PREVOST LE MIRAGE XLII BUS SHELLS, Руководство по обслуживанию

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Section 16: SUSPENSION
PA1564
31
11.1 PRINCIPLES OF OPERATION
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
control 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
control 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"
position 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"
position and selector knob to the "DRIVE" posi-
tion, 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.
11.2 MAINTENANCE
Since the kneeling action is issued from both the
air system and electrical system, refer to
Section: 12,
“Brake and Air System” and Section
06, “Electrical System ”.
For diagnosis and understanding of the system,
refer to wiring diagrams, and to the appropriate
air system schematic diagram annexed to
Section 12,
“Brake and Air System” .
12. AIR SYSTEM
The basic air system consists of an air
compressor, tanks, valves, filters and
interconnecting lines and hoses (refer to Section
12, "Brake and Air System" for complete
information). It provides a means for braking,
operating controls and accessories, and
suspension. An air system schematic diagram is
annexed at the end of this Section for better
understanding of the system.
The air coming from the air dryer is first directed
to the wet air tank, then to the primary (for the
primary brake system), secondary (for the
secondary brake system), and accessory (for
the pneumatic accessories) air tanks (Fig. 42).
In addition, an expansion air tank is installed in
series with each air spring.
FIGURE 42: LOCATION OF AIR TANKS
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