TM 55-2540-241-23
Table 4-1. Troubleshooting (Continued)
Item
Trouble
Probable cause
Remedy
11 Idle speed too high.
a. Incorrect gas producer
lever setting.
b. Malfunctioning
tachometer.
c. Gas producer fuel
control idle adjustment
incorrectly set.
d. Contaminated fuel
control.
12 Oil pressure drops
a. Oil supply low.
off severely.
b. Oil pressure
transmitter hose
obstructed.
c. Regulator valve
sticking or broken
spring.
d. Defective oil pump.
e. Oil pressure
transmitter or indicator
giving false indication.
13 Excessive oil
a. Low oil supply.
pressure fluctuation,
b. Air in sensing line,
c. Faulty pressure
regulating valve.
d. Oil contamination
foaming and foreign
objects in tanks.
e. Internally kinked or
twisted engine oil inlet
line.
14 Low oil pressure.
a. Low oil supply.
b. Oil leaks,
c. Clogged oil filter.
d. Oil pressure hose
obstructed.
a. Check lever position and rigging.
b. Replace tachometer. (Refer to TM
55-1520-228-23.)
c. Correct the setting. (Refer to para
5-12.)
d. Replace control. (Refer to para
5-12.)
a. Check oil supply and refill as
necessary.
b. Clean or replace oil transmitter
hose (Refer to TM 55-1520 -228-23.)
c. Clean valve or replace spring.
(Refer to para 5-26.)
d. Replace engine. (Refer to TM
55-1520 -228-23.)
e. Check transmitter or indicator
and repair or replace if necessary.
(Refer to TM 55-1520-228-23.)
a. Check oil supply and refill as
necessary.
b. Bleed line.
c. Replace the valve. (Refer to para
5-26.)
d. Drain oil, inspect oil tank for
foreign objects and replace filter.
(Refer to para 5-25.) Inspect
magnetic chip detectors for metallic
particles. (Refer to para 5-24.)
Thoroughly flush with engine oil
while motoring engine. Drain and
refill with engine oil.
e. Replace oil line. (Refer to TM
55-1520-228-23.)
a. Check oil supply and refill as
necessary.
b. Check all piping and connections.
c. Clean or replace oil filter. (Refer
to para 5-25.)
d. Clean or replace transmitter hose
(Refer to TM 55-1520-228-23.)
4-6
Change 14
