A quarterly interval is equal to 3 calendar months or 250
indicate the sequence of minimum requirements. Refer
hours of operation, whichever occurs first.
to figure 6 for the quarterly preventive maintenance
services.
b. The item numbers are listed consecutively and
Section IV. TROUBLESHOOTING
23. Engine Misses or Runs Erratically
20. General
Probable cause
Possible remedy
This section provides information useful in
Rocker arm clearance................ Adjust rocker arms (para. 97).
diagnosing and correcting unsatisfactory operation or
incorrect.
failure of the roll crusher and its components. Each
Fuel injectors defective............... Replace fuel injectors
trouble symptom stated is followed by a list of probable
causes of the trouble.
The possible remedy
recommended is described opposite the probable cause.
Fuel pump defective................... Report this condition to field
Any trouble beyond the scope of organizational
maintenance, 3d echelon.
maintenance must La reported to field maintenance, 3d
24. Engine Stops Suddenly
echelon.
Probable cause
Possible remedy
Fuel injection pump.................... Replace fuel injection pump.
21. Starter Fails To Crank Engine
defective.
Report this condition to
Probable cause
Possible remedy
field maintenance, 3d
Poor electrical ............................. Clean and tighten battery
echelon.
connections................................. cables and other electrical
Engine temperature too.............. Remove and test thermostat
connections.
high (engine safety
(para. 103). Replace defec-
Starter switch defective.............. Replace starter switch
switch operates).
tive thermostat (para. 103).
Oil pressure low (engine............. Inspect for and repair leaks
Batteries discharged................... Charge batteries or replace
safety switch operates).
in oil lines (para. 71).
defective batteries. Inspect
Engine safety switch................... Replace engine safety switch
generator output and re-
defective.
place brushes or generator
Over-speed governor................. Replace overspeed governor
as necessary (para. 80).
defective.
Starter brushes worn................... Replace starter brushes (para.
25. Engine Overheats
Probable cause
Possible remedy
Starter solenoid defective........... Replace defective starter
Thermostat defective ................. Replace thermostat (par.
solenoid (para. 81).
103).
22. Engine Hard To Start or Fails To Start
Fan belts worn and..................... Replace fan belts (para. 100).
Probable cause
Possible remedy
slipping on pulley.
Battery charge low ..................... Charge or replace batteries.
Fuel injection pimp...................... Time injection pump. Report
Inspect generator output
timing incorrect.
this condition to field main-
and replace brushes or
tenance, 3d echelon.
generator as necessary
Defective water pump................ Replace water pump (para.
Fuel lines clogged....................... Clean fuel lines (pal. 65).
Back pressure, in........................ Inspect or restriction in
Fuel injector pump
Replace fuel pump. Report
exhaust system.
defective.
this condition to field main-
system and clean
tenance, 3d echelon.
Fuel injectors dirty....................... Replace fuel injectors (para.
26. Engine Lacks Power or Will Not Idle
Smoothly
Rocker arm clearance................ adjust rocker arms (para. 97).
Probable cause
Possible remedy
incorrect.
Rocker arm clearance................ Adjust locker aims (para.9i).
Fuel injection pump.................... Time injection pump. Report
incorrect.
timing incorrect.
this condition to field main-
Engine operating......................... Replace defective thermostat
tenance, 3d echelon.
temperature low.
(pair. 103).
Starter defective.......................... Replace starter (par-. 82).
Fuel injectors defective............... Replace defective fuel injec-
Defective air cleaner................... Replace the air cleaner (para.
tors (para. 61).
59).
Fuel pump defective................... Report this condition to field
Fuel tank valve closed................ Open fuel tank valve.
maintenance, 3d echelon.
Restricted fuel supply................. Remove fuel lines and clean
or air in system.
(par, 65) Bleed fuel system
(TM 5-3820-205-10/1).
AGO 8157A
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