Graco ULTRA 500 Instructions-Parts List Manual page 24

BRIDGE RECTIFIER REPLACEMENT
(Refer to Fig 17)
) - W A R N I N G -
6. Make aure the bridge is flush with the side of the box
I
Before doing this procedure, follow the Preseure
the risk of e fluid injection injury, injury from mov-
Relief Procedure Warning on page 13 to reduce
ino Darts or electric shock. UmIuo
the sDraverI
I
I I .
. -
. ,
I
1. Remove the pressure control cover and screws.
2. Disconnect all wires from the bridge
WlE)
at
the ap-
propriate terminals.
3. Outside the pressure control box on the right side are
two screws (331).
Loosen,
but don't remove the
acrew near the back of the control box. Then loosen
and remove the front screw. Slide the bridge out.
4. Slide the new bridge (308) into the box being sure
the lockwasher
1 3 3 3 )
on the rear screw (331) is IN
FRONT of the bridge. Refer to the Detail in Fig 17.
end tighten the schwa securely.
7. Connect all wires. Carefully route the wires.
CAUTION
Be sure the flat blade of the insulated male con-
female connector when the connections are
nector is centered in the wrap-around blade of the
made. Improper connections may cause the
sprayer to malfunction.
Route all wires carefully to avoid interference with
the movement of the bourdon tube, circuit board,
or control box cover which could ceuse a mslfunc-
tion.
8. Reinstall the pressure control cover and screws
5. Install the front screw, lockwasher and nut (332).
NOTE: The most common cause of bridge failure is
a faulty motor. Check the motor before
The lockwashers (333) must be in .front of the replacing the bridge to prevent damaging
bridge to avoid overheating which will result in
the new bridge.
bridge failure. Refer to the Detail in Fig 17.
I C
n g 17
CIRCUIT BREAKER REPLACEMENT (See Fig 17)
WARNING
5. Push down on the top of the circuit breaker and pull
Before doino this orocedure. follow the Pressure
it
out of the box.
the risk
o f
a fluid injection injury, injury from mov-
Rellef Procedure wernlngon page 13 to reduce
ing parts, or electric shock. Unplug the sprayer!
6. Install the new circuit breaker in the reverse order of
disassembly.
7. Reinstall the pressure control cover and screws.
1. Remove the pressure control cover and screws.
CAUTION
2. Use a small screwdriver to slide the terminal adapter
3. Disconnect the single black wire from the circuit
4. Use a 5 / 8 ' socket wrench to loosen the nut and boot
off the circuit breaker terminal. the bourdon tube, which will cause a short.
Tighten the circuit breaker nut firmly to prevent
breaker (309) to the ON/OFF switch (303).
(3101 on the circuit breaker button.