Hydraulic Repair Iowa - Social Proof
210 Freel Dr, Ames, IA 50010 515-292-2599

Track Loader Final Drive Repair — CAT, Deere, Bobcat, Case, Kubota

Track Loader Final Drive Repair — Built Around What Actually Fails

Compact track loaders live a harder life than any other machine on a jobsite. Full loads, tight turns on hard concrete, sitting in mud, running downhill braked — every one of those pushes wear into the final drive faster than the design was ever tested for. That is why track loader final drive repair is one of the most common jobs in our bay year-round. It is also one of the most rebuild-friendly jobs, because the parts wear predictably: shaft seals first, then hub bearings, then the brake pack, then the planetary gears.

Ames Hydraulics services compact track loader finals from every mainstream brand — Caterpillar 259, 279, 289, 299, John Deere 331G, 333G, 335G, Bobcat T650, T770, T870, Case TR310, TR340, TR320, TR310B, New Holland C232, C238, C245, Kubota SVL65, SVL75, SVL95, Takeuchi TL8, TL10, TL12, ASV RT-75, RT-120, and Terex PT-100. Every track loader final drive repair follows the same disciplined process regardless of the badge — because the physics of the wear is the same across all of them.

What Fails First on a Track Loader Final Drive

Nine out of ten track loader final drive repair calls start the same way — a leak at the sprocket. Track loaders sit low and their finals collect mud packed between the sprocket and the seal boss. That mud grinds the shaft seal, the seal weeps, the operator does not top off the case, and eight to twelve months later the hub bearing is dry and metal has started to circulate through the planetary. The cheapest track loader final drive repair is the one done while it is still just seals. The most expensive is the one done after the metal traveled.

Full Rebuild Scope on Every Track Loader Final Drive Repair

  • Duo-cone or face seal replacement with new mating rings polished to spec
  • Shaft seals, o-rings, and case gasket — all new
  • Hub bearings — both tapered rollers plus races, preload set to torque spec
  • Planetary sun gear, ring gear, and planet pinions inspected against service limit; matched-set replacement if any one is out
  • Brake stack friction and steel plates measured; spring pack tested against free-length
  • Piston motor group — barrel, pistons, slippers, swashplate, valve plate — measured and rebuilt or replaced
  • Case pressure-tested at reassembly to catch any weep before it ships
  • Loaded pressure and flow test on the bench before it leaves the shop

How We Handle Common Track Loader Final Drive Repair Complaints

The three complaints that account for most of the track loader final drive repair work we see:

  • “Leaking oil at the sprocket.” Duo-cone seal replacement plus shaft seal, bearing preload check, brake pack contamination inspection. If the case oil was low and there is metal on the drain plug, we open the planetary as well — leaving that unopened is what turns a $2K repair into a $6K rebuild.
  • “Grinding or howling when I turn.” Almost always the planetary. Bearing spalling from an earlier seal leak is the number-one root cause. Fixing just the noise without fixing the seal that caused it does not fix the machine.
  • “One track will not spin.” Piston group in the travel motor. Sometimes just a stuck valve plate or a broken slipper. Sometimes catastrophic — barrel gone, swashplate scored. The tear-down tells us which.

Ship-In or Whole-Machine — Central Iowa Bay

Rental fleets and out-of-state contractors ship in the finals — we get 8-12 track loader final drive repair jobs a month from FedEx Freight and R+L. Central Iowa contractors usually drop the whole machine because pulling a final on a T770 or 333G takes a shop crane and a lift and most jobsites do not have either. Either path works. Ship-in customers get photos of the tear-down before parts are ordered.

Two-Week Turn on Standard Track Loader Final Drive Repair

Standard turn from receipt to shipped-out is roughly two weeks. Split into: three to five days for tear-down, inspection, and written quote; one to five days for parts (some Kubota SVL planetary sets run longer); three to four days for rebuild, test, and reassembly. Fleet accounts get scheduled bench time when we know the units are coming. Emergency turnaround is available — call first.

What a Track Loader Final Drive Repair Costs (Range)

Seal-only repair is the low end. Full planetary and hub rebuild is the middle. Complete rebuild including piston motor group is the top end. Every track loader final drive repair here is quoted in writing after tear-down — no vague phone estimates, no surprise bills. If the case is worn beyond service limit, we quote an exchange unit against the rebuild and let you choose.

Frequently Asked Questions

My track loader final drive is leaking — can I run it until harvest?

Only if you check case oil every day and top off. Running with low oil for even a few hours will kill the bearings and turn a $2K seal job into a $5-6K full rebuild.

Do you rebuild ASV and Terex finals?

Yes. Same process as CAT/Deere/Bobcat — the internals are conventional planetary and piston motor construction, and parts are available from ASV/Terex or aftermarket.

Can you rebuild both sides at once and match them?

Yes, and fleet customers usually do. Matched-pair rebuilds run at the same time on the bench so tolerances land within a tight window between the two sides.

Do I need to send both finals if only one is leaking?

No — one side is fine. But if the machine has 4,000+ hours we recommend at least a seal-and-inspect on the healthy side while you have the machine down, because it is next in line.

Do you warranty track loader final drive repair?

Yes, in writing. Terms are on the invoice.

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