Cummins 4BT – Rear Seal – Replacement

Preparatory Step;
โ€ข Remove the transmission.
โ€ข Remove the flywheel.

1/8 inch Drill
Drill two holes 180 degrees apart into the seal carrier.

No. 10 Sheet Metal Screw, Slide Hammer Dent Puller
Remove the rear seal.

Caution: The seal lip and the sealing surface on the crankshaft must be free from all oil residue to prevent seal leaks.
Clean and dry the rear crankshaft sealing surface.

Install the seal pilot, provided in the replacement kit, onto the crankshaft. Push the seal onto the pilot and crankshaft.
Remove the seal pilot.

Use the alignment tool to install the seal to the correct depth in the housing. Use a hammer to drive the seal into
the housing until the alignment tools tops against the housing.
Hit the tool at 12, 3, 6 and 9 oโ€™clock positions to drive the seal evenly and to prevent bending the seal carrier.

19 mm
Install the flywheel. Tighten the capscrews in sequence as shown in the illustration.
Torque Value: 137 Nยฎm [101 ft-lb]