Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›Caterpillar›Electronic Unit Injector - Remove

Caterpillar 3406E — Electronic Unit Injector - Remove

Repair & overhaul

For the Caterpillar 3406E, from the Caterpillar service manual.

Applies to: Caterpillar 3406E

Before you start

  • Do not reuse the injector hold down bolts. New injector hold down bolts must be used.
  • If the injector hold down bolt is loose during the removal procedure, inspect the injector bore for wear and debris. Replace the clamp and spacer.
  • Keep all parts clean from contaminants.

Procedure

  1. Remove the rocker arms and the rocker arm shaft.
  2. Disconnect harness assembly (1) from electronic unit injector (2).
  3. Remove bridge assemblies (3).
  4. Remove bolt (4), spacer (5), and clamp (6).
  5. Place an identification mark on the electronic unit injectors for installation purposes.
  6. Use Tooling (A) to pry beneath the base and free electronic unit injector (2).
  7. Remove electronic unit injector (2) from the cylinder head.
  8. Remove O-ring seals (7) from electronic unit injector (2).
  9. Inspect electronic unit injector seat (8) and bore (9).

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Full service-parts list: Caterpillar 3406E →

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.

More Caterpillar repair guides →