Power Supply Removal & Replacement; Power Supply Adjustment - Graco PRO AA4500 Instructions-Parts List Manual

SERVICE
Power Supply Removal and Replacement
4. Lubricate the O-ring (37a) and insert the power
sup-
NOTES:
a. To avoid a loss in electrostatic performance, 5. Install the barrel on the handle as described on
ply in the gun handle.
for dirt or moisture. Clean the cavity with a
inspect
the
gun handle's power supply cavity page 32.
clean, dry rag.
Power Supply Adjustment
b. Do not expose seal (1 8e) or O-ring (37a) to
The power supply's lower voltage setting
is
factory set at
solvents as it will damage them. 60 kV, but can be adjusted between 45 and 80 kV. To
adiust the low voltaae settina. use a small blade end
c, Be careful
when handling the
power supply
to sciew
driver to turn t i e poteniiometer (G), clockwise to
fully clockwise is 80 kV, fully counterclockwise is 45 kV.
increase the voltage or counterclockwise to decrease it;
avoid damaging it.
1. Remove the barrel as described on page 31. Refer to Fig 17.
2. Grasp the power supply (18) with your hand. With a
free from the gun handle (i'), then pull
it
straight
out.
gentle side to side motion, pull the power supply
3.
Inspect the power supply for any physical damage.
Check the electrical resistance
as
instructed
on
page 25. 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 piace. See Fig 17.
34 308-294