Maintenance Manual
AEROPRO CZ
10-13
Maintenance Manual
March 21, 2020
10.21 Shock-mount pads
The rubber shock-mounts are designed to reduce transmission of the engine vibrations to the
airframe. The rubber parts should be wiped with a clean dry cloth. Inspect rubber parts for swelling,
cracking, or pronounced set of the part. Replace all parts that show evidence of wear or damage.
10.22 Engine oil system
The Rotax 912 series engine is provided with a dry sump forced lubrication system with a main oil
pump, a integrated pressure regulator and oil pressure sensor. The oil pump is driven by the camshaft.
The oil pump sucks the motor oil from the oil tank via the oil cooler and forces it through the oil filter to the
points of lubrication in the engine. The surplus oil emerging from the points of lubrication accumulates on
the bottom of the crankcase and is forced back to the oil tank by the blow-by gases. A vent line on the oil
tank provides venting for the circuit. An oil temperature sensor is used for reading of the oil inlet
temperature and is located on the oil pump housing. Refer also to the Engine Operators Manual for
detailed information.
10.23 Trouble shooting
The following listing should be understood as quick reference guide to locate particular trouble
which may occur to the engine oil system. For detailed information refer to the engine manufacturers
Maintenance manual.
Trouble
Probable Cause
Remedy
No oil pressure.
No oil in system.
Fill system with proper grade
and quantity of oil. Refer to
Section 1.
Oil pressure line broken,
disconnected or pinched.
Replace or connect.
Oil pressure line broken,
disconnected or pinched.
Replace or connect.
Defective oil pressure sensor.
Replace oil pressure sensor.
Wiring of oil pressure sensor
broken or disconnected.
Connect or repair wiring.
Oil pump defective.
Remove and inspect in
accordance with the Rotax
Maintenance Manual.
Low oil pressure.
Defective oil pressure sensor.
Replace oil pressure sensor.
Defective oil pressure gauge.
Replace or repair EIS system
Low viscosity oil.
Drain oil and refill with proper
grade and quantity of oil.
Oil pump defective.
Remove and inspect in
accordance with the Rotax
Maintenance Manual.
Oil pump suction tube screen
plugged or internal oil leak.
Engine overhaul required.
Secondary result of high oil
temperature.
Observe oil temperature gauge
for high indication. Determine
and correct reason for high oil
temperature.
Summary of Contents for CZ A220
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