Komatsu PC200-7 Fuel Filter 600-311-9121

Fitment and Service Notes

The 600-311-9121 belongs to the -6/-7 generation of Komatsu's 20-tonne class — the machines built around the SAA6D102E engine era — where it serves as the fuel filter with a built-in water separator. Aftermarket fitment lists cover the PC200-6/7, PC220-6/7, PC300-7, PC350-7 and PC360-7 excavators with it, and the same element family appears on WA150-5/WA250/WA380 wheel loaders and GD555-3A/GD655-3A graders. If your machine is a newer PC200-8 (SAA6D107E engine era), stop here: the -8 series runs a different fuel system with the 600-311-8321 main fuel filter — our PC200-7 vs PC200-8 parts guide explains which service parts carry across the two generations and which do not.

Water is the reason this filter matters. A -7-generation Komatsu working a humid site or storing fuel in drums picks up water in the tank, and if that water reaches the injection pump it costs more than the machine's entire filter bill for a year. The 600-311-9121's job is to catch it first: drain the separator bowl at every service and change the element on the service schedule rather than on symptoms. Because sellers also list the 600-311-9120 and 600-311-8281 numbers for the same machines, the reliable way to order is the number stamped on your old element plus your machine serial — we confirm the exact unit against both before anything ships.

This element completes the fuel side of our Komatsu PC200 filter range: hydraulic filter 207-60-71181 (shared across the -7 and -8 generations), return filter 20Y-60-41130, suction strainer 20Y-60-31140, air filter 600-185-4100 and the -8-series main fuel filter 600-311-8321. For Komatsu part-number basics and ordering, see the Komatsu part number guide and the OEM heavy equipment parts buyer's guide.

FAQ

Q: What is the Komatsu 600-311-9121 fuel filter?
A: It is the spin-on fuel filter element with a built-in water separator for Komatsu's -6/-7 generation excavators — listed for the PC200-6/7, PC220-6/7, PC300-7, PC350-7 and PC360-7, plus WA150-5/WA250/WA380 loaders and GD555-3A/GD655-3A graders on aftermarket fitment lists (September 2026). It sits between the fuel tank and the injection pump and removes water and dirt from the diesel.

Q: Does the 600-311-9121 fit a Komatsu PC200-8?
A: No — the PC200-8 series runs a different fuel system and lists the 600-311-8321 main fuel filter instead. If you are not sure which generation your machine is, send the serial and the number on the old filter and we confirm the exact element before dispatch.

Q: What aftermarket filters cross-reference to 600-311-9121?
A: Aftermarket listings cross-reference it to Fleetguard FF5076 and Donaldson P557440, and list 600-311-9120 and 600-311-8281 alongside it for the same machines. Cross-reference lists differ between suppliers — confirm the physical fit against the filter base on your machine.

Q: Is this fuel filter OEM or aftermarket, and how do I order it?
A: This is a high-quality aftermarket fuel filter / water separator cross-referenced to Komatsu OEM 600-311-9121, typically priced 30–60% below OEM list. Message us on WhatsApp or email sales@cn-machinery.com with your machine model, serial and the number on your old filter — stock items dispatch in 3–7 days, FOB Shanghai or CIF to your port.