Graco ULTRA 1000 Instructions-Parts List Manual page 24

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BRIDGE RECTIFIER REPLACEMENT
(Refer to Fig 17)
1. Remove the pressure control cover and screws.
2.
Disconnect all wires from the bridge (308).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
screw 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 (333) on the rear screw (331) is IN
FRONT of the bridge. Refer to the Detail in Fig 17.
I c A
5.
Install the front screw, lockwasher and nut (332).
The lockwashers (333) must be in front of the
bridge to avoid overheating which will result in
bridge failure. Refer to the Detail in Fig 17.
6.
Make sure the bridge is flush with the side of the box
7. Connect all wires. Carefully route the wires.
and tighten the screws secureiy.
CAUTION
Be sure the flat blade of the insulated male con-
nector is centered in the wrap-around blade of the
female connector when the connections are
made. Improper connections may cause the
sprayer to malfunction.
the movement of the bourdon tube, circuit board,
Route all wires carefully to avoid interference with
or control box cover which could cause a malfunc-
tion.
8. Reinstall the pressure control cover and screws.
NOTE:
The most common cause of bridge failure is
a faulty motor. Check the motor before
replacing the bridge to prevent damaging
the new bridge.
BRIDGE INSTALLATION DETAIL
Flg ' 1 7
"CIRCUIT BREAKER REPLACEMENT
(See Fig 17)
WARNING
I
Before doing this orocedure. follow the Pressure
I
it
out of the box.
5.
Push down on the top of the circuit breaker and pull
!he risk of a fluid injection injury, injury from mov-
Relief Procedure wernlng.on page 13 to reduce
Ing
p a r t s ,
or electric shock. Unplug
the
sprayer/
6. Install the new circuit breaker in the reverse order of
disassembly.
L
7. Reinstall the pressure control cover and screws.
1. Remove the Dressure control cover and screws.
" C A U T I O N
4
2 . Use
a small screwdriver to slide the terminal adapter Do not ellow the circuit breaker contacts to touch
off the circuit breaker terminal. the bourdon tube, which will cause e short.
3. Disconnect the single black wire from the circuit
Tighten the circuit breaker nut firmly to prevent
breaker
0 0 9 )
to the ON/OFF switch (303).
i
I
...
4. Use a 5/8" socket wrench to loosen the nut and boot
(3101 on the circuit breaker button.
24
307-785