Power Supply Removal And Replacement; Power Supply Adjustment - Graco 236-030 Instructions-Parts List Manual

Fig. 16

Power Supply Removal and Replacement

NOTES:
a. To avoid a loss in electrostatic performance,
inspect the gun handle's power supply cavity
for dirt or moisture. Clean the cavity with a
clean, dry rag.
b. Do not expose the seal (18e) or o-ring (37a) to
solvents as it will damage them.
c. Be careful when handling the power supply to
avoid damaging it.
1. Prepare the gun for service as instructed on page
29.
2. Remove the barrel as instructed on page 33.
3. Grasp the power supply (18) with your hand. With
a gentle side to side motion, pull the power supply
free from the gun handle (7), then pull it straight
out.
4. Inspect the power supply for any physical damage.
Check the electrical resistance as instructed on
page 27. If needed, replace the power supply.
Before installing the power supply, inspect the seal
(18e) for any damage or swelling; replace if neces-
sary. Also, make sure the gaskets/pads (18a–18d)
are in place. See Fig. 16.
Service
18
18b
G
18a
18e
3
18d
18c
F
37b
5. Lubricate the o-ring (37a) and insert the power
supply in the gun handle.
6. Install the barrel on the handle as instructed on
page 37.
7. Test the gun resistance as instructed on page 26.

Power Supply Adjustment

The KV HI/LO switch, on the back of the gun 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.
The power supply may be equipped with either a
potentiometer or a two position jumper pin. If you have
the jumper pin style, place the pin in either the 45 kV
or 60 kV position. If you have the potentiometer style,
follow the directions below.
To adjust the low voltage setting, use a small blade
end screw driver to turn the potentiometer (G), clock-
wise to increase the voltage or counterclockwise to
decrease it; fully clockwise is 80 kV, fully counterclock-
wise is 45 kV. Refer to Fig. 16.
35
7
37a
37
01953A