145
1
2
3
4 4
4
21
22
23
3
1
57
57
58
Solenoid valve
blocks - 6x2 or
8x2 - suspension
lower
Note: Illustration
spread across 2
pages
If the driver presses the bogie switch to ʻlowerʼ position,
and/or the ECU receives a ʻlowerʼ signal from a height
sensor, the ECU removes +24V from the control solenoids
in Y25 and Y29 - the air bellows solenoids remain
energised.
Air escapes to atmosphere via ports (3).
+24
PORT NUMBERS
1. Air supply from wet tank
3. Exhaust
21. To LH/RH
trailing/pusher bellows
22. To lift axle bellows
23. Plugged
Y29
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