Ranpump A8-PVX, Operating And Maintenance Manual

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7.3 Air valve repair
Tools Required
- 4 mm allen key
- 8 mm wrench
- Philips-head screwdriver
- Lithium-base grease (non-freezing silicone grease)
NOTE: Hold the air valve vertical position if the core is sliding with its own weight in the valve body,
valve z-rings need to be changed.
1- Relieve the pressure.
2- Unscrew the bolts fixing the valve.
3- You will see two taps at the sides of the valve. Push a tap with your finger until the valve core
comes out.
4- Valve core should move in the valve body little bit tightly. If it moves loosely, the teflon rings
must be worn. They must be changed also
5- Make sure you do not damage the teflon o-rings when inserting valve core into the valve
body. Before inserting the core to valve body, grease it slightly with a suitable oil.
6- Valve core must lean against one of the taps. Otherwise, the core does not move.
7- Tighten the screws applying the proper torque from the torque chart. (Fig. 6)
Figure 12a- Air valve repair.
Figure 12b- Pilot valve repair.