Master II Gun
Service Manual
15/21
2.0 Issue
Ref. NR-00021-ENG
http://www.gamapur.com/
Trigger and valve
WARNING:
Before carrying out maintenance work on the gun, make sure that the unit
has been completely stopped, that all of the push buttons and the main switch are turned
off and that the unit is disconnected from the main power supply. The gun is a
component which works under pressure. No connection must be opened or
maintenance work be done on components subject to pressure until the pressures have
been completely eliminated.
1.
Remove the coupling block.
2.
Use a cloth dampened with solvent to clean the contact surfaces and the seals of the
coupling block.
3.
Disconnect the air hose supply.
4.
Unscrew the trigger stop bolt.
5.
Remove the retention nut and extract the screw holding the trigger.
6.
Unscrew the nut of the trigger valve.
7.
Remove the trigger shaft and hold it carefully for the end with a few pliers to extract it from
the hole. The trigger shaft has a spring in the base. Make sure you do not lose it.
8.
Check the o-rings of the trigger shaft. Replace them if they are damaged. Apply a little
grease to make assembly easier.
