Bridge Rectifier Replacement; Circuit Breaker Replacement - Graco A Series Instructions-Parts List Manual

BRIDGE RECTIFIER REPLACEMENT
(Refer to Fig 171
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 securely.
Be sure
the flat blade of the insulated male con
1. Remove the pressure control cover and screws.
2. Disconnect all wires from the bridge (308) at the ap-
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.
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propriate terminals.
3. Outside the pressure control box on the right sidqare
two screws (331). Loosen, but don't remove:'the
screw near the back of the control box. Then loosen
Route all wires carefully to avoid interference with
the movement of the bourdon tube, circuit board,
and remove the front screw. Slide the bridge out.
or control box cover which could cause a malfunc-
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4. Slide the new bridge
(3081
into the box being sure
the lockwasher
(3331
on the rear screw (331) is lN
FRONT of the bridge. Refer to the Detail in Fig 17. 8. Reinstall the pressure control cover and screws.
tion.
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5. Install the front screw, lockwasher and nut
(332).
NOTE:
The most common ceuse of bridge failure is
a faulty motor. Check the motor before
replacing the bridge to prevent damaging
the new bridge.
rCAU
The lockwashers
(3331
must be in front of the
bridge to avoid overheating which will result in
bridoe failure. Refer to the Detail in Fia 17.
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.
Fig 17
CIRCUIT BREAKER REPLACEMENT
(Sea Fig 17)
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Before doino this orocedure. follow the Pressure it
out of the box.
WARNING
5. Push down on the top of the circuit breaker and pull
the risk of a fluid injection injury, injury from mov-
Relief Procidure warnlng'on page 13 to reduce 6. Install the new circuit breaker in the reverse order of
ing .parts, or electric shock. Unplug the sprayerl
disassembly.
7. Reinstall the pressure control cover and screws.
1. Remove the pressure control cover
and screws.
h
CAUTION
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2. Use a small screwdriver to slide the terminal adapter
breaker
(3091
to the ONlOFF switch
( 3 0 3 1 .
3. Disconnect the single black wire from the circuit
Tighten the circuit breaker nut firmly to prevent
the bourdon tube, which w i ll cause a short.
off the circuit breaker terminal.
Do not allow the circuit breaker contacts to touch
the circuit breaker from turning.
4. Use e 518' socket wrench to loosen the nut and boot
(310) on the circuit breaker bunon.