Replacing Over Temperature Switch Assembly - Graco THERM-O-FLOW T7 Series Instructions Manual

Replacing over temperature
switch assembly
For replacement parts, see Parts, page 40.
1.
Turn on/off switch to OFF. Unplug tank unit.
2.
Remove tank cover, see Removing tank cover,
page 25.
3.
See F . 10. Using an ohmmeter, test over temper-
IG
ature switch wires (AA, BB) at the wire terminal.
Ohmmeter should show open if switch is good. If
switch is bad, continue to step 4.
AA
BB
FF
F . 10: Power supply
IG
4.
See F . 10. On the back of the tank, remove two
IG
8-32 x 1/2 in. screws (FF) on the power supply.
34
5.
From top of power supply, disconnect motor wire
harness. Pull power supply away from the tank.
6.
Cut tape around insulation and remove.
7.
Remove screws (48) and pull switch assembly (47)
from tank. Disconnect switch assembly wires from
powers supply board. Check switch assembly with
ohmmeter. Switch should be open or infinite value
shown. If not, replace with new assembly.
8.
Reassemble new switch assembly in reverse order.
Repair
TANK BACK
47
48
309832D