Caterpillar — Final Assembly and Engine Checks
Installation · Spacers, solenoids and valve covers
From a Caterpillar service manual — check it applies to your exact model before use.
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Before you start
- Ensure proper clearance between #3 and #6 Pacbrake crossheads and the cover bases.
Procedure
- Apply clean lube oil to the terminal lead-out bushing seal ring and tighten until seated.
- Install the Pacbrake gaskets in the spacers, leaving a gap of about 1/8 inch at each end for expansion.
- Install the spacers over the base mounting studs.
- Install the Pacbrake serrated nuts and capscrews and tighten evenly to 13 lb.ft. (18 N.m).
- Install the solenoid wire on the spacer lead-out terminal.
- Start the engine and idle 5 to 10 minutes.
- Hold a clean rag over the control valve covers and depress the solenoid 5 or 6 times to purge air.
- Perform a final check for abnormal oil or fuel leaks.
- Check for interference at oil filler or breather locations; remove cover material if needed.
- Install the valve covers and torque holddown screws to 13 lb.ft. (18 N.m); relocate and install the breather pipe extension hose.
Tools required
- torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 13 lb.ft. (18 N.m)
- 1/8 inch gasket end gap
Source: Caterpillar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.