Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Firewall forward>Fit propeller flange extension
Tuesday, April 6, 2010
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Clean and prepare the screws and hub
Clean the cap screw threads with a wire brush – make sure that there is no residual Loctite in
the threads. Clean all threads with cleaning solvent (Loctite 7471 cleaner or Acetone) and dry.
Run a 3/8” UNF flat bottomed tap all the way into each bolt hole in the hub, apply a cleaning
solvent (Loctite cleaner or Acetone) into each hole and then blow dry with compressed air.
Check that each thread is absolutely clean and dry before proceeding
.
Fit the propeller flange extension
Set your torque wrench to 30 ft/lbs or 40 Nm and place it on top of the engine.
Apply a few drops of Loctite 620 to each screw
hole, place the propeller flange extension on the
hub and fit the 6 cap screws and washers.
Have your helper lock the engine from turning and
tighten all the cap screws firmly then torque each
cap screw to 30 ft/lbs or 40 Nm, working in a criss-
cross pattern as shown at right. Re-check each cap
screw, applying steady pressure on the torque
wrench until the torque value is reached.
Re-check the torque values again and then lockwire
each pair of cap screws together. Lockwiring cap
screws in extended propeller flanges is very
difficult. Jabiru only lockwire cap screws in
standard propeller flanges.
This completes the
Pre-Paint>Fuselage >Firewall forward>Fit propeller flange
extension
task.
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