Advertisement
COMPRESSOR
A-5560
the right side, air will flow through solenoids
"B", "D" and "F" to the bellows. The air flow
can occur because the 3-way solenoids ("A",
"B", "C", "D") will allow air to pass from the
No. 3 port to the No . 2 port even though they
are not electrically actuated .
This is the
normal air flow of these valves when they are
de-energized .
When leveling requires pressure to be re-
leased
from
the system,
TRAVEL
AUTO
position allows the necessary air flow from the
bellows through the appropriate solenoids to
the exhaust fitting at the height control valve .
Two-way solenoids "E" and "F" are energized
for this demand .
Three-way solenoids "A",
"B", "C" and "D" are de-energized yet will
allow air to pass from the No . 2 to the No . 3
port .
When the vehicle is moving, the center
switch should be in TRAVEL HOLD position,
(with the RAISE-LOWER switches in "OFF") .
In this mode the 2-way solenoids "E" and "F"
Figure 6-Electro-Level Controls Schematic
REAR SUSPENSI ON 4-5
are closed (i.e ., de-energized), trapping air in
the bellows and isolating them from the rest of
the system . This means the only possible areas
of leakage will be the bellows themselves, the
fittings at the solenoids, or the air line running
between .
The same air flow situation exists
when the vehicle is parked and the key is
in
"OFF" .
When the vehicle is in RAISE position, air
flow is different . Solenoids "A" and/or "B" are
electrically actuated.
System pressure no
longer goes through these valves from the No .
3 port to the No . 2 port . Instead, this passage
within each valve is blocked and air must flow
from the No . 1 to the No. 2 port. This means
that the height control valve is now taken
"OUT" of the system .
Air moving through
solenoids "A" or "B" is regulated only by the
rocker switch on the
dash
panel . Air flow will
continue through solenoids "C" and "E" to the
left side bellows or "D" and "F" to the right
side bellows.
In this mode, the two-way
solenoids "E" and "F" are energized also .
Advertisement
