PREVOST GKN AXLES LIMITED KIRKSTALL DIVISION, Руководство по обслуживанию

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Section 16: SUSPENSION
16-13
9.3 Kneeling Sense Switch
The kneeling sense switch is bolted to the same
bracket as for the front height control valve, right
over the steering axle.
FIGURE 15: KNEELING SENSE SWITCH
16032
9.4 Bellows Control and
Bellows Exhaust Solenoid
Valves
9.4.1 Removal and Installation
1. On the right wall of steering compartment,
locate both the bellows control and bellows
exhaust solenoid valves (Fig. 14).
2. Identify hoses and wires to ease reinstallation.
Disconnect solenoid wires and the three flexi-
ble hoses from solenoid valves.
3. Unscrew and remove the control solenoid
valve and exhaust solenoid valve assembly.
Place on a clean working place.
Reverse removal procedure to reinstall.
Caution:
Any cable tie that has been cut
during removal procedure should be replaced
with a new one.
10. HI-BUOY SYSTEM
The purpose of the hi-buoy system is the raise
vehicle body about 4" (100 mm) in order to in-
crease ground clearance to board a ferryboat, to
avoid a curb, etc.. This system can be put into
service during normal vehicle operation.
10.1 Principles of Operation
Refer to the system pneumatic diagram annexed
in the technical publication box provided with the
vehicle.
UP:
The air coming from the control valve on R.H.
lateral console, flows through a quick release
valve, then through double shuttle valves, to finally
supply air springs. The double shuttle valves pre-
vent height control valves from releasing air from
air springs.
DOWN:
The control valve, on the dashboard, cuts off air
supply, so the double shuttle valves allow height
control valves to accomplish their function. Height
control valves release air from air springs until
suspension reaches the normal ride height.
11. LOW-BUOY SYSTEM
The purpose of the low-buoy system is to lower
the whole suspension about 4" (100 mm) in order
to reduce the overall height for low clearances.
This system can be put into service during normal
vehicle operation.
11.1 Principles of Operation
Refer to the system pneumatic diagram annexed
in the technical publication box provided with the
vehicle.
DOWN:
The control valve, on the R.H. lateral console
dashboard, cuts off air supply, so air is released
from air springs. A relay valve prevents height
control valves from supplying air springs.
UP:
The control valve, on the dashboard, supplies air
to close the passage between both the delivery
and supply ports. A relay valve opens and pro-
vides air springs until the suspension reaches the
normal ride height.