Volvo ECS - Drive Axle (Not 4 X2 Tractor); Drive Axle (4 X2 Tractor)

59
ECS Gen. 1
1. Air supply from wet tank
3. Air drain via silencer
21. Air to and from LH drive axle air bellows, and trailing (or
pusher) LH air bellows
21. Air to and from RH drive axle air bellows, and trailing
(or pusher) LH air bellows
23. Air to and from front axle solenoid valve (plugged if rear
air suspension only)
The solenoid block for all variants (except 4x2 tractor)
contains 3 solenoid valves:
- SID 3 the RH valve - air to and from RH air bellows for
drive axle and trailing or pusher axle.
- SID 4 the LH valve - air to and from LH air bellows for
drive axle and trailing or pusher axle.
- SID 7 the ʻcentralʼ valve - operating as a control valve.
Solenoid valve
block - drive axle
(not 4x2 tractor)