Graco Therm-O-Flow Series Instructions-Parts List Manual page 17

Replace Heater Unit or Sensor
You can replace the automatic dispense valve heater
unit or sensor without removing the automatic dispense
valve from its mounting bracket. You only have to
disconnect the cable connector from the automatic
dispense valve.
This procedure requires:
• soldering iron
• solder
• shrink wrap
• wire cutters
• heat sink compound, Graco part number C07664 or
equivalent. Check with the material supplier for a
compatible compound.
1. Perform the procedures in Prepare to Service
Automatic Dispense Valve on page 12.
2. Remove the cable receptacle from the automatic
dispense valve.
a. Remove the two screws from the connector
cover [F . 9, Item (230)] and remove the recep-
IG
tacle cover.
b. Remove the two socket head screws [F
Item (200)], two washers (210). The heater car-
tridge (270) and sensor (320) will come out of
the dispense valve body.
F . 14
IG
310538N
Service
3. Remove old heater cartridge or sensor.
a. Locate the leads to the part you are replacing.
b. Remove the shrink wrap from the leads.
c. Unsolder the leads from the connector. Cut the
leads on 8 pin models, leaving enough to strip
and solder the leads.
4. Install new heater unit or sensor:
F . 15
IG
. 14,
IG
F . 16
IG
a. Install the shrink wrap over the leads.
Service
17