Page 2
Installation Instructions
Insert a
suspension
crossmember
(not supplied)
Fig. 4 : Suspension crossmember installed
Fig. 3 : Reinforcing frame
(3)
Welding the hanger is optional (instead of bolting it), but be aware that all paint around welding edges need to be ground off prior to welding. Protect Aeon®
rubber spring from extreme heat generated during welding.
Weld crossmember
to hanger
(4)
When bolting the frame be aware that hollow (tubular) sections of frame may not be sufficiently strong to withstand compression of bolted joints and therefore
may collapse unless they are reinforced; consider fabricating a bracket similar to the one shown in fig 3 which has a clamp plate to go between the nut/head of bolt
and tube. Such bracket must be rigid enough to allow you to apply a full torque to bolts.
(3) (4)
5. Bolt hanger side plate:
(fig. 3): Use holes in the hanger
side plate as a template (3 holes). Drill horizontal holes to the
side of frame at each side of trailer. Use ½ ” UNC Gr 8 bolts,
lock-nuts, and washers to mount hangers to frame (fasteners
are not included). Torque mounting bolts to 90-95 ft-lbs (122-
129 N.m).
6. Do either 6a or 6b (whichever is easier or more practical):
(3)
6.a) Bolt hanger top plate to frame : Hanger top plate must
be in full contact with the frame so that it can be bolted to
frame. Use holes in the hanger top plate as a template and
drill vertical holes (note that two ½”nuts are tack welded
inside hanger . In case frame is not wide enough, hanger top
plate can be bolted to crossmembers of frame instead (as
long as those crossmembers are strong enough). If
crossmembers exists but there is a gap between bottom
surface of crossmembers and top of hanger then steel
spacers (plates) should be used to fill up the gap. Drill
common holes to bolt hanger to crossmembers. Use ½ ”
UNC (grade 8) bolts and washers to mount hanger
top plate to frame (fasteners are not included). Make sure
bolts are long enough the entire length of nuts but they are
not too long to interfere with other parts of suspension in the
hanger. If trailer does not have crossmembers (but frame
main beam itself is sufficiently strong to overcome torsion of
frame) then fabricate an inboard extension and attach it to
the frame. Reinforce it by gussets as necessary (fig. 3)
to make it rigid.
6.b) Skip procedure (6.a) and install a simple suspension
crossmember if one or more of the following applies:
- You are retrofitting axles / suspensions on a standard
trailer;
- The design of the trailer does not allow drilling vertical
holes for bolting hanger top plate;
- Frame could be aluminum; creating frame inboard
extension may not be practical;
- Frame crossmembers may not be located directly above
hanger top plate and modifying or relocating them is not
optional procedure:
Use a 2"x2"x 1/4” (minimum) structural steel tube
section. Measure width of trailer and saw cut a piece to
that length. Slide tube through corresponding opening in
the driver and passenger-side hangers. Drill two holes at
each end and bolt suspension crossmember to hanger
weld it at each end (fig. 4).
7. Remove clamps.
Procedure
:
(Cont.)
Position gussets and
weld them to clamp plate
Drill
vertical
holes
Drill horizontal
holes
Use
stover
flange
nut here
or a
Locknut
and a
washer.
Inboard extension plate
(not supplied)
Weld
1/2” UNC
Fasteners to mount
Suspension / Hanger
to Frame
(not supplied)
Outboard
Inboard
Frame Rail
Hanger
Clamp
plate
(Not supplied)
Clamp
plate
(Not supplied)
TIMBREN INDUSTRIES INC. - 1-800-263-3113 - [email protected]
Typical Installation
