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Replace an Air Control Solenoid
The air control assembly has two solenoids. Replace
the pump or fill solenoid as needed.
1. Access Air Controls. Follow the steps on page 86.
Disconnect the air tubing from the solenoid (503)
getting replaced.
2. Access the Electrical Enclosure. Follow the steps
on page 83. Disconnect the air control electrical
connector from the AMZ board. Remove the
solenoid leads.
3. Remove the nuts (513) with a socket wrench and
remove the solenoid (503).
NOTE: Fittings from the old air control solenoid will be
used with the new air control solenoid.
4. Pull the new solenoid leads through the grommet
into the electrical enclosure.
5. Secure the solenoid (503) to the panel with the nuts
(513).
6. Connect the electrical connector to the AMZ board.
See Electrical Schematics, page 105.
7. Connect air tubing to the solenoid (503).
F
. 76: Air Control Solenoid Wiring (J6)
IG
3A7259C
Hopper Repair
Refer to Hopper Assembly (On-Board Hopper
Models only), page 112.
1. Turn the main power switch (204) OFF.
2. Remove screws (64) and lift the lid off of the
hopper.
3. Loosen the hose clamp (51) around the top of the
venturi (53) and disconnect the hose.
4. Pull the hose through the grommet (41) on the side
of the hopper.
NOTE: Lightly spray the area with rubbing alcohol to
allow the hose to pass more easily through the
grommet.
5. Disconnect the air line between the side of the
hopper and the venturi.
6. Remove the nuts (14).
7. While lifting up the bowl assembly, disconnect the
air line connected to the fitting (50) in the shaker
(42).
8. If necessary, replace the bowl assembly by
transferring the shaker (42) and venturi to the new
bowl assembly and following steps 2 through 7 in
reverse.
NOTE: The bowl assembly comes with the seals
attached.
9. Disconnect the two air lines connected to the
fittings (47) on the outside of the hopper.
10. Unscrew the four studs (38) that have isolators (39)
still attached.
11. Lift the hopper off of the chassis and transfer the
grommets and fittings to the new hopper.
12. Place the new hopper on the chassis and apply
medium strength thread locker on the studs.
13. Thread on the studs (38) with the isolators (39) still
attached.
14. Reconnect the air lines on the outside of the
hopper.
Repair
87
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Troubleshooting
