TROUBLESHOOTING
TESTING AND ADJUSTING
TM 5-3805-263-14&P-2
1. ENGINE CRANKSHAFT WILL NOT TURN WHEN START SWITCH IS ON
Cause
Battery Has Low Output
Wiring or Switches Have Defect
Starter Motor Solenoid Has
A Defect
Correction
Make Reference to Item 26.
Make Reference to Item 26.
Make Reference to Item 25.
Starter Motor Has A Defect
Inside Problem Prevents Engine
Crankshaft From Turning
Make Reference to Item 25.
If the crankshaft can not be turned after disconnecting the driven
equipment, remove the fuel nozzles and check for fluid in the cy-
linders while turning the crankshaft. If fluid in the cylinders is not the
problem, the engine must be disassembled to check for other inside
problems. Some of these inside problems are bearing seizure, piston
seizure, or wrong pistons installed in the engine.
2. ENGINE WILL NOT START
Cause
Slow Cranking Speed
No Fuel In The Housing For The
Fuel Injection Pumps
Dirty Fuel Filter
Dirty or Broken Fuel Lines
No Fuel To Cylinders
Bad Quality Fuel
Correction
Make Reference to Item 26.
Fill the housing for the fuel injection pumps with fuel with the
priming pump. Remove the air with the bleed valve.
Install new fuel filter.
Clean or install new fuel lines as necessary.
Put fuel in fuel tank. “Prime” (remove the air and/or low quality fuel
from the fuel system).
Remove the fuel from the fuel tank. Install a new fuel filter element.
Put a good grade of clean fuel in the fuel tank.
Fuel Has “Cloud Point” Higher
Drain the fuel tank lines, and fuel injection pump housing. Change
Than Atmospheric Temperature
the fuel filter. Fill the tank with fuel which has the correct “cloud
(“Cloud Point” = Temperature
point” and remove the air from the system with the priming pump
Which Makes Wax Form In Fuel.)
and bleed valve.
Wrong Fuel Injection Timing
Make adjustment to timing.
Over Fueling Spring Not Installed
Install over fueling spring.
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