Maintenance
3A1185B
17
Sensor
1.
Remove the four screws, heatsink, and lower the
pressure control assembly.
2.
Disconnect swivel from sensor by holding sensor
with 7/8” wrench and loosening swivel with 11/16”
wrench.
3.
Disconnect sensor lead from the board. Carefully
pull sensor lead out of the terminal box and remove
sensor.
4.
Reassemble in reverse order.
Potentiometer
1.
Lower pressure control assembly as described
above.
2.
Disconnect potentiometer lead from pressure con-
trol assembly.
3.
Use a 1/16” allen wrench, loosen set screw in the
poteniometer knob and remove knob and spacer.
4.
Using a 1/2” wrench or deep socket, remove the nut
from the potentiometer shaft assembly.
5.
Pull entire potentiometer assembly out of the termi-
nal box.
6.
Replace in reverse order.
On-Off Toggle Switch
1.
Lower the pressure control assembly as described
above.
2.
Disconnect the two wires on the toggle switch.
3.
Use a 9/16” wrench to loosen the nut on the toggle
switch shaft.
4.
Reassemble in reverse order.
Fuse Holder
1.
Lower pressure control assembly as described
above.
2.
Disconnect the two wires on the toggle switch.
3.
Use a 9/16” wrench to loosen the nut on the toggle
switch shaft.
4.
Reassemble in reverse order.
Liquid Crystal Display (LCD)
1.
Lower pressure control assembly as described
above.
2.
Unscrew the four nuts (6/32”) and remove LCD Dis-
play assembly.
3.
If unable to loosen the four nuts, hold them and
unscrew the four screws. Then remove the LCD Dis-
play Assembly. If the display is removed in this man-
ner, the PET label must be replaced.
4.
Reassemble in reverse order, while making sure
that the four spacers and the four washers are in
place. Tighten the four nuts handtight and seal with
blue loctite.
Do not
overtighten the nuts as this will
damage the display.
