TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ENGINE CRANKS BUT FAILS TO START ABOVE 50°F (18°C) - CONTINUED
CAUTION
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 7
Check AIR CLEANER VACUUM gage (1) reading as follows: Rotate KEY SWITCH (2) clockwise
to on position and press ENGINE START button (3) for 20 seconds. Check for less than 25
inches of water on AIR CLEANER VACUUM gage (1). Rotate KEY SWITCH (2) counterclockwise
to off position.
a
If AIR CLEANER VACUUM gage (1) reading is more than 25 inches of
water, replace air cleaner element (page 2-452).
b
If AIR CLEANER VACUUM gage (1) reading is less than 25 inches of
water, notify Direct Support Maintenance.
WARNING
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
equipment.
Step 8
Check fuel solenoid (4) for 11 to 13 vdc as follows: Set multimeter to 20 vdc scale. Connect red
test lead to fuel solenoid terminal stud (5) and black test lead to ground. Have assistant rotate
KEY SWITCH (2) clockwise to on position and press ENGINE START button (3) for 1 second.
Check for 11 to 13 volts on multimeter. Have assistant rotate KEY SWITCH (2) counterclockwise
to off position. Disconnect test leads.
a.
If multimeter reads no voltage, go to step 9.
b.
If multimeter reads 11 to 13 volts, fuel solenoid (4) must be replaced. Notify Direct
Support Maintenance.
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