Power Supply Removal And Replacement; Lower Voltage Setting Adjustment - Graco PRO AA5500sc unicarb Instruction Manual

Power Supply Removal and Replacement

NOTES:
D To avoid a loss in electrostatic performance, inspect
the gun body power supply cavity for dirt or mois-
ture. Clean the cavity with a clean, dry rag.
D Do not expose the seal (27d) or o-ring (27a) to
solvents as this will damage them.
1. Prepare the gun for service as instructed on
page 31.
2. Remove the barrel as instructed on page 38.
3. Grasp the power supply (27) with your hand. With
a gentle side-to-side motion, being careful not to
damage the power supply, pull the power supply
free from the gun body (29), then pull it straight
out. See Fig. 44.
4. Inspect the power supply for any physical damage.
Test the power supply electrical resistance as
instructed on page 29. If necessary, replace the
power supply.


Apply a very light coat of lubricant to the o-ring (25a).

Do not expose the seal (27d) or gasket (27a) to solvents.
26
Fig. 44
40 308937
Service
5. Before installing the power supply, inspect the seal
(27d) for any damage or swelling; replace the seal
if necessary. Make sure the gaskets and pads
(27a–27e) are in place.
6. Lubricate the o-ring (25a) and install the power
supply in the gun body.
7. Assemble the gun as instructed on page 42.

Lower Voltage Setting Adjustment

The kV switch, in the manifold, enables you to switch
between full voltage and a lower voltage output. The
lower voltage is factory set at 60 kV, but can be
adjusted between 45 and 80 kV.
To adjust the low voltage setting, use a small blade
end screw driver to turn the potentiometer (W). Turn it
clockwise to decrease the voltage or counterclockwise
to increase it; fully clockwise is 45 kV, fully counter-
clockwise is 80 kV.
27
27e
27b
W

27a

27d
30
27c
V


25a
25b
25
29
03243