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Dozer Final Drive Parts: Aftermarket Drivetrain Parts For Bulldozers
EquipXR stocks aftermarket final drives, gear components, and final drive assembly rebuild kits for dozers. Our aftermarket final drive parts are sized and spec’d to fit CAT, Komatsu, John Deere, CASE, Liebherr, Dressta, and other dozer manufacturers.
Whether you need a complete replacement final drive or individual components for a repair, we will identify the correct parts for your equipment. Send us your dozer make, model, serial number, and OEM part number when available. Our team will confirm compatibility, provide pricing, and help get the parts shipped as quickly as possible.
Aftermarket Final Drive & Drivetrain Parts For All Makes & Models
EquipXR offers aftermarket final drive components for a wide range of small, mid-size, and large bulldozers. Our parts are selected to meet the specifications required for the applicable machine and final-drive configuration. Every final drive part we sell is built to meet or exceed OEM specifications: case-hardened gears, precision bearings, and the duo-cone and face seals that keep contamination out.
Because final drive designs vary by model, serial number, production year, and machine arrangement, we recommend providing as much identifying information as possible when requesting a quote.
If you do not see the component or specific part number you need listed, still contact EquipXR. We have a large stock of over 50,000 parts in warehouses around the country and will source hard-to-find parts for legacy and discontinued machines from our connected parts network.
Complete Final Drive Assemblies
When a final drive is too far gone to repair piece by piece, a complete final drive assembly gets the machine back to work fastest. A complete assembly is the preferred option when the existing final drive has extensive internal damage or when replacing several internal components individually does not make sense from a cost perspective.
EquipXR supplies complete replacement final drive assemblies for a wide range of bulldozers from Caterpillar, John Deere, CASE, Komatsu, Dressta, Liebherr, and other manufacturers. Some complete drives are model-specific, so we confirm the assembly against your machine and gauge before it ships.
The part numbers below are a partial list of common final drive OEM part numbers for popular dozer makes and models. If you do not see the exact part number you need, contact EquipXR. We likely still have the final drive parts you need in stock or will quickly source them for a wide range of equipment models. Our parts experts will help confirm the correct fit using your machine model, serial number, and equipment information during the quote process.
- CAT 104-3139 (Final drive assembly/reference)
- CAT 110-2664 (Final drive assembly)
- CAT 185-7593 (Final drive group)
- CAT 191-4931 (Complete final drive assembly)
- CAT 265-2299 (Final drive assembly)
- CAT 336-5750 (Final drive group)
- CAT 8E-5273 (Final drive)
- CAT 8G-2443 (Final drive)
- CAT 9G-7365 (Final drive assembly)
- CCE 47691756 (Complete final drive)
- CCE 84490715 (Complete final drive)
- CCE A50130 (RH final drive assembly)
- JD AT159737 (Final drive)
- JD AT159738 (LH final drive)
- JD AT190200 (LH final drive)
- JD AT190201 (RH final drive)
- JD AT280612 (RH final drive)
- JD AT31047 (Complete final drive)
- JD AT338099 (Complete final drive)
- JD AT352357 (Complete final drive)
- JD AT450289 (Complete final drive)
- KM 12Y-27-10100 (Final drive assembly)
- KM 12Y-27-10101 (Final drive assembly)
- KM 12Y-27-10300 (Final drive assembly)
- KM 12Y-27-10301 (Final drive assembly)
- KM 14X-27-00010 Final (drive assembly, LH)
- KM 14X-27-00310 (Final drive assembly)
- KM 14X-27-00320 (Final drive assembly)
- KM 17A-27-00122 (Final drive assembly/reference)
- KM 17A-27-00123 (Final drive assembly/reference)
- LB 1000135 (Drive motor / final-drive application)
- LB 9006345 (Final drive)
- LB 9331609 (Final drive)
- LB 10343120 (Final drive)
All manufacturer names, symbols, brands, and OEM part numbers are used for identification and reference purposes only. EquipXR does not represent that any listed part is an OEM product. All part details should be verified with an EquipXR parts specialist prior to ordering to confirm aftermarket compatibility with your dozer make and model.
Final Drive Replacement Gears & Hardware Components
Final Drive Planetary Gear Sets
We stock sun gears, planet gears, ring gears, and carriers so you can replace a worn planetary gear set without buying a whole drive. We offer complete matched gear sets or individual components depending on the final drive and what is available for your machine. We will match the gears to the correct tooth count, diameter, spline configuration, and overall final drive design.
Bull Gears, Bevel Gears & Pinion Sets
EquipXR supplies replacement bull gears, bevel gears, bevel and pinion gear sets, pinion gears, and related final drive gearing for many bulldozer models. Available components vary by diameter, tooth count, bore, spline design, and final drive configuration, with individual gears and matched sets available depending on the machine.
Final Drive Rebuild Kits & Hardware
A rebuild kit gathers the seals, o-rings, bearings, and gaskets you need to overhaul a final drive in one package, so nothing gets missed on reassembly. Best practice on any overhaul is to replace all seals and o-rings while the unit is open, since pulling it apart twice costs far more than the parts. We stock rebuild kits and hardware matched to common dozer final drives. Tell us the machine, and we’ll make sure the kit has everything the job needs.
Final Drive Gear Shafts
EquipXR supplies gear shafts, pinion shafts, planetary shafts, and other internal final drive shafts for many bulldozer models. Replacement shafts are available in a range of lengths, diameters, spline configurations, and bearing surface designs to match different final drive assemblies. We also offer the related gears, bearings, seals, and hardware needed to complete the repair or rebuild.
Final Drive Bearings & Seals
EquipXR offers a wide range of replacement bearings, seals, bushings, and related hardware for bulldozer final drive assemblies. Available components include tapered roller bearings, roller bearings, needle bearings, thrust bearings, races, cups, cones, shaft seals, oil seals, mechanical seals, O-rings, and bushings in multiple sizes and configurations. If you only need a few components to complete a final drive rebuild, send us the part numbers or parts list, and we will check availability.
Final Drive Covers & Housings
EquipXR supplies replacement final drive housings, covers, hubs, plates, caps, and related case components for many bulldozer models and final drive assemblies. Available parts vary by application and can be matched to the required housing design, spline configuration, bolt pattern, dimensions, and mounting arrangement. Complete housings and hub assemblies may also be available depending on the machine and final drive configuration.
OEM-Equivalent Aftermarket Dozer Final Drives
EquipXR supplies aftermarket final drive parts for bulldozers from many of the industry’s major manufacturers. Every component and assembly we stock is cataloged against the OEM numbers it replaces, so a number from your CAT, Komatsu, John Deere, CASE, Liebherr, or Dressta parts book gets you straight to an exact-fit aftermarket equivalent. Availability varies by model, so contact our team with the machine information and the components you need.
The same dozer model may have more than one final drive arrangement depending on production changes, serial number ranges, transmission configuration, or other machine specifications. An OEM number is especially useful when sourcing internal gears, bearings, shafts, seals, and rebuild components.
Final Drive Compatibility by OEM Bulldozer Brand
We supply aftermarket final drive parts and rebuilt assemblies for the dozer brands below, covering small crawler dozers through large production machines. Fit depends on model, serial range, and gauge configuration, not brand alone, so treat this table as a starting point (this is only a partial list) and confirm your spec with our parts team before ordering. Final drive parts may be available for additional models, older machines, and less common configurations. If you do not see your bulldozer listed, send us the machine information, and we will try to find the parts you need.
| OEM Dozer Manufacturer | Popular Dozer Models We Support |
|---|---|
| Caterpillar Dozers | D3, D4, D5, D6, D7, D8, D9, D10, D11 and related series |
| John Deere | 450, 550, 650, 700, 750, 850, 950 and related models |
| CASE | 450, 550, 650, 750, 850, 1150, 1650, 2050 and related models |
| Komatsu | D31, D37, D39, D51, D61, D65, D85, D155 and related models |
| Dressta | TD-7, TD-8, TD-9, TD-14, TD-15, TD-20, TD-25 and related models |
| Liebherr | PR 716, PR 726, PR 736, PR 746, PR 756 and related models |
All manufacturers’ names, symbols, brands, and part numbers are used for reference purposes only. Those references help identify compatibility and do not indicate that any listed part is an OEM product.
Should You Repair, Rebuild, or Replace Your Final Drive?
The right option depends on the extent of the damage, the condition of the major components, and the cost and availability of replacement parts.
A repair may be the best choice when the damage is limited to a small number of components, such as seals, bearings, bushings, or individual gears. If the housing, shafts, and most of the internal gearing are still in good condition, replacing only the worn or damaged parts is the most practical option.
A rebuild makes sense when the final drive needs more extensive internal work but the major hard parts can still be reused. Rebuilds commonly involve replacing bearings, seals, bushings, gears, shafts, and other wear components while retaining usable housings and related assemblies.
A complete replacement final drive may be the better option when multiple major components are damaged, the housing is cracked or heavily worn, or the cost of individual parts and labor approaches the price of a complete assembly. Replacement also makes sense when faster turnaround is the priority.
EquipXR supplies individual final drive components, rebuild parts, and complete replacement assemblies. If you already know what you need, send us the part numbers or machine information, and we will check the available options.
Frequently Asked Questions About Dozer Final Drives
A dozer final drive is the last stage of the powertrain, converting powertrain output into the low-speed, high-torque rotation that turns the sprocket and moves the track. It houses a planetary gear reduction along with the bearings and seals that support and protect it. Without a functioning final drive on each side, the dozer can’t move under power, regardless of engine or hydraulic system condition.
Watch for oil leaking behind the sprocket, rattling or whining from the drive housing, excessive heat at the housing, vibration, and sluggish track drive. These warning signs often appear well before catastrophic failure. An oil leak behind the sprocket usually indicates a failing seal, and that’s the cheapest time to fix it.
Note: Contamination is responsible for the vast majority of final drive failures, and seal problems alone account for roughly 40 to 50% of those failures. A seal leak can turn into a larger replacement once dirty oil chews through the bearings and gears.
It’s the gear system that multiplies torque inside the final drive. A central sun gear drives three planet gears that mesh with an outer ring gear, turning motor speed into the high-torque, low-speed rotation that moves the track. The design packs a lot of gear reduction into a compact, durable package, which is why nearly all crawler dozers use it.
Often no. Standard-gauge and LGP (low ground pressure) configurations frequently use different bull gears, bearing cones, and seals. That’s why we ask for your gauge configuration along with the model and serial number. Confirming gauge before ordering prevents the most common fitment mistake on final drive parts.
Yes. An overtight track chain loads the final drive’s main hub bearings harder than they’re meant to carry, which can lead to early bearing failure. It’s one reason correct track sag matters beyond just chain wear. If you’re replacing a hub bearing, check your track adjuster and tension so the new bearing doesn’t meet the same fate.
Most manufacturers recommend checking final drive oil levels at regular service intervals and changing the oil on a set schedule, typically in the range of 1,000 to 2,000 operating hours under normal conditions. Dusty, wet, or high-load applications shorten that interval. Check your machine’s operation and maintenance manual for the specific interval and oil grade.
You should buy individual components when you’ve identified a specific failed part, and the rest of the drive is healthy. Choose a complete assembly when damage is widespread, the housing is compromised, or getting the machine running again quickly is worth more than the price difference. We stock both, so the decision can be based on the condition of your drive rather than on what’s available.
Related Dozer Powertrain & Undercarriage Parts
A final drive failure often prompts a closer look at the rest of the undercarriage, since the sprocket, track chain, and idler all share the load the final drive transfers.
- Sprockets & Segments: Mount to the final drive, and excessive wear can affect how the track engages and may place additional load on the final drive. Inspect the sprocket or sprocket segments for worn, hooked, chipped, or uneven teeth.
- Track Chains: Check the track chain for excessive pitch wear, tight links, damaged bushings, or uneven wear. A worn or binding chain increases resistance through the undercarriage and adds load to the final drive.
- Track Rollers & Carrier Rollers: Inspect rollers for seized bearings, excessive play, leaks, flat spots, or uneven wear. Rollers that do not turn freely increase drag and force the final drive to work harder.
- Idlers: Check the idlers for bearing play, uneven wear, damage, and proper movement within the track frame. A worn or binding idler contributes to poor track alignment and excessive undercarriage resistance.
- Track Adjusters & Recoil Spring Assemblies: Make sure the track adjuster and recoil assembly are operating correctly, and the track is not running too tight. Excessive track tension increases loads on the sprocket, bearings, shafts, and internal final drive components.
- Transmission & Powertrain Components: If the final drive failure involved broken gears, damaged splines, or a loss of drive, inspect the related transmission and drivetrain components as well. Shafts, couplers, bearings, gears, and splines upstream of the final drive may have experienced the same shock load or wear.
Checking these components before putting the machine back into service will identify any additional repairs that are needed while the dozer is already down and reduce the chance of damaging the replacement final drive.
Why Buy Final Drive Parts from EquipXR
Components & Complete Assemblies
Everything from a single seal or bearing to a complete new aftermarket final drive, so you can buy exactly what the repair calls for instead of more than you need.
Fit Confirmed Before It Ships
Every order is checked against your part number or serial number by our parts specialists. If something doesn’t cross-reference cleanly, we call you before we ship, not after.
OEM-Equivalent Quality
Case-hardened gears, precision bearings, and quality seals built to meet or exceed OEM specs, at a price well under dealer or OEM cost.
Fast Quotes, Fast Shipping
Same-day quotes on 50,000+ parts in stock across 12+ US warehouses, for faster shipping to wherever your machine is down.
Get The Final Drive Parts Your Construction Equipment Needs
Don’t let a failed final drive keep your dozer out of commission longer than necessary. EquipXR has the final drive assemblies, rebuild kits, and components to get your machine back up and running. Send your machine model, serial number, and OEM part number, or a description of what the drive is doing, and we’ll get back to you with the right parts and a price, usually the same day. Call us or use the quote form to get started.