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Service
22
309858K
Follower Service
Replacing Wipers
1.
Follow Before Servicing procedure, page 21.
2.
Separate the wiper joint, and bend back the strap-
ping that covers the clamp (107). F
3.
Unscrew the worm gear, then remove the wiper
(102).
4.
Thread the strapping through the new wiper (102).
5.
Insert the strap end through the clamp (107) and
tighten.
6.
Use a rubber mallet to pound the wiper around the
follower plate (101) until the wiper ends are butted
tightly together.
7.
Apply a lubricant to the wipers (102). Use a lubricant
that is compatible with the material to be pumped.
Check with the material supplier.
Replacing Heat Sensors
1.
Follow Before Servicing procedure, page 21.
2.
Make sure the ram control lever is set to OFF.
3.
Turn the CONTROL switch (65) to OFF. F
. 5, page
4.
Turn OFF the main electrical disconnect.
5.
Loosen the nut on sensor (119). F
6.
Remove the sensor (119).
7.
Loosen the cord grip (items 16, 17, 18 on page 30
or 23, 24, 25 on pages 32 and 34).
8.
Open the electrical control box (13, on page 30).
9.
Disconnect the 2 sensor wires. Note their location
and refer to the Electrical Schematic for your elec-
trical control, pages 48-55.
10. Connect the 2 wires from the new sensor (119) to
the sensor terminals.
11. Close the electrical control box.
12. Coat the sensor with non-silicone heat-sink com-
pound.
13. Slide the o-ring back into the cord grip, then tighten
the cord grip.
14. Slide the sensor (119) into the opening in the fol-
lower plate (101).
15. Tighten the conduit locknut on the sensor.
To replace wires connecting the follower to the
pump, see Manual 310530 or contact your Graco
distributor.
F
IG
. 10: Part No. 244754 shown
107
102
101
113, 114
119
For more information about the follower plate, refer
to pages 26-27.
Summary of Contents for Therm-O-Flow 20
Page 43: ...Parts 309858K 43...
Page 48: ...Electrical Schematic 48 309858K Electrical Schematic Part No 617300...
Page 50: ...Electrical Schematic 50 309858K Part No 617484...
Page 52: ...Electrical Schematic 52 309858K Part No 617485...
Page 54: ...Electrical Schematic 54 309858K Part No 617349...
Page 61: ...Dimensions 309858K 61 15 1 Pump President Air Motor Ram 52 1 in 1323 mm 75 in 1905 mm...
Page 62: ...Dimensions 62 309858K...