- Taking care not to damage the piston, hold the flat part of the piston with a
spanner to prevent rotation, then unscrew the M6 x 12 mm cap screw from
the bottom of the piston. This releases the solenoid seal retainer and valve
seal.
- Discard the old valve seal.
- Clean all oil and dirt off the components with a clean cloth and check that
the bleed hole is not blocked.
- While the solenoid is apart, inspect the solenoid piston centre seal and piston
for wear, scratching or damage. Replace piston if required.
To install new solenoid valve seals:
- Place the new valve seal and seal retainer on the cap screw.
- Taking care not to damage the piston, hold the flat part of the piston to prevent
rotation, and then screw the M6 cap screw into the bottom of the piston.
- Insert a new gas return O-ring.
- Insert the piston back into the solenoid body.
- Insert the solenoid spring.
- Replace the solenoid top O-ring seal.
- Place the solenoid top back on the solenoid body, making sure that the locating
dowel is engaged.
- Screw in and tighten the six cap screws.
- Replace the solenoid coil.
- Re-power and re-gas the dispenser then check for leaks and correct operation of
the valve.
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