Operation
12
311320K
Clean Felt Wiper
1. Insert nozzle of flush can into holes of felt wiper.
2. Saturate felt with gun cleaner.
Initial Set Up
1. Remove coupling block from gun.
2. Check valving rod clearance in closed position. Rod
should extend approximately 1/32 in. (1 mm)
beyond tip of mixing chamber. If it does not, see
Valving Rod Adjustment
procedure, page 20.
3. Adjust valving rod travel to initial setting.
a. Loosen friction lock. Turn valving rod
adjustment screw clockwise until it stops.
b. Turn valving rod adjustment screw 11 turns
counterclockwise.
4. Connect air supply hose to gun.
5. Connect A-isocyanate hose (red-taped) to notched
fitting on coupling block. Then connect R-resin hose
(blue-taped) to fitting without notches on coupling
block.
6. Close both manual valves.
7. Pressurize the A and R chemical hoses and check
for leaks. (Refer to your proportioning system
manual.)
8. Bleed air from chemical hoses:
a. Hold coupling block with exit ports pointed into
disposable container.
b. Open each manual valve to allow trapped air to
escape. Bleed each side until chemical is free of
air.
c. Close both manual valves.
9. Use clean cloth soaked in gun cleaner to wipe clean
coupling block and its mating surfaces.
NOTE:
To avoid accumulation of dirt and other
contaminants, do not apply grease to mating surfaces of
coupling block.
10. Install coupling block to gun block.
11. Proceed with
procedure or
, page 13, procedure as required.
Daily Start-Up
1. Connect air supply to gun,
page 11.
2. Adjust air cap valve,
page 11.
3. Saturate felt in felt wiper with gun cleaner using
flush can.
4. Trigger gun multiple times to ensure valving rod
moves the full travel quickly and freely.
NOTE:
Sluggish valving rod action may result in valving
rod sticking in open position when fluid pressure is
applied. Always have a 5/16 in. nut driver available to
quickly close manual valves on coupling block.
5. Open both manual valves,
, page
F
IG
. 9 Valving Rod (Closed Position)
1/32 in.
Ensure gun is attached to coupling block and air
hose, and the proportioning unit is at desired
temperature and pressure.
