45
7) Remove the 1/4" x 1/4" x 1-3/4" key on the fan (impellor) shaft.
(a) Slide the squirrel cage fan (impellor) off of the shaft.
NOTE: Install this 1/4" x 1/4" x 1-3/4" key on to the fan shaft before installing the new squirrelcage fan.8) To install new squirrel cage fan (impellor) , reverse above procedure (steps #6 through #1).
d) V-Belt Replacement
1) Discontinue electric service to the dryer.
2) Loosen the bolts securing the blower (fan and impellor) motor.
(a) Ease off on the tension bolt.
3) Slide the blower (fan and impellor) motor forward.
4) Remove and replace V-belts.
5) Tighten the tension bolt.
IMPORTANT: DO NOT OVERTIGHTEN V-BELTS.6) Using a straight edge, make certain that the motor pulley and V-belts are aligned straight.
7) Tighten bolts from motor to motor base.
8) Reestablish electric service to the dryer.
e) Fan (impellor) Shaft Replacement
The procedure to replace the Fan Shaft is the same procedure used to replace the Shrouded Pillow Block
Bearing (refer to pages 43 and 44).
3.Blower (impellor and fan) Electrical Components
a) Blower (impellor/fan) Controls and Overloads
1) Thermal Magnetic Starter (TMS)
The thermal magnetic starter is used as a safety device to protect the motor from starting in a locked
rotor condition. The overload has a dial setting on the face of the device. To set the overload, refer
to your specific electrical diagrams. The overload is specifically designed for motor applications.
It has a current curve built into it so the initial high current draw by the motor will not trip the
overload. On the face of the overload, there are two (2) push buttons - "START" (Black or Tan - 1)
and "STOP" (Red - 0) - the overload has to be in the "START" mode for the motor to run.