IDLER AS 2406304 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5S-1330 Valve Spring Compressor 1
B 8S-2263 Spring Tester 1
C 359-4208 Valve Seat Insert Removal Tool 1
D 350-7768 Electric Hydraulic Pump Gp 1
E FT-3123 Valve Guide Driver 1
F 459-2619 Tool As 1
G 5P-0944 Dowel Puller Gp 1
H 4C-5592 Anti-Seize Compound - Start By:
Remove the cylinder head.Valve Lifters
Illustration 1 g01086846Note: Mark lifter assemblies for installation purposes.
Remove lifter assemblies (1) from cylinder head (2).
Illustration 2 g01086847
Remove lifter guide springs (3) from lifter assemblies (1).Inlet and Exhaust Valves
Illustration 3 g01086848
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Install Tooling (A) to compress valve spring (5) and valve spring (4).
Illustration 4 g01086852
Remove retainer locks (6) from valve (7).
Remove Tooling (A).
Illustration 5 g01086854
Remove rotocoil assembly (9), valve spring (5), valve spring (4), and washer (8) from valve (7).
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Remove valve (7) from cylinder head (2).
Repeat Step 1 through Step 5 to remove the remaining valves.
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Use Tooling (B) to check valve spring force. Refer to Specifications, "Cylinder Head Valves" for the correct valve spring force.Inlet and Exhaust Valve Seat Inserts
Note: Combustion surface and valve seat insert bores must be free of contaminants and debris.
When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.
Illustration 8 g02736157
Illustration 9 g02736098
Insert Tooling (C) in the bore of valve seat insert (10).
Illustration 10 g02736198
Slide the lower slide to lock Tooling (C) in place.Note: The valve seat insert may break during removal. Ensure that all fragments of the valve seat insert are removed.
Attach Tooling (D) to Tooling (C) and remove the valve seat insert (10).
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Lift Tooling (C) off the cylinder head (2) and slide the lower slide to unlock Tooling (C).
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Slide the collets of Tooling (C) and valve seat insert (10) back. Then remove valve seat insert.Inlet and Exhaust Valve Guides
Illustration 13 g02736919
Illustration 14 g02740960Note: Do not use a hammer to remove the valve guides.
Use Tooling (E) and a suitable press to remove inlet valve guides (11) and exhaust valve guides (12) from cylinder head (2).Adapter
Illustration 15 g02741080
Use Tooling (F) to remove adapter (13).
Illustration 16 g02741090
Remove O-ring seal (14) and washer (15) from adapter (13).Bridge Dowels
Illustration 17 g02741297
Use Tooling (G) to remove dowels (16) from cylinder head (2).