PISTON 4790665 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 138-8440 Component Cleaner 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g00886209
Remove engine oil filler cap (if equipped).
Remove bolts (1) and washers (2) from valve mechanism cover (3).
Remove valve mechanism cover (3) and gasket (4).
Clean valve mechanism cover (3) with Tooling (A). Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
B 154-8874 Adhesive Kit 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g00886209Note: For later valve cover gaskets which have a rubber bead on one side, no adhesive is required. The gasket is designed to be installed dry.
Apply adhesive to valve mechanism cover (3) with Tooling (B).
Install new gasket (4) and valve mechanism cover (3).
Install washers (2) and bolts (1).
Illustration 3 g00611545
Tightening sequence for the engine valve covers
(A) Rear
(B) Front
Tighten the bolts in sequence to a torque of 12 3 N m (106 27 lb in).
Install engine oil filler cap (if equipped).