PREVOST GKN AXLES LIMITED KIRKSTALL DIVISION, Руководство по обслуживанию

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Section 16: SUSPENSION
16-14
12. "LEVEL-LOW" LEVELING
SYSTEM (IF APPLICABLE)
The purpose of the "level-low" leveling system is
to adjust suspension in three separate points
(front, rear right and rear left) in order to level
vehicle body. This system can be put into service
when the ignition key is turned to the "ON" posi-
tion, and must be used only when the parking
brake is applied. The "level-low" warning light on
the dashboard indicates that the selector knob is
not in the "DRIVE" position. Level low system
controls are located on L.H. side control panel.
12.1 Principles of Operation
Refer to the system pneumatic diagram annexed
in the technical publication box provided with the
vehicle.
DOWN:
The (front/rear right/rear left) control solenoid
valve supplies air to the (front/rear right/rear left)
five-way three-position air control valve, which
bypasses the (front/rear right/rear left) height con-
trol valve, and opens a passage to allow the air
control and exhaust valve to release air from
(front/rear right/rear left) air springs.
UP:
The (front/rear right/rear left) control solenoid
valve supplies air to the (front/rear right/rear left)
five-way three-position air control valve, which
bypasses the (front/rear right/rear left) height con-
trol valve, and opens a passage to allow the air
control and exhaust valve to supply air to
(front/rear right/rear left) air springs.
DRIVE:
When the ignition key is turned to the "ON" posi-
tion with selector knob in the "DRIVE" position, the
drive control solenoid valve supplies air to all five-
way three-position air control valves, each one
opening a passage to allow height control valves
to accomplish their function.
When the ignition key is turned to the "OFF" posi-
tion and selector knob to the "DRIVE" position, the
air is entrapped between air springs and five-way
three-position air control valves to ensure the
adjusted level will be kept.
Warning:
Never move vehicle with selector
knob in any other position than the "DRIVE"
position.
FIGURE 16: LEVEL-LOW PANEL (STEERING
COMPARTMENT)
16033
13. DRIVE AXLE STABILIZER
RESERVOIR (XL-45
CONVERTED VEHICLE)
The rear stabilizer system makes turning the vehi-
cle easier. The only maintenance is to check oil
level in a reservoir. This reservoir is located in the
rear wheelhouse, before the drive axle (see under
the vehicle). Check oil level every 50,000 miles
(80 000 km) or once a year, whichever comes
first.