310528
29
Heated Pump Troubleshooting
For additional information about the pump, see the pump’s documentation.
Problem
Cause(s)
Solution(s)
Rapid down stroke or up stroke
(pump cavitation)
Material not heated to proper
pumping temperature.
Check and adjust temperature set point.
Air is trapped in pump.
Bleed air from the pump using this pro-
cedure:
1. Place a waste container under the
pump bleed port.
2. Turn on air to the pump
3. Allow material to flow from the bleed
port until it is air-free.
4. Shut off air to the pump and close
the bleed port.
5. Turn air on to the pump and set the
pump air regulator for normal opera-
tion.
Downstroke: Lower check in pump
is worn.
Upstroke: Upper check in pump is
worn.
Rebuild and replace pump, as neces-
sary.
Material leaks around pump outlet Outlet fitting is loose.
Tighten outlet fitting.
Material leaks around bleed port
Bleed port fitting is loose.
Tighten bleed port fitting.
Pump won’t move up or down
Problem with air motor.
See Air Motor Troubleshooting chart on
page 30.
Foreign object lodged in pump.
Remove object and rebuild pump
assembly.
WARNING
To reduce the risk of serious injury
whenever you are instructed to relieve
pressure, always follow the
Pressure
Relief Procedure
(page 21).
Before attempting to dislodge a foreign
object:
1. Relieve system pressure.
2. Remove the pump from the air
motor.
Wet-cup leaks
Worn throat seal
For Therm-O-Flow Mini-5:
1. Tighten wet-cup and/or throat seal
packings.
2. Replace wet-cup and/or throat seal
packings if tightening does not stop
leaking.
For Therm-O-Flow 5, replace wet-cup
and throat seal packings.
Summary of Contents for 918334
Page 12: ...12 310528 Notes...
Page 36: ...36 310528 Service Fig 10 240 Volt Ram Plate Assembly Wiring 9599A 3L1 3L2 3L3 5L1 5L2...
Page 40: ...40 310528 Notes...
Page 44: ...44 310528 Notes...
Page 52: ...52 310528 Notes...
Page 68: ...68 310528 Schematics 617300 Page 2 9605A...
Page 69: ...310528 69 Schematics 617485_1 9606A...
Page 70: ...70 310528 Schematics 617485_2...
Page 71: ...310528 71 Schematics 617484 Page1 9608A...
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Page 73: ...310528 73 Schematics 617349 Page1 9689A...
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Page 84: ...84 310528 Appendix New Style Temperature Controller Settings List...