Komatsu PC270 油圧ショベルのための708-8H-00320 ファイナルドライブ

PC270 Final Drive for Komatsu Excavator spare parts 708‑8H‑00320 Axial Piston Motor Aftermarket

Product Overview

The Komatsu PC270 is the standard‑undercarriage sibling to the longer LC — a 27‑ton excavator built for general earthworks, quarry face work and large‑site grading where manoeuvrability matters as much as pulling power. Under each track frame sits the axial piston motor and planetary reducer, reference 708‑8H‑00320, that takes high‑pressure oil from the main pump and trades speed for the low‑speed torque dragging the machine across rutted, broken ground.

On a worked PC270, the drive wears down in ways that are easy to miss until they are not. The operator notices one track lags on the ramp climb, that the track shell warms after a shorter trundle than it should, and that a deepening note comes through the floor under load. Waiting until a track actually slips is waiting for the piston block to shed swarf into the oil. This aftermarket unit reproduces the original motor‑and‑reducer pairing as one sealed, bench‑run assembly, so the worn drive lifts out whole and the new one drops straight in.

Core Advantages

1. Torque to pull a 27‑ton frame on quarry faces
Hardened gear stages multiply motor output down to sprocket speed, so the track digs in rather than spinning on loose rock. No laboured, whirring travel under a full bucket.

2. A lapped piston group that holds pressure
The cylinder block, piston shoes and valve plate are finished to close clearance, so oil pressure does not bleed internally. Both tracks pull in step — no wander on the haul road, no lazy side.

3. Hardened gears for decades‑proven Komatsu duty
The planetary gear set follows a long‑proven layout, with case‑hardened teeth that share the drive load evenly. Meshing stays smooth and quiet, and wear from years of ramp climbs slows right down.

4. Sealed for quarry dust and standing water
Heavy Komatsu machines work through long shifts in dust, mud and water. Fresh shaft and housing seals keep grit out of the lube — the line between a drive that lasts and one that fails early.

5. Aftermarket price for a high‑hour machine
An OEM exchange drive carries a premium that is hard to justify on a worked PC270. This unit restores full track mobility at a fraction of that cost, with sample and bulk supply available.

Manufacturing & Quality Control

Parts are machined to Komatsu print, heat‑treated at wear points, and assembled in a clean shop. Each finished drive runs on a hydraulic stand while torque, leakage and noise are logged; units outside spec are reworked before packing. The internals are fogged with preservation oil, ports are plugged, and the assembly ships on shock‑absorbing dunnage.

Frequently Asked Questions

Q1: Is this the same drive as the PC270LC‑8?
A: The standard PC270 and the long‑undercarriage LC use related but not always identical drives. Part numbers differ — 708‑8H‑00320 here versus the LC references. Send the serial number and we confirm.

Q2: Can I reuse my existing sprocket?
A: Usually yes — the sprocket transfers over from the old drive. If yours is hooked or worn thin, ask and we will quote a fresh one at the same time to save on freight.

Q3: What oil change interval do you recommend after fitting?
A: Replace the travel gear oil after the first 50 hours to flush break‑in debris, then follow the Komatsu service schedule. Keep an eye on the oil for the first month — any metal shine means stop and inspect.

Q4: Do you ship to landlocked African countries?
A: Yes — we ship to major ports and can arrange onward trucking to inland destinations. Tell us the nearest port or the city itself and we will quote door‑to‑port or door‑to‑door.

Q5: What is the minimum order quantity?
A: There is no minimum — we supply single units to workshops and owner‑operators. Bulk buyers get tiered pricing, so tell us if you want several units over the year.