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Front Crankshaft Wear Sleeve Compatible With Cummins 4Bt3.9/6Bt5.9/6Bta5.9 1984-2007 B Series

C3906080A1
OEM PART NUMBERS:
• Cummins: 3906080 (Primary OEM - front wear sleeve)

SPECIFICATIONS:
• Finish: Finished
• Material: Steel
• Condition: New

APPLICATION:
• Compatible with Cummins 4BT3.9/6BT5.9/6BTA5.9 (1984-2007)
• Compatible with Cummins 6CT8.3/6CTA8.3 (1985-2000)

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 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: $180.88
Sale: $103.36
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Description

CUMMINS B SERIES:
• Cummins 4BT3.9/6BT5.9/6BTA5.9 B Series 3.9L/5.9L Diesel (1984-2007)

CUMMINS C SERIES:
• Cummins 6CT8.3/6CTA8.3 C Series 8.3L Diesel (1985-2000)


IMPORTANT:
This is a FRONT crankshaft wear sleeve for Cummins B Series (4BT 3.9L / 6BT 5.9L) AND C Series (6CT/6CTA 8.3L) engines — NOT a cylinder liner. It provides a fresh sealing surface for the front crankshaft seal. Common reason for replacement: front oil leak from a groove worn into the crank by the seal lip. A new seal on a grooved surface will leak again — the wear sleeve is needed. Do NOT confuse with the REAR wear sleeve (3906081) or with 3908277 (6C-specific front sleeve). Verify which part number your engine service manual calls for. Must be pressed onto the crankshaft with proper tooling. Always install a new front seal at the same time.

⚠️ Front wear sleeve — verify front vs rear position and engine family before ordering.

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  • Item Requires Shipping
  • 0.5 lbs.
  • W5.0000” x H6.0000” x L5.0000”
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