{"id":896,"date":"2026-06-18T01:58:34","date_gmt":"2026-06-18T01:58:34","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=896"},"modified":"2026-06-18T01:58:34","modified_gmt":"2026-06-18T01:58:34","slug":"606l2-l3-planetary-wheel-drive-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ceb\/product\/606l2-l3-planetary-wheel-drive-gearbox\/","title":{"rendered":"606L2, L3 Planetary Wheel Drive Gearbox Reducer"},"content":{"rendered":"
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<\/p>\n

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606L2 \/ L3 \u2014 Choose Your Architecture, Keep the Same 12,000 Nm<\/h2>\n
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TWO-STAGE<\/div>\n
L2<\/div>\n

Ratios 30, 35, 43. Shorter housing, higher thermal capacity, maximum efficiency. For machines that prioritise speed and continuous duty cycle over extreme reduction.<\/p>\n<\/div>\n

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THREE-STAGE<\/div>\n
L3<\/div>\n

Ratios 30, 35, 43, 68, 79. Full ratio coverage including high-reduction creep speeds. Accepts smaller-displacement, higher-speed motors for lower motor cost.<\/p>\n<\/div>\n<\/div>\n

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The EP-606 crosses the 10,000 Nm threshold in the planetary wheel drive gearbox<\/a> range and introduces a capability that no smaller model offers: the same torque output in two different internal architectures. This matters because machine designers face a fundamental trade-off between the number of planetary stages and the motor they can use. More stages mean higher reduction per stage, which means the motor can be smaller, spin faster, and cost less \u2014 but the additional gear mesh reduces efficiency by 1-2% per stage and lengthens the housing.<\/p>\n

The 606 L2\/L3 choice lets engineers resolve this trade-off at the specification stage rather than after commitment. At ratios 30-43, both variants are available and the choice is purely about housing length, motor preference, and thermal duty. At ratios 68 and 79, only the L3 provides the necessary reduction \u2014 these high ratios are geometrically impossible in a two-stage planetary arrangement at this torque class.<\/p>\n<\/div>\n

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\"606L2\/L3<\/p>\n

12,000 Nm<\/span>
\n300-800 Nm Brake<\/span>
\n165 kg<\/span>
\n3,000 RPM<\/span><\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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606L2 \/ L3 Wheel Drive Gearbox \u2014 Technical Parameters<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Output torque (rated max)<\/td>\n12,000 Nm<\/td>\n<\/tr>\n
Mga ratio sa gear<\/td>\n30 \u00a0|\u00a0 35 \u00a0|\u00a0 43 \u00a0|\u00a0 68 \u00a0|\u00a0 79<\/td>\n<\/tr>\n
Configuration options<\/td>\nL2 (2-stage): ratios 30, 35, 43 \u00a0\u00b7\u00a0 L3 (3-stage): ratios 30, 35, 43, 68, 79<\/td>\n<\/tr>\n
Maximum input speed<\/td>\n3,000 rpm<\/td>\n<\/tr>\n
Mechanical efficiency<\/td>\n\u2265 94%<\/td>\n<\/tr>\n
Parking brake range<\/td>\n300 – 800 Nm, spring-applied, hydraulic release (multiple disc options)<\/td>\n<\/tr>\n
Emergency towing<\/td>\nManual declutch (free-wheel disconnect)<\/td>\n<\/tr>\n
Wheel mounting<\/td>\nRotating flange, SAE\/ISO bolt circle<\/td>\n<\/tr>\n
Dry weight<\/td>\nApprox. 165 kg (varies by L2\/L3 and brake option)<\/td>\n<\/tr>\n
Lubrication<\/td>\nOil bath splash, API GL-5 EP gear oil<\/td>\n<\/tr>\n
Temperatura sa operasyon<\/td>\n-25 to +85 deg C (Viton seals available)<\/td>\n<\/tr>\n
Gear material<\/td>\nCarburised alloy steel, CNC ground, HRC 58-62<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

<\/p>\n

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Two Stages or Three \u2014 How to Choose the Right Wheel Drive Architecture<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Decision Factor<\/th>\n606L2 (Two-Stage)<\/th>\n606L3 (Three-Stage)<\/th>\n<\/tr>\n<\/thead>\n
Available ratios<\/td>\n30, 35, 43<\/td>\n30, 35, 43, 68, 79<\/td>\n<\/tr>\n
Efficiency at ratio 35<\/td>\n~95%<\/td>\n~94%<\/td>\n<\/tr>\n
Housing axial length<\/td>\nShorter<\/td>\nLonger (additional stage)<\/td>\n<\/tr>\n
Thermal power capacity<\/td>\nHigher (fewer mesh losses)<\/td>\nLower<\/td>\n<\/tr>\n
Motor displacement needed<\/td>\nLarger (lower ratio)<\/td>\nSmaller at high ratios<\/td>\n<\/tr>\n
Max ground speed (600 mm tyre)<\/td>\n22.6 km\/h at ratio 30<\/td>\n8.6 km\/h at ratio 79<\/td>\n<\/tr>\n
Best suited for<\/td>\nFast travel, continuous duty<\/td>\nHeavy traction, steep grades<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Choose L2 when:<\/strong><\/p>\n

Your target ratio is 30, 35, or 43. Continuous-duty applications where thermal capacity matters (loaders cycling 8+ hours at full load). Chassis designs where the shorter housing provides critical tyre clearance. Machines that need maximum travel speed for road transit.<\/p>\n<\/div>\n

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Choose L3 when:<\/strong><\/p>\n

Your target ratio is 68 or 79 (L2 cannot reach these). Your hydraulic system uses high-speed, small-displacement motors that benefit from the additional gear reduction. Machines operating primarily at low speeds on steep terrain where the 1% efficiency difference is less important than the traction force delivered.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"606L2,<\/p>\n

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300 to 800 Nm \u2014 Selecting the Right Brake for a 12,000 Nm Wheel Drive<\/h2>\n

The 606 offers the widest brake torque range in the planetary wheel drive catalogue. The correct size depends on the vehicle weight, the steepest grade the machine must park on, the tyre radius, and the number of driven wheels. The chart below provides starting-point recommendations \u2014 final verification requires a vehicle-specific grade-holding calculation.<\/p>\n

\n\n\n\n\n\n\n\n\n
Klase sa Sakyanan<\/th>\nGVW<\/th>\nMax Park Grade<\/th>\nBrake (Nm)<\/th>\nRationale<\/th>\n<\/tr>\n<\/thead>\n
Yard loader, flat site<\/td>\n12-15 t<\/td>\n5%<\/td>\n300<\/td>\nMinimal grade, 4WD, ample ratio multiplication<\/td>\n<\/tr>\n
General construction loader<\/td>\n15-18 t<\/td>\n15%<\/td>\n500<\/td>\nModerate grades, mixed terrain<\/td>\n<\/tr>\n
Quarry \/ mining hauler<\/td>\n18-25 t<\/td>\n20%<\/td>\n650<\/td>\nSteep ramps, loaded on grade, safety-critical<\/td>\n<\/tr>\n
ADT \/ steep-site earthmover<\/td>\n20-28 t<\/td>\n25%+<\/td>\n800<\/td>\nMaximum holding force, regulatory compliance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Brake holding torque at the wheel = brake torque x gear ratio. At ratio 43 with 800 Nm brake: 800 x 43 = 34,400 Nm per wheel. For a 25-tonne machine with 600 mm tyre radius and 4WD: total holding force = (34,400 \/ 0.6) x 4 = 229,333 N, holding the vehicle on a gradient of approximately 229,333 \/ (25,000 x 9.81) = 93%. In practice, tyre-to-ground adhesion limits the holdable grade to approximately 30-40% on gravel \u2014 the brake capacity significantly exceeds the traction limit, which is the correct engineering outcome.<\/p>\n<\/section>\n

<\/p>\n

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Heavy Wheel Drive Applications \u2014 12,000 Nm and Above<\/h2>\n

\"Heavy-duty<\/p>\n

\n
\n

Large Wheel Loaders (12-18 Tonne)<\/h3>\n

Production loaders in quarries, sand pits, and recycling yards that fill 2.5-4.0 m\u00b3 buckets at 150-200 cycles per shift. The 606L2 at ratio 35 or 43 balances stockpile penetration speed with loaded carry speed. The L2 configuration is preferred here because the continuous-duty cycle demands maximum thermal headroom. The 500-650 Nm brake option handles the 15-20% ramp grades typical of quarry haul roads.<\/p>\n<\/div>\n

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Articulated Dump Trucks (ADTs)<\/h3>\n

ADTs in the 20-28 tonne payload class navigate steep, wet haul roads that would stop a rigid-frame truck. The 606L3 at ratio 68 or 79 provides the creep-speed traction these machines need on 20-25% loaded uphill grades. The 800 Nm brake option is essential for ADTs because the machine must hold safely on any grade it can climb while fully loaded with the engine off \u2014 a regulatory requirement in most mining jurisdictions.<\/p>\n<\/div>\n

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Heavy Forklifts and Container Handlers<\/h3>\n

15-25 tonne capacity forklifts for steel coil handling, timber yard operations, and container depots. The 606L2 at ratio 30 or 35 provides the 15-20 km\/h travel speed these machines need for productive yard transit, while the full 12,000 Nm is available for climbing loading ramps<\/a> with a fully loaded mast. The slewing drive planetary gearbox<\/a> handles the mast tilt and sideshift functions on the same hydraulic platform.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Across the Planetary Gearbox Range<\/h2>\n
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\"ZR24<\/p>\n

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Slewing Drive Planetary Gearbox \u2192<\/a><\/h3>\n

ZR series for upper-structure rotation on the same loaders, ADTs, and forklifts using the 606 for wheel propulsion.<\/p>\n<\/div>\n<\/div>\n

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\"Track<\/p>\n

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Track Drive Planetary Gearbox \u2192<\/a><\/h3>\n

EP-SE series for tracked dozer and loader variants in the same torque class as the 606.<\/p>\n<\/div>\n<\/div>\n

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\"Precision<\/p>\n

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Precision Planetary Gearbox \u2192<\/a><\/h3>\n

For ADT steering mechanisms, forklift mast tilt servo drives, and automated container positioning systems.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Planetary Wheel Drive Gearbox \u2014 Dual-Configuration FAQ<\/h2>\n
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If both L2 and L3 produce 12,000 Nm at ratio 35, why does the L3 exist at that ratio?<\/h3>\n

At ratio 35, the L3 achieves the same output torque using a higher-speed, smaller-displacement motor \u2014 for example, a 35 cc motor at 2,450 rpm instead of a 50 cc motor at 1,715 rpm. The 35 cc motor is lighter, less expensive, and may already be in inventory for other machine systems. If the vehicle designer is standardising on a single motor displacement across multiple machine functions, the L3 configuration gives them more flexibility to do so without compromising wheel drive torque.<\/p>\n<\/div>\n

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Can an L2 unit be field-converted to L3 by adding a third planetary stage?<\/h3>\n

No. The L2 and L3 use different housing castings with different internal cavity lengths. Adding a stage would require a different housing, different bearing arrangement, and different ring gear. The L2 and L3 are separate products that share the same output flange and wheel mounting interface but differ internally. If you need to evaluate both configurations during the development phase, Korea nga Walay Katapusan nga Gahom<\/a> can supply one of each for back-to-back testing on the same vehicle.<\/p>\n<\/div>\n

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What is the actual efficiency difference between the L2 and L3 at the same ratio?<\/h3>\n

Approximately 1-1.5 percentage points. The L2 at ratio 35 typically measures 94.5-95.5% on a test bench, while the L3 at the same ratio measures 93.5-94.5%. On a machine consuming 50 kW of propulsion power, this 1% difference translates to 500 watts of additional heat per wheel drive \u2014 meaningful for thermal management on continuous-duty applications but negligible for intermittent-duty machines. The L3 efficiency is still vastly superior to any worm gear wheel drive<\/a> alternative.<\/p>\n<\/div>\n

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What determines whether a planetary wheel drive needs a 2-stage or 3-stage configuration?<\/h3>\n

Physics. A single planetary stage can produce a ratio of approximately 3:1 to 10:1, depending on the sun-to-ring gear tooth count combination. Two stages in series can therefore produce ratios from roughly 9:1 to 100:1, and three stages from 27:1 to 1,000:1. The 606L2 ratios (30-43) fall within the practical two-stage range. The 606L3 ratios 68 and 79 require the multiplicative effect of three stages because no two-stage combination can reach those values at this torque class while maintaining acceptable gear tooth stress levels.<\/p>\n<\/div>\n

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How does the 800 Nm brake compare to disc brakes at the wheel rim?<\/h3>\n

The 800 Nm brake on the 606 acts at the gearbox input shaft and is multiplied through the gear ratio to the wheel. At ratio 43, the effective holding torque at the wheel is 34,400 Nm \u2014 equivalent to a friction disc brake with a 1,200 mm diameter rotor. No wheel-rim-mounted disc brake of practical size can match this. The trade-off is that the gearbox input brake cannot function as a dynamic service brake during driving \u2014 it is designed only for static holding. Dynamic braking must be provided by the hydrostatic circuit. For machines that require a combination of hydrostatic dynamic braking and mechanical static holding, the 606 with integral input brake provides the most compact and weight-efficient solution.<\/p>\n<\/div>\n

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What maintenance interval applies to the 606L2\/L3 in quarry applications?<\/h3>\n

Oil change every 1,500 hours (reduced from the standard 2,000 hours due to the abrasive dust environment). First change at 250 hours. Use SAE 80W-90 GL-5 EP oil. Inspect the output shaft seal and wheel mounting studs at every oil change. Check brake release pressure and verify that the brake engages fully when the release line is depressurised. The brake disc is a wear component \u2014 inspect disc thickness at 5,000-hour intervals and replace when it reaches the minimum thickness marked on the disc. In quarry conditions, expect a brake disc life of 8,000-15,000 hours depending on the frequency of slope-parking events.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Field Reports<\/h2>\n
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\n
\n
G<\/div>\n
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Gary W. \u2014 Quarry Operations Manager<\/div>\n
Verified Purchase \u00b7 Queensland, Australia \u00b7 March 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Six 606L2 units at ratio 43 on our 15-tonne production loaders. These machines run 10-hour shifts, 6 days a week, filling haul trucks from a granite stockpile. After 14 months and roughly 3,600 hours per unit, no bearing issues, no seal leaks, and the brake disc inspection at 3,000 hours showed minimal wear. The oil analysis trending is clean. The L2 was the right call for this application \u2014 continuous duty at 43:1 needs the thermal headroom that the shorter two-stage housing provides.<\/p>\n<\/div>\n

\n
\n
E<\/div>\n
\n
Erik J. \u2014 ADT Product Development<\/div>\n
Verified Purchase<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We prototyped both the 606L2 at ratio 43 and the 606L3 at ratio 68 on our 25-tonne ADT platform during the development phase. Ever-Power supplied one of each for back-to-back testing on the same vehicle. The L3 at 68 won because our haul roads in the target market (West African gold mining) average 22% grade and the extra reduction meant we could use a smaller pump without sacrificing loaded hill-climb speed. The L2 at 43 went into our flat-terrain quarry variant. Same vehicle, two spec sheets, one wheel drive family.<\/p>\n<\/div>\n

\n
\n
J<\/div>\n
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Joao S. \u2014 Forklift Fleet Supervisor<\/div>\n
Verified Purchase \u00b7 May 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

Steel coil handling forklift, 20-tonne capacity, 606L2 ratio 30. The drive handles the 16% ramp into our warehouse with a loaded coil without any hesitation. The 500 Nm brake holds on the ramp with engine off. The 4-star is because our chassis design left very tight clearance between the 606 housing and the inner fender, and the L2 barely fits \u2014 the L3 would not have cleared. It would help if the product data sheet included a clear dimensional envelope drawing so we could have verified this before the first prototype. The drive itself is performing well.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

The EP-606 planetary gearbox is the first model in the Korea Ever-Power wheel drive catalogue that lets the machine designer choose between a two-stage (L2) and a three-stage (L3) planetary reduction within the same 12,000 Nm torque envelope. The L2 delivers lower ratios (30-43) with maximum thermal efficiency in a shorter housing. The L3 reaches higher ratios (68-79) for slow-speed heavy traction in a configuration that accepts smaller, lighter hydraulic motors. Five discrete ratios, brake options from 300 to 800 Nm, and a 165 kg package built for the machines that move mining stockpiles, haul aggregate, and handle 20-tonne containers.<\/div>","protected":false},"featured_media":907,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[968],"product_tag":[],"class_list":["post-896","product","type-product","status-publish","has-post-thumbnail","product_cat-wheel-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/product\/896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/comments?post=896"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/media\/907"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/media?parent=896"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/product_brand?post=896"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/product_cat?post=896"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ceb\/wp-json\/wp\/v2\/product_tag?post=896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}