Any trouble beyond scope of organizational
maintenance personnel shall be reported to direct
Refer to table 3-3 for listing of possible malfunctions.
Table 3-3. Troubleshooting.
Engine will not start
a. No fuel, or fuel shutoff valve
a. Open fuel shutoff valve, or fill tank.
b. Low temperature.
c. Loss of fuel, or air leak
c. Tighten loose fuel connections. Prime
d. Defective batteries
e. Improper valve clearance.
Engine hard to start
a. Air in fuel, or no fuel
a. Tighten loose connections, prime fuel
b. Low ambient temperature.
c. Clogged air cleaner
Engine starts but will not run,
a. Low on fuel
a. Service fuel tank.
or stalls frequently
b. Wrong type of fuel
b. Drain fuel tank and service with proper fuel.
c. Loss of fuel
c. Tighten loose fuel line connections then
d. Fuel filters clogged.
e. Air cleaner clogged or defective.
Engine starts but misfires, or
a. Wrong fuel in tank
a. Drain tank and service with proper
b. Fuel filters clogged.
c. Air cleaner clogged.
d. Fuel injector defective.
Engine lacks power
a. Air cleaner clogged or damaged.
b. Fuel filter, clogged or defective
c. Defective fuel lines
c. Tighten loose lines or fittings. Replace
a. Loose fan belt
b. Obstructions in fins of radiator
b. Clean fins.
c. Collapsed hose or loose connections
c. Check condition of coolant hose. Tighten
loose connections, or replace defective
hose (para 3-98).
d. Low on coolant
e. Check oil level. Add when necessary
f. Replace (para 3-98).
a. Air cleaner clogged.
b. Defective fuel injector
b. Replace (para 364).
Engine clutch slips
a. Clutch out of adjustment
b. Linkage out of adjustment
Engine clutch will not engage
a. Linkage out of adjustment
b. Clutch out of adjustment
c. Worn clutch
c. Report defect to general support maintenance.
Engine temperature fails to
Defective thermostat (stuck open)
Replace (para 3-98).
Water temperature indicator
a. Loose electrical connection
a. Tighten all connections. Make good
c. Indicator defective.