Lippert Components Center Point Suspension - Manual (Page 6)

Direct mounting of air pressure
gauge and access fill valve are
shown.
15. After installing the
components, the poly air lines can
be routed. Make sure the air lines can not rub on the wall of
the coach and create a leak. Install the instructional decal
provided.
ADJUSTMENT INSTRUCTIONS
The principle of the Center Point design is to allow
totally independent axle reaction to road conditions and to
also allow adjustability in equalizing coach height, in side-toside
relationship. The sub-units are assembled at the factory
at with the shackle links pre-set. The ride height of the coach
should be acheived with the selection of the shackle, not
adjusting the
shafts. However,
in some cases the
link eyes need to
be adjusted for
c l e a r a n c e
purposes.
To adjust
the link eye on the
cross shafts, use
a 9/16” wrench to
turn the worm
gear in the slack adjuster. If lowering the coach, it may not be
necessary to have the weight off the the axles. However, if
raising the coach height the weight of the coach will have to
be lifted off the axles to turn the worm gear in the slack adjuster.
ADJUSTMENT POINT
Angles of 30 degrees or less from a horizontal position
are acceptable, in compensating for differences in height. Both
arms on a sub-unit should be equal when adjusting coach
height. Do not exceed 30 degrees of adjustment. Angles
greater than 30 degrees require using different shackle plate
lengths. Do not use a shackle longer than the CP 100056
shackle provided by Trailair.
SETTING AIR PRESSURE
Air pressure levels should be 5 PSI per 1,000 pounds
of coach weight at 70 degrees ambient temperature. This
will vary according to individual personal belongings and
effects that the owner wishes to place in the coach. Once a
satisfactory air pressure (yielding a compliant ride for the
coach) is established, the air pressure gauge will allow quick
and easy verification of operating pressure levels. Always
make sure the fill valve cap is secure so that the seal in the
cap will function properly and assist in sealing the system.
Keep in mind that three natural factors will effect the
air pressure in a self contained air system. The following
conditions will cause the air pressure reading in the gauge to
fluctuate more than 2-3 psi up or down from the conditions
the coach is set at upon installation; A change in altitude of
3000 to 4000 feet or more, a change in temperature of 50
degrees or more and 500 pounds or more of weight differential.
What does that mean? If one or more of these conditions
change for a prolonged period after the initial installation, an
adjustment to the air pressure may be required. If these are
temporary fluctuations, changes in the air pressure are most
likely not needed.
Note that once the coach is moved, the air spring
may return to a position other than centered. This is not
abnormal. It only illustrates the fact that the axles are reacting
to torque of acceleration, deceleration or turning input. The
only way to return to an absolute centered position of the air
spring is to lift the coach and allow the axles to seek a neutral
condition, having no residual torque input.
HELPFUL HINTS
If the system is leaking, add air to 100psi and begin
trouble shooting at the fitting connections with soapy water. If
the leak cannot be traced to a fitting connection, the air gauge
and the fill valve are the most likely pnuematic parts to leak.
The most unlikely component to leak is the air bags themselves
and Trailair recommends checking those last upon a fresh
installation. If the leak cannot be found and fixed, call Trailair
for assistance. Once the leak is found, reset the air pressure to
the setting for your coach.
There is no lubrication required for CenterPoint as it is
designed to perform best dry. The only maintenance would be
for the brass in the link-eyes of the shafts and standard
maintenance required for the spring eyes of the standard
suspension.
For clarity purposes, Center Point is shown in the
manual without the mechanical bag stops that are standard on
the sub-units. This allows Center Point to be operated on your
coach without air in cases where travel is necessary. So if you
have an air leak or a complete loss of air in the system, you can
still travel. It should be noted that prolonged use in this condition
can potentially accelerate the wear of the stop plates. The parts
are easily replaced if overly worn.
A full listing of all replacement parts can be found on
page 5 of the manual on the air line schematic print. Please
contact Trailair for all your replacement parts needs.
TECHNICAL SERVICE:
Direct any and all technical service questions to:
Trailair, Inc Corporate Office.
409 Vandiver West, Bldg 6-201
Columbia, MO 65202
800/998-4238 email: [email protected]
573/446-1086 (fax) www.trailair.com