5
GC Main Frame Advanced Maintenance
Replacing the Oven Motor
Thermo Scientific
TRACE 1300 and TRACE 1310 Hardware Manual
223
a.
Loosen the Allen screw. Carefully remove the oven fan from the blower motor shaft.
9. Remove the blower motor.
a.
The blower motor plugs into the connector marked
J7
(Motor fan) on the Backplane
board. Unplug the blower motor electrical plug by pushing down on the plug tab and
pulling out.
b. The ground strap from the motor is secured to chassis ground on a terminal just
below the starting capacitor. Locate this terminal.
c.
Remove the terminal nut using a 4-mm nut driver; or, unplug the connector. Remove
the ground wire.
d. The blower motor is secured to the back of the oven wall with three #4 self-locking
nuts. Remove these nuts using the same 4-mm nut driver. See
Figure 212.
Removal the Oven Blower Motor
e.
Locate and note the orientation of the six shoulder washers on each side of the three
grommets, before removing the blower motor.
f.
Locate the three flat washers between the locking nut and the shoulder washers.
Remove and retain these washers for reassembly.
g. Remove the blower motor from the oven by pulling outward.
10. Assemble the oven motor
The replacement blower motor contains the mounting brackets with the three grommets
in place. The existing blower motor will have a total of six shoulder washers.
Three shoulder washers are installed on each side of the grommets.
a.
Remove the all of the shoulder washers from the old blower motor.
b. Place three of the shoulder washers over the mounting studs located on the back oven
wall.
Self Locking Nuts