Aerovent IM-111 - Manual (Page 2)

Put the bushing loosely into the bore of the hub. Do
not press or drive. Start the cap screws by hand,
turning them just enough to engage the threads in
the nut, which are recessed into the hub on the
propeller. Do not use a wrench at this time. The
bushing should be loose enough in the propeller to
move slightly.
Be sure the shaft and keyway are clean and
smooth. Check the key size with both the shaft and
bushing keyways. Slide the propeller and bushing
assembly onto the shaft, making allowance for end
play in the shaft to prevent rubbing. Do not force
the propeller and bushing onto the shaft. If it does
not go on easily, check the shaft, bushing, and key
sizes.
Tighten the cap screws progressively with a
wrench. Do this evenly as in mounting an automobile
wheel. Take a part turn on each cap screw succes-
sively until all are tightened to the torque shown in
Table 1.
These cap screws force the tapered bushing into
the hub, which in turn compresses the bushing on
to the shaft.
WARNING: Do not attempt to pull the bushing flange
flush with the hub end. There should be 1/8" to 1/4"
clearance when tightened.
Removing the Propeller Assembly from
the Shaft
The propeller is easily removed from the shaft by
inserting and tightening two of the cap screws into
the tapped holes in the bushing flange. This forces
the bushing loose from the propeller and releases the
compression so that the entire assembly will slide off
the shaft.
1. Remove all the cap screws from the propeller and
hub assembly.
2. Start the cap screws into the threaded holes in
the bushing flange.
3. Tighten each bolt part of a turn successively to
force the propeller off the bushing.
4. Pull the bushing off the shaft. If the assembly has
been in place for some time, it may be neces-
sary to use a wheel puller to remove the bushing.
Never use a wheel puller on the propeller.
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WARNING
Do not lubricate the cap screws, bolt, shaft
or bushing barrel.