novaG-A
Manual Service
17/25
1.2 Issue
Ref. NR-00016-ENG
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 component subject to pressure until the pressure has
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.
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 cleaning fluid, remove
all of the o-rings in these components to avoid them being damaged by the cleaning fluid
or the brass brush.
6.
Check the seals of the cartridge and the contact bushing. Replace them if they are worn or
damaged.
7.
Check the metal friction bushing for wear and measure its complete length. Replace it if
the length is under 7 mm.
8.
Grease all of the components and refit them in the cartridge.
9.
Screw the isocyanate cartridge unit into its housing until it blocks. Make sure it is correctly
tightened to avoid product leaks.
10.
Do the same with the polyol
cartridge. (points 5-9).
