## Diesel Engine Management System

#### Injector Spray Condition Check

11-152

Special tool required Injector test harness 5-8840-7010-0

1. Remove all injectors (see page 11-155).

1. Set an injector to a nozzle tester (A) and nozzle holder (B).

1. Connect the injector test harness to the injector and battery.

1. Observe the fuel pressure indicated by the fuel pressure gauge with the fuel pump running.

1. Operate the fuel pump running at about 40,000 kPa (410 kgf/cm2, 5,800 psi) and then immediately use the injector switch box to command the fuel pump ON.

WARNING

- Test fluid from the nozzle tester will spray out of the injector under great pressure.
- It can easily puncture a person's skin.
- Keep your hands away from the injector at all times.

1. Check the spray condition.

   If the spray condition is bad, the injector must be replaced or reconditioned.

- Correct (A)
- Incorrect (Restrictions) (B)
- Incorrect (Dripping) (C)

a a a