Most PC200-8 fuel filter problems we see are number problems, not quality problems. The machine carries two elements in series, catalogues disagree about which number belongs where, and the kit arrives with one element that threads on but does not belong. Here is the fuel side by Komatsu's published numbers, with measurements you can check yourself.
1. Two Elements, Two Numbers
Komatsu files the two positions separately: 600-319-3610 is the primary, stage-1 pre-fuel filter, and 600-319-3750 is the secondary, stage-2 main fuel filter. Both are cartridge-type elements.
| Position | OEM number | Published size | Thread / type | Interval |
|---|---|---|---|---|
| Stage 1 — pre-fuel filter / water separator | 600-319-3610 | 168 mm x 94 mm (Komatsu page) | Element assembly, housing-mounted | 500 hours |
| Stage 2 — main fuel filter | 600-319-3750 | 174-176 mm x 93-94 mm | 7/8-14 UNF-2B | 1,000 hours |
The stage-1 element does the dirty work — it catches water and coarse contamination in a housing with a drain, which is why it is scheduled at half the interval of the fine element behind it. The stage-2 filter is not built to store water: once water reaches the high-pressure pump and rail, you are no longer shopping for filters.
2. Which Machines Take Which Number
Both numbers cover the SAA4D107E/SAA6D107E engine family, but the fitment lists are not identical — the second source of wrong orders.
| Machine | 600-319-3610 (stage 1) | 600-319-3750 (stage 2) |
|---|---|---|
| PC200-8 / PC200-8M0 | Yes | Yes |
| PC210-10 / PC210-10M0 | Yes | Yes |
| PC220-8 / PC200LC-8 | Yes | Yes |
| PC160LC-8, PC170LC-10/11, PC190LC-8 | Yes | Listed by model |
| PC270-8, PC290LC-11, PC300-8, PC390LC-10 | Yes | Yes (PC300-8 on Komatsu's injector list) |
| WA200-6, WA250-6, WA430-6 loaders | Model-specific | Yes |
The table above is supplier fitment data, with one exception that carries more weight: Komatsu's own injector failure guide lists 600-319-3750 for PC200-8M0, PC210-10M0, PC220-8, PC300-8, WA200-6, WA250-6 and WA430-6. When a manufacturer names a filter in the same table as its feed pump and injectors, treat it as the number to buy.
3. The Number That Keeps Getting Sold as "PC200-8": 600-311-8321
If the box of your PC200-8 main fuel filter says 600-311-8321, you are holding a genuine Komatsu element that does not belong on this machine. Komatsu publishes it as a Main Fuel Filter — a real number, which is exactly why it spreads — but at 145 mm high; catalogues that measure it publish 147-148 mm, a 1-14 UNS thread, and applications in the six-cylinder -6/-7 generation (PC300-7/PC360-7 class, WA430-5, PC450-6K, GD655-3A).
| Figure | 600-319-3750 (PC200-8 main) | 600-311-8321 |
|---|---|---|
| Published height | 174-176 mm | 145 mm (Komatsu page); 147-148 mm in catalogues |
| Thread | 7/8-14 UNF-2B | 1-14 UNS |
| Listed applications | PC200-8/8M0, PC210-10M0, PC220-8, PC300-8, WA200-6/250-6/430-6 | PC300-7 and PC360-7 class, WA430-5, PC450-6K, GD655-3A, D375A-3 |
A 30 mm height difference and a different thread mean it will not seal on a -8 filter head, and would not filter to spec if it did. This is a correction we have made on our own site too: our earlier PC200-8 listing carried 600-311-8321 and has been rewritten. If a supplier quotes a PC200-8 fuel set without asking for the serial and the number on the old element, they are working from a fitment list, not from your machine.
4. Why It Matters More on a -8 Than on Older Machines
The SAA6D107E is a common-rail engine, where the filter no longer just protects a mechanical injection pump. Komatsu's injector failure guide lists main filter, feed pump and injectors as a set — for the PC200-8M0 that is 600-319-3750, feed pump 6754-71-1012 and injectors 6754-11-3011; the PC220-8 uses the same filter and pump with 6754-11-3102 injectors. Dirt and water that get past the filter score the plungers and injector internals, and the failure shows up as rough running, hard starting, or a machine that will not start.
Komatsu documents exactly that failure on a PC200-8: a no-start traced to injector internal leakage from contaminated fuel. The economics run one way — an element costs a fraction of a set of injectors and a feed pump.
5. Intervals That Hold Up in the Field
Komatsu's -8 schedule puts the pre-fuel filter at 500 hours, the main element at 1,000. Field amendments our fleet customers add:
- Dust, demolition or quarry work: both elements at half the interval.
- Fuel from drums or hand-filled tanks: stage-1 at half the interval regardless of hours — that is where water and grit land.
- Any water-in-fuel warning: change the stage-1 element the same day, drain the housing, and check the fuel source before the next fill.
- Long-idle machines: condensation in a part-full tank is the classic water source — change stage-1 at the service point even at low hours.
6. Cross References: What We Quote and What We Do Not
For the stage-2 element the cross list is solid: Fleetguard FF5488, Donaldson P550774 and WIX 33697 all cross to 600-319-3750. For stage-1 we publish none: catalogues disagree — Donaldson P505961 and MANN WK 940/36 x on one list, a Baldwin number against the related 600-311-3610/3620 family on another, heights from 163 mm to 168 mm. We quote the Komatsu number and verify the element.
7. Ordering Both Elements in One Message
Send three things and the order is unambiguous: machine model and serial, the numbers stamped on both old elements, and a photo of the filter head with a tape measure across it. We come back with elements, seals and a price, and ship in service-set multiples with the machine's other filters if you want one consolidated shipment. Technical detail sits on the two product pages — 600-319-3750 main fuel filter and 600-319-3610 pre-fuel filter — and the full PC200-8 filter list covers hydraulic, air and cabin filters for the same machine.
FAQ
Q: What is the main fuel filter part number for a Komatsu PC200-8?
A: 600-319-3750 is the stage-2 main fuel filter Komatsu lists for the PC200-8 and the other SAA6D107E machines (PC200-8M0, PC210-10M0, PC220-8, PC300-8, WA200-6, WA250-6, WA430-6). It replaces 600-311-3750 and is published at 174-176 mm x 93-94 mm on a 7/8-14 UNF-2B thread.
Q: What is the difference between 600-319-3750 and 600-319-3610?
A: They are two elements of the same system in different positions. 600-319-3610 is the stage-1 pre-fuel filter (Pre-Fuel Filter Assembly, 168 mm x 94 mm, changed at 500 hours); 600-319-3750 is the stage-2 main fuel filter (174-176 mm x 93-94 mm, 7/8-14 UNF-2B, changed at 1,000 hours). A PC200-8 service needs both numbers.
Q: Can I use Komatsu 600-311-8321 in my PC200-8?
A: No. It is a genuine Komatsu main fuel filter, but a different element: 145 mm in Komatsu's own listing (147-148 mm in catalogues), a 1-14 UNS thread, listed for six-cylinder -6/-7 machines such as the PC300-7/PC360-7 class, WA430-5 and PC450-6K. Some listings repeat the PC200-8 badge under this number — check the thread and height on your old element before ordering.
Q: How often do the PC200-8 fuel filters need changing?
A: On the -8 schedule published for this two-element system, the pre-fuel filter cartridge and seal sit at 500 hours and the main fuel filter at 1,000 hours. Fleets in quarry dust, demolition or high-water fuel change both at half those intervals, and change stage-1 the same day a water-in-fuel warning appears.
Need the Right Fuel Filter for Your PC200-8?
Send your machine serial and the numbers on the old elements — we confirm both positions, quote a price and arrange shipping within 24 hours.
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