{"id":900,"date":"2026-06-18T02:03:17","date_gmt":"2026-06-18T02:03:17","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=900"},"modified":"2026-06-18T02:03:17","modified_gmt":"2026-06-18T02:03:17","slug":"609l2-l3-planetary-wheel-drive-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/nl\/product\/609l2-l3-planetary-wheel-drive-gearbox\/","title":{"rendered":"609L2, L3 Planetary Wheel Drive Gearbox"},"content":{"rendered":"
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<\/p>\n

\n
\n
\n
23,000<\/div>\n
Nm Output Torque<\/div>\n<\/div>\n
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33-142<\/div>\n
Verhoudingsbereik<\/div>\n<\/div>\n
\n
220<\/div>\n
kg Dry Weight<\/div>\n<\/div>\n<\/div>\n

609L2 \/ L3 \u2014 The Widest Ratio Spread in the Heavy-Duty Wheel Drive Range<\/h2>\n
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A 4.3:1 ratio spread within a single planetary wheel drive gearbox<\/a> family means that the EP-609 can be configured for a 35-tonne mining truck roading at 18 km\/h on ratio 33 \u2014 and for a heavy-lift modular transporter creeping at 1.5 km\/h on ratio 142 \u2014 without changing the output flange, wheel mounting interface, or brake system. For equipment fleet operators running diverse vehicle types across multiple sites, this means one spare parts programme, one maintenance training package, and one procurement contract for machines with fundamentally different speed and torque requirements.<\/p>\n

Available in both L2 (two-stage, lower ratios) and L3 (three-stage, full ratio range) configurations. The L2 provides higher efficiency at ratios from 33 to approximately 50. The L3 extends the ratio range to 142 and accepts smaller, higher-speed hydraulic motors. Integral parking brake from 300 to 600 Nm with manual declutch for emergency towing.<\/p>\n<\/div>\n

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\"609L2\/L3<\/p>\n

300-600 Nm Brake<\/span>
\nL2 \/ L3<\/span>
\n3,000 RPM<\/span>
\n-25 to +85 deg C<\/span><\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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609L2 \/ L3 Planetary Wheel Drive \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>\n23,000 Nm<\/td>\n<\/tr>\n
Gear ratio range<\/td>\n33 to 142 (L2: lower ratios \/ L3: full range)<\/td>\n<\/tr>\n
Configuration options<\/td>\nL2 (2-stage) or L3 (3-stage)<\/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<\/td>\n300 – 600 Nm, spring-applied, hydraulic release<\/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. 220 kg<\/td>\n<\/tr>\n
Smering<\/td>\nOil bath splash, API GL-5 EP gear oil<\/td>\n<\/tr>\n
Bedrijfstemperatuur<\/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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Beyond Peak Torque \u2014 Verifying the 609 Against Your Actual Duty Cycle<\/h2>\n

A wheel drive planetary gearbox rated at 23,000 Nm does not mean every application generating 23,000 Nm is a suitable match. The gearbox rating assumes a specific relationship between peak torque, average torque, and duty cycle duration. Verifying that your application falls within the design envelope is the most important step in the specification process \u2014 and the one most frequently skipped.<\/p>\n

\"609L2,<\/p>\n

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\u2460 Define your torque histogram<\/h3>\n

Record or estimate the percentage of operating time spent at each torque level. A mining truck might spend 30% of its cycle at full torque (loaded uphill), 40% at 50% torque (empty return), 20% at 10% torque (idling at load\/dump), and 10% at zero torque (standing). The weighted average \u2014 the RMS torque \u2014 is the number that determines gear and bearing fatigue life, not the peak.<\/p>\n<\/div>\n

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\u2461 Calculate the equivalent continuous torque<\/h3>\n

T(eq) = square root of (sum of T(i) squared x t(i) \/ t(total)). For the mining truck example: T(eq) = sqrt(23,000\u00b2 x 0.30 + 11,500\u00b2 x 0.40 + 2,300\u00b2 x 0.20) = sqrt(158,700,000 + 52,900,000 + 1,058,000) = approximately 14,580 Nm. This equivalent continuous torque must be below the 609 rated continuous capacity for the target bearing life (typically 20,000 hours L10).<\/p>\n<\/div>\n

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\u2462 Verify thermal capacity<\/h3>\n

Calculate the average input power: P(avg) = T(eq) x output speed x 2 x 3.14 \/ 60 \/ efficiency. The heat generated is P(avg) x (1 – efficiency). This heat must be dissipated by the 220 kg housing through natural convection. If the calculated sump temperature exceeds 80 deg C, either the duty cycle is too severe for the 609 frame (step up to the 610) or the thermal management must be supplemented with oil cooling or forced-air ventilation of the housing.<\/p>\n<\/div>\n<\/div>\n

Key principle: <\/span>
\nA machine that touches 23,000 Nm for 10% of its cycle and averages 12,000 Nm is a comfortable fit for the 609. A machine that sustains 23,000 Nm for 60% of its cycle may need the 610 (30,000 Nm) despite never exceeding the 609 peak rating. The duty cycle, not the peak torque, determines the correct model.<\/span><\/div>\n<\/section>\n

<\/p>\n

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One Wheel Drive Part Number for the Entire Fleet \u2014 How Wide Ratios Enable Standardisation<\/h2>\n

Mining and port operations run mixed fleets: haulers, loaders, cranes, and support vehicles with different speed requirements but overlapping torque demands. The 609 ratio range from 33 to 142 is wide enough to cover most of these applications within a single gearbox family, which creates measurable procurement and maintenance advantages.<\/p>\n

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Spare Parts Reduction<\/strong><\/p>\n

All 609 variants share the same output seals, input seals, breather valves, and brake assemblies. A fleet running three different ratio configurations (for example, 33 for trucks, 75 for loaders, and 108 for cranes) carries one seal kit, one brake assembly, and one oil specification. Compare this to three different gearbox brands, each with unique seals, brakes, and oil types \u2014 the inventory saving is immediate and significant.<\/p>\n<\/div>\n

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Training Simplification<\/strong><\/p>\n

Maintenance technicians trained on the 609 can service every vehicle in the fleet that uses it. The oil change procedure, brake inspection method, declutch operation, and seal replacement technique are identical across all ratio configurations. On a remote mining site where technician specialisation is a luxury, this standardisation directly reduces the risk of maintenance errors caused by unfamiliarity with multiple drive brands.<\/p>\n<\/div>\n

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Procurement Leverage<\/strong><\/p>\n

Consolidating all wheel drive procurement under one model family increases the order volume per supplier, which improves pricing, lead time priority, and technical support responsiveness. A fleet consuming 40 units per year across three ratio configurations has more commercial leverage than one ordering 12 units from three separate suppliers. Contact Korea Ever-Power<\/a> for fleet volume pricing structures.<\/p>\n<\/div>\n

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Failure Mode Tracking<\/strong><\/p>\n

When the entire fleet uses the same planetary wheel drive gearbox family, oil analysis data, vibration trends, and failure modes can be compared across all machines. A seal failure pattern appearing on the loaders but not the trucks reveals an application-specific issue (for example, chemical exposure from the loader bucket) rather than a product defect \u2014 intelligence that is impossible to extract when every machine type uses a different drive brand.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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23,000 Nm Wheel Drive Applications \u2014 Where Fleet Standardisation Pays Off<\/h2>\n

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

\n
\n

Mining Rigid-Frame Trucks (30-50 t Payload)<\/h3>\n

Production haul trucks climbing 15-20% loaded grades at 8-12 km\/h for 10-hour shifts. The 609L2 at lower ratios (33-50) provides the speed for long, moderate-grade haul roads, while the 609L3 at higher ratios (75-142) suits short, steep pit ramps. The 600 Nm brake multiplied through the gear ratio provides holding torque that exceeds tyre adhesion on any grade the truck can physically climb. Multiple track drive gearboxes<\/a> complement the 609 on ancillary crawler equipment within the same mining fleet.<\/p>\n<\/div>\n

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Port Reach Stackers and Container Handlers<\/h3>\n

Reach stackers handling 30-45 tonne containers require 20,000-23,000 Nm of wheel torque to accelerate loaded from a standing start on the quay apron. The 609L2 at ratio 33-40 provides the 15-20 km\/h inter-stack travel speed these machines need for productive container throughput, while the full 23,000 Nm is available for the initial breakaway from standstill with a loaded container at maximum boom extension. The slewing drive planetary gearbox<\/a> handles the boom swing on the same hydraulic platform.<\/p>\n<\/div>\n

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Heavy Mobile Cranes (50-100 t Lifting)<\/h3>\n

All-terrain and rough-terrain cranes with lifting capacities of 50-100 tonnes require high wheel torque for both road travel and on-site creep positioning under load. The 609L3 at ratio 75-108 provides the controlled low-speed movement these cranes need when driving under load to set steel beams or position heavy industrial equipment<\/a> onto foundations. The 4.3:1 ratio range within the 609 family means the crane OEM can offer road-speed and site-speed variants without changing the chassis design.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Adjacent Models and Complementary Drives<\/h2>\n
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\"ZR30<\/p>\n

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

ZR series for reach stacker boom swing, crane upper-structure slewing, and mining truck body tilt mechanisms.<\/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 crawler dozers, excavators, and drilling rigs within the same mining fleet.<\/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 reach stacker spreader rotation, crane hook-block anti-rotation drives, and container handling alignment systems.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Heavy-Duty Planetary Wheel Drive Gearbox \u2014 Specification FAQ<\/h2>\n
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Is the 33-142 ratio range a set of fixed options or a continuous custom range?<\/h3>\n

The 609 offers a series of discrete ratios within the 33-142 range, determined by the available sun, planet, and ring gear tooth count combinations. The exact ratio list and the number of available points depend on the L2 or L3 configuration selected. Contact Korea Ever-Power with your target ratio and we will confirm the nearest available value, which is typically within 2-3% of the target. For fleet orders exceeding 20 units, custom tooth count combinations outside the standard list may be feasible.<\/p>\n<\/div>\n

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How does the 609 compare to the 607 (17,000 Nm) for a 35-tonne mining truck?<\/h3>\n

A 35-tonne truck at full payload (GVW approximately 55-65 tonnes) climbing a 20% grade with a rolling resistance of 0.04 requires approximately 90,000-115,000 N of total tractive force. Divided across four wheel drives, each unit must produce 22,500-28,750 N at the tyre. With a 700 mm tyre radius, the required torque per wheel is 15,750-20,125 Nm. The 607 at 17,000 Nm is marginal \u2014 it works with a safety factor of only 1.08 at worst case. The 609 at 23,000 Nm provides a safety factor of 1.14-1.46, which is the engineering-standard minimum for mining applications where overload events (hitting a berm, acceleration on a loose surface) are routine.<\/p>\n<\/div>\n

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What oil volume does the 609 require and how often should it be sampled?<\/h3>\n

Approximately 4-5 litres depending on mounting angle and L2\/L3 configuration. For mining and heavy industrial applications, sample the oil every 500 hours for particle count, water content, and viscosity trending. Change the oil every 1,500 hours (mining) or 2,000 hours (port\/crane), with the first change at 250 hours. The oil analysis programme is the single most effective predictive maintenance tool for any planetary wheel drive gearbox \u2014 it detects bearing and gear wear 2,000-3,000 hours before a failure becomes audible or visible.<\/p>\n<\/div>\n

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Can a wormwielreductor<\/a> achieve 23,000 Nm output in a comparable package?<\/h3>\n

A worm gear could theoretically produce 23,000 Nm, but at 40-65% efficiency, the input power requirement would be 35,000-57,500 watts versus 24,500 watts for the 609 at 94% efficiency. The worm housing would need to dissipate 10,500-33,000 watts of heat \u2014 requiring a housing 3-5 times larger and heavier than the 609 to maintain acceptable operating temperature. At this torque class, the planetary architecture is the only practical solution for mobile equipment where weight, size, and energy efficiency are constrained.<\/p>\n<\/div>\n

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What is the expected service life of the 609 in continuous mining duty?<\/h3>\n

With proper maintenance (oil changes, seal inspections, brake disc checks), the target service life before first overhaul is 20,000 hours at rated duty cycle. The gears themselves \u2014 carburised alloy steel at HRC 58-62 \u2014 are typically not the life-limiting component. The first components to require attention are usually the output seal (8,000-15,000 hours depending on dust exposure) and the brake friction disc (10,000-20,000 hours depending on slope-parking frequency). Both are field-replaceable without removing the gearbox from the vehicle.<\/p>\n<\/div>\n

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How does the wheel drive planetary gearbox handle dynamic weight transfer during braking and acceleration?<\/h3>\n

During hard braking on a loaded truck, weight transfers to the front axle, increasing the radial load on the front wheel drives and decreasing it on the rear. The 609 output bearings are sized for the maximum possible radial load \u2014 the full axle weight plus the dynamic weight transfer component. For a 60-tonne GVW truck with a 60\/40 front\/rear weight split during braking, each front wheel drive carries approximately 18 tonnes of radial load. The 609 oversized tapered roller bearing set at 220 kg housing weight is designed for this condition at the full 20,000-hour L10 bearing life target.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Field Reports<\/h2>\n
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\n
S<\/div>\n
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Steve B. \u2014 Mining Fleet Maintenance Manager<\/div>\n
Verified Purchase \u00b7 Pilbara, Western Australia \u00b7 March 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We standardised on the 609 across our fleet: ratio 45 for the 40-tonne haul trucks, ratio 80 for the water carts, and ratio 33 for the service vehicles. One seal kit, one brake assembly, one oil specification, one training package. When a truck wheel drive needed an emergency seal replacement at 2 AM during a night shift, the technician had done the exact same job on a water cart the week before. It took 90 minutes instead of the 4 hours it would have taken with an unfamiliar brand. That is the value of standardisation.<\/p>\n<\/div>\n

\n
\n
L<\/div>\n
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Lim K. \u2014 Port Equipment Engineering Lead<\/div>\n
Verified Purchase<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Reach stacker fleet, 8 units, 609L2 ratio 38. The machines handle 40-tonne containers on a busy multi-user terminal. The 609 replaced a European brand that was discontinued. Ever-Power matched the mounting dimensions within 48 hours of receiving the old drawing. Oil analysis at 4,000 hours trending shows lower iron particle counts than the previous brand at the same interval. Operator feedback: smoother breakaway from standstill with a loaded container. We have placed a follow-up order for four additional units.<\/p>\n<\/div>\n

\n
\n
M<\/div>\n
\n
Marco F. \u2014 Heavy Crane OEM Project Manager<\/div>\n
Verified Purchase \u00b7 May 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

70-tonne all-terrain crane, 609L3 ratio 95. The prototype performed well through our entire certification test programme including the 30% grade climb test at full counterweight. The crane roads at 12 km\/h and creeps at 2 km\/h under load \u2014 both within specification. The 4-star rating reflects our one concern: the 609 is the heaviest wheel drive we have used on this platform (220 kg vs 195 kg for the previous supplier), and the additional 25 kg per corner raised our total vehicle weight by 200 kg, which we had to recover from other components to meet our axle load certification limit. The weight is not a product flaw \u2014 it reflects the additional bearing capacity \u2014 but lighter would be better if the torque and durability can be maintained.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

The widest ratio range in the heavy-duty wheel drive catalogue. From 33:1 to 142:1, the EP-609 covers a 4.3:1 speed spread within a single product family \u2014 enough to serve a 35-tonne mining truck on a high-speed haul road and a 400-tonne port reach stacker creeping along a container quay with the same gearbox platform. At 23,000 Nm output torque, the 609 enters the domain of machines where a single wheel drive failure during operation can halt an entire mining bench or delay a vessel departure. The engineering at this torque class is not about marketing specifications. It is about the confidence that 220 kg of carburised steel, tapered roller bearings, and FKM-sealed housing will deliver 20,000 hours of service before the first scheduled overhaul.<\/div>","protected":false},"featured_media":910,"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-900","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\/nl\/wp-json\/wp\/v2\/product\/900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/comments?post=900"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/media\/910"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/media?parent=900"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_brand?post=900"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_cat?post=900"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_tag?post=900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}