Master II Gun
Service Manual
10/21
2.0 Issue
Ref. NR-00021-ENG
http://www.gamapur.com/
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.
Press the blocking device and turn it clockwise to leave it in blocking position or mode
5.
Remove the coupling block from the gun. Use a cloth dampened with solvent to clean the
contact surfaces and the seals of the coupling block.
6.
Remove the non-return unit, filter and contact bushing from the polyol side in the mixing
block. Clean the unit with gun cleaning solvent.
7.
Remove the non-return unit, filter and contact bushing from the isocyanate side in the
mixing block. Clean the unit with gun cleaning solvent.
8.
Remove the filter. Carefully clean the filter with gun cleaning solvent, making sure that
there are no remains of product left in the mesh.
PRECAUTION:
To avoid spilling the rest of the product which has accumulated in the
side cartridges onto the floor, always remove the coupling block and the side cartridges
on a waste vessel.
9.
Remove the central block by turning the locknut anticlockwise. Clean the block with gun
cleaning solvent.
10.
Clean the two contact surfaces of the mix chamber.
PRECAUTION:
Use wooden or plastic utensils or a brass brush for cleaning. Do not
use metal utensils, which can scratch the contact surfaces.
11.
Fit all the components and put the coupling block in the gun.
12.
Remove the stopper and grease the mix chamber with the
greasing pump supplied in the kit with the gun. This will prevent
the cleaning air of the gun from drying the ISOCYANATE
product, and will therefore prevent it from crystallising and
scratching the chamber and the bushing. Fit all the components
and put the coupling block in the gun.
NOTE:
The action of greasing the gun at the end of the day will
avoid maintenance time, as it will not be necessary to dismantle
the chamber each day to clean it.
PRECAUTION:
To avoid possible contamination by product remains on the gun
components, do not swap Isocyanate parts with Polyol parts. The gun has the isocyanate
side marked with the letter A.
If the product hoses still have pressure, follow the Standstill Method
indicated in the Machine Service Manual.
To eliminate the pressure from the hoses with the gun dismantled, put the
product inlet block in a suitable container, remain at a careful distance
and very carefully, very slowly open the manual valves. With pressure, the
product will come out of the top side of the coupling block.
STANDSTILL METHOD
