Nordson 25B - Common Problems; Problem; Pump Fails to Start or Stops While Operating and Fails to Restart

© 2024 Nordson Corporation
1044131-06
5-2
Troubleshooting
Common Problems
Problem Possible Cause Corrective
1. Pump fails to start or
stops while operating
and fails to restart
No compressed air supply, or air pressure too low
Check the air supply at the
drop-leg drain valve. Make
sure the air regulator is
working correctly


component and hose,
working from the spray
device to the pump, as
follows:
1. 󰀨
pump and relieve the
hydraulic pressure.
2. Break the connection.
3. Turn on the air to the
pump. If the pump starts,
the blockage is in the
component or hose
downstream from the
broken connection.
Air valve spool stuck in middle position, or shifter mechanism
damaged
Use a screwdriver to
carefully move the shifter
push rod up or down. If the
󰀨
the compressed air, relieve

remove the safety covers
from around the air motor.
Inspect the shifter
mechanism and repair or
replace any damaged or
bent parts. If the shifter
mechanism is not damaged,
rebuild the air valve.
Check the air supply for
contamination. Rebuild the
air valve if necessary.
Air valve seals worn
Remove and rebuild the air
valve.
Continued...