Graco Optimiser 2K 02748 Instructions Manual page 8

Removing and Installing the Fluid Nozzle
Follow this procedure whenever you remove and install
a fluid nozzle. See page 4 to select a nozzle or
needle/nozzle/air cap kit.
1. Follow the Pressure Relief Procedure on
page 7.
2. Remove the air cap ring (12), air cap (19), and air
cap seal (47). See Fig. 5.
3. Trigger the gun while you remove the fluid nozzle
(20) with the gun wrench (35).
1
17
2
20
35
47
12, 19
1
Lightly lubricate baffle o-ring (17)
2
Apply PTFE adhesive to nozzle (20) threads. Trigger gun and
tighten to 125–150 in-lbs (14–17 N m)
Fig. 5
Setup and Shutdown
02757A
CAUTION
Trigger the gun whenever you tighten or remove the
fluid nozzle (20) to pull the needle away from the
nozzle seating surface and avoid scratching it.
4. Apply PTFE adhesive to the threads of the fluid
nozzle (20) you are installing.
5. Lubricate the baffle o-ring (17).
CAUTION
Lubricate the baffle o-ring (17) before installing the
fluid nozzle (20). A dry o-ring will prevent the nozzle
from tightening properly and adhesive may leak
inside the gun.
6. Trigger the gun while you install the fluid nozzle
(20) with the gun wrench (35). Tighten it to 125 to
150 in-lbs (14 to 17 N m).
CAUTION
When tightening the fluid nozzle (20), do not exceed
150 in-lbs (17 N m) torque. Over-tightening can
damage the nozzle, affect the spray pattern, and is
unnecessary to guarantee a seal.
7. Install the air cap seal (47), air cap ring (12), and
air cap (19).