Technical data

13773-001
79-00
Page 2 30 Nov 2000
2. TROUBLESHOOTING
Trouble Probable Cause Remedy
High Oil Temperature Indication Thermostat damaged or held open
by solid matter.
Remove, clean valve and seat. If
still inoperative, replace.
Oil viscosity too high. Drain and refill with correct sea-
sonal oil grade. (Refer to 12-20)
Prolonged ground operation. Limit ground operation to a mini-
mum.
Malfunctioning gage or bulb unit. Check wiring. Check bulb unit.
Check gage. Replace malfunction-
ing parts.
High power, low airspeed. Adjust power - flight altitude.
Low oil supply. Replenish oil supply.
Cooler air passages clogged. Clean cooler thoroughly.
Cooler core plugged. Remove cooler and flush thor-
oughly.
Baffle damaged. Inspect baffling for damage or
worn seals. Replace as required.
Fuel system set too lean. Adjust mixture setting in accor-
dance with TCM SID 97-3.
Low Oil Pressure Indication Low oil supply. Replenish oil supply. (Refer to 12-
10)
Oil viscosity too low Drain and refill with correct sea-
sonal oil grade. (Refer to 12-20)
Foam in oil due to presence of
alkaline solids in system.
Drain and refill with fresh oil. (It
may be necessary to flush cooler
core if presence of alkaline solids
is due to previous cleaning with
alkaline materials.) (Refer to 12-
20)
Pump producing low pressure. Replace pump.
Malfunctioning pressure gage. Check gage. Replace if required.
Weak or broken oil pressure relief
valve spring.
Replace spring. Adjust pressure to
30-60 p.s.i. with oil at normal oper-
ating temperature.