4
TM 5-2420-232-10
TROUBLESHOOTING PROCEDURES
-
ENGINE TROUBLESHOOTING
0010
Engine Fails to Crank When Start Switch Is Operated; Engine Cranks at Normal Speed but Will Not Start;
Engine Cranks Slowly and Will Not Start; Engine Smokes Excessively After Normal Warmup; Engine
Overheats During Normal Operation; Oil Temperature is Too High; Engine Runs Rough or Misfires and/
or Knocks, Engine Starts but Fails to Keep Running; Engine Uses Excessive Oil; Low (or High) Engine
Oil Pressure, Oil Temperature is Normal
INITIAL SETUP
References
References - Continued
0
0
0
0
0
0
0
ENGINE FAILS TO CRANK WHEN START SWITCH IS OPERATED
Step 1. Check battery disconnect switch is turned ON (WP 0004).
If OFF, turn the battery disconnect switch ON.
Step 2. Check if machine is in neutral.
If not, put in neutral.
Step 3. Check if the battery cables are loose, broken, or corroded.
If loose, broken, or corroded, notify Field Maintenance.
Step 4. If problem still exists, notify Field Maintenance.
ENGINE CRANKS AT NORMAL SPEED BUT WILL NOT START
WARNING
Do not smoke or permit any open flame in area of machine while you are servicing fuel system. Be
sure hose nozzle is grounded against filler tube during refueling to prevent static electricity. Failure
to follow this warning may result in injury or death to personnel or damage to equipment.
Operating personnel must wear fuel-resistant gloves when handling fuels. If exposed to fuel,
promptly wash exposed skin and change fuel-soaked clothing.
Always stop engine prior to refueling. If equipped with arctic cold weather starting aid system, turn
engine coolant heater off.
Do not perform fuel system checks, inspections, or maintenance while smoking or near fire, flames,
or sparks. Fuel may ignite, causing injury or death to personnel or damage to equipment.
Step 1. Check the fuel gauge to ensure enough fuel is present.
If empty, refuel the machine.
Step 2. Check for broken, leaking, or kinked fuel lines and hoses.
If any of these conditions are found, notify Field Maintenance.