{"id":1039,"date":"2026-06-23T05:49:39","date_gmt":"2026-06-23T05:49:39","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=1039"},"modified":"2026-06-23T05:49:39","modified_gmt":"2026-06-23T05:49:39","slug":"track-drive-planetary-gearbox-for-dump-trucks","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/pt\/track-drive-planetary-gearbox-for-dump-trucks\/","title":{"rendered":"Track Drive Planetary Gearbox for Dump Trucks"},"content":{"rendered":"
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\"Track<\/p>\n
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Application Engineering<\/span>
\nTracked Dump Trucks<\/span><\/div>\n

Track Drive Planetary Gearbox for Dump Trucks \u2014 Full Payload, Steep Grade, Soft Ground<\/h1>\n

A wheeled articulated dump truck at full payload on a 15% grade in wet clay? Spinning tyres and zero progress. The same payload on the same grade with a tracked dump truck: steady 6 km\/h uphill, no wheel spin, no ruts, no ground destruction. The track drive planetary gearbox<\/strong> makes this possible \u2014 and it does it for 8 to 10 hours per shift, uphill and loaded, in the harshest conditions on any haul road.<\/p>\n

Browse Track Drive Planetary Gearboxes \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Tracked vs Wheeled Dump Trucks \u2014 The Engineering Case for Tracks on Unprepared Ground<\/h2>\n

The decision between a wheeled articulated dump truck (ADT) and a tracked dump truck (also called a tracked carrier or crawler carrier) is fundamentally a ground condition decision. On a well-maintained gravel haul road, the wheeled ADT is faster, cheaper per tonne-kilometre, and more fuel-efficient. On anything softer \u2014 and “softer” includes most conditions encountered in reclamation, landfill, pipeline, peat, and wet-season earthmoving \u2014 the tracked dumper delivers the payload while the wheeled hauler cannot.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Par\u00e2metro<\/th>\nWheeled ADT (30 t payload)<\/th>\nTracked Dumper (15 t payload)<\/th>\n<\/tr>\n<\/thead>\n
Ground pressure (loaded)<\/td>\n180 \u2013 350 kPa<\/td>\n30 \u2013 55 kPa (6x lower)<\/td>\n<\/tr>\n
Soft ground trafficability<\/td>\nFails below CBR 8<\/td>\nOperates to CBR 2 \u2013 3<\/td>\n<\/tr>\n
Max grade (loaded, soft)<\/td>\n8 \u2013 12% (traction limited)<\/td>\n20 \u2013 30% (engine limited)<\/td>\n<\/tr>\n
Loaded speed (flat)<\/td>\n25 \u2013 40 km\/h<\/td>\n8 \u2013 12 km\/h<\/td>\n<\/tr>\n
Ground damage<\/td>\nSevere rutting on soft ground<\/td>\nMinimal \u2014 distributes load<\/td>\n<\/tr>\n
Final drive type<\/td>\nWheel drive planetary gearbox<\/a><\/td>\nTrack drive planetary gearbox<\/a><\/td>\n<\/tr>\n
Fuel per tonne-km<\/td>\nLower (on good road)<\/td>\nHigher (track friction)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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The break-even point:<\/strong> When the ground CBR (California Bearing Ratio) falls below 8 \u2014 roughly the condition of a wet clay site after rain \u2014 the wheeled ADT begins to lose traction, sink into ruts, and require haul road maintenance. Below CBR 4, the wheeled ADT cannot operate at all. The tracked dumper continues working to CBR 2 to 3, eliminating the haul road construction and maintenance cost entirely. For sites where ground improvement would cost more than the tracked dumper productivity reduction (lower speed, lower payload per trip), the tracked option is the economically rational choice regardless of the per-tonne-km fuel premium.<\/p>\n<\/div>\n<\/section>\n

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Grade Resistance with Payload \u2014 The Load Case That Sizes Tracked Dumper Track Drives<\/h2>\n

A tracked dump truck carries its payload uphill. Every metre of elevation gain at full payload requires sustained torque at the track drives \u2014 torque that must be maintained for the entire haul distance, which can be 200 to 2,000 metres on large earthmoving and reclamation projects. This sustained loaded-uphill duty is the defining track drive load case for dump trucks.<\/p>\n

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Grade Resistance Sizing \u2014 15 t Payload Tracked Dumper, 20% Grade<\/div>\n
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Dado:<\/div>\n
\u00a0\u00a0Machine empty weight: 18,000 kg<\/div>\n
\u00a0\u00a0Payload: 15,000 kg<\/div>\n
\u00a0\u00a0Gross vehicle weight (GVW): 33,000 kg<\/div>\n
\u00a0\u00a0Track drives: 2 (one per track)<\/div>\n
\u00a0\u00a0Sprocket PCD: 550 mm (r = 0.275 m)<\/div>\n
\u00a0\u00a0Haul grade: 20% (11.3 degrees)<\/div>\n
\u00a0\u00a0Rolling resistance (soft clay): 8%<\/div>\n
Step 1 \u2014 Grade resistance per track (loaded):<\/div>\n
\u00a0\u00a0F_grade = (33,000 x 9.81 x sin(11.3)) \/ 2<\/div>\n
\u00a0\u00a0F_grade = 31,723 N per track<\/strong><\/div>\n
Step 2 \u2014 Rolling resistance per track (soft clay at 8%):<\/div>\n
\u00a0\u00a0F_roll = (33,000 x 9.81 x 0.08) \/ 2<\/div>\n
\u00a0\u00a0F_roll = 12,949 N per track<\/strong><\/div>\n
Step 3 \u2014 Total sustained torque per track drive:<\/div>\n
\u00a0\u00a0T = (31,723 + 12,949) x 0.275<\/div>\n
\u00a0\u00a0T = 12,285 Nm sustained, for the entire uphill haul<\/strong><\/div>\n
Step 4 \u2014 Apply SF = 1.5 (sustained hauling, moderate shock):<\/div>\n
\u00a0\u00a0T_required = 12,285 x 1.5 = 18,428 Nm minimum continuous torque<\/strong><\/div>\n
Step 5 \u2014 Return trip check (empty, downhill, braking):<\/div>\n
\u00a0\u00a0Braking force (empty, 20% downgrade): (18,000 x 9.81 x sin(11.3)) \/ 2<\/div>\n
\u00a0\u00a0= 17,300 N per track \u2192 brake must hold 4,758 Nm<\/strong><\/div>\n
\u2192 Korea Ever-Power 22,000 Nm track drive with integrated 6,000 Nm brake \u2714<\/div>\n<\/div>\n<\/div>\n
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Why rolling resistance matters more on soft ground<\/div>\n

On a compacted gravel haul road, rolling resistance is 3 to 4% of GVW. On soft clay, it rises to 8 to 12%. On peat or landfill waste, it can reach 15 to 20%. At 15% rolling resistance on a 20% grade, the rolling resistance force nearly equals the grade resistance force \u2014 meaning the total track drive torque requirement is nearly double what the grade calculation alone predicts. Engineers who size the track drive for grade resistance only, ignoring the soft-ground rolling resistance, undersize the gearbox by 30 to 50%.<\/p>\n<\/div>\n

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The return trip thermal benefit<\/div>\n

The tracked dumper hauls uphill (loaded, high torque, high heat) and returns downhill (empty, low torque, engine braking). The return trip is a cooling interval \u2014 the track drive oil temperature decreases during the downhill coast. This natural thermal cycle is unique to hauling applications and gives the track drive a thermal rest that bulldozers never receive. The effective duty cycle for thermal sizing is 50 to 60% \u2014 lower than a bulldozer (75 to 85%) despite the dumper working continuously for the entire shift.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"Track<\/p>\n

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Payload-to-Weight Ratio \u2014 Why Tracked Dumpers Need More Torque Per Tonne Than Wheeled Haulers<\/h2>\n

A wheeled ADT typically carries a payload equal to its empty weight \u2014 a 30-tonne truck carries 30 tonnes, doubling the GVW. A tracked dumper carries a payload of 60 to 90% of its empty weight \u2014 an 18-tonne machine carries 15 tonnes, increasing the GVW by 83%. The tracked dumper is heavier per tonne of payload because of the track undercarriage, which weighs 30 to 50% more than the equivalent wheeled running gear.<\/p>\n

This lower payload-to-weight ratio means the tracked dumper must move more dead weight per tonne of payload hauled \u2014 increasing the torque requirement at the track drives per unit of productive capacity. On flat, firm ground, this makes the tracked dumper less efficient than the wheeled ADT. But on soft ground where the wheeled ADT cannot operate at all, the comparison is irrelevant \u2014 the tracked dumper is 100% productive while the wheeled option is 0% productive.<\/p>\n

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83%<\/div>\n
GVW increase (tracked, 15 t payload on 18 t machine)<\/div>\n<\/div>\n
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100%<\/div>\n
GVW increase (wheeled, 30 t payload on 30 t truck)<\/div>\n<\/div>\n
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6x<\/div>\n
lower ground pressure (tracked vs wheeled)<\/div>\n<\/div>\n
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0<\/div>\n
haul road maintenance cost on tracked routes<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Five Applications Where Tracked Dump Trucks Eliminate Wheeled Hauler Limitations<\/h2>\n

The tracked dump truck is not a general-purpose hauler. It is a specialist machine that excels in five specific conditions where wheeled trucks fail or where the cost of making a wheeled truck operational (haul road construction and maintenance) exceeds the cost of the tracked truck productivity reduction.<\/p>\n

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Landfill and Waste Sites<\/div>\n

Waste material CBR: 1 to 3. Wheeled trucks sink immediately. Tracked dumpers haul cover material across active landfill cells without ground improvement. The track drive operates in the most corrosive environment of any hauling application \u2014 landfill leachate attacks seals and housing surfaces.<\/p>\n<\/div>\n

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Reclamation and Dredge Fill<\/div>\n

Newly deposited dredge fill has near-zero bearing capacity until it consolidates. Tracked dumpers spread fill across the surface, distributing weight to avoid punching through the unconsolidated layer. The track drive must operate partially submerged in saturated sand and water at every cycle.<\/p>\n<\/div>\n

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Pipeline and Utility Corridors<\/div>\n

Pipeline right-of-way haul paths cross agricultural land, wetlands, and forested terrain where haul road construction is prohibited or impractical. Tracked dumpers haul pipe, backfill material, and equipment along the corridor with minimal surface disturbance. Korea Ever-Power planetary gearboxes<\/a> serve the complete pipeline equipment fleet.<\/p>\n<\/div>\n

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Peat Bogs and Wetlands<\/div>\n

Peat bearing capacity: 10 to 25 kPa \u2014 well below any wheeled vehicle. Tracked dumpers with wide tracks (500 to 700 mm) achieve ground pressures of 20 to 30 kPa, enabling material transport across active peat extraction zones without ground collapse.<\/p>\n<\/div>\n

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Wet-Season Earthmoving<\/div>\n

During monsoon and rainy seasons in tropical construction, wheeled haulers are grounded for weeks. Tracked dumpers continue operating on saturated soil \u2014 maintaining the project schedule when weather shuts down the wheeled fleet. The additional fuel cost per tonne is offset by the elimination of weather-delay penalties.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Three Track Drive Failure Modes Specific to Tracked Dump Truck Service<\/h2>\n
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1<\/div>\n
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Sustained thermal overload during long uphill hauls on soft ground<\/div>\n

Unlike a bulldozer that pushes for 60 to 120 metres per pass, a tracked dump truck hauls uphill for 200 to 2,000 metres per trip \u2014 at sustained near-maximum torque on soft ground. The combined grade resistance plus soft-ground rolling resistance produces continuous heat input to the track drive oil bath for 3 to 15 minutes per loaded trip. On long haul routes in hot climates, the oil temperature can exceed 110 degrees C before the loaded trip is complete. Repeated thermal cycling above the oil film threshold accelerates gear tooth surface fatigue.<\/p>\n

Prevention: Monitor oil temperature on long haul routes. Reduce speed by 20% on grades exceeding 15% if oil temperature approaches 100 degrees C. Specify synthetic gear oil for tropical and desert sites.<\/div>\n<\/div>\n<\/div>\n
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2<\/div>\n
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Corrosive environment degradation at landfill and reclamation sites<\/div>\n

Landfill leachate (pH 5 to 8, containing dissolved metals and organic acids) and saltwater (reclamation sites) attack the track drive housing, seal faces, and fastener threads. Over 2,000 to 4,000 hours of operation in these environments, housing surfaces corrode, seal lip material degrades, and bolt torque relaxes as corrosion weakens the clamping interface. The gearbox housing, which appears structurally sound, may have 20 to 30% reduced wall thickness at corrosion hotspots.<\/p>\n

Prevention: Apply marine-grade anti-corrosion coating to the housing and fasteners. Inspect housing wall thickness at each major service. For landfill operations, use stainless steel fasteners and FKM seal compounds rated for chemical exposure.<\/div>\n<\/div>\n<\/div>\n
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3<\/div>\n
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Asymmetric loading from uneven payload distribution<\/div>\n

A tracked dump truck loaded by an excavator often receives material unevenly \u2014 more weight on one side of the body than the other. On a 15-tonne payload, a 60\/40 split puts 9 tonnes over one track and 6 tonnes over the other \u2014 a 50% load asymmetry. The heavier track drive operates at 120 to 130% of the nominal per-track loading, while the lighter side operates at 70 to 80%. Over thousands of haul cycles, the heavily loaded side accumulates disproportionate bearing and gear wear, resulting in one track drive failing while the other still has 40 to 60% of its remaining life.<\/p>\n

Prevention: Train excavator operators to centre the load in the dump body. Apply a 1.3x asymmetric loading factor when sizing the track drive \u2014 both drives should be rated for 130% of the nominal per-track torque.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Track Drive Planetary Gearbox for Dump Trucks \u2014 Frequently Asked Questions<\/h2>\n
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How does the track drive duty cycle of a dump truck compare to a bulldozer?<\/h3>\n

The bulldozer operates at 60 to 85% sustained torque with no thermal relief \u2014 every pass is loaded in both directions (push forward, reverse back). The tracked dump truck operates at 80 to 100% torque during the loaded uphill haul but at only 10 to 30% torque during the empty downhill return. This return-trip thermal relief reduces the effective thermal duty cycle to 50 to 60% \u2014 significantly lower than a bulldozer. However, the individual loaded haul event can be longer than any single bulldozer push pass (2,000 metres vs 120 metres), producing a longer continuous high-torque period per event.<\/p>\n<\/div>\n

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What is the typical service life of a tracked dump truck track drive?<\/h3>\n

Standard earthmoving and reclamation: 6,000 to 8,000 hours. Landfill (corrosive environment): 4,000 to 6,000 hours. Pipeline (mixed terrain, moderate duty): 7,000 to 10,000 hours. The thermal cycling between loaded uphill and empty downhill provides a natural relief that extends gear life compared to bulldozer service at the same torque rating. However, the corrosive environments where tracked dump trucks commonly operate (landfill, reclamation, coastal) accelerate housing and seal degradation \u2014 making environment-specific maintenance protocols essential.<\/p>\n<\/div>\n

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Should I size the track drive for the loaded uphill torque or the empty braking torque?<\/h3>\n

Both. The track drive continuous torque rating must accommodate the loaded uphill torque (grade + rolling resistance + SF). The brake must hold the loaded machine on the steepest expected grade during an engine stall. On most tracked dump truck profiles, the loaded uphill torque governs the gearbox rating, while the loaded downhill braking torque governs the brake rating. Both calculations should be performed independently and both must pass before the track drive specification is finalised.<\/p>\n<\/div>\n

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Why does soft-ground rolling resistance matter so much for track drive sizing?<\/h3>\n

On compacted gravel (3 to 4% rolling resistance), the rolling resistance torque is small relative to grade resistance. On soft clay (8 to 12%), rolling resistance nearly equals the grade resistance \u2014 effectively doubling the total track drive torque requirement compared to a hard-surface calculation. On peat or waste fill (15 to 20%), rolling resistance exceeds the grade resistance. An engineer who omits the rolling resistance term or assumes a hard-surface coefficient will undersize the track drive by 30 to 100% depending on the actual ground conditions.<\/p>\n<\/div>\n

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Does Korea Ever-Power supply track drives with corrosion-resistant coatings for landfill service?<\/h3>\n

Yes. Korea Ever-Power offers tracked dump truck track drive planetary gearboxes with marine-grade anti-corrosion housing treatment, FKM chemical-resistant seals, and stainless steel fastener options for landfill, reclamation, and coastal applications. The corrosion-protected specification extends the housing service life by 40 to 60% compared to standard surface treatment in aggressive environments. Provide the operating environment description (landfill, saltwater reclamation, chemical site) for an environment-specific material recommendation.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Tracked Dump Truck Track Drives \u2014 Built for Payload, Grade, and Corrosive Ground<\/div>\n

Korea Ever-Power provides tracked dump truck track drive planetary gearboxes from 10,000 to 80,000 Nm \u2014 covering 6-tonne site dumpers through 30-tonne articulated tracked carriers. Corrosion-protected options available for landfill and reclamation duty. Provide your machine model and site conditions for a specification recommendation.<\/p>\n<\/div>\n

View Track Drive Range \u2192<\/a><\/p>\n
vendas@planetary-gearboxes.com<\/div>\n<\/div>\n<\/div>\n<\/section>\n

Editor: Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Application Engineering Tracked Dump Trucks Track Drive Planetary Gearbox for Dump Trucks \u2014 Full Payload, Steep Grade, Soft Ground A wheeled articulated dump truck at full payload on a 15% grade in wet clay? Spinning tyres and zero progress. The same payload on the same grade with a tracked dump truck: steady 6 km\/h uphill, […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[965],"tags":[],"class_list":["post-1039","post","type-post","status-publish","format-standard","hentry","category-application-and-technical-guid"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/posts\/1039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/comments?post=1039"}],"version-history":[{"count":2,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/posts\/1039\/revisions"}],"predecessor-version":[{"id":1044,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/posts\/1039\/revisions\/1044"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/media?parent=1039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/categories?post=1039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/tags?post=1039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}