Volvo ECS - Page 147

147
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57
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58
Solenoid valve
blocks - 6x2 or
8x2 - axle lift
Note: Illustration
spread across 2
pages
If the driver presses the bogie switch to ʻlift axleʼ position, the ECU
energises the control solenoid in (Y25), and control and lift axle
solenoids in (Y29). Air is fed to the lift axle air bellows (58).
Max. air pressure in the lift axle air bellows is 12 bar for a pusher
axle, and 8 bar for a trailing axle.
The ride height is raised by 5 to 8mm.
+24+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