GSi COMPETITOR 2000 Series, Operation And Service Manual

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29
SERVICE
FAN PROPELLOR REMOVAL AND INSTALLATION
The fan propellor is secured to the
motor shaft by the use of a taper-
lock bushing, motor shaft key and
three cap screws.
CAUTION: Although the taper-lock
method of retaining the propellor
onto the motor shaft is simple, it is
essential that the following points be
read carefully and fully understood.
Improper installation can cause a
loose flying propellor, and result in
serious injury or death.
THREADED BUSHING
HOLES
The threaded holes within the bush-
ing are provided for disassembly
purposes only. Do not attempt to use
these holes for reassembly. They
will not allow the parts to lock onto
the shaft thereby causing a hazard-
ous operating condition.
CLEARANCE HOLES
Fan Hub
Key
Capscrews installed
through threaded
holes of bushing
2. Remove the three cap screws
from the clearance holes in the
taper-lock bushing.
3. Install two grade 5 cap screws
into the threaded holes in bush-
ing, and turn them by hand until
they bottom against the front
surface of the propellor.
4. Block propellor to prevent it from
turning, and gradually turn the
cap screws (up to 1/4 turn at a time)
until the propellor breaks loose
from the bushing and motor shaft.
Carefully remove bushing and
propellor. With the propellor free
from the bushing, a wheel can be
used to pull the bushing off of the
motor shaft. Reattach bushing onto
propellor to prevent the loss of parts.
Note: During manufacture the
propellor and bushing on the 26" and
28" solid aluminum blades are bal-
anced together, and are marked with
two small dots to identify their origi-
nal alignment position. Check the
bushing and propellor to make sure
they have alignment marks. Mark
the alignment of the propellor and
bushing, if necessary.
On Crowley blades (a compos-
ite plastic), the propellor and bush-
ing have a keyway that prevents any
misalignment of the two pieces.
There are alignment marks on the
back of the fan hub assembly. If the
user were to replace one of the blade
fins, alignment would be necessary.
However, this is not recommended.
In most cases, the complete
propellor should be changed.
Split Taper Bushing
Fan Hub
Fan blade
removal
Split Taper Bushing
Capscrews installed
through threaded
holes of bushing
When reassembling parts, the cap
screws must be installed through the
untapped clearance holes as shown.
This will cause the propellor to be
pulled forward onto the tapered
bushing, thus locking the parts se-
curely onto the motor shaft.
When fan servicing requires re-
moval and installation of the
propellor, make sure the propellor
is removed and reinstalled properly.
1. Lock out the fan power supply,
remove the fan guard and the
venturi, as required on some
models.
Fan blade
installation