Graco Therm-O-Flow 20 Instructions - Parts Manual page 42

Service
Replacing Wiper
1. Follow Pressure Relief Procedure, page 30.
2. Separate the wiper joint, and bend back the strap-
ping that covers the clamp (207). F
3. Unscrew the worm gear and remove the wiper
(202).
4. Thread the strapping through the new wiper (202).
5. Insert the strap end through the clamp (207) and
tighten.
6. Use a rubber mallet to pound the wiper around the
platen (201) until the wiper ends are butted tightly
together.
7. Apply a lubricant to the wiper (202). Use a lubricant
that is compatible with the material to be pumped.
Check with the material supplier.
Replacing Platen Heat Sensor
For more information about the platen, refer to
page 41.
1. Follow Pressure Relief Procedure, page 30.
2. Make sure the ram control lever is set to OFF.
3. Turn OFF the main electrical disconnect (K).
4. Disconnect quick connect terminal (233).
5. Loosen the conduit locknut on sensor (219). F
Unscrew the sensor from the platen.
6. Coat the new sensor with non-silicone heat-sink
compound.
7. Slide the sensor (219) into the opening in the platen
(201). Be sure it is seated to the bottom of the
platen.
8. Tighten the conduit locknut on the sensor.
9. Reconnect the quick connect terminal (233).
42
218
. 22.
IG
206
205
228
229
231
224
223
232
225
. 22.
IG
F
IG
217
215
233
. 22: Platen
216
214
213
203
212
204
219
201
202
207
TI10085A
311976K