SHAFT AS. 1U7794 - Caterpillar

Illustration 1 g03742444
Type B Wet Back-End Housing
Illustration 2 g03742608
Type B Wet Back-End Housing
Remove bolts (2) from Positions (X) in flywheel housing (3).
Install Tooling (A) into Position (X) to flywheel housing (3).
Install a suitable lifting device onto flywheel housing (3) to support the flywheel housing. The weight of the flywheel housing is approximately 40 kg (88 lb).
Remove remaining bolts (2) from flywheel housing (3).
Remove bolts (1) and bolts (4) from flywheel housing (3).
Use the lifting device to remove flywheel housing (3) from the cylinder block.
Illustration 3 g03742576
Typical example
Illustration 4 g03742617
Typical example
Remove dust seal (6).
If equipped, remove gasket (7).
If necessary, remove dowels (5) from the cylinder block.
If equipped, remove oil seal (8) from flywheel housing (3).Installation Procedure of Type B Wet Back-End Housing
Table 2
Required Tools
Tool Part Number Part Description Qty
A - Guide Studs M10 by 100 mm 2
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that the flywheel housing is clean and free from damage. If necessary, replace the flywheel housing.Ensure that the crankshaft palm is free from oil and grease.
Illustration 5 g06064666
Areas that require paint removal
Illustration 6 g06057976
Typical example
Illustration 7 g06057973
Positions for Tooling (A).
Remove the paint from the machined area in Positions (Y) shown in Illustration 5.
Install a new oil seal (8) to flywheel housing (3).Note: Press the oil seal into the flywheel housing from the rear. Ensure that the front edge of the oil seal is flush with the gasket surface of the flywheel housing.
Inspect the crankshaft rear seal for leaks. If there are any oil leaks, replace the crankshaft rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal - Remove" and refer to Disassembly and Assembly, "Crankshaft Rear Seal - Install" for the correct procedures.
Clean the rear face of the cylinder block. If necessary, install dowels (5) to the cylinder block.
Install Tooling (A) in Positions (X) to the cylinder block.
If necessary, install new gasket (7) onto Tooling (A).
Install new dust seal (6).
Illustration 8 g06057987
Type B flywheel housing
Bolts (1) are 16 mm
Bolts (2) are 10 mm
Bolts (4) are 12 mm
Illustration 9 g06058009
Tightening sequence of Type B flywheel housing
Ensure that bolts (1), bolts (2) and bolts (4) are clean and free from oil or grease. Ensure that all threaded holes in the cylinder block are clean and free from oil or grease.The threads of the bolts and the threads in the cylinder block must be clean and dry to prevent too higher torque being applied.
Install a suitable lifting device onto the flywheel housing. The weight of the flywheel housing is approximately 40 kg (88 lb).
Use the lifting device to align flywheel housing (3) with Tooling (A). Install the flywheel housing to the cylinder block.
Install bolts (1), bolts (2) and bolts (4).
Remove Tooling (A). Install remaining bolts (2).
Follow Step 14.a through Step 14.c to tighten bolts (1), bolts (2) and bolts (4) in the tightening sequence that is shown in Illustration 9.
Tighten bolts (1) to a torque of 260 N m (192 lb ft).
Tighten bolts (2) to a torque of 63 N m (46 lb ft).
Tighten bolts (4) to a