SL20K Self-Steering Axle and Suspension System Installation Manual
7
9. Mark the location of the mounting holes on
the outside of both suspension frame rails.
10. Inspect vehicle frame rails for any items that
may cause drilling obstructions.
Welding, drilling or bolting through the bottom
flange of the suspension frame or vehicle rails
voids the manufacturer’s warranty.
NOTE
3/4” SAE Grade 8 UNF fasteners required to
attach the SL2065 suspension to the vehicle
frame.
11. Drill
two
13/16”
holes
through
each
suspension rail and vehicle frame rail.
12. Fasten each suspension side rail to the
vehicle
frame
using
the
appropriate
size/grade fastener specified above, flat
washer and lock nut. Use at least 2 bolts per
side.
13. Drill remaining mounting holes per side rail.
See Figure 7 or the supplied suspension
drawing for recommended fastener quantities
and locations.
14. Install the remaining bolts, washers and lock
nuts and tighten cap screws to proper torque.
See “Torque Requirements” on page 13
for
details.
15. Drill a minimum of two 13/16” diameter holes
through the upper air spring mounting
brackets and chassis frame.
16. Fasten each bag plate assembly with two ¾”
SAE grade 8 UNF fine thread cap screws,
flat washers and lock nuts as seen in figure
7.
NOTE
Hangers must be parallel to one another to
ensure proper operation.
FIG – 6 Frame Alignment
