Final drive for Komatsu PC17 PC18 mini excavator

PC17 PC18 Final Drive for Komatsu Excavator spare parts Axial Piston Motor Aftermarket

Product Overview

The Komatsu PC17 and PC18 belong to the very smallest class of excavator — machines built to squeeze through doorways, into back gardens and along narrow trench lines. Their final drives have to deliver real pulling force in a frame narrow enough for those gaps, and the axial piston motor paired with a tiny planetary reducer under each track does exactly that. On a micro machine that pivots and repositions constantly, wear in the drive shows up early: one track moves a little slower, the machine crows‑steps across flat ground, the drive housing warms after a short run, and a faint note begins inside the track frame. Because the undercarriage on a micro excavator is so cramped, reaching a failed drive is slow and awkward. This aftermarket drive is built as one matched motor‑and‑reducer unit, so the worn assembly can come off and the new one bolt straight back on without hunting for separate parts through a tight service space.

Core Advantages

1. Micro‑size output torque for tight‑space work
A 1.7‑ton machine still has to pull itself and a loaded bucket across uneven ground. A piston group finished to close clearances holds pressure internally, so both tracks push evenly instead of one lagging or slipping.

2. Quiet gearing for gardens and residential streets
Micro excavators work beside houses, in occupied buildings and on driveways. Precision‑cut, hardened reduction gears mesh cleanly and run quietly, avoiding the grinding note a worn drive produces.

3. Sealed for the wet, muddy reality of micro sites
Micro drives sit low to the ground, taking splashes of mud, water and fine dust. Fitted shaft and housing seals keep contamination out of the motor and gear oil — the protection that decides how long a cramped micro drive lasts.

4. One matched unit for an awkward repair
Because motor and reduction arrive assembled and bench‑tested, the whole drive swaps out in one go. On a micro undercarriage where space is tight, that saves bent time and avoids juggling mismatched parts.

5. Aftermarket value for a busy micro fleet
PC17s and PC18s work long hours through landscaping and utility contracts. This aftermarket drive restores track mobility at a practical cost, with sample and batch supply for workshops maintaining compact Komatsu machines.

Manufacturing & Quality Control

Each drive is built under controlled conditions: incoming material inspection, precision machining of housings and gears, hardening of wear surfaces and clean assembly. Before packing, every unit runs on a test bench to check output torque, internal leakage and running noise, and only passing assemblies are released. Preservation coating, moisture sealing and compact cushioned packing protect the drive during storage and freight.

Frequently Asked Questions

Q1: Does this drive fit both the PC17 and PC18?
A: The drive platform is shared across these micro models, but build variants can differ. Please share your machine model and serial number so we confirm the correct unit before dispatch.

Q2: Is this the complete motor and reducer?
A: Yes — it covers the full axial piston motor with planetary reduction as one assembly, ready to bolt on. Separate components can be checked on request.

Q3: What faults suggest the drive is wearing out?
A: Mismatched track speeds, crab‑walking on flat ground, a warm or noisy track motor and hesitation under load. Catch it early, before debris spreads through the small travel circuit.

Q4: What is the warranty position?
A: Manufacturing and material defects are covered. Damage from contaminated oil, debris in the motor, track obstruction, overload or incorrect installation is excluded — follow the Komatsu service manual for fitting.