ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
2. ENGINE CRANKS BUT FAILS TO START ABOVE 50F (18°C).
Diesel fuel burns easily. Do not smoke or allow flames nearby. Disconnect batteries when
working on fuel system. Failure to observe these precautions could cause serious injury to
Do not crank engine for more than 20 seconds. Allow starter motor to cool for 2 minutes
between cranking attempts. Cranking too long can overheat and damage starter motor.
Step 1. Unscrew and take off filler cap (1) and check fuel level in front fuel tank (2).
If fuel level is low, fill and prime fuel system (page 2-77).
b. If fuel level is sufficient, go to step 2.
Step 2. Check fuel in front fuel tank (2) for water or dirt contamination.
If fuel is contaminated, drain and fill front and rear fuel tanks (2 and 3),
replace primary fuel filter (4) (page 2-466), secondary fuel filter (5) (page
2-476), and fuel pump fuel filter (6) (page 2-477). Prime fuel system
If fuel is not contaminated, install filler cap (1) and go to step 3.
Step 3. Turn manual override thumbscrew (7) on fuel solenoid (8) fully clockwise to stop.
Rotate KEY SWITCH (9) clockwise to on position and press ENGINE START
button (10) for 15 seconds.