859.0089
9
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 Pressure
Relief Procedure in previous section.
2.
Disconnect the air line to the motor.
3.
For motors with reed switch: Remove screw to dis-
connect 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 16.
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 unexpect-
edly, which could result in serious injury from splash-
ing.
F
IG
. 1. Reed switch assembly and air line removal
ti14094a
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