708-8F-31310 sluttdrev for Komatsu PC200-8M0 gravemaskin

PC200‑8M0 Final Drive for Komatsu Excavator spare parts 708‑8F‑31310 708‑8F‑31570 20Y‑27‑00590 Aftermarket

Product Overview

The PC200‑8M0 is the updated iteration of Komatsu's ubiquitous 20‑ton workhorse — the M0 badge marking the revised engine and hydraulic package that kept the platform competitive through the 2010s. Under each track frame sits the axial piston motor and planetary reducer, covered by references 708‑8F‑31310, 708‑8F‑31570 and 20Y‑27‑00590, that turns pump flow into the slow, steady pull moving the machine between cut and stockpile.

On a worked 20‑ton Komatsu, the drive wears down in stages that are easy to dismiss as normal. The operator notices the two tracks no longer quite match on a long haul road, that the track shell warms after a shorter trundle than it should, and that a faint whine creeps into the circuit under load. Most crews nurse it another week — but by then the piston block and reduction gears are already shedding swarf into the travel 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 bolts straight in.

Core Advantages

1. Three references, one matched drive
The three part numbers cover build variants across the M0 run. We confirm the correct unit against your machine serial number, so workshops stocking this drive can support the whole update cycle without guessing.

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 loads up.

3. Hardened gears for truck‑loading cycles
A day on a PC200 means dozens of reverses, ramp climbs and loaded pulls. Case‑hardened planetary teeth share the load across several surfaces, and controlled backlash keeps the reducer quiet.

4. Sealed for dust season and mud season alike
Whether the site is dusty topsoil or muddy clay, fresh shaft and housing seals keep grit out of the lube. That is the line between a drive that reaches its first rebuild and one that does not.

5. Drop‑in fit, same afternoon
Flange, studs and ports match the original, so the service crew swaps the whole drive rather than assembling it on the floor. A parked 20‑ton machine is a parked earner.

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: Which of the three references do I order?
A: Read the tag on your existing drive and match it against 708‑8F‑31310, 708‑8F‑31570 or 20Y‑27‑00590. Send the machine serial number and we confirm the exact variant before dispatch.

Q2: Will this fit the older PC200‑8 rather than the M0?
A: The M0 is a revised version of the ‑8, and the drive platform is closely related. Mounting and porting are usually compatible, but send the serial number and we confirm rather than assume.

Q3: What break‑in does the operator need?
A: Take the first shift easy on loaded grades. Light cycling seats the new gears and seals, then check oil level and fitting torque after the first day.

Q4: How long has this aftermarket part been on the market?
A: The PC200‑8 series has been rebuilt by the aftermarket for years, and the M0 shares the same drive architecture. Internal parts are well proven — this is not a first‑run prototype.

Q5: Can I buy just the motor cartridge if the gearbox is fine?
A: The listing is the complete assembly. If you have diagnosed only the motor side, ask about cartridges and internal kits — we can usually supply them separately.