Lippert Components Center Point Suspension - Manual (Page 2)

NON-STANDARD SUB-ASSEMBLY
In specific cases where the side clamping plates
cannot be used
with a nonstandard
size
centerhanger,
an alternative
mounting is
possible. If the
CP2 sub-unit
will fit inside the
hanger, and the
hanger is tall enough, the sub-unit may be mounted without
the side clamping plates if (2) crossbolts are used instead of
(1) (An additionial pair of 9/16” x 12 x 3” grade 8 bolts with
nylock nuts will be needed as only one per sub-unit are
provided). The CP2 sub-unit is designed with two crossholes
in the tower to give Center Point an additional inch in height
adjustment. Both holes can be used for mounting cross
bolts(although not needed in a standard installation).The
additional hole in the centerhanger of the coach frame will
need to be drilled and will correspond with the secondary
adjustment hole. A secondary installation is shown with a
hanger that was only 2.5” wide.
If either the side clamping plates or the (2) crossbolt
method cannot be used because of the size and/or shape of
the centerhanger, it is recommended that the frame hanger
first be changed to the standard size hanger.
Once the Center Point Sub-assembly is properly
positioned and the mounting holes are aligned, install the
retaining cross bolt (provided on the tower of each sub-unit).
This bolt will have to be inserted from the outside, inward.
The air spring on the Center Point Sub-assembly prevents
this bolt from being inserted from the under side of the coach.
You may now tighten both the retaining plate bolts and the
cross bolt. Torque these bolts to 100 foot/pounds.
9. T h e
Center Point
S u b -
assemblies
are pre-
adjusted at
the factory to
insure the
cross shaft
shackle link is parallel to the ground. There are a wide variety
of equalizers being used throughout the industry. Due to the
fact there are so many, it is normally necessary to replace the
original shackles with longer ones. Trailair provides 2 sets of
shackle plates (8 plates each) that offer three different length
settings as well as (8) replacement shackle bolts and (8)
flanged nuts. The check template will give a dimension from
the center of the link eye on the Center Point assembly to the
center of the spring eye on the springs of the coach. Refer to
the EQUALIZER / HANGER FIT-UP ILLUSTRATION
attachment in step one for the “S” dimension measurement
taken at the beginning of the procedure. INSERT THE BOLT FROM THIS SIDE
CP 100046
CP 100056
While the slack adjusters allow for adjustment in the
relationship of the spring position to the frame, it is not intended
to offer a latitude great enough to compensate for the necessity
of replacing shackle mounting plates with those that are longer.
This is due to the design of the Center Point system and the
distances from the riser tower cross bolt to the cross shaft’s
shackle link mounting position, while in ideal conditions.
It is important to use the correct replacement shackle
plates so that the height of the coach does not change more
than 1/2”. The “S” dimension
tells us which shackle to use.
If the “S” dimension is 3” or
less, use the CP 100056
shackle plates. If the “S”
dimension is between 3” and
4” use the CP 100046 shackle
plate (which has two settings)
in the short hole set. In the
short setting, be sure that the
end of the shackle plate with
the extra hole is pointed down
to the ground and not up
toward the frame so that it does
not cause interference with the
operation of Center Point. If the
“S” dimension is more than 4”
use the longer setting of holes
in the CP 100046 shackle
plates.
Upon choosing the
correct shackle plates, the
shackles can be assembled
into the spring eyes and into the
cross shaft shackle links. You
must drive the knurled shank
end of the shackle bolt onto the
shackel plate. Use of a standard bottle jack will be of
assistance in positioning the axle to align the two bolts of the
shackle plate. If a bottle jack is utilized, be sure to position it
under the spring mounting plate, below the axle. When the
two bolts on the
shackle plate
will slide easily
into both, the
cross shaft
shackle link
and the spring
eye, place the
other shackle
plate on the
inside and install the nuts to retain the shackle assembly.
Repeat this process on the other spring.
After securing all shackle nuts and bolts to proper
torque levels (50 ft/pounds), the opposite side of the coach
is ready for the same procedures. Repeat the operations 3
through 9 as described above to install the opposite side.