TM 55-2840-241-23
Table 4-1. Troubleshooting (Continued)
Item
Trouble
Probable Cause
Remedy
18 OIL TEMPERATURE
EXCEEDS 248°F 120°C)
momentarily or 225°F
(107°C) for a period ex-
ceeding 10 minutes.
Contaminated oil or
oil cooler malfunction.
a. Test the engine oil temperature
indicating system, m accordance with
TM 55-l520-228-23.
NOTE
Check the engine oil cooler.
b. Remove the engine oil temperature
indicating system, in accordance with
TM 55-1520-228-23.
c. Tag the engine indicating that
maximum allowable operating oil
temperatures were exceeded. Give
maximum temperate and elapsed
time.
19 No response to oil
sure adjustment.
pres-
20 Oil consumption exceeds
0.05 gallon (0.19 litre or
6.5 oz) per hour, or 1 quart
(0.9 litre) per five hours.
b. Replace engine. (Refer to TM
and power turbine
governor) or from
drain on fuel pump.
20.1
21
21.1
22
Oil Consumption exceeds
one quart (0.9 litre) per
hour.
a. Replace engine. (Refer to TM
55-1520-228-23.)
Oil spewing from diffuser
vent orifice.
Oils wing at compressor
bleed control valve.
Low power with high
TOT.
Defective pressure
regulating valve.
a. External oil leaks.
b. Oil leakage from
power turbine oil bel-
lows seal.
c. Leaking accessory
oil seals as evidenced
by oil draining from
wee hole (on gas
producer fuel control
a. Coking or carbon
buildup in power
turbine support.
b. Improper fit be-
tween power turbine
inner and outer shafts.
Orifice improperly
sized.
No. 1 bearing seal
failure.
a. Compressor foreign
object damage. or
excessive erosion.
b. Dirty Compressor.
Replace oil filter housing assembly.
(Refer to paragraph 5-2.)
a. Check all fittings and connections.
55-1520-228-23.)
c. Replace defective seals. (Refer to
paragraph 7-27.)
b. Replace engine. (Refer to TM
55-1520-228-23.)
Replace orifice with next smaller size.
(Refer to paragraph 10-9.)
Replace en inc. (Refer to TM
55-1520-228-23.)
a. Replace engine if damage exceeds
limits. (Refer to paragraphs 7-9 or
7-l0.)
b. Clean compressor. (Refer to
paragraph 7-3.
4-8
Change 16
