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Repair
309518P 21
Replacing Solenoids
Follow this procedure to replace a single solenoid.
1. Remove User Interface cover. See page 17.
2. Disconnect two solenoid wires (V) from main board.
F
IG. 16.
3. Remove two screws (S).
4. Remove and replace solenoid (306b).
5. Reassemble. Solenoid wires are polarized (red +,
black –). Refer to Electrical Schematic, page 28.
Replacing Alternator Regulator
1. Remove User Interface cover. See page 17.
2. Remove two screws (309). F
IG. 16.
3. Disconnect supply and exhaust air lines (310).
4. Disconnect solenoid wires 12 position Phoenix con-
nector (306r) from main board. F
IG. 13, page 20.
5. Remove solenoid module (306) with regulator
(306e). F
IG. 16.
6. Unscrew and replace regulator (306e).
7. Reassemble. Refer to Electrical Schematic, page
28.
8. Set regulator to 24 psi (160 kPa, 1.6 bar).
Replacing Alarm
1. Remove User Interface cover. See page 17.
2. Disconnect alarm wires from main board.
3. Unscrew alarm (313) and replace. F
IG. 16.
4. Reassemble. Refer to Electrical Schematic, page
28.
From left to right, solenoid functions are as follows:
• Metering valve A
• Metering valve B
• Pump A
• Pump B
Make sure gaskets (306j, 306k) are in place when
reinstalling solenoid module.
F
IG. 16
V
309
306b
310
306j
S
306
313
Set regulator pressure to 24 psi (160 kPa, 16 bar)
1
1
306k
306e