Specifications

Troubleshooting
TX,100,DH2481 –19–02OCT92–3/12
Symptom Problem
Solution
544G, LL, TC, 624G—Injection Lightly tap injection pump housing. If
pump metering valve sticking. engine starts, see your authorized
dealer.
Fuel injection pump out of time. See your authorized dealer.
Engine overheating. See your authorized dealer.
644G—Incorrect slow idle, or Check and adjust slow idle. See
supplementary idling screw your authorized dealer.
adjustment.
Incorrect valve clearance. Check and adjust valve clearance.
(See Maintenance—Every 1000
Hours chapter.)
Valves sticking or burned. Remove fuel shut-off fuse. Crank
engine and listen for air leaking past
valves or an uneven starter speed.
See your authorized dealer.
Worn or broken compression rings Start engine and observe blow-by
or cylinder head gasket leaking. from vent tube. See your authorized
dealer.
Injection nozzle(s). See your authorized dealer.
Injection pump. See your authorized dealer.
Engine Misses Air in fuel. Disconnect return hose from leak-off
lines. Crank engine and check for
air in fuel at leak-off lines. Tighten
connections. Check fuel lines for
damage.
Incorrect grade of fuel. Drain fuel tank and add correct fuel.
Fuel injection pump out of time. See your authorized dealer.
Continued on next page
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