3406E Truck Engines Caterpillar

Illustration 1	g00960341

Note: Refer to Special Instruction, SMHS8508, "Special Handling Information and Installation Instructions for Crankshaft Seal Groups That Have Hydrodynamic Grooves In the Sealing Lip" in order to find the correct procedure for installing the front and the rear seals.

Note: Do not separate the seal from the sleeve. If the seal is separated from the sleeve, the seal must be replaced.

(1) Front crankshaft seal

During installation, the seal driver should not contact the seal within the following diameter. ... 177.80 ± 0.25 mm (7.000 ± 0.010 inch)

After installation, the face of the seal's wear sleeve should be flush with the front face of the crankshaft with the following tolerance. ... -0.13 to 0.13 mm (-0.005 to 0.005 inch)

After installation, the front face of the seal's casing should be within the following dimension from the front face of the crankshaft. ... 5.28 + 0.00 - 0.60 mm (0.208 + 0.000 - 0.024 inch)

After installation, the face of the seal's casing must be parallel with the front face of the crankshaft within the following tolerance. ... ± 0.13 mm (± 0.005 inch)

(2) Rear crankshaft seal

During installation, the seal driver should not contact the seal within the following diameter. ... 177.80 ± 0.25 mm (7.000 ± 0.010 inch)

After installation, the face of the seal's wear sleeve should be within the following dimension from the rear face of the crankshaft. ... 1.5 ± 0.5 mm (0.06 ± 0.02 inch)

After installation, the face of the seal's casing should be within the following dimension from the rear face of the crankshaft. ... 6.4 + 0.0 - 0.6 mm (0.25 + 0.00 - 0.03 inch)

After installation, the face of the seal's casing must be parallel with the rear face of the crankshaft within the following tolerance. ... ± 0.13 mm (± 0.005 inch)