Caterpillar — Engine Preparation
Installation · Caterpillar 3406 engine
From a Caterpillar service manual — check it applies to your exact model before use.
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Procedure
- Thoroughly clean the top of the engine, and remove the crossover pipe and rocker covers.
- Loosen and remove the fuel lines, placing them in a protective bag.
- Loosen the intake and exhaust rocker arm adjusting screw lock-nuts.
- Remove the front rocker shaft group; remove no more than three rocker assembly head bolts at one time.
- For engines prior to serial 7FB-39279, measure the two end pedestals; if more than .005 difference, machine the higher pedestal or use shims.
- Replace Caterpillar exhaust rocker arm adjusting screws with hardened hexhead Pacbrake screws; reuse Caterpillar lock-nuts.
- Remove exhaust valve crossheads; transfer adjusting screws and locknuts into the Pacbrake crosshead.
Tools required
- vernier caliper or micrometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- .005 in max pedestal height difference
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.