10. Service
PNEG-1717 CE Approved GSI/FFI Portable Dryer Manual 57
Removing the Fan Blade Assembly
1. Lock out and tagout the main power to make sure the dryer cannot be started during servicing.
2. Remove the grill guard.
3. If there is a safety washer present, remove the bolt, lock washer and safety washer.
4.Remove the bolts from the unthreaded holes of the bushing. Do not use these bolts for
bushing removal.
5.Using an allen wrench, undo the set screw (if present) and remove the key from the keyway.
6. Install grade 5 or stronger bolts into the threaded holes in the bushing and gradually apply torque to
each bolt to loosen the bushing.
7. Remove the bushing and fan blade assembly.
Installing the Fan Blade Assembly
1. Clean the motor shaft, key, bushing and the bore of the hub with a non-residual cleaner, such as
brake parts cleaner or electric parts cleaner. It is important that these mating surfaces be clean and
dry and no grease or oil is present. The parts must be assembled dry for maximum friction.
2. Insert bolts into bushing holes and ensure the shoulder portion of the bolt is NOT protruding
the hole.
3. Install the fan blade assembly onto the motor shaft.
4. Align the keyway in the bushing with the key and slide the bushing onto the motor shaft.
NOTE: Do not use excessive force to drive the bushing onto the shaft.
5. Align bushing and hub keyways with the key. Bushing should be flush with the end of the motor shaft.
6. Loosely install the bolts through the unthreaded holes in the bushing into the threaded holes of
the hub.
Although the taper-lock method of retaining the blade onto the motor shaft is very
simple and obvious, it is essential that the following points be read carefully and
fully understood, as improper installation can result in serious or fatal injury
caused by a loose, fast flying blade.
THREADED BUSHING HOLES:
The threaded holes within the bushing are provided
for disassembly purposes only. Do not attempt to use these holes for re-assembly,
as they will not allow the parts to become locked onto the shaft, thereby causing
an extremely hazardous operating condition.
CLEARANCE HOLES:
When re-assembling parts, the cap screws must be installed
through the UNTAPPED CLEARANCE HOLES to cause the blade to be pulled
forward onto the tapered bushing, thus locking the parts securely onto the motor
shaft. Refer to Page 59 (under installation section) for assembly details.
CAUTION
Do not use any lubricant or thread locking compound during installation. The use
of such products will cause improper bolt torque and will crack the fan hub.
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