+ applicable tax
Your excavator is parked. One side won't track, the arm swings but the machine won't move, or you're hearing a grinding howl from the undercarriage every time you try to travel. A failed final drive on a 2-ton excavator is a job-site emergency — and watching the Bobcat dealer quote you $3,625.99 for the replacement makes it worse. Whether you're an owner-operator losing billing hours or a fleet shop that needs to turn this machine fast, you don't have to pay dealer prices.
This is an OEM-specification complete final drive assembly for the Bobcat E19, E20, and E20Z — and the Doosan DX17Z, which uses the identical unit. Pre-filled with gear oil, fully assembled, and engineered to the same hydraulic specifications as the factory unit. Drop it in, connect the hoses, and track.
This is not just a hydraulic motor or just a gearbox. It is the complete final drive assembly:
Here is something most aftermarket suppliers miss: Bobcat and Doosan operate under the same corporate umbrella (Doosan Bobcat / HD Hyundai) and share engineered components across their compact excavator lines. The Doosan DX17Z uses the exact same final drive unit as the Bobcat E20 — identical motor, identical gearbox, identical port configuration, identical mounting flange. The only difference is the OEM part number printed on the dealer invoice.
Doosan DX17Z operators frequently struggle to find aftermarket final drives because most aftermarket listings are catalogued exclusively under the Bobcat part number. This listing fits the DX17Z.
The Bobcat E20 is a 2-speed machine — it has a fast "Rabbit" mode for tramming across job sites and a slow high-torque "Turtle" mode for digging and precise tracking. Not all aftermarket final drives are 2-speed. A single-speed replacement will cause the machine to track erratically and will not support the factory speed-switching function.
This unit is the 2-speed version. Confirm this before installation — the 2-speed internal valve mechanism is identifiable by the presence of a small pilot port on the motor body (the speed-shift port). If your replacement does not have this port, it is a single-speed unit.
⚠️ Always verify via your machine serial number before ordering. The E19/E20 line had minor production changes across serial number breaks that may affect the exact port configuration. Check the data plate on your existing motor before ordering, or contact us with your machine serial number for confirmation.
Does this fit the Doosan DX17Z?
Yes. The Doosan DX17Z uses the same final drive unit as the Bobcat E20. Bobcat and Doosan share engineering and hydraulic components within the compact excavator class due to their shared corporate parent (Doosan Bobcat). Part number 7329742 covers both machines.
Do I need to return my old unit (core)?
No core return required. This is an outright sale — keep or dispose of your old unit however you choose.
Will this work if only one side failed?
Yes, you can replace just one final drive. However, if one side has failed from wear or contamination (rather than a specific incident like hose rupture or debris ingestion), inspect the opposite side carefully — a second failure within months is common when both units have the same wear history.
How do I know if I need this vs. just a hydraulic motor or just a gearbox?
If your machine tracks slowly or in one speed only, but still moves: likely a motor internal issue. If there is a loud grinding noise: likely gearbox failure. If there is no movement at all: could be motor, gearbox, or hydraulic supply. In most cases, replacing the complete assembly is more cost-effective than attempting individual component repair, as matched motor/gearbox wear is common.
How long does installation take?
An experienced excavator mechanic can complete this swap in 2–4 hours. The job involves: removing the rubber track, pulling the sprocket, disconnecting four hydraulic hoses, unbolting the drive from the frame, reversing the process with the new unit, and bleeding/testing the system.
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