Cessna 177 SERIES Service Manual

11-35. TROUBLE SHOOTING.
TROUBLE PROBABLE CAUSE REMEDY
NO OIL
PRESSURE. No oil in
sump. Check with
dipstick.
Fill sump with proper grade and
quantity
of oil.
Refer to Section
2.
Oil pressure
line broken,
Inspect
pressure
lines. Replace
disconnected or pinched,
or connect
lines as required.
Oil pump defective.
Remove and
inspect. Examine
engine. Metal particles from
damaged pump may have entered
engine oil passages.
Defective oil pressure gage.
Check with a known
good gage.
If second reading
is normal,
replace gage.
Oil congealed in gage line. Disconnect line at engine and gage/
transducer; flush with kerosene.
Pre-fill with kerosene and install.
Relief valve defective.
Remove
and check for
dirty or de-
fective parts. Clean and install;
replace valve if defective.
LOW OIL PRESSURE.
Low oil supply.
Check with dipstick. Fill sump
with proper
grade and
quantity
of oil. Refer to Section 2.
Low
viscosity oil.
Drain sump and refill with
proper
grade and quantity of oil.
Oil pressure relief
valve spring Remove
and inspect spring.
weak or broken.
Replace
weak or broken spring.
Defective oil pump. Check oil temperature and oil
level. If temperature is higher
than normal and oil level is
correct, internal failure is
evident. Remove and inspect.
Examine
engine.
Metal particles
from damaged pump may have
entered
oil passages.
Secondary
result of high oil Observe
oil temperature gage
for
temperature.
high indication. Determine
and
correct reason for high oil tem-
perature.
Leak
in pressure or suction
Inspect gasket between accessory
line.
housing and crankcase.
Repair
engine
as required.
Dirty oil screens. Remove and clean oil screens.
11-14 Change 5

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)