Groen CC20-E Operator's Manual page 286

Maintenance
Replacement Procedures
Fan and Motor
(continued)
Be sure oven is disconnected from branch
circuit power before performing any repair work.
Removal
1. Turn off oven power and disconnect oven from the branch circuit.
2. Remove right side cover.
3. Disconnect motor wires from motor harness.
4. Remove center and right side racks from inside of oven. Leave
boiler cover installed.
5. Remove capscrew (1), lockwashers (2), and washer (3).
Do not tap or hit the motor shaft as this could damage the
motor bearings and make it necessary to replace the motor.
6A. Fans With Knobs On The End of The Hub: New CC10-E and
CC20-E. CC10-G and CC20-G
Use a suitable wheel puller, a three jaw style puller with a 3/8"-16
screw. Remove the fan (4) and key (5). Care must be used not to
lose the key, when removing the fan.
6B. Fans Without A Knob On The End of The Hub (Smooth Hub):
CC10-E (Old style)
Install a 5/16 x 1" long setscrew into end of motor shaft. Leave
118" exposed beyond end of shaft.
Install a 7/16"-20 bolt, two inches long, and thread it into the hub.
Care must be used not to lose the key when removing the fan.
7. If the fan is frozen to the motor shaft, apply heat with a hand held
propane torch. Rotate the fan slowly to heat the hub evenly. Keep
the wheel puller (or 7/16"-20 Bolt) tight. Use penetrating oil if
necessary. Allow the penetrating oil to set for several minutes.
Apply more heat and penetrating oil, if needed.
8. Remove motor and slinger assembly (6).
9. Remove screws (7) and fiber washers (8) from inside the oven
chamber.
10. Remove retainer assembly (9), washer (10), packing (11), and
seal/housing (12).
11. Discard packing (11).
12. If motor is being replaced, remove motor from motor bracket.
Installation
1. Clean corrosion and other foreign matter from motor shaft.
2. Inspect motor shaft for deep scratches, burrs, or other damage. If
the motor shaft has deep scratches, burrs, or is in any other way
damaged, replace the motor.
3. If motor was removed from motor bracket, assemble motor to
Heating hub with torch bracket.
8-42
WARNING
CAUTION
(Revised 1/02)