Komatsu HMV160 708-8H-00430 sluttdrev for Komatsu PC300-8 PC300-8MO gravemaskin

PC300‑8 PC300‑8MO Final Drive for Komatsu Excavator spare parts 708‑8H‑00430 207‑27‑00581 OEM

Product Overview

The PC300‑8 and its updated 8MO revision are Komatsu's 30‑to‑35‑ton production excavators — the machines you find stripping overburden in open pits, loading 40‑ton trucks on big earthworks, and pulling scrapers on major road projects. Under each track frame sits the axial piston motor and planetary reducer, covered by references 708‑8H‑00430 and 207‑27‑00581, that takes high‑pressure oil from the main pump and trades speed for the low‑speed torque dragging that much weight across rough ground.

On a machine this size, drive wear is not a subtle thing — it is felt across the whole operation. One track lags on the climb out of the pit, the track shell runs noticeably hot after a shorter run than usual, and a deepening note comes through the floor plates under load. Continuing to work scores the piston group and reduction gears further, and worn metal then circulates through the travel circuit. This OEM‑grade unit is built as one matched motor‑and‑reducer assembly, covering both the standard ‑8 and the 8MO update, so the worn drive lifts out whole and the replacement drops straight in.

Core Advantages

1. Output torque matched to a 30‑ton overburden machine
These excavators carry real weight and meet real resistance on grades and broken quarry ground. Hardened gears and piston surfaces hold the sprocket torque the tracks need to push and climb, without the laboured travel that undersized replacements produce.

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 drift, no lazy side, no hesitation when the bucket crowds the face.

3. Sealed for quarry dust and standing water
Heavy Komatsu machines work through double shifts in quarry dust, mud and standing water. Fresh shaft and housing seals keep grit out of the lube — the protection that decides whether the drive lasts its service life.

4. One complete, tested unit for a fast turnaround
Motor and reduction arrive pre‑assembled and bench‑checked, so the whole drive swaps in one operation. No sourcing separate parts, no mid‑job mismatches — critical when a stationary 30‑ton machine is losing money by the hour.

5. OEM‑spec quality at a practical repair cost
An original Komatsu final drive exchange carries a serious price. This OEM‑grade unit matches the original fit and performance at a more workable cost, with sample and bulk supply for fleets running several of these machines.

Manufacturing & Quality Control

The OEM‑grade route follows controlled specifications: material certification, precision machining of housings and gears, case hardening of wear surfaces and clean assembly. Each completed drive runs on a test rig to verify output torque, internal leakage and running noise before release, and only passing units are packed. Full preservation coating, moisture sealing and shock‑absorbing export casing protect the assembly during transport.

Frequently Asked Questions

Q1: Which reference suits my machine?
A: Read the tag on your existing drive against 708‑8H‑00430 or 207‑27‑00581 and send the machine serial number. The references cover the ‑8 and 8MO builds, so we confirm the correct unit before dispatch.

Q2: Is this the complete motor and reducer?
A: Yes — the listing covers the full axial piston motor and planetary reducer as one assembly, ready to bolt on. If you need only internal parts, ask and we will check availability.

Q3: What symptoms mean the drive needs attention?
A: Uneven track speed, pulling to one side, a hot or noisy track motor, and tracks that slip rather than pull under load. Catch it before swarf circulates through the whole travel circuit.

Q4: How does this compare to a genuine Komatsu unit?
A: It is built to the same interface and internal tolerances as a replacement, at aftermarket pricing. It will not carry a Komatsu badge, and it does not require a dealer network to fit or service.

Q5: Do you offer bulk pricing for a mining fleet?
A: Yes — workshops and mining contractors ordering multiple units get tiered pricing. Tell us how many drives you need over the year and we will quote a bulk rate.