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Dozer Track Adjusters & Tensioners: Aftermarket Parts For Bulldozers
EquipXR stocks aftermarket track adjusters, tensioners, recoil springs, and the seal kits and hardware that go with them. We offer exact-fit aftermarket parts for CAT, Komatsu, John Deere, CASE, Hitachi, Liebherr, Dressta, and other popular dozer manufacturers.
Whether you need a complete track adjuster assembly or individual components for a repair, send us your machine information and part requirements. Our dozer parts experts will identify the correct replacement based on your dozer model, serial number, OEM part number, or component specifications.
Aftermarket Track Adjuster & Tensioner Parts For All Makes & Models
EquipXR sources complete track adjuster assemblies and individual replacement parts, so you order only what your undercarriage repair actually requires. Our track adjusters and tensioners are built to the original stroke, bore, and seal specifications, so you get a leak-free, fully functional replacement that maintains tension as the machine did when it was new. Available parts include:
- Complete track adjuster assemblies
- Track tensioner assemblies
- Recoil spring assemblies
- Recoil springs
- Track adjuster cylinders
- Track adjuster pistons and rods
- Seal kits
- Grease valves and relief valves
- Yokes, tubes, pins, bolts, nuts, and mounting hardware
If your track won’t hold tension, the adjuster housing is leaking grease, or you’re rebuilding the whole tensioning system, our parts team will find the parts you need. With 50,000+ parts stocked across multiple warehouses, we will get your cylinders, springs, and complete track tensioner assemblies out the door fast and get your dozer back out in the field quickly.
Complete Track Adjuster & Tensioner Assemblies
When the whole assembly is worn or you’d rather not rebuild in the field, a complete adjuster and track tensioner assembly is the clean fix. These come pre-built and ready to install, typically including the cylinder, recoil spring, fittings, spring pilot, yoke, seal kit, and mounting hardware, so everything in the tension system goes in fresh at once.
EquipXR supplies complete track adjuster assemblies for a range of bulldozer undercarriages. Track adjusters vary between dozer models, serial number ranges, and undercarriage configurations. If you have your OEM part number, send it with your quote request. If you are ordering by machine, provide the manufacturer, model, serial number, and our experts will help match the correct track adjuster and tensioner assembly to your dozer.
The OEM part numbers below are a partial list of our commonly requested track adjuster and track tensioner assemblies for CAT, John Deere, CASE, and Komatsu dozers. Even if your part number is not listed here, we likely have an equivalent aftermarket part in stock. Contact us for our full inventory of aftermarket track adjuster assemblies.
- CAT 108-0800 (Track Adjuster & Recoil Group)
- CAT 196-8563 (Track Adjuster & Recoil Group)
- CAT 239-4373 (Recoil Track Adjuster)
- CAT 297-9142 (Track Adjuster & Recoil Assembly/Group)
- CAT 482-8095 (Track Adjuster)
- CAT 508-6655 (Track Adjuster)
- CAT 528-7391 (Track Adjuster and Recoil Piston)
- CAT 7G-5526 (Track Adjuster & Recoil Group)
- CCE 129162A1 (Complete Track Adjuster Assembly)
- CCE 435384A1
- CCE D35504 (Track Adjuster Assembly)
- CCE D39930
- CCE R29709 (Track Adjuster Assembly)
- CCE R45815 (Complete Track Adjuster Assembly)
- CCE R52132
- CCE R57098 (Complete Track Adjuster Assembly)
- JD AT124173
- JD AT207649
- JD AT210058
- JD AT221027
- JD AT221427
- JD AT342072
- KM 113-30-24161 (Left Hand Track Adjuster Assembly)
- KM 113-30-34231 (RH Track Adjuster Assembly)
- KM 14X-30-13510 (Complete Recoil/Track Tensioner Assembly)
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.
Recoil Springs
Individual replacement recoil springs are available when the rest of the track adjuster assembly can be reused. Complete assemblies may include the recoil spring along with the associated rod, yoke, retainers, guides, or mounting components depending on the design.
We offer aftermarket recoil springs to fit Caterpillar, John Deere, CASE, Komatsu, Dressta, Liebherr, and other crawler dozers. We stock recoil springs matched to the machine’s load rating and dimensions because recoil springs often vary by overall length, outside diameter, wire diameter, and load specification.
Note: Because these springs carry so much preload, plan to have the replacement done by a shop equipped to compress and seat the recoil spring safely.
The OEM part numbers below are a partial list of our commonly requested recoil springs for CAT, John Deere, CASE, and Komatsu dozers. Even if your part number is not listed here, we likely have an equivalent aftermarket part in stock. Contact us for our full inventory of aftermarket recoil springs.
- CAT 115-6423
- CAT 179-2992
- CAT 2V-9035
- CAT 3P1459
- CAT 3P1465
- CAT 3P1885
- CAT 5K2754
- CAT 8Y6659
- CCE R40630
- CCE 87309205
- CCE R43616
- CCE 187917A2
- CCE 334260A1
- CCE D35277
- DT 140498H1
- DT 743004C1
- JD AT313629
- JD AT105605
- JD AT106882
- JD AT20872
- KM 113-30-34211
- KM 134-30-63162
- KM 207-30-54140
- KM 21K-30-24142
- KM 113-30-34210
- KM 134-30-63161
- KM 141-14-32241
- KM 141-14-32751
- KM 14Z-30-31111
- KM 150-10-11221
- KM 155-30-13230
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.
Adjuster Cylinders & Pistons
EquipXR supplies replacement track adjuster cylinders and pistons for a wide range of dozer undercarriages, including components for grease-charged track tensioning systems. Cylinders may also be referred to as adjuster tubes or recoil cylinders, depending on the machine and manufacturer.
Replacement cylinders are available in different bore diameters, stroke lengths, overall lengths, mounting configurations, thread specifications, grease fitting locations, and seal arrangements. Matching the original bore and stroke is important so the rebuilt adjuster holds pressure properly and maintains correct idler alignment.
Track adjuster pistons are also available individually for many dozer models. Options vary by piston diameter, length, seal groove design, rod configuration, and mating cylinder dimensions.
The OEM part numbers below are a partial list of our commonly requested track adjuster cylinders and pistons for CAT, John Deere, CASE, Komatsu, Dressta, and Liebherr dozers. Even if your part number is not listed here, we likely have an equivalent aftermarket part in stock. Contact us for our full inventory of aftermarket track adjuster cylinders and piston rods.
- CAT 1080801 (Cylinder)
- CAT 1156428 (Pistons)
- CAT 104-6374 (Piston)
- CAT 145-3031 (Pistons)
- CAT 215-4104 (Cylinder)
- CAT 2M0125 (Cylinder)
- CAT 3T-7399 (Recoil Piston)
- CAT 3W-8160 (Pistons)
- CAT 421-4688 (Pistons)
- CAT 582-4631 (Cylinder)
- CAT 7T-3697 (Cylinder)
- CAT 7T3928 (Pistons)
- CAT 7T6193 (Cylinder)
- CCE 345070A2 (Track Adjuster Extension Tube)
- CCE 345091A1 (Piston/Rod)
- CCE KLA0142 (Track Adjuster Hydraulic Cylinder)
- CCE D48596 (Cylinders & Adjusters)
- CCE R27161 (Cylinders & Adjusters)
- CCE R41362 (Cylinders & Adjusters)
- DT 622049C1 (Piston)
- DT 629256C1 (Piston)
- DT 629257C1 (Piston)
- DT 655822C2 (Housing & Cylinder)
- DT 655804C1 (Cylinders & Tubes)
- DT 655927C1 (Cylinders & Tubes)
- JD AT124173 (Cylinders & Adjusters)
- JD AT221427 (Cylinders & Adjusters)
- JD AT3691 (Cylinders & Adjusters)
- JD AT124174 (Piston)
- JD AT36389 (Piston)
- JD AT36391 (Piston)
- JD T145145 (Cylinder)
- JD T73206 (Piston/Rod)
- KM 113-30-34230 (LH Cylinder)
- KM 113-30-34240 (RH Cylinder)
- KM 134-30-63154 (Cylinder)
- KM 113-30-24161 (Piston)
- KM 14X-30-13115 (Cylinder)
- KM 14X-30-13512 (Cylinder)
- LB 9645876 (Cylinder)
- LB 5802440 (Grease Tensioner Cylinder)
- LB 10289302 (Piston)
- LB 11652344 (Grease Tensioner Cylinder)
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.
Seal Kits & Grease Valves
EquipXR supplies track adjuster seal kits, grease valves, relief valves, and related components for a wide range of bulldozer track adjusters. Parts are available for many common OEM and aftermarket cylinder designs, with options matched to the specific adjuster configuration used on the machine.
Seal kits may include piston seals, rod seals, O-rings, backup rings, wipers, wear rings, and other sealing components. Depending on the application, complete rebuild kits and smaller, component-specific kits are available to repair only the worn or leaking components. Replacement grease valves and track adjuster relief valves are available in different thread sizes, body styles, fitting configurations, and pressure specifications. EquipXR also offers individual grease fittings, plugs, valve bodies, and related hardware for many applications.
Yokes, Tubes & Mounting Hardware
EquipXR supplies the supporting components used throughout bulldozer track adjuster and recoil assemblies. These parts are available individually for repairs and rebuilds when the main adjuster components are still serviceable.
Available parts may include adjuster yokes, guide tubes, rods, spring retainers, spring seats, fitting guards, brackets, pins, bushings, bolts, nuts, washers, and other mounting hardware. Application-specific hardware kits and individual replacement pieces may also be available depending on the machine.
EquipXR stocks these components individually and also offers them together with cylinders, pistons, seals, grease valves, recoil springs, and other parts needed for a more complete rebuild. When several sections of the adjuster assembly are being rebuilt at the same time, the individual components can be ordered together so that the parts arrive as a single coordinated order.
OEM-Equivalent Aftermarket Dozer Track Adjusters & Track Tensioners
EquipXR supplies aftermarket and replacement track adjuster parts for many popular bulldozer makes and models, including CAT, John Deere, Komatsu, CASE, Liebherr, and Dressta. Each component in our catalog meets or exceeds OEM dimensional and material standards, and our team sources from manufacturers who specialize in heavy equipment undercarriage components. Every part we ship is backed by EquipXR’s warranty.
| Manufacturer | Popular Dozer Models We Support |
|---|---|
| Caterpillar (CAT) | D3, D4, D5, D6, D7, D8, D9, D10, D11 and related model series |
| John Deere | 450, 550, 650, 700, 750, 850, 950 and related model series |
| 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, PR 766 and related models |
Don’t see your model listed? Contact our parts specialists. We support many legacy and discontinued machines and will find the right cylinder, spring, or assembly for your specific serial number and configuration.
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.
Track Adjuster Components & Common Replacement Reasons
Dozer track adjusters hold track tension in one of two ways: a grease-charged mechanical cylinder or a hydraulic tensioner assembly. Grease-type adjusters are the design used on most dozer platforms across CAT, Komatsu, John Deere, CASE, and other major brands, in part because the mechanism has fewer parts to fail than a true hydraulic system.
The recoil spring is the shock absorber for the whole front of the track. It sits under heavy compression and gives just enough when the track hits an obstacle to keep that impact from reaching the rollers, idlers, and final drive. A cracked, warped, or fatigued spring stops protecting those parts even if the machine still seems to run fine, which is why a broken spring is worth catching at inspection.
The adjuster cylinder is the part you actually work on when you set tension. Pumping grease in extends the piston and pushes the idler forward to tighten the track; releasing the valve lets grease back out so the spring retracts the idler and adds slack. When a cylinder is scored, corroded, or worn, it can’t hold that grease pressure, and the track won’t stay where you set it.
Needing to re-tension the track every few days is one of the clearest warning signs of a seal or valve failure. If the tension is correct right after you pump grease but drops again shortly after, one of these parts is most likely allowing pressurized grease to bypass the piston. A set of new seals and O-rings often restores full function for a fraction of the cost of a new cylinder.
The yoke, adjuster tube, fitting guard, and mounting hardware connect the tension system to the idler and the track frame. These parts take constant load and the occasional impact, and a bent yoke or worn tube throws off idler alignment just as surely as a bad cylinder does. Replacing them during an adjuster rebuild keeps the new cylinder and spring aligned properly.
FAQ About Dozer Track Adjusters & Track Tensioners
The usual cause is an internal seal leaking grease past the piston inside the adjuster cylinder. You set tension, the grease slowly bleeds across the worn seal, and the track goes loose again within a day or two with no visible external leak. A seal kit fixes it most of the time; a scored cylinder may need a rebuild or replacement. It’s the most common adjuster problem and the cheapest to fix.
Both cause damage, in different ways. Too loose and the track can derail and wears the rollers, idlers, chain, and sprockets faster. Too tight and the added load stresses the undercarriage and can shorten final drive hub bearing life. The goal is the tension your machine’s manual specifies, which is why a working adjuster matters: it’s the only way to hold the correct setting.
Recoil springs are held under enormous pre-load, often more than 20 tons of force, and a sudden release can cause serious injury or death. Spring replacement is a job for a shop with the right compression tools and trained technicians. We supply the parts, but the spring work itself should not be a field or driveway repair.
They’re parts of the same system and the terms often overlap. The adjuster is the grease cylinder you use to set tension by extending or retracting the idler. The tensioner usually refers to the whole assembly, the cylinder plus the recoil spring, that holds tension and absorbs shock together. When you order, what matters is matching the specific parts to your machine, not the label.
Yes. Grease leaking from the cylinder body is a failing seal, and while it may look minor, it leads to lost tension and a track that won’t stay set. Caught early it’s usually a straightforward seal kit. Left alone it ends in a loose track, derailment risk, and faster undercarriage wear, so it’s worth addressing before it spreads.
Buy individual parts, like a seal kit or a cylinder, when you’ve pinpointed one failure and the rest of the assembly is in good working condition. Choose a complete adjuster and recoil spring assembly when the unit is worn throughout. Another reason to order a complete assembly is the concern about working with the compressed recoil spring, especially if you need to do the repair out in the field.
Pump grease into the adjuster valve to tighten and release the valve to add slack, then set the sag to the figure in your machine’s service manual, since the target varies by model. Exercising the adjuster periodically, tightening and loosening, also confirms the piston isn’t stuck and the valve takes grease. If the track won’t reach or hold the spec, the adjuster needs service.
Give us the OEM part number off the component, or your machine’s model and serial number. Adjuster parts depend on cylinder stroke and bore, spring type, mounting pattern, and serial-number breaks, so the serial number is crucial when ordering by machine. We confirm fit before anything ships because a misstroke or improper mounting will cause alignment problems and uneven wear.
Related Dozer Undercarriage Parts
A track adjuster repair often happens alongside other undercarriage work. The adjuster sets the tension that everything else in the track group lives with, so the parts it protects are worth checking when you service it. EquipXR also supply replacement parts for the surrounding dozer track system, including:
- Dozer track chains
- Track shoes & track pads
- Track rollers & carrier rollers
- Front idlers
- Sprockets and segments
- Final drives
If you are working on more than the track adjuster, send us the complete parts list. Our parts experts are happy to quote multiple dozer undercarriage components for the same machine.
Why Buy Adjuster & Tensioner Parts from EquipXR
EquipXR works with contractors, equipment owners, fleets, repair shops, and parts departments that need the correct replacement part without spending time sorting through dozens of products. We help you source the complete assembly or individual component that matches the information you provide.
Components & Complete Assemblies
Everything from a seal kit to a complete adjuster and recoil spring assembly, 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 for stroke, bore, and mounting by a parts specialist. If something doesn’t cross-reference cleanly, we call you before we ship, not after.
Built to OEM Specs & Quality
EquipXR’s aftermarket parts are built to the original stroke, bore, and seal specifications for a leak-free replacement that holds tension, at a price well under dealer cost.
Fast Quotes & Fast Shipping
When a machine is down, parts availability matters. EquipXR provides fast quotes and works to get available parts moving as quickly as possible often with same-day quotes and shipping for in-stock parts.
Get The Adjuster & Tensioner Parts Your Construction Equipment Needs, Fast
Need a track adjuster, recoil spring assembly, cylinder, piston, seal kit, grease valve, or another tensioner component? Send EquipXR your manufacturer, model, serial number, OEM part number, quantity, and the parts you need. If you have photos or additional numbers from the existing assembly, include those as well.
Even if you do not see your exact track adjuster or part number listed on our website, contact us. The parts shown here represent only a portion of the track adjuster and undercarriage components we have in stock.