Remove The Air Valve Assembly (Double Acting Pumps Only; Special Reassembly Instructions - Nordson ProBlue Flex Product Manual

SP Pump Diagnostics and Repair
B-14

Remove the Air Valve Assembly (Double Acting Pumps Only)

Part 1128350_02
CAUTION! Handle the valve spool and sleeve with care. Damaging the
precision machined surfaces of the spool and sleeve can cause the valve
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
to press the valve sleeve out of the valve body.
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.
Valve spool*
Valve sleeve*
O-rings, P/N 940181
*Available only as part of valve assembly P/N 1006027

Special Reassembly Instructions

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.
S
Check/Repair
Spool lands are nicked,
gouged, corroded, or
dirty
Broken, corroded, or
dirty
Inspect for nicks,
gouges, or swelling
Clean with mineral spirits
or any non-chlorinated
solvent and a soft cloth.
Apply SP lubricating oil
to the lands before
inserting the spool back
into the sleeve.
Clean with mineral spirits
or any non-chlorinated
solvent and a soft cloth.
Apply O-Ring lubricant
during reassembly.
E 2020 Nordson Corporation