novaG-A
Manual Service
10/25
1.2 Issue
Ref. NR-00016-ENG
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 in solvent to clean the
contact surfaces and the seals of the non-return cartridges.
6.
Remove the non-return unit with bottom
filter and the friction bushing unit on the
Polyol side located in the mixing block or
head. Clean the unit with gun cleaning
solvent.
7.
Remove the non-return unit with bottom
filter and the friction bushing unit on the
Isocyanate side located in the mixing block
or head. Clean the unit with gun cleaning
solvent.
NOTE:
To remove the check valve and filter
cartridges, use a flat screwdriver to lever and
remove the assemblies. Be careful not to
damage the O-rings. If for any reason, it is not
possible to remove the cartridges by this
procedure, you can alternatively use a
threaded rod or M4 screw, and use them as
an extractor.
8.
Remove the filters. Clean them carefully with gun-cleaning solvent, making sure that the
mesh is completely free of product remains.
PRECAUTION:
To avoid spilling the rest of the product which has accumulated in the
side cartridges and in the non-return cartridges onto the floor, always remove the
coupling block and the side cartridges on a waste vessel.
9.
Loosen the head by turning the fixing nut anti-clockwise. Turn the head 45º clockwise. Pull
on the head to remove it from the gun body. Clean the block with gun cleaning solvent.
10.
Remove the diffuser and extract the chamber from the rear of the head.
11.
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 that can scratch the contact surfaces.
12.
Fit all the components and put the coupling block in the gun.
STANDSTILL METHOD