The hangers can be located from dimensions given in the suspension manufacturer’s catalog or
the measurements taken as described for retrofits. Hanger spacing is always measured from
the center line of hanger to center line of hanger. Unless otherwise specified, the front and rear
hangers are always located an equal distance from the center hanger. Hanger spacing should
not vary more than +/- 1/16”. Hangers on one side of the frame must be aligned with the
hangers on the opposite side for proper alignment of axles and installation of cross tube braces.
After the positions for the hangers have been located they can be installed as shown on
drawings 83-00855-53.
NOTE:
This load cell assembly is 1 1/8" Ionger than the stock hanger and it is recommended that the
front and rear hangers have spacers added between them and the frame to make up the
difference in height.
Assembly Instruction for Hutch Suspension
On standard model suspensions having one adjustable and one non-adjustable torque arm on
each side, install the non-adjustable torque arm on the curb side and the adjustable torque arm
on the road side. On suspension models utilizing the "No-Hop" feature, two adjustable torque
arms are provided for the rear axle. Torque arms should be assembled to the spring seat with
the nuts facing outward toward the tires. The completed assembly of axles, springs, etc. should
be rolled under the sub-frame or trailer, and the forward ends of the torque arms assembled to
the hangers with nuts facing outward. When supplied, washers should be placed under the
torque arm bolt nuts. The 1" torque arm bolt nuts should be tightened to 350-375 foot pounds
torque.
NOTE:
Torque readings should be taken from the nut only. Torquing bolt head will not produce same
clamping force on bushing as tightening the nut.
Completing the assembly:
Install the 5/8" spring retainer bolts, spacers and lock nuts into the equalizer with the nut facing
to the outside.
Alignment:
After the suspension has been installed under the vehicle, the axles should be properly aligned
to the trailer king pin. Prior to alignment, make certain the suspension is free and loose and has
not been placed in a bind due to sharp turns or unusual maneuvers. Alignment can be
accomplished with an optical device designed especially for this purpose or it can be
accomplished manually in the following manner: Measure the distance from the king pin to the
center line of the spindles on the front axle. It is recommended that spindle extensions be
utilized. As noted in Figure 3, dimensions D & D1 must equal. Alignment can be accomplished
by loosening the torque arm clamp screws on both ends of the adjustable torque arm and
turning the adjustment screw. After alignment has been accomplished on the front axle, tighten
the 1/2" torque arm clamp bolts 45-55 foot pounds torque in order to lock the alignment on the
front axle.
