SEAL-U-CUP 3670572 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     4C-6726     Valve Spring Compressor     1    Start By:
Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
Remove the electronic unit injector. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: The following procedure is for the removal of the inlet valve springs and the exhaust valve springs without removing the cylinder head. This procedure can be performed on only one cylinder at a time. This will prevent the inlet valves and the exhaust valves from falling into the cylinder.
Rotate the crankshaft in order to bring the piston to the top center position in the cylinder.
Illustration 1 g01019733
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.
Place the bottom portion of Tooling (A) on the cylinder head. Install hold down bolt (1) .
Install the remainder of Tooling (A) .
Tighten the nut on Tooling (A) in order to compress the inlet valve springs and the exhaust valve springs.
Remove retainer locks (3) .
Remove Tooling (A) .
Remove valve rotators (4) .
Remove inner valve spring (5) and outer valve spring (6) from each valve (2) .
Remove the bases from the cylinder head.
Install the inlet valve springs and the exhaust valve springs before you rotate the crankshaft.Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     4C-6726     Valve Spring Compressor     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Ensure that the piston is at the top center position in order to install the inlet valve springs and the exhaust valve springs.
Install the bases for the inlet valve springs and the exhaust valve springs.
Illustration 2 g01019733
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 inner valve spring (5) and outer valve spring (6) on each valve (2) .
Install valve rotators (4) .
Install Tooling (A). Install hold down bolt (1) .
Tighten the nut on Tooling (A) in order to compress the inlet valve springs and the exhaust valve springs.
Install retainer locks (3) .
Remove Tooling (A) .End By:
Install the electronic unit injector. Refer to Disassembly and Assembly, "Electronic Unit Injector - Install".
Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".