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F-12
TROUBLESHOOTING & REPAIR
FIGURE F.2
FIGURE F.3
FIGURE F.4
FAN BLADE AND MOTOR
REMOVAL
PROCEDURE DESCRIPTION
The following procedure will aid in the removal and
replacement of the fan blade and/or fan motor. It will
also provide reasonable access to the output diode
heat sinks.
TOOLS REQUIRED
● 5/16” nutdriver or socket wrench
● 7/16” nutdriver or socket wrench
● 7/16” open end wrench
● Phillips head screwdriver
● Needle nose pliers
PROCEDURE
1. Using the 5/16” nut driver, remove the three self-
tapping screws holding the fan bracket to the rear
panel.
Refer to Figure F-2.
2. Remove the two aluminum transformer secondary
leads from the diode heat sinks.
Note: When reassembling, use Dow 340 Heat
Sink Compound on connection surfaces.
3. Remove three large black leads and one small
blue lead from the large choke lead.
4. Remove leads #211 and #212 from the thermostat
located on the diode heat sink.
5. Remove the four leads from the fan motor noting
their positions. (TWO LEADS ON CODES
BELOW 9794.)
6. Remove the three wires connected to the input
receptacle. Note lead placement and connections.
(L1, L2, and green ground lead.)
7. Remove the four self tapping screws holding the
line cord and input receptacle to the back panel.
8. Remove input receptacle.
9. Remove the two Phillips head screws holding the
gas solenoid to the center baffle – See Figure F.3.
10. Remove the gas solenoid and set aside.
11. Lift up the rectifier fan motor bracket assembly
and support it near the top of the machine. This
should provide access to the fan blade and motor.
12. Slide the blade from the motor shaft,
taking note
of blade placement on motor shaft.
(Shaft
Indented approximately 0.10” from blade hub) -–
Figure F.4.
13. Remove the two Phillips head screws holding the
motor to the bracket. Remove the motor.
14. If the output diodes are to be removed, the leads
must be removed from the diodes and the heat
Gas Solenoid
Thermostat
Diodes