13
310530
Troubleshooting
For additional trouble-shooting information about the pump, see the pump’s documentation.
Problem
Cause(s)
Solution(s)
Rapid down stroke or up stroke
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 in
supply unit or system documentation.
Foreign object lodged in pump
Remove object and rebuild pump
assembly. See 308570 for pump
rebuild instructions.
WARNING
To reduce the risk of serious injury
whenever you are instructed to relieve
pressure, always follow the
Pressure
Relief Procedure
on page 11.
Before attempting to dislodge a foreign
object:
1.
Relieve system pressure.
2.
Remove the pump from the air
motor.
Pump fails to prime properly
Pump needs to be primed
See
Use of the Bleeder Valve
in
308570.
Wet-cup leaks
Throat seal is worn
Replace throat seal. See
Servicing the
Throat Packings
in 308570
