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TM 5-4210-220-12
Table 4-2 UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13b ENGINE CRANKS BUT WILL NOT START - Continued
Step 5. Check fuel priming pump operates.
Repair fuel priming pump, (see para. 4-23).
13c ENGINE HAS DIFFICULTY IN STARTING
Step 1. Check battery and starting motor connections.
Tighten and remove corrosion products.
Step 2. Check lubricating oil.
Fill engine with correct lubricating oil, (see LO 5-4210-220-12).
Step 3. Check starter motor current draw.
Repair motor as required, (see para. 4-24).
13d ENGINE STARTS BUT STOPS OR RUNS ERRATICALLY
Step 1. Check for fuel leaks.
a. Tighten/remake connections, (see para. 4-23).
b. Replace fuel lines, (see para. 4-23).
Step 2. Check for crimped or blocked fuel lines.
Replace fuel lines, (see para. 4-23).
Step 3. Check for dirty fuel filters.
Replace both fuel filters, (see para. 4-23).
Step 4. Air in system due to foaming in fuel tank.
Replace fuel tank, (see para. 4-23).
Step 5. Remove fuel tank fill cap. If engine runs smoothly, vent in tank is blocked.
Clean/replace vent.
Step 6. Check coolant temperature.
a. Replace thermostats if engine will not heat up, (see para. 4-28).
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