Maintenance

1

1. AIR OPERATING VALVE DISASSEMBLY

To disassembly the Air Operating Valve, remove the two Hex. Fixing Bolts by using a 4 mm Allen Key.
Remove all 4 O-rings from their seats and replace them if they are worn or deformed.

2

Reverse the main body and proceed with the Lower Adaptor disassembly. (on the SUCTION SIDE of the Pump)
To remove the Lower Adaptor, loosen the 4 Hex. Socket Bolts by using a 5 mm Allen Key and unscrew them by hand.
Dissemble the Lower Adaptor from its seat. (on the SUCTION SIDE of the Pump)
Carefully extract the two Intake Valve Packings from their housings. (on the SUCTION SIDE of the Pump)

3

Reverse the main body to the opposite side (DELIVERY SIDE) and proceed with the disassembly of the Upper Adaptor by loosening the 4 Hex. Socket Bolts by a 5 mm Allen Key.
After removing the all the Hex. Socket Bolts, dissemble the Upper Adaptor from its seat. (DELIVERY SIDE)

4

Carefully extract the two Exhaust Valve Packings from their housings.
Turn over the pump body to allow the disengage of the balls from the Exhaust Valves seats, ensuring they don’t fall to prevent damage.
After taking out the balls, disassemble the Exhaust Valves by pulling up them with your finger.
Carefully remove the Exhaust Valves O’ring from their seats.
Now proceed with the disassembly of the lids by loosening the 6 Hex. Socket Bolts from both sides of the main body, by a 5 mm Allen Key.

5

Carefully remove the Intake Valves O’ring from their seats.
Press down the ball with a screw driver by using stopper of the lid to remove the Intake Valves and the Balls from the lids.

6

Remove the Hex. Nut by loosening it by a 13 mm wrench.
Remove the Hex. Nut and the Spring Washer.
Remove the Diaphragm Holder (OUTER) and the O’ring.
Remove the Diaphragm (OUT) in PFTE.
Remove the Diaphragm (IN) in Rubber.
Remove the Diaphragm Holder (INNER).
Press lightly on the main body to disengage the rod from its housing.
Pull out the Rod from its seat.
Hold flat face of center of the rod with a 12 mm spanner, and loosen the Nut with a 13mm spanner on the side where the diphragm has not been removed yet.
Proceed with the disassembly of the Hex. Nut, and the Spring Washer.
Afterwards with the disassembly of the Diaphragm Holder (OUTER), the O’ring, the Diaphragm (OUT) in PTFE, the Diaphragm (IN) in Rubber, the Diaphragm Holder (INNER) and the Rod.

7

Remove the “Y” packings on both sides of the Rod by sliding out them by hand….
…..and the “O-rings” on both sides of the Rod by sliding out them by hand.
During the assembling, place the “Y” packings to the direction that they open outward.
Pay attention to the assembly direction of the “Y” Packings”.
After replacing all the “Y” packings, lubricate their grooves and the O-rings with lithium grease.