PREVOST LE MIRAGE XLII BUS SHELLS Maintenance Manual Download

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Section 26: XLII SLIDE-OUT

PA1564

with a picking tool (FIGURE 26) from outside
the vehicle. If the acetal plastic blocks are
too hard to reach, slightly extend the slide-
out, the movement of the slide-out should
bring them out.

4. To remove the lower acetal plastic block,

gain access to the compartment under it.
Slide the acetal plastic block toward the
center of the slide-out. Proceed the same
way to reinstall it.

5. Reinstalling the upper acetal plastic blocks.

Fold the wiper seal toward the outside with a
flat tool to ease installation (FIGURE 27).
Tighten the mounting screws to a torque of 7
ft-lb. Leave no gap between the blocks and
the rail.

FIGURE

27:

LOWER

ACETAL

PLASTIC

BLOCK

INSERTION

14 SLIDE-OUT PNEUMATIC

SYSTEM

The slide-out is controlled by a pneumatic and
electrical system. Mainly, the pneumatic system
consists of electrically operated valves that
control slide-out components and safety
operations.

14.1 DESCRIPTION

AIR PRESSURE INLET VALVE

The slide-out air pressure comes from the air
pressure inlet valve on the pneumatic panel in
the front service compartment (figure 28).

INFLATABLE SEAL VALVE

The inflation and the deflation of a seal are done
using a 5-port 2-position manifold valve with two
solenoids. One solenoid is used for inflating of
the seal and the other for deflating of the seal.
When one of the solenoids is activated (seal
deflating valve for example), the valve will keep
its state even if the solenoid is deactivated. The
inflating valve solenoid is activated to re-inflate
the seal when the slide-out reaches its inner or
outer limit. The inflatable seal pressure is set to
10 psi and in full “IN” or full “OUT” position, this
pressure is continuously applied to the seal as
long as the accessory air tank (which supply the
slide-out) is not empty.

VACUUM GENERATOR

A vacuum generator using Venturi principle is
controlled by a 5-port 2-position manifold valve
and is used to evacuate the air faster from the
seal and to ensure that the seal surface does not
stay in contact with the slide-out.

The vacuum generator valve is activated
simultaneously with seal deflating valve solenoid
for 10 seconds. A pressure transducer will detect
a seal, vacuum valve or generator failure if -5
psig is not reached after the 10 seconds delay.
In that situation, an error code will be stored in
the MCD (message center display). In normal
operating condition, -5 psig is a necessary
condition to consider the seal as deflated.

NOTE

When air pressure is relieved using the shut-
off valve, the normal extending and retracting
operation cycle is disabled, because the
pressure transducer reads 0 psig and that is
higher than -5 psig (vacuum). For that reason
the slide-out cannot be moved with the
handheld control.

PREVOST LE MIRAGE XLII BUS SHELLS, Maintenance Manual

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