SEAL 1Y6637 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 439-3939 Link Bracket 2 Start By:
Remove the electric starting motor.
Remove the flywheel.
Support the engine.
Illustration 1 g06002548
Remove bolts (2) and rear crankshaft seal (1).
Illustration 2 g06002556
Remove bolts (4) and the washers. Remove cover (3) and the seal.
Illustration 3 g06002558
Remove gear (7), bolts (6), and gear (5).
Illustration 4 g06002564
Remove O-ring seal (8) from gear (7).
Illustration 5 g06002568
Attach Tooling (A) and a suitable lifting device to flywheel housing (9). The weight of flywheel housing (9) is approximately 135 kg (297 lb).
Remove bolts (10) and flywheel housing (9).Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 439-3939 Link Bracket 2
B - Loctite Anaerobic Flexible Gasket Maker -
C 095-0706 Bolt 2
Apply Tooling (B) to the face of the cylinder block.
Illustration 6 g06002568
Attach Tooling (A) and a suitable lifting device to flywheel housing (9). The weight of flywheel housing (9) is approximately 135 kg (297 lb). Position flywheel housing (9) on the rear of the cylinder block.
Install the washers and bolts (10).
Illustration 7 g06002564
Install O-ring seal (8) onto gear (7).
Illustration 8 g06002578
Install gear (5) and bolts (6).Note: Tooling (C) is for supporting gear (7) during the installation of the cover and the rear crankshaft seal.Note: The bolt holes in gear (7) are not symmetrical. When installing Tooling (C), check the rest of the bolts holes in gear (7) are aligned with the holes in the crankshaft.
Install gear (7) and Tooling (C).
Illustration 9 g06002581
Install cover (3), the seal, bolts (4), and the washers.
Illustration 10 g06002592
Install rear crankshaft seal (1) and bolts (2).
Remove Tooling (C).End By:
Install the flywheel.
Install the electric starting motor.