HN
®
FR Series
17730-285
21
Alignment & Adjustments
6. Adjust shim thickness to move the axle in the desired direction, see Figure 7-3.
EACH EQUALIZING BEAM END BUSHING HAS ONE INBOARD AND ONE OUTBOARD ALIGNMENT
SHIM, FOR A TOTAL OF FOUR SETS OF TWO ALIGNMENT SHIMS PER SUSPENSION. EACH SET OF
ALIGNMENT SHIMS MUST BE INSTALLED IN THE SAME ORIENTATION ON ALL OF THE FOUR BAR
PINS. EACH OF THE FOUR EQUALIZING BEAM END SHIM LOCATIONS CAN DIFFER IN ORIENTATION.
SEE FIGURE 7-2. FAILURE TO FOLLOW THESE WARNINGS MAY RESULT IN THE FRACTURE OF EITHER
THE AXLE BRACKET OR BAR PIN WHICH COULD RESULT IN THE LOSS OF VEHICLE CONTROL AND
POSSIBLE PERSONAL INJURY OR PROPERTY DAMAGE.
THE BAR PIN ALIGNMENT SHIM (P/N 50130-000) MUST BE INSTALLED WITH THE FOLDED EDGE
FACING AWAY FROM THE BUSHING, SEE FIGURE 7-5. FAILURE TO DO SO MAY RESULT IN SHIM DAMAGE,
IMPROPER ALIGNMENT, DAMAGE OR FRACTURE OF THE AXLE BRACKET OR BAR PIN WHICH COULD
RESULT IN THE LOSS OF VEHICLE CONTROL AND POSSIBLE PERSONAL INJURY OR PROPERTY DAMAGE.
7. Install new end bushing fasteners and tighten to:
■
At the
locknut
to 450-600 foot pounds torque, or
■
At the
bolt head
to 500-650 foot pounds
8. Remove support and lower the vehicle.
9. Verify the axle’s alignments are within the vehicle manufactures tolerance.
10. Set brakes and remove wheel chocks.
BAR PIN ALIGNMENT SHIMS
The following service notes will help when performing Hendrickson equalizing beam bar pin alignment
■
The standard alignment shims supplied with each sus-
pension (P/N 50130-000) have two
3
⁄
16
" legs and a
3
⁄
8
"
back, see Figure 7-5. Rotating the shim pairs 90° will
change the axle alignment in ±
3
⁄
16
" increments. If finer
adjustments are required use an optional alignment
shim (P/N 50131-000). This alignment shim has one
1
⁄
8
" leg, one ¼" leg, and a
3
⁄
8
" back. A total of ¾" adjust-
ment is achievable to the axle. An optional
3
⁄
8
" flat shim
is also available (P/N 57026-000), see Figure 7-5.
FIGURE 7-5
■
Shim thickness of
1
⁄
16
" increases 0.10° of thrust angle.
■
To accomplish a thrust angle adjustment rotate the
alignment shims on the bar pin of the end bushing.
Axle movement will be in the direction of the shim
thickness increase
■
Axle thrust angle may be adjusted at either wheel end
on an axle. If insufficient adjustment is available at
one wheel end, the opposing wheel end will also need
to be adjusted, but in the opposite direction.
Part Number
50130-000
Part Number
50131-000
Part Number
57026-000
3 16
/ " Leg
1 8
/ " Leg
NOTE:
Folded edge in 50130-000 shim
must be positioned away from bushing
3 8
/ " Leg
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]