TM 5-3805-280-24-2
Fuel System Operation and Tests
DIAGNOSE ROTARY FUEL INJECTION PUMP MALFUNCTIONS
115
64
Symptom
Problem
Solution
Engine Starts Hard or Won't Start
Shut-off solenoid not functioning
Repair.
properly; or wiring lead loose or
broken.
Injection pump not correctly timed.
Check pump timing (refer to this
group).
Defective injection pump.
Remove pump from engine and
repair.
Automatic advance faulty or not
Adjust or repair.
operating.
Slow Idle Speed Irregular
Nozzle faulty or sticking.
Repair (See Group 35.)
Automatic advance faulty or not
Inspect and adjust or repair.
operating.
Injection pump not properly timed.
Check pump timing (refer to this
group).
Defective injection pump.
Remove pump and repair.
Engine Horsepower Low
Pump not properly timed.
Check timing (refer to this group).
Insufficient throttle arm travel.
Inspect and adjust.
Automatic advance faulty or not
Adjust or repair.
operating.
Nozzle faulty or sticking.
Repair. (See Group 35.)
Defective injection pump.
Remove pump and repair.
RG,115,JW7692
1924NOV971/1
13-591
