User's Manual

54
Date of Origin – 02/01/08
2b. Next check the 1/2” - 20 radius rod clamp bolt, which should be tightened to a dry level of 85 lb-ft.
of torque. The 5/8” - 18 radius rod clamp bolt should be tightened to a dry level of 170 lb-ft of torque.
See Figure 2. If the clamp bold has not been properly maintained, then wear between the radius
rod screw and the eye end may be observed. If so, then the entire radius rod must be replaced.
Simply retightening or replacing the clamp bolt will not correct the problem.
ROCKER BUSHINGS -
3. The recommended torque values for the rocker bushing clamp bolts are different for each
model.
a. If you are working on the 7700 model suspension, the 5/8” -18 rocker step bolts should
be tightened to a dry level of 170 lb-ft of torque. See Figure 3a.
b. If you are working on the 9700 model suspension, the single 1 1/8” - 7 rocker bolt
should be tightened to a dry level of 790 lb-ft of torque. See Figure 3b.
Loose operation of this bolt can result in wear requiring that new components be installed to avoid
structural damage. During your visual inspection, if you observe any visible wear or loosening in
the bushings, it is imperative that you immediately replace the radius rod bushing and bolt. Failure
to replace these components will result in damage to the hanger, spring seat, and/or radius rod.
During your check, if the bolts are loose a detailed inspection of the rocker is important to ensure
that no structural damage has occurred. One way this can be done is by raising the trailer until the
trailer weight is taken off the springs. If the rocker is displaced or if the joint is loose, then the rocker
should be removed and the rocker and/or rocker bushing be replaced. Again, visually inspect the
condition of all rocker/rocker hanger assembly components and replace if visible wear is present.
HANGERS -
4. Check all the spring retainer bolts found in the rockers and rear hangers. A dry value of 50 lb-ft
of torque should be maintained on all of these bolts. See Figure 4.