WASHER-HARD 4512176 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00863076
Remove breather assembly (1) from valve mechanism cover (2) .
Remove the bolts that hold the valve mechanism cover (2) to the valve cover base (3) .
Remove the seal from the valve mechanism cover.Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g00863076
Illustration 3 g00786705
Bolt tightening sequence for the valve mechanism cover (A) Rear (B) Front
Position the valve mechanism cover (2) and the seal on valve cover base (3). Cut the seal to length. Apply 4C-9612 Silicone Sealant on both sides of the seal joint.
Install the bolts. Tighten the bolts in a numerical sequence to a torque of 12 3 N m (106 27 lb in).Note: Inspect the O-ring seal of the breather assembly. Replace the O-ring seal, if necessary.
Position breather assembly (1) on valve mechanism cover (1). Tighten the bolt for breather assembly (1) to a torque of 7 2 N m (62 18 lb in).