HOUSING 8D1657 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A(1) 9U-6198 Crankshaft Turning Tool 1
A(2) 9U-7336 Housing 1
5P-7305 Engine Turning Tool 1
B 367-8608 Engine Timing Pin 1
C 298-5564 T40 Torx Socket 1
D 227-4389 E10 Torx Socket 1
(1) The Crankshaft Turning Tool is used on the front pulley.
(2) This Tool is used in the aperture for the electric starting motor.Start By:
Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure. Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01992076
Remove plug (2) from the cylinder block. Remove O-ring seal (1) from the plug.
Use Tooling (A) in order to rotate the crankshaft so that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Position the Valve Mechanism Before Maintenance Procedures" for the correct procedure. Install Tooling (B) through Hole (W) in order to lock the crankshaft.
Remove Tooling (B).
Use Tooling (A) in order to rotate the crankshaft in a clockwise direction and position the crankshaft at 60 degrees after top dead center.
Illustration 2 g03453721
Use Tooling (C) in order to loosen threaded inserts (4) on all rocker arms (3). Unscrew threaded inserts (4) on all rocker arms (3) until all valves are fully closed. Note: Ensure that ALL threaded inserts are fully unscrewed.
Illustration 3 g03453722
Illustration 4 g03453723
Use Tooling (D) to loosen Torx screws (6). Begin at the ends of rocker shaft assembly (2) and work toward the center. Note: To avoid distortion of the rocker shaft assembly, each Torx screw should be loosened by half a turn at one time. Repeat the procedure until all Torx screws are loosened.
Remove Torx screws (6) from rocker shaft assembly (7). Note: Note Position (X) of different length Torx screws (6).
Remove rocker shaft assembly (7) from the cylinder head.
Place an identification mark on pushrods (8) in order to show the location. Remove the pushrods from the cylinder head. Note: Identification will ensure that the pushrods can be reinstalled in the original positions. Do not interchange the positions of used pushrods.
Make a temporary mark on valve bridges (5) in order to show the location and the orientation. Remove the valve bridges from the cylinder head. Note: Identification will ensure that the valve bridges can be reinstalled in the original location and the original orientation. Do not interchange the location or the orientation of used valve bridges.