Engine Maintenance Manual
Jabiru Aircraft
Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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Dated : 2nd June 2015
Issued By: AS
Page: 71 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
9.20
Hydraulic Valve Lifter Maintenance
Required Tools:
Allen Keys
Parts and Material:
Engine Oil
Type of Maintenance:
Heavy Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
The Hydraulic Valve Lifters used in the engine automatically adjust for any valve movement, so
periodic adjustment of the valve clearances is not required, however the valve lifters are a
serviceable item and some monitoring is required to ensure they are working properly.
EITHER
– Remove each rocker cover and check that each lifter has not collapsed. This is
done by turning the crankshaft so that the valve is fully in the closed position, then feeling the
rocker by hand. There should be no free rotation of the rocker. Press down on the pushrod
end of the rocker
– the lifter should feel hard, with minimal movement possible under thumb
pressure. Note that the correct method for finding this point is to turn the crank until the valve
is fully open, then turning the crankshaft through one complete revolution to rotate the cam
lobe away from the lifter.
OR
– after the service, idle the engine, listen for loud tapping noises and feel for rough running.
This must be carried out with the cowls removed. Note that due to the need to have a person
at the controls of the aircraft, this is a two-person job.
CAUTION:
Whenever the engine is running there must be a qualified person inside the aircraft, at the
controls. Under NO circumstances run the engine without a qualified person at the controls
Troubleshooting information is given in Section 10.16
Air can be caught inside the lifters after maintenance. Running the engine at a high idle -
approx 1500 RPM
– will expel the air but may take up to 15 minutes. When fitting lifters after
inspection or maintenance they should be filled by injecting oil into the hole in the side of the
lifter. Care must be taken to ensure all air is removed.
Several different hydraulic lifters have been used in Jabiru 2200 engines. The cam P/No. fitted
to the engine must be known when ordering replacement lifters. This information can be found
from the engine’s S/No. or from its overhaul records. The type of lifter must be matched
correctly to the cam design. Use of mismatched parts will cause reduced engine power and
possible engine damage.
Figure 42 shows identification markings on a cam
– it has two “rings” machined at the oil pump
end and two small “spots” machined at the drive gear end. Similarly, other cams are marked
with one “ring”, and one “spot”. Engines assembled with these cam types must use a Jabiru
P/No. PE4A001 Hydraulic Lifter.
Cams manufactured
without
any identification “rings” or “spots” must use a Jabiru P/No.
4A294C0D Hydraulic Lifter.
The different types of Hydraulic Lifter are not marked and the difference requires disassembly
and careful measuring using a micrometer to detect. Accordingly, care must be taken to
ensure different types of lifter are not confused during maintenance.