Caterpillar 3406C Marine Engine — Install Fuel Injection Pumps
Repair & overhaul
For the Caterpillar 3406C Marine Engine, from the Caterpillar service manual.
Applies to: Caterpillar 3406C engine
Procedure
- Install spacers (2) in the fuel pump housing.
- Move the rack until Tool (A) can be installed to hold the rack in the center position.
- Install a fuel pump without its spring so that Tool (C) can be installed.
- Install Tool (B) on the bonnet of the fuel pump.
- Install the fuel pump with the gear slot in alignment with the small pin and the barrel groove with the large pin.
- Install the seal and bushing (6) on the fuel pump.
- Lower the tooling handle slowly; do not use force if it will not go down.
- Tighten bushing (6) to 220 ± 15 N·m (160 ± 11 lb ft).
- Check total rack travel; it must be approximately 19.7 mm (.78 in).
Tools required
- 6V4186 Timing Pin Amazon
- 8S2244 Extractor Amazon
- 6V7050 Compressor Group Amazon
- 6V6106 Dial Indicator Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 220 ± 15 N·m (160 ± 11 lb ft)
- rack travel approximately 19.7 mm (.78 in)
Full service-parts list: Caterpillar 3406C engine →
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.