3056E Industrial Engine Caterpillar

Crankshaft Front Seal

Depth of the crankshaft front seal from the front face of the oil seal housing ... 10.20 to 10.70 mm (0.402 to 0.421 inch)

Crankshaft Rear Seal

A new crankshaft rear seal has a plastic sleeve inside the seal. The plastic sleeve is used to protect the seal. The plastic sleeve is also used to assemble the seal to the engine. The seal must be aligned to the engine. Use the alignment tool Ft-2806.

Illustration 1	g00955880
The sequence for the rear oil seal

(1) Tighten the bolts in the numerical sequence that is shown in illustration 1. Tighten the bolts to the following torque. ... 22 N·m (16 lb ft)

Wear Sleeve

Illustration 2	g00886912
The flange for the crankshaft wear sleeve

Note: If the crankshaft flange has a wear groove, use a 209-8228 Sleeve to renew the sealing surface before the housing assembly is installed.

(2) The gap between the wear sleeve and the cylinder block is the following distance. ... 0.4 to 0.6 mm (0.016 to 0.024 inch)

(3) Apply a continuous bead of 138-8436 Liquid Gasket around the inner surface of the wear sleeve. ... 5 mm (0.20 inch)

(4) Crankshaft

(5) Wear sleeve installation tool