n
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T. Lindqvist \u2014 Tracked Feller-Buncher Builder<\/div>\n
Verified Purchase \u00b7 Alberta, Canada<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We field these machines in the Alberta boreal forest \u2014 deep snow, frozen muskeg, and temperatures that regularly hit \u221230\u00b0C. The previous travel drive units had lip seals that hardened in cold and allowed oil ingestion from frozen mud during river crossing operations. Replaced 1:1 with EP-SE400T1 units. Field swap took under two hours per machine. Metal face seals have survived two full winters including frozen mud packing events that previously destroyed gearboxes within a season. Cold-start performance at \u221220\u00b0C with VG 150 oil is normal with no warm-up delay required.<\/p>\n

EP-SE400T1 \u00b7 Tracked feller-buncher \u00b7 2 Arctic winters, \u221230\u00b0C cold-start, metal face seal survival<\/div>\n<\/div>\n
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A<\/div>\n
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A. Ferreira \u2014 Tracked Sugarcane Harvester OEM<\/div>\n
Verified Purchase \u00b7 Mato Grosso, Brazil<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Our tracked harvesters work wet clay sugarcane fields at +40\u00b0C ambient during harvest season. The EP-SE400T1 runs continuously for 12-hour shifts. We measured housing surface temperature at 74\u00b0C peak \u2014 well within the 90\u00b0C spec. Efficiency stays above 96%, confirmed by the fact that our hydraulic cooler temperature doesn’t rise when we switched from the previous drives that were running at 92\u201393% efficiency. Full harvest season complete, zero breakdowns across a fleet of six machines. Cost-to-performance ratio versus the European brand we replaced is dramatically in our favour.<\/p>\n

EP-SE400T1 \u00b7 Tracked sugarcane harvester \u00b7 74\u00b0C peak housing temp, >96% efficiency confirmed, 6-machine fleet<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Korea Ever-Power \u2014 Beyond the Track Drive: A Complete Industrial Drive Portfolio<\/h2>\n

The EP-SE400T1 is one product in a broader range of heavy-duty and precision drive solutions. Whether the requirement is lifting, slewing, propulsion, or high-precision servo positioning, Korea Ever-Power manufactures the gearbox at the centre of the system.<\/p>\n

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Track Drive Planetary Gearboxes \u2014 Crawler Final Drives<\/h3>\n

The EP-SE400T1 is the entry model of the Korea Ever-Power track drive planetary gearbox series. The range extends from 1,300 N\u00b7m single-stage units up through multi-stage configurations exceeding 400,000 N\u00b7m for large mining excavators, tunnel boring machines, and heavy crawler cranes. Rotating-housing design, spring-applied parking brakes, and floating mechanical face seals are standard across the series.<\/p>\n<\/div>\n

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Winch Drive & Hoist Reducers \u2014 Load Holding Under Gravity<\/h3>\n

Korea Ever-Power winch drive planetary gearboxes are engineered for crane winches, marine deck winches, and construction hoist drives where the load must be held stationary without continuous hydraulic pressure. The worm-planetary combined configuration provides self-locking mechanical hold; the multi-disc wet brake provides the active holding function during load transfer. Rated lifting torques from 2,000 to 1,200,000 N\u00b7m.<\/p>\n<\/div>\n

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Wheel Drive Units \u2014 Wheeled Mobile Equipment<\/h3>\n

For wheeled heavy vehicles \u2014 agricultural sprayers, aerial work platforms, airport ground support equipment, and industrial container handlers \u2014 Korea Ever-Power wheel drive units integrate the planetary reduction and hub bearing in a single assembly that bolts directly to the wheel hub. The shaft-output design differs from the rotating-housing track drive configuration and is optimised for continuous rolling contact rather than intermittent track engagement.<\/p>\n<\/div>\n

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Slewing & Swing Drives \u2014 Rotational Positioning Under Load<\/h3>\n

Excavator upper-structure swing drives, wind turbine yaw and pitch drives, and solar tracker azimuth drives require a planetary gearbox that can resist large overturning moments while positioning a heavy rotating superstructure. Korea Ever-Power slewing drives combine planetary reduction with an integrated slewing bearing \u2014 the output pinion engages a large-diameter ring gear on the rotating platform. These drives provide the holding torque required to keep a loaded excavator cab stationary on an incline with the engine off.<\/p>\n<\/div>\n

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High Precision Planetary Gearboxes \u2014 Servo & CNC Applications<\/a><\/h3>\n

At the opposite end of the torque and precision spectrum from the EP-SE400T1, Korea Ever-Power’s high precision planetary gearbox series \u2014 including the EP-TM, EP-TNF, EP-TEG, and EP-TMR \u2014 delivers backlash from P0 \u22641 arcmin to P2 grade for servo motor, stepper motor, and electric linear actuator integration. These units serve CNC machine tool rotary axes, collaborative robot joints, semiconductor wafer handling equipment, and precision laser scanning systems where sub-millimetre positioning repeatability is the design requirement.<\/p>\n

\"\u5e73\u9762\u6b6f\u8eca\u88c5\u7f6e\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Technical FAQ \u2014 EP-SE400T1 Track Drive Planetary Gearbox Selection & Installation<\/h2>\n
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Q<\/span>Is the EP-SE400T1 truly a 1:1 drop-in replacement for Rexroth GFT and Bonfiglioli 700C equivalent models?<\/h3>\n

For this size class of track drive planetary gearbox, the mounting flange bolt circle, spigot diameters, spindle bore dimensions, motor interface geometry, brake port location, and gear ratio match the equivalent size models in the Rexroth GFT track drive range and the Bonfiglioli 700C crawler drive range. Korea Ever-Power provides a cross-reference dimensional comparison document \u2014 specifying the exact legacy model being replaced \u2014 before order placement. If any dimension differs from the chassis requirements, this is identified at the cross-reference stage before the machine comes off line, not after installation attempt. (Rexroth and Bonfiglioli are trademarks of their respective owners, cited for dimensional reference only.)<\/p>\n<\/div>\n

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Q<\/span>The hydraulic motor I’m using outputs up to 1,200 rpm at maximum pump flow. Does this damage the EP-SE400T1?<\/h3>\n

The 1,000 rpm rating is a continuous duty limit \u2014 the bearing fatigue life and oil film formation assumptions are based on 1,000 rpm rated speed. Brief exceedances (e.g. 1,200 rpm for less than 10% of operating time during downhill travel on no-load or overcenter valve release) will reduce bearing L10 life proportionally but typically do not cause immediate damage. For applications where the motor regularly exceeds 1,000 rpm at full pump flow, Korea Ever-Power recommends either selecting a smaller motor displacement (to cap motor output speed within 1,000 rpm at max pump flow) or specifying the next larger EP-SE series model with a higher rated input speed. Contact Korea Ever-Power application engineering with your pump flow and motor displacement data for a specific recommendation.<\/p>\n<\/div>\n

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Q<\/span>What oil grade and quantity does EP-SE400T1 require, and how is the level checked in the field?<\/h3>\n

Use EP (Extreme Pressure) gear oil to API GL-5 specification: ISO VG 150 for ambient temperatures below +15\u00b0C, ISO VG 220 for ambient above +15\u00b0C. Oil volume varies slightly by motor adapter configuration \u2014 the Korea Ever-Power dimensional drawing includes the fill volume for each configuration, typically 0.8\u20131.2 litres for EP-SE400T1. Fill through the highest port on the housing with the gearbox in its operating orientation. Level check through the side port: oil should reach the bottom of the side port opening. Do not overfill \u2014 excess oil foams under gear churning and can push past the face seals. First drain and fill at 150 operating hours; subsequent change every 1,000 hours or annually, whichever is sooner.<\/p>\n<\/div>\n

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Q<\/span>How is the spring brake pilot pressure circuit connected, and what pressure is required to release the brake?<\/h3>\n

The brake release port accepts a dedicated pilot line, typically tapped from the machine pilot hydraulic circuit at 25\u201335 bar. This pressure must remain present continuously throughout travel \u2014 the moment it drops below the release threshold, the spring pack re-engages. Most machines connect the brake pilot line to the travel spool outlet so brake release and travel motion are always simultaneous. The brake port size, thread specification, and exact release pressure are in the Korea Ever-Power dimensional drawing supplied at quotation. An optional integrated overcenter (counterbalance) valve prevents free-wheeling on downhill grades by requiring back pressure before the motor can rotate freely.<\/p>\n<\/div>\n

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Q<\/span>Can EP-SE400T1 operate submerged in water during river crossings or dredging work?<\/h3>\n

The standard floating mechanical face seals provide excellent protection against mud submersion and intermittent wading \u2014 typical of forestry, agricultural, and construction river crossing conditions. The metal-to-metal sealing face is a positive differential seal: internal oil pressure slightly exceeds external water pressure during normal operation, reinforcing seal integrity. For continuous deep submersion (dredging machines, underwater trenching) or applications where external water pressure exceeds internal oil pressure, Korea Ever-Power offers enhanced marine sealing options. Contact application engineering with the expected submersion depth and operating duration.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Specify EP-SE400T1 \u2014 Cross-Reference Drawing and Fit Confirmation Before Order<\/h2>\n

Provide your existing drive model, machine weight class, hydraulic motor specification, and required timeline. Korea Ever-Power returns dimensional cross-reference, fit confirmation, and delivery lead time \u2014 same-day response for urgent machine-down enquiries.<\/p>\n

1,300 N\u00b7m \u00b7 i=6.09 \u00b7 Spring brake 130 N\u00b7m \u00b7 Floating metal face seals \u00b7 Stock 7\u201314 days<\/p>\n

Explore all Track Drive Planetary gearbox \u2192
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 <\/p>","protected":false},"excerpt":{"rendered":"

\n
\u2605 EP-SE400T1 \u2014 A Track Drive Planetary Gearbox Built on an Inverted Architecture That Most Engineers Never Encounter<\/div>\n

In a standard planetary gearbox, the ring gear is stationary and the planet carrier rotates as the output. The EP-SE400T1 reverses this completely<\/strong>: the planet carrier is fixed to the machine frame via the hollow spindle, and the ring gear \u2014 cast as one piece with the outer rotating drum \u2014 is the output element. The drum is<\/em> the sprocket hub. There is no output shaft, no coupling, and no adapter flange. The track drive planetary gearbox<\/a> delivers 1,300 N\u00b7m directly to the crawler track through the rotating housing, with the entire assembly sitting inside the track frame width \u2014 zero axial protrusion beyond the sprocket plane.<\/p>\n

The integral spring-applied \/ hydraulically-released multi-disc parking brake holds 130 N\u00b7m without any hydraulic pressure \u2014 automatically engaging within one second of pressure loss. The floating metal-to-metal face seals and oil bath lubrication are designed for the mud, grit, and water immersion that tracked machine operation demands.<\/p>\n<\/div>","protected":false},"featured_media":807,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[966],"product_tag":[],"class_list":["post-806","product","type-product","status-publish","has-post-thumbnail","product_cat-track-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/product\/806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/comments?post=806"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/media\/807"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/media?parent=806"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/product_brand?post=806"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/product_cat?post=806"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ja\/wp-json\/wp\/v2\/product_tag?post=806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}