Replacing The Oven Fan Motor - Agilent Technologies 6890 Series Service Manual

3. Use a hex wrench to remove the set screw securing the fan to the motor
shaft and carefully slide the fan off the shaft.
4. Reassembly is the reverse of removal.
When installing the fan, position it so it is flush with the end of the shaft
and the set screw seats on the flat part of the shaft. Check to make sure
that the fan does not touch anything when rotated. If it does, reposition
the fan on the shaft until the problem is corrected.

Replacing the oven fan motor

WARNING Before proceeding, turn off the oven and let it and any heated zones cool
down. Turn off the main power switch and unplug the power cord.
Caution Make sure you are properly grounded with an ESD strap before continuing.
1. Turn off the GC and unplug the power cable.
2. Remove the fan as described in the Replacing the oven fan procedure
earlier in this chapter.
3. Remove the rear covers from the instrument.
4. Unplug the fan motor wiring harness (P7) from the AC power board.
Squeeze the tabs on the sides of the connector and pull directly up.
5. Locate and detach the fan motor ground wire using a 7 mm nut driver.
It is secured to the chassis on the left side and below the fan motor as
you face the rear of the instrument.
6. Use a 7 mm nut driver to remove the three nuts (and six associated
washers) securing the motor to the oven.
Jun 2001
Mainframe
Agilent 6890 Gas Chromatograph Service Manual
Oven and Temperature Control
Replacing the oven fan motor
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