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859.0089
Repair
Pressure Relief Procedure
1. Shut off the air supply to the pump.
2. Open the dispensing valve, if used.
3. Open the fluid drain valve to relieve fluid pressure.
Have a container ready to catch the drainage.
Repair or Replace Air Valve
Replace Complete Air Valve
1. Stop the pump. Relieve the pressure. See
in previous section.
2. Disconnect the air line to the motor.
3.
For motors with reed switch:
Remove screw to
disconnect the reed switch assembly from the air
valve.
4. Remove screws (109, metal pumps) or nuts (112,
plastic pumps). Remove the air valve and gasket
(108).
5. To repair the air valve, go to
Disassemble the Air
Valve,
step 1, in next section. To install a replace-
ment air valve, continue with Step 6.
6. Align the new air valve gasket (108) on the center
housing, then attach the air valve. See
Torque
Instructions,
page 15.
7.
For motors with reed switch:
Use screw to attach
the reed switch assembly to the new air valve.
Reconnect cable.
8. Reconnect the air line to the motor.
Trapped air can cause the pump to cycle unexpectedly,
which could result in serious injury from splashing.
F
IG
. 1. Reed switch assembly and air line removal
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