TM 5-3805-260-24
5.
NOT ENOUGH POWER (CONT.)
Cause
Correction
Wrong Valve Clearance
Make adjustment according to Testing and Adjusting.
Defect in Fuel Injection
Run engine at rpm that gives maximum misfiring or rough run-
Nozzle
ning. Then loosen a fuel line nut on the injection line for each cylinder, one at a
time. Tighten each fuel line nut before loosening the next one. Find the cylinder
where loosening the fuel line nut does not change the way the engine runs. Test
the fuel injection nozzle for that cylinder. Install new parts where needed.
Wrong Fuel Injection Timing
Make adjustment to timing.
Fuel Shut-off Solenoid or
Check for correct full power with solenoid removed. If the engine
Shut-off Linkage Causing a
has full power with the solenoid removed, the problem is in the
Restriction in the Travel of
solenoid or the shut-off linkage. Check for free travel of the
the Shaft for the Sleeves
linkage.
Constant Bleed Valve Stays
Replace constant bleed valve.
Closed
Exhaust System Has A
Check exhaust pipe and muffler for restrictions.
Restriction
6. TOO MUCH VIBRATION
Cause
Correction
Loose Bolt or Nut Holding
Tighten bolt or nut.
Pulley or Damper
Pulley or Damper Has A
Install a new pulley or damper.
Defect
Engine Supports Are Loose,
Tighten all mounting bolts. Install new components if necessary.
Worn, or Have a Defect
Misfiring or Running Rough
Make Reference to Item 2.
7.
LOUD COMBUSTION NOISE (SOUND)
Cause
Correction
Bad Quality Fuel
Remove the fuel from the fuel tank. Install a new fuel filter element. Put a good
grade of clean fuel in the fuel tank.
Defect in Fuel Injection
Install a new fuel injection nozzle.
Nozzle
Wrong Fuel Injection Timing
Make adjustment to timing.
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