GAMA Master Series Servicehandleiding - Pagina 18

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Service Manual

Pneumatic cylinder

WARNING:

Before performing maintenance work on the gun, make sure that the unit is

at a complete standstill, that all of the buttons and the main switch are turned off and that

the unit is disconnected from the main power supply. The gun is a component that works

under pressure; no connection must be opened or maintenance work done on

components subject to pressure until the pressure has been completely eliminated.

Unscrew the air cap. Remove the side blocks from the gun block. Clean the contact surfaces

using a cloth dampened with gun cleaning solvent.

Remove the gun block from the gun by sliding it over the chamber. To eliminate the remains of

product, clean the gun block unit using a cloth dampened with gun cleaning solvent. Remove

the o-ring.

Use a spanner to lock the end of the pneumatic cylinder shaft and unthread the mixing

chamber. Clean the mixing chamber and, if you consider it necessary, use a brush to go over

the passage holes.

Remove the cylinder clamp.

Using the snap ring pliers, remove the retaining ring holding the end cap.

Pull hard on the blocking device to remove the whole unit from the cylinder bore. Also remove

the spring and the piston assembly from inside the cylinder.

Using the snap ring pliers, remove the snap ring from the piston shaft and separate it from the

piston.

Check the state of the o-rings of the shaft and piston. Replace them if they are damaged. Apply

a little grease to facilitate the fitting.

Fit the piston by sliding it onto the shaft taking special care not to damage the o-rings. Fit the

retention ring.

Fit the piston assembly into the cylinder bore.

Insert safety stop assembly into the cylinder bore until it passes the insertion groove of the

retention ring.

Fit the retention ring using the snap ring pliers.

18/20

1.5 Issue

Ref. NR-00008-ENG

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