CHECK VALVE

Name: 2821915 - CHECK VALVE
Brand: Caterpillar
SKU: 2821915
Price: 106.47 USD
Availability: InStock

This is a check valve used in the fuel system of many Caterpillar diesel engines and equipment. It is a one‑way valve that allows fuel to flow in only one direction, preventing backflow and maintaining proper fuel pressure to the high‑pressure injection pump. You typically replace it when there are symptoms like hard starting, fuel pressure fluctuations, or fuel draining back from the filter housing, which can indicate a stuck or weak internal poppet. It is part of the fuel filter lines group (126‑7291) and mounts in the low‑pressure fuel circuit before the injection pump.

$106.47

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Caterpillar 3406E, 3412E, 3408E engine applications
Caterpillar 24H Motor Grader
Caterpillar 5110B Excavator
Caterpillar 631D, 631E, 631G, 633E II, 637E, 637G, 651E, 657E Scrapers
Caterpillar 769C, 769D, 771D, 773B, 773D, 773E, 775B, 775D, 775E Off-Highway Trucks
Caterpillar 836 Landfill Compactor
Caterpillar 844 Wheel Dozer
Caterpillar 988B, 988F II, 990, 990 II, 992C Wheel Loaders
Caterpillar AD45 Underground Truck
Caterpillar AE40 II, C30 Marine/Industrial engines
Caterpillar PM-565B Cold Planer (3408E engine)

This is a fuel system check valve, not an air system part despite some cataloging. It is installed in the fuel filter lines group and only fits the Caterpillar machines and engines listed.