Caterpillar 3406E / 3456 GENERATOR SET CCB — Electronic Unit Injector - Adjust
Adjustments
For the Caterpillar 3406E / 3456 GENERATOR SET CCB, from the Caterpillar service manual.
Applies to: Caterpillar 3406E, Caterpillar 3406E / 3456 engine
Procedure
- Put the No. 1 piston at the top center position on the compression stroke.
- Use the 9U-7227 injector height gauge to obtain a dimension of 78.0 + 0.2 mm (3.07 + 0.01 inch).
- Measure from the top of the unit injector to the machined ledge of the fuel injector body.
- Turn the unit injector adjusting screw clockwise until the correct height is obtained.
- Hold the adjusting screw in this position and tighten the locknut to 100 + 10 N·m (74 + 7 lb ft).
- For cylinders 1, 2, and 4, remove the timing bolt and turn the flywheel 360 degrees in the direction of engine rotation.
- Engine rotation is counterclockwise as viewed from the flywheel end; this puts No. 1 piston at top center on the exhaust stroke.
- Repeat Steps 3 through 4.
- Remove the timing bolt from the flywheel and reinstall the valve mechanism cover.
Tools required
- 9U-7227 Injector Height Gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Unit injector height: 78.0 + 0.2 mm (3.07 + 0.01 inch)
- Locknut torque: 100 + 10 N·m (74 + 7 lb ft)
Full service-parts list: Caterpillar 3406E →, Caterpillar 3406E / 3456 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.