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4- 1 0 REAR -SUSPENSION
VALVE BODY
PLUNGER
RETURN SPRING
SLEEVE ASSEMBLY
ADAPTER
WET TANK
The purpose of the wet tank (or air tank) is
to provide a place where the air, heated during
compression, can cool and water vapor can
condense.
A drain and shop air fill valve is
located at the bottom of the tank .
The wet
tank should be drained at 3-month or 3,000-
mile intervals, or more often if above normal
air compressor operation is encountered .
PRESSURE SWITCH
The air pressure switch is designed to main-
tain air pressure in the wet tank between 100
and 120 psi .
Switch activates at 100 psi and
opens at 120 psi .
SOLENOID VALVES
Air flow in the rear suspension system is
electrically controlled by two solenoid air
valves
on
the
standard
system
and
four
additional solenoid air valves on the optional
Electro-Level System. The two valves on the
standard system are two-way, normally closed
figure 12-Exploded View of Solenoid Valve
valves .
The four additional solenoid valves
are three-way multipurpose valves plumbed to
function either as a three-way normally closed
valve or a three-way directional control valve.
TWO-WAY
NORMALLY
CLOSED
SOLE-
NOID VALVE -a valve in which the single
orifice is closed in the de-energized position
and no flow can exist between the inlet and
the outlet ports (figure 10) .
THREE-WAY VALVE-a valve that has 2
orifices and three ports . One orifice is always
open when the other is closed and one port is
always open to one of the other two ports .
Flow is controlled by electrically opening or
closing either of the two orifices (figure 11) .
PRINCIPLES OF OPERATION
The solenoid valve is an electromagnet so
arranged that when current is applied to the
coil (when the valve is "energized") the plunger
either opens or seals an orifice, therby con-
trolling the flow of air . An exploded view of a
typical solenoid valve is shown in figure 12 .
The solenoid valve has two basic functional
parts:
a solenoid coil and a plunger or
armature .
The coil surrounds the plunger
which has a soft synthetic seal at one end .
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