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Engine Oil Pump Compatible With Cummins Qsb 5.9/Qsb 6.7 1989-1998 6Bt 5.9L Diesel (Isb 5.9)

C4939587A2
OEM PART NUMBERS:
• Cummins: 4939587 (Primary OEM number for ISB & QSB)
• Cummins: 3901175 (Superseded number)
• Cummins: 3906414 (Cross-reference)
• Cummins: 3914006 (Cross-reference)
• Cummins: 3914008 (Cross-reference)
• Cummins: 3924720 (Superseded number)
• Cummins: 3926203 (Cross-reference)
• Cummins: 3937404 (Cross-reference)
• Cummins: 3941742 (Cross-reference)

SPECIFICATIONS:
• Drive Type: Gear-driven
• Gear Type: Helical Gears
• Mounting Style: Direct engine mount
• Engine Family: ISB/QSB
• Displacement: 5.9L
• Condition: New

APPLICATION:
• Compatible with Cummins 6BT/6BTA (1989-1998)
• Compatible with Cummins ISB 5.9/ISB 6.7 (1989-1998)
• Compatible with Cummins QSB 5.9/QSB 6.7 (1989-1998)
• Compatible with Dodge 1989-2002 models (1989-2002)

PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.

WARNING - This product may expose you to chemicals such as Nickel which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Was: $360.66
Sale: $206.09
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Description

CUMMINS B SERIES ENGINES:
• Cummins 6BT/6BTA 6BT 5.9L Diesel (1989-1998)
• Cummins ISB 5.9/ISB 6.7 ISB 5.9L / 6.7L Diesel (1989-1998)
• Cummins QSB 5.9/QSB 6.7 QSB 5.9L / 6.7L Diesel (1989-1998)

DODGE RAM TRUCKS:
• Dodge 1989-2002 models 5.9L Cummins Diesel (1989-2002)


IMPORTANT:
Oil pump for Cummins 6BT/6BTA/ISB/QSB 5.9L AND 6.7L — same pump fits both displacements. Supersedes 3901175, 3906414, 3914006, 3914008. Gear-driven gerotor with 30mm thick gears.

Used in Dodge Ram trucks (1989-2002 with 5.9L), Case IH equipment, and numerous industrial/marine OEMs. Do NOT confuse with 4988801 (ISB front gear train version for 2003+ Dodge trucks) or 3926203/3926202 (earlier B-series variants). The 6BT (mechanical, 12-valve) and ISB (electronic) use the same pump but different mounting configurations. Failure symptoms: low idle pressure, bearing knock, pressure gauge fluctuation.

⚠️ Fits 5.9L and 6.7L B-series. Verify pump mounting matches your engine build.

Details

Shipping Information

  • Item Requires Shipping
  • 3.8 lbs.
  • W6.0000” x H5.0000” x L8.0000”
  • Free Shipping!

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