Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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6 7
Dated : 28/10/2014
Issued By: AS
Page: 100 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
7.1 Subassembly A
– Crankshaft, propeller flange and connecting rods
7.1.1 Crankshaft, propeller flange
Before beginning assembly ensure that the crank and propeller flange have been checked for run-out
(see Section 4.4.1).
Fit the 3 welch plugs to the crankshaft. All of the welch plugs should be expanded slightly before fitting.
The plugs and the areas in the crankshaft where they will be fitted must be cleaned with Loctite 7471
cure accelerator and then have a few drops of Loctite 620 Retainer applied around the inside of the
crankshaft and the outside of the plug before fitting.
Cleanliness is essential when using Loctite!
Figure 116
– Crankshaft Painting, Degree Wheel
Start with the front 7/8” plug, located at the back of the front double main bearing, driving the plug in
from the rear, then the rear 7/8” plug at the back of the crankshaft and finally the 28mm front plug
located at the very front of the crankshaft
– tap each plug squarely into place using a suitable sized drift
or punch: a very long 3/8” drive extension can be used for the front 7/8” plug. The front and rear welch
plugs should be tapped ¼” in from the face of the crankshaft, so that their outside lip sits about 1mm in
from the face of the crank.
Mask the oil seal bearing surface on the front of the crankshaft and paint the front end of the crankshaft
with a suitable paint (Figure 116 Left
– note masking tape visible on seal face). Paint the propeller
flange at the same time. When painting these parts always take care not to paint any mating faces or
faces where screw heads will bear.
Fit the propeller flange temporarily and mount the crankshaft vertically to the workbench/engine stand
on top of a degree wheel, with the #1 big end journal pointing at the 90 degree before top dead centre
(BTDC) mark on the degree wheel as shown at Figure 116, (right). i.e. set up so that TDC faces the
assembler’s chest and #1 big end points to the left.
Note that the propeller flange will be finally fitted after the front crankshaft seal housing has been fitted
when the engine is removed from the workbench/engine stand.
#1
