Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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Dated : 28/10/2014
Issued By: AS
Page: 196 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
Figure 210
– Drilling & Reaming Crankshaft – ILLUSTRATION ONLY.
Use of a suitable lubricant when drilling the crankshaft is recommended as it is a high grade steel. It
will also prolong the life of the drilling jig. Drill the crankshaft dowel holes 10 deep (i.e. 10mm of full-
diameter hole
– the tip length of the drill is not counted in this length). When reaming, the guide is used
to ensure a straight entry for the ream. The first time the jig is used the ream will be quite tight in the
holes. Minimum ream depth into the crankshaft is 6.5mm
– but due to the use of hand tools reaming to
7-8mm depth is recommended.
12.4.2.5.1 Flywheel.
Like the crankshaft, the flywheel needs matching dowel holes. When fitting the drilling guide to the
flywheel use the positioning hole to align it correctly. Use the 4 x 5/16” UNF screws used in the
crankshaft section above to hold the fixture to the flywheel
– use nuts and washers on the rear side
(alternator side) of the flywheel. Move the bolts around so that there is a clear space around the hole
being drilled. Make sure two bolts always stay tight so that the guide can’t move.
Once the guide is in place, drill all the way through the flywheel for each of the dowel holes. Then ream
the holes using the guide to align the ream. Being aluminium it is very easy to ruin the fit of the hole if
the guide is not used.
Figure 211
– Aligning Guide & Fitting To Flywheel.