A-3906080-AI Sleeve, Wear; Front Crankshaft Seal

One New Aftermarket Replacement Front Crankshaft Wear Sleeve for Cummins B Series Engines

This front crankshaft wear sleeve restores the sealing surface at the front of the crankshaft on Cummins B Series diesel engines (4B, 4BT, 4BTA, 6B, 6BT, 6BTA), eliminating front main oil leaks caused by a worn or grooved crank snout. The sleeve presses onto the crankshaft and provides a fresh sealing surface for the front crankshaft seal. Compatible with Cummins 3.9L (4-cylinder) and 5.9L (6-cylinder) B Series applications found in a wide range of agricultural, construction, and industrial equipment.

Compatible Models

Cummins Engine Series: 4B, 4BT 3.9, 4BTA 3.9, 6B, 6BT 5.9, 6BTA 5.9

Fits Allis Chalmers Tractors: 8745, 8765, 8775, 8785, RT95, RT115, RT130, RT145; Uni-Harvesters: 800C, 802C

Fits Case IH Tractors: 1896, 2096, 5120, 5140, 5220, 5240, 5250

Fits Case Backhoe-Loaders: 480E, 480E LL, 480F, 480F LL, 570XLT, 580K, 580L, 580 Super E, 580 Super K, 580 Super L, 590 Turbo CK, 590 Super L, 680K, 680L, 780C, 780D

Fits Case Crawlers/Dozers: 450C, 455C, 550, 550E, 550G, 650, 650G, 850D, 850E, 850G, 855D, 855E, 1150E, 1150G, 1155E

Fits Case Excavators: 688, 880D, 888, 1085B, 1085C, 1086B, 1088, 9010, 9010B, 9020, 9020B, 9030, 9030B

Fits Case Forklifts: 584E, 585E, 585G, 586E, 586G, 588G

Fits Case Skid Steer Loaders: 40XT, 75XT, 85XT, 90XT, 95XT, 1840, 1845C

Fits Case Telehandlers: 686G, 686GXR

Fits Case Wheel Loaders: 621, 621B, 621C, W11B, W14B, W14C

Fits Case Trenchers: 860

Fits Case Power Units: 4390, 4390T, 4391, 4391T, 4391TA, 6590, 6590TA, 6591T, 6591TA

Fits Case IH Windrowers: 6000, 6500, 8820, 8830, 8840, 8850

Fits Massey Ferguson: (Cummins B Series-powered models)

Versatile: (Cummins B Series-powered models)

White Tractors: (Cummins B Series-powered models)

Replaces Part Number(s):

3906080, A-3906080, A77890, J906080, 3802820, 3922598

Aftermarket Interchange Numbers

K3906080 (Reliance Power Products), FP-3906080 (FP Diesel), AMA77890 (Abilene Machine), ASI 15200

New aftermarket replacement part - not remanufactured, not used.