TM 5-3805-280-24-2
Fuel System Operation and Tests
DIAGNOSE IN-LINE FUEL INJECTION PUMP MALFUNCTIONS
115
70
Symptom
Problem
Solution
Engine Starts Hard or Won't Start
Incorrect fuel shut-off lever position
Adjust shut-off cable as required.
(pump control rack not moving all
the way forward).
Defective injection pump.
Remove pump from engine and
repair. (See Group 35.)
Injection pump not correctly timed.
Check pump timing.
Slow Idle Speed Irregular
Slow idle stop screw improperly
Recheck stop screw adjustment.
adjusted.
Supplementary idling spring
Recheck adjustment.
improperly adjusted.
Defective injection pump.
Remove pump from engine and
repair. (See Group 35.)
Engine Horsepower Low
Pump not properly timed.
Check timing.
Defective injection pump.
Remove pump from engine and
repair. (See Group 35.)
RG,115,JW7687
1924NOV971/1
13-597
