Single Acting Pump Diagnostics - Nordson ProBlue Flex Product Manual

SP Pump Diagnostics and Repair
B-6

Single Acting Pump Diagnostics

Problem
1.
Pump not stroking
2.
Pump strokes erratically
with reduced output
3.
Pump leaks adhesive
from between the piston
shaft and hydraulic
body
4.
Pump leaks adhesive
from between the pump
frame and manifold
Part 1128350_02
Table B-2 Single Acting Pump Diagnostics
Possible Cause
Pump not turned on
No 24V DC provided to solenoid valve
No air pressure
Applicators not firing
Tank is empty
Isolation valve is closed
Tank drain is clogged
Siphon check valve is loose,
damaged,or dirty
Pressure check valve is loose,
damaged or dirty
Piston shaft seal is worn or damaged
Damaged or missing O-rings on pump
body
Pump is not fastened to manifold
Corrective Action
Turn on pump at the user interface.
Check for customer-provided 24VDC at
solenoid valve.
Check gauge or display for air pressure.
Adjust air pressure at regulator.
Check for air pressure at supply
connection.
Check regulator for proper operation.
Check solenoid valves for proper
operation.
Check applicators.
Fill the tank.
Open the isolation valve.
Remove the tank strainer if equipped and
clear the drain.
Inspect and repair the siphon valve valve.
Inspect and repair the pressure check
valve located in the filter manifold.
Replace the seal.
Replace the pump body O-rings.
Fasten the pump to the manifold with the
two screws.
E 2020 Nordson Corporation
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