Compact Excavator Final Drive Replacement Cost: Bobcat, Cat, Kubota, Takeuchi, and Komatsu

A final drive failure on a compact excavator means the machine cannot track. On a 4 to 8 ton machine running production site work, that is a full stop. The good news: compact excavator final drives are more affordable to replace than those on full-size excavators, and parts availability for common brands is solid. Here is what the job costs on the machines you see most on jobsites.

Compact Excavator Final Drive Replacement Cost

Final drive replacement on a compact excavator (roughly 1.5 to 8 metric tons) runs $1,800 to $5,500 all in. Smaller machines sit toward the lower end of that range; 7 to 8 ton excavators with larger drives sit toward the top.

Machine Class	Parts Cost	Total with Labor
Mini / compact (1.5-3.5 ton)	$900-$1,800	$1,800-$3,500
Mid-compact (4-6 ton)	$1,200-$2,500	$2,500-$4,200
Upper compact (7-8 ton)	$1,800-$3,500	$3,200-$5,500

Labor runs 4 to 8 hours depending on machine size and how much undercarriage work is needed at the same time. Final drive R&R on a compact excavator is more straightforward than on a standard excavator because the machines are lighter and the drive units are smaller. Expect 4 to 5 hours on most 3 to 5 ton machines, 6 to 8 hours on 7 to 8 ton models where the undercarriage configuration is more complex.

Get a machine-specific repair range before calling shops: EquipBook's free repair cost estimator covers final drive failures on most compact excavator models.

Cost by Brand and Model

• Bobcat E35 / E42 / E45: $1,800-$3,500 total. The E35 and E42 are among the most commonly serviced compact excavators, with strong aftermarket final drive availability from multiple suppliers. The E45 uses a slightly larger drive unit and sits toward the upper end of this range. Bobcat's rubber track format means the drive sprocket sees lower stress than steel-track machines, which generally extends final drive life.
• Caterpillar 305 / 308 / 310: $2,200-$4,500 total. Cat compact excavators use well-supported drive units. The 305 is at the lower end; the 310, at roughly 10 tons, approaches the boundary of the compact class and uses a heavier-duty drive that pushes toward the upper range. Cat dealer parts carry a premium, but quality aftermarket reman units are available at significant savings.
• Kubota KX057-4 / KX080-4 / KX040-4: $1,900-$4,000 total. Kubota compact excavators have a strong service network and solid reman market. The KX057 is one of the most common 5-ton compact excavators in North America, with multiple aftermarket final drive suppliers. The KX080, at 7.8 tons, uses a heavier drive and sits toward the top of the compact range.
• Takeuchi TB240 / TB260 / TB280FR: $2,000-$4,500 total. Takeuchi compact excavators are common on specialty jobsites and have good aftermarket parts support. The TB260 at roughly 5.9 tons is the most commonly serviced model. Takeuchi's zero-tail-swing designs sometimes have slightly longer service times due to undercarriage access configuration.
• Komatsu PC55MR / PC88MR / PC78US: $2,000-$4,500 total. Komatsu's mid-compact lineup has solid dealer coverage and aftermarket reman availability. The PC88MR at 8.2 tons is at the upper boundary of the compact class. Short-tail and zero-swing models (PC55MR-5) have good parts support across the dealer and independent channels.
• John Deere 35G / 50G / 75G: $1,900-$4,200 total. John Deere G-series compact excavators share platform components with other CNH-family machines in some cases, which supports aftermarket parts availability. The 35G is a common rental machine with well-established service records.

Signs a Compact Excavator Final Drive Is Failing

Catching a final drive problem early prevents it from becoming a track motor failure, which adds significant cost to the repair.

• One track drives slower than the other. On level ground, the machine drifts to one side when you try to track straight. This is the most common early sign of a failing final drive: the drive unit on the slow side is losing internal efficiency.
• Unusual noise from the drive motor area. A grinding or whining sound from behind the drive sprocket, especially under load, indicates internal gear wear or bearing failure. On compact excavators, the noise is often easier to hear than on larger machines.
• Metal in the final drive oil. Most compact excavator final drives have a service plug for checking the gear oil. If you drain it and find metal shavings or a thick metallic paste, the internal gears are wearing and the drive needs inspection or replacement soon.
• Leak at the drive motor or travel motor seal. Oil leaking from the final drive housing onto the track frame means a seal has failed. Driving the machine with low drive oil accelerates internal wear. A seal replacement when the leak is first noticed costs far less than a drive unit replacement after the gears run dry.
• Machine loses tracking power in one direction. If the machine pulls well going forward but struggles or drifts in reverse, or vice versa, the hydraulic motor section of the final drive may have internal wear on specific porting.

What Happens If You Wait

Compact excavator final drives that continue running with low gear oil or worn internal gears eventually seize the travel motor. A seized travel motor on a compact excavator typically requires both the final drive and the hydraulic travel motor to be replaced, doubling the repair cost. On a machine where a standalone final drive replacement runs $2,500, a combined final drive and travel motor job can run $5,000 to $7,500.

Check the gear oil in the final drive at every major service interval. It takes five minutes and is the single most effective way to catch final drive problems before they escalate.

Does the Repair Make Sense?

A 2020 Kubota KX057-4 in good condition is worth $55,000 to $70,000. A $2,800 final drive replacement is roughly 4 to 5 percent of that value. On any compact excavator under 5,000 hours with a clean frame and serviceable undercarriage, a final drive replacement makes straightforward economic sense.

On a 2013 Bobcat E45 at 6,500 hours worth $22,000 to $30,000, the math still works if the rest of the machine is solid. The question is whether the tracks, undercarriage rollers, and hydraulics are in reasonable shape. A $3,000 final drive on a machine where the tracks are also marginal and a hydraulic cylinder needs sealing is a different decision than a standalone drive failure on a well-maintained unit.

Run a free compact excavator valuation at EquipBook in under 60 seconds. Then use the free repair cost estimator to price the final drive job on your specific machine. Those two numbers together give you a clear answer before you approve the work.

See also: excavator final drive replacement cost for standard and larger machines, compact excavator engine rebuild cost, and mini excavator hydraulic pump replacement cost.