![background image](http://html1.mh-extra.com/html/jabiru/2200/2200_overhaul-manual_3122313071.webp)
Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
This document is controlled while it remains on the Jabiru server. Once this no longer applies the document becomes uncontrolled.
ISSUE
1
2
3
4
5
6 7
Dated : 28/10/2014
Issued By: AS
Page: 71 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
Relief poppets manufactured from brass must be replaced with steel items as they can wear at an
accelerated rate.
5.10.5.2 Cleaning
The oil pressure relief valve assembly is located underneath the oil filter / oil cooler adaptor on the side
of the crankcase as shown in Figure 81.
Wash the components of the valve thoroughly with kerosene and dry.
5.10.5.3 Inspection
Visually inspect the poppet for wear. If it has a significant worn ring where it has been sitting against
the washer then the marks must be polished out or the poppet replaced.
Take note of the number of washers fitted under the relief valve spring
– fitting more washers is a
method of adjusting the average oil pressure of the engine
– more washers = higher oil pressure. For a
solid lifter engine high oil pressure is not a problem (within the set limits) however a hydraulic lifter
engine needs mid-range oil pressure to operate properly. This will be adjusted during the engine test
run. AN4 type washers are used with 1 being fitted as standard during factory assembly. Up to 3 can
be used
– more than 3 will result in coil-binding of the spring and relief valve malfunctions. Valve
function can be checked by depressing the poppet and to ensure it can move off the seating washer.