Caterpillar C-3406B / C-346 — Master Piston Maintenance
Maintenance
For the Caterpillar C-3406B / C-346, from the Caterpillar service manual.
Browse Caterpillar generators & specs →
Before you start
- Never remove any engine brake component with the engine running; personal injury may result.
Procedure
- Remove the button head screw, washer and master piston spring from the brake housing.
- Remove the master piston from its bore; needle nose pliers are usually needed to initially pull the piston up.
- If binding occurs, check for burrs or contaminants in the lube oil; clean in an approved solvent.
- Inspect the hard surface; replace pitted, chipped, cracked or galled pistons.
- Reassemble in reverse order; make certain the two spring tabs do not interfere with the sides of the master piston center raised portion.
Tools required
- Needle nose pliers Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.