Nordson ProBlue Flex - Remove the Air Valve Assembly (Double Acting Pumps Only)

SP Pump Diagnostics and Repair
B-14
Part 1128350_02
E 2020 Nordson Corporation
Remove the Air Valve Assembly (Double Acting Pumps Only)
CAUTION! Handle the valve spool and sleeve with care. Damaging the
precisionmachinedsurfacesofthespoolandsleevecancausethevalve
assembly to bind
1. Hold the valve flange in place and carefully pull the spool and bumper
assembly out of the valve body.
2. Place the valve spool on a clean cloth.
3. Remove the valve flange.
4. Remove the two M4 screws holding the upper detent to the valve body.
5. Remove the upper detent and the spring.
6. Use a socket or similar object inserted in the detent end of the valve body
topressthevalvesleeveoutofthevalvebody.
NOTE: The valve spool and sleeve are a matched set and cannot be
exchanged with parts from another air valve assembly. If either the spool
or sleeve is damaged, they must be replaced with a new valve assembly.
CAUTION! Do not scrape the valve spool or sleeve. Clean them with mineral
spirits or other non-chlorinated solvent and a soft cloth. Do not use abrasives.
Check/Repair
Valve spool* Spool lands are nicked,
gouged, corroded, or
dirty
Clean with m ineral spirits
or any non-chlorinated
solventandasoftcloth.
Apply SP lubricating oil
to the lands before
inserting the spool back
into the sleeve.
Valve sleeve* Brok en, corroded, or
dirty
Clean with m ineral spirits
or any non-chlorinated
solventandasoftcloth.
O-rings, P/N 940181 Inspect for nicks,
gouges, or swelling
Apply O-Ring lubricant
during reassembly.
*Available only as part of valve assembly P/N 1006027
Special Reassembly Instructions
S Use the flange to press the sleeve back into the air manifold.
S Apply one drop of lubricating oil to each spool land.
S Ensure that the valve spool slides freely inside the sleeve.