PIN 6Y6751 - Caterpillar

Disassembly Procedure
Start By:
Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove".Inlet and Exhaust Valves
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5S-1330 Valve Spring Compressor 1
B 441-0714 Tool As 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g00598108
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Illustration 2 g00618922
Use Tooling (A) to compress valve spring (1).
Remove retainer lock (2).
Remove Tooling (A). Remove the valve rotator and spring (1).
Remove valve rotator (3), outer spring (5), inner spring (4), and seal (6).Note: Place an identification mark on valves (7) for the assembly procedure.
Illustration 3 g00598111
Check the valve spring force with Tooling (B). Refer to the Specifications Module for the correct spring force values.
Repeat Steps 1 through 5 for the remaining valves.Valve Train
Table 2
Required Tools
Tool Part Number Part Description Qty
C 5P-0944 Dowel Puller Group 1
5P-0942 Dowel Extractor 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 4 g01051069
Use Tooling (C) to remove bridge dowel (1) from the cylinder head.Inlet and Exhaust Valve Seat Inserts
Table 3
Required Tools
Tool Part Number Part Description Qty
D 166-7441 Valve Seat Extractor 1
165-5647 Valve Seat Extractor 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 5 g01354109
Use Tooling (D) to remove the valve seat inserts from the cylinder head.
Thoroughly clean the valve seat bores.Inlet and Exhaust Valve Guides
Table 4
Required Tools
Tool Part Number Part Description Qty
E 7M-3975 Valve Guide Driver 1
5P-1729 Valve Guide Bushing 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 6 g01354112
Use Tooling (E) and a hammer to remove the valve guides from the cylinder head.Valve Lifters
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: The valve lifters may also be removed with the cylinder head on the engine. Remove the camshaft and use the following steps to remove the valve lifters with the cylinder head on the engine.
Illustration 7 g01354290
Pull valve lifter (9) out of the cylinder head.
Illustration 8 g01051073
Remove guide spring (10) from the valve lifter.