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Diesel Oil Pumps

Diesel oil pumps move oil through your engine and hold the pressure that keeps bearings, the turbo, and valvetrain alive. JAK'S Diesel stocks replacement oil pumps for heavy-duty and Class 8 diesel engines — with coverage across Caterpillar, Cummins, Mack, and Detroit platforms — led by PAI Industries aftermarket units cross-referenced to OEM and superseded numbers.

Not sure which pump fits your block or whether yours is the cause of a low-pressure code? Send us your engine details and part numbers and we'll confirm fitment before you buy. Most in-stock orders ship same day, with free freight on orders over $1,000.

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Choosing the Right Diesel Oil Pumps

Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.

Fitment information to have ready

  • OEM, dealer, casting, or interchange part number
  • Engine manufacturer, model, and engine serial number (ESN)
  • Truck year and model when the component is chassis-specific
  • Core details for remanufactured or exchange components

Need a fitment check?

Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.

Can't Find the Right Part?

Text us the part number or a photo of the tag — we'll cross-reference it and quote you the right one.

Text a Part-Tag Photo(720) 445-6249