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WARNING
Before doing this procedure, follow the
Relief Procedure W arning on page 24 to reduce
the risk of a fluid injection injury , splashing in the
eyes or on the skin, injury from moving parts, or
electric shock. Unplug the sprayer!
NOTE: The most common cause of bridge failure is
a faulty motor . Check the motor before replac-
ing the bridge to prevent damaging the new
bridge.
1. Remove the pressure control cover.
2. Disconnect all wires from the bridge (308) at the ap-
propriate terminals, using needle nose pliers.
3. Outside the pressure control box are two screws
(331). Loosen, but don't remove the screw nearest
the motor. Then loosen and remove the front screw.
Slide the bridge out.
4. Slide the slotted end of the new bridge (308) into the
box so the lockwasher (333) on the rear screw (331)
is IN FRONT of the bridge. Refer to the DETAIL be-
low.
Fig 27–1
WARNING
Before doing this procedure, follow the
Relief Procedure W arning on page 24 to reduce
the risk of a fluid injection injury , splashing in the
eyes or on the skin, injury from moving parts, or
electric shock. Unplug the sprayer!
Refer to Fig 27–1.
1. Remove the pressure control cover.
2. Use a small screwdriver to slide the terminal adapter
off the circuit breaker terminal.
3. Disconnect the single black wire (306) from the cir-
cuit breaker (309) to the ON/OFF switch (303).
BRIDGE RECTIFIER REPLACEMENT
Pressure
303
310
306
309
308
CIRCUIT BREAKER REPLACEMENT
Pressure
5. Install the front screw (331), lockwasher (333) and
nut (332). Make sure the bridge is flush with the side
of the box and tighten the screws securely.
CAUTION
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 27–1.
6. Connect all wires. Carefully route the wires.
CAUTION
Be sure the flat blade of the insulated male connector
is centered in the wrap–around blade of the female
connector when the connections are 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 cause a malfunction.
7. Reinstall the pressure control cover.
BRIDGE INSTALLATION DETAIL
LOOSEN THIS SCREW
BUT DO NOT REMOVE
SLOTTED
END
4. Use a 5/8 in. socket wrench to loosen the nut and
boot (310) on the circuit breaker button.
5. Push down on the top of the circuit breaker and pull
it out of the box.
6. Install the new circuit breaker in the reverse order.
7. Reinstall the pressure control cover.
CAUTION
Do not alow the circuit breaker contacts to touch the
bourdon tube, which will cause a short. Tighten the
circuit breaker nut firmly to prevent the circuit
breaker from turning.
331
LOOSEN AND
REMOVE
308
333
332
307–786
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