6-1
25B Air Valve and Air Motor Repair
© 2024 Nordson Corporation
1044131-06
Section 6
25B Air Valve and Air Motor Repair
WARNING:
safety instructions in this document and all other related documentation.
WARNING:
observe this warning may result in serious personal injury.
Introduction
This section contains procedures for:
• Air valve repair
• Air motor repair
NOTE: Item numbers in illustrations match the item numbers in 25B Air Motor and Air
Valve Parts. Lettered parts are parts of the hydraulic section, assemblies not called out
in parts lists, or included only in optional kits.
Air Valve Repair
The air valve can be removed and repaired without removing the pump from its mounting.
When repairing the valve, replace all gaskets and O-rings.
Refer to 25B Air Motor and Air Valve Parts, for information on old style air valves with
poppet spacers.
Tools and Materials Required
The following tools and materials are needed to repair the air valve:
• small and large adjustable wrenches
• English hex wrench set
•
•
• O-ring lubricant (Parker O-Lube or equivalent) (Nordson part 1612251)
• replacement parts or kits (refer to 25B Air Motor and Air Valve Parts)
Air Valve Removal
1.
2. Disconnect the air supply hose and remove the air inlet nipple from the air motor.
3. Remove the two screws and the cover from the air motor.
4. Loosen but do not remove the screws securing the air valve assembly to the air motor.
5.
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