CAT 320D болон PC200-ийн тос, түлш, гидравлик болон агаарын шүүлтүүрийг харьцуулан шалгах
This article explains how to cross-reference excavator service filter kits using OEM part numbers. A complete kit usually includes engine oil filter, fuel filter or water separator, hydraulic return filter, hydraulic suction filter, pilot filter, primary air filter and safety air filter. For CAT 320D, typical references include 1R-0739 oil filter, 1R-0751 fuel filter, 326-1644 water separator, 179-9806 hydraulic return filter, 5I-8670 pilot filter and 131-8822 / 131-8821 air filters. For KOMATSU PC200-7 and PC200-8, Komatsu numbers can be crossed to Donaldson or Fleetguard equivalents. Buyers should verify machine generation, engine model, thread size, seal diameter, micron rating and bypass valve setting instead of ordering only by machine tonnage.
Filters are where “close enough” gets expensive. Two filters may look the same but have different bypass pressure, seal face or thread, causing pump wear or injector contamination.
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> 320D (C6.4), 320D2 (C7.1) and 320E (C7.1) do not share the same filtration specification, so the serial number and engine arrangement must be checked first.
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> A cross number means “similar filtration application”, not automatically identical thread, gasket, bypass pressure and temperature rating.
1. Machine model + generation（320D / 320D2 / PC200-7 / PC200-8）
2. Engine model（C6.4 / C6.6 / 6D102 / 6D107）
3. Old filter OEM number
4. Thread, seal OD and overall length
5. Micron rating and bypass valve setting
6. Whether kit includes safety, suction and pilot filters
We build a service filter kit per machine: oil + fuel + hydraulic + air + pilot in one list. Before shipment we send old-vs-new number photos. For Kazakhstan, Uzbekistan and Russia, we can propose Donaldson, Fleetguard, Mann or Hengst-class alternatives, clearly marked as “OE-spec cross” or “genuine-spec equivalent”.
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