Eager Beaver 20 Ton XPT, Service Manual

Page: 50 / 59

IMPORTANT: DO NOT OVERTIGHTEN fittings onto the
height control valve. Overtightening the
fittings may damage the valve body.
VALVE MOUNTING/AIR LINE ATTACHMENT
IMPORTANT: Before installing the height control valve,
please review the drawings in the height
control valve kit in order to determine the
proper mounting and assembly.
1. When tightening the lock nuts on the height control
valve mounting studs, DO NOT BACK OUT the
studs from the height control valve body.
IMPORTANT: Loosening the studs may cause the height
control valve to leak.
2. Ports C1 and C2 on the forward and rear face of
the height control valve are the suspension ports.
Attach the air line(s) from the air springs to the C1
and/or C2 port(s) (Figure 1).
3. When using only one suspension port, plug the
unused port with the
1
/
4
-inch NPT pipe plug
provided in the height control valve kit.
4. Attach air supply line from the pressure protection
valve to the supply port on the top of the height
control valve (Figure 1).
5. Install the exhaust fitting into the exhaust port
(Figure 1).
6. Tighten all the lines.
RIDE HEIGHT ADJUSTMENT
1. Determine recommended ride height by locating
and reading the information on the identification
tag; it is on the suspension trailing arm.
2. If necessary, rotate the control arm for the height
control valve up to raise or down to lower the axle
until the distance between the suspension
mounting surface and the axle center matches the
recommended suspension ride height (Figure 2).
IMPORTANT: After setting the ride height, the control
arm must remain in the neutral position.
3. Insert the wooden centering dowel into the control
arm alignment hole and engage into the housing
(Figure 1).
BARKSDALE RIDE HEIHT CONTROL VALVE
FITTING INSTALLATION
1. Apply thread sealant onto the fitting threads, unless
it is already pre-applied.
IMPORTANT: DO NOT APPLY TAPE to the fitting threads;
the tape may cause contamination of the
air system.
2. Install the supply and suspension fittings on the
height control valve.
A-24642
Figure 1. The Barksdale non-delay height control valve
Supply Port
Alignment Hole
Control
Arm
Exhaust Port
Suspension Port C1
Part Number
1 /
4
-20
Mounting
Studs
Suspension
Port C2
(Plug, If
Necessary)
Exhaust Tube
Exhaust Fitting
Figure 2. Ride height adjustment
Suspension Port C1
Supply Port
Exhaust Port
Raise
Lower
Neutral
Position
Exhaust
Position
Fill
Position
Suspension
Port C2 (Plug,
If Necessary)
C1
C2
INSTALLATION and ADJUSTMENT PROCEDURES