Master II Gun
Service Manual
13/21
2.0 Issue
Ref. NR-00021-ENG
http://www.gamapur.com/
9.
Use a spanner to hold the end of the shaft of the pneumatic cylinder while you unscrew the
mix chamber. Clean the mix chamber and, if necessary, redo the product holes with a drill.
Make sure the chamber is not scratched or marked.
10.
Replace the chamber if it shows any small fault.
11.
Screw the chamber on to the end of the shaft of the pneumatic cylinder.
12.
Fit the gun block unit by sliding it through the chamber and fixing it to the gun with the
fixing nut.
13.
Turn the isocyanate cartridge clockwise until it blocks.
14.
Turn the polyol cartridge clockwise until it blocks.
15.
Fit the coupling block.
16.
Fit the diffuser.
Side cartridge unit
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.
Perform the Unit Standstill Method with the procedure indicated in the Machine Service
Manual.
2.
Completely close the manual valves of each product by turning them clockwise.
3.
To eliminate the pressure from the gun, press the trigger and project with the gun until the
projection fan begins to narrow.
4.
Disconnect the air supply from the gun.
5.
Unscrew the isocyanate side cartridge by turning it anticlockwise and remove it from its
housing. Clean the housing with gun cleaning solvent and make sure no loose particles
remain inside.
6.
Remove the filter and clean it with gun cleaning solvent.
7.
Make sure the mesh filter is not obstructed. If you see that the mesh is obstructed over
more than 20% of its surface, replace it.
8.
Unscrew the rear stopper from the cartridge and use a screwdriver to press the non-return
unit to remove it from its housing, as well as the contact bushing.
9.
Clean all of the components meticulously to eliminate all product remains using a cloth
dampened with gun cleaning solvent and a brass brush.
10.
Make sure the holes of the filter holder cartridge are not blocked by remains of crystallised
product. If you should see any dirt, clean the communicating drill holes with a drill and a
brass brush.
PRECAUTION!
Use wooden or plastic utensils or a brass brush for cleaning. Do not
use metal utensils that can scratch the surface.
Before cleaning the cartridge housing and contact bushing with solvent, remove all of
the o-rings in these components to avoid them being damaged by the solvent or the
brass brush.
