Jabiru 3300 - LOW OIL PRESSURE

Engine Maintenance Manual
Jabiru Aircraft Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
1
2
3
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5
Dated : 2nd June 2015
Issued By: AS
Page: 84 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
10.8 Low Oil Pressure
Possible Cause
Remedy
1)
Insufficient oil in sump
Check oil level & replenish as necessary
2)
High oil temperature
Check engine is not over-full with oil
Check installation: improper gaps or insufficient pressure
head produce low airflow which can lead to elevated
temperatures.
3)
Faulty pressure gauge, sender or wiring
Check gauge, sender & wiring. Renew as necessary.
4)
Faulty crankshaft bearings
Engine overhaul
5)
Relief valve not sealing
Inspect, replace back after cleaning. Foreign matter
stuck in the valve will produce low pressure.
10.9 Oil Pressure Varying
Possible Cause
Remedy
1)
Low oil level
Check oil level & replenish as necessary
2)
Sender, gauge or connection fault
Check continuity of sender wire.
Check sender body is earthed to engine
Check gauge – replace with known good gauge if
possible.
Adjust oil pressure relief valve
10.10 Engine Keeps Running with Ignition Off
Possible Cause
Remedy
1)
Idle speed too high
Adjust to proper idle speed (900 RPM)
2)
Faulty ignition switch
Check switch & cables. Repair/replace as necessary
3)
Overheated engine
Conduct cooling run at 900 RPM
10.11 Excessive Oil Consumption
Possible Cause
Remedy
1)
Worn, broken or wrongly fitted piston rings
Repair/engine overhaul necessary
2)
Poor oil quality
Oil change, use specified oil
3)
Worn valve guides
Repair of cylinder head necessary
4)
Oil leaks
Seal leaks
10.12 Oil Collector Bottle on Firewall Fills Quickly
Possible Cause
Remedy
4)
Worn, broken or wrongly fitted piston rings
Repair/engine overhaul necessary
5)
Incorrect oil grade
Oil change, use specified oil
6)
Worn or distorted cylinders
Repair/engine overhaul necessary
7)
Over-filling sump
Reduce oil level in sump
8)
Negative-g
The Jabiru Engine is not approved for deliberate
negative G operations. Strong turbulence in flight can
have a similar effect: reduced RPM /speed is
recommended when operating in strong turbulence.