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XL-AS20100BM-en-US · 2020-12-21 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Installation Instructions
9. SwingAlign™ Axle Alignment
9.1 Alignment Preparation
1. Pull the trailer in a straight line for a sufficient distance
to ensure that there are no binds in the suspension.
2. Disengage the trailer parking brakes and make sure the
trailer is empty.
3. Manually measure or use an optical device specifically
designed for alignment measuring to determine
the following:
a. Measure the distance from the kingpin to the centerline
of the front axle spindles. It is recommended that the
spindle extensions be utilized.
b. Dimensions A and B
(Figure 15)
MUST be equal to
within 1/8" (3 mm).
c. Measure the distance from the centerline of the front
axle spindles to the centerline of the rear axle spindles.
d. Dimensions C and D
(Figure 15)
MUST be equal to
within 1/16" (1 mm).
9.2 Alignment Instructions
1. Using the measurements per Section 9 Step 3, align
each axle. Align by rotating the alignment bolt head
using a 1-3/8" socket wrench on the front face of the
road-side frame bracket clockwise to move axle forward
(A arrows);
counterclockwise to move axle rearward
(B arrows)
(Figure 16)
. Approximately 250 ft.-lbs.
(339 N•m) will be required.
IMPORTANT:
DO NOT loosen the pivot bolts.
IMPORTANT:
Two (2) scribe lines on the side of
the frame bracket indicate maximum
adjustment for axle alignment. If the
edge of the visible washer touches either
scribe line, the SwingAlign axle alignment
adjustment is “out of stroke.” Inspect and
repair trailer components as necessary
and realign
(Figure 17)
.
IMPORTANT:
The SwingAlign design maintains proper
alignment without welding or without
loosening of the pivot connection. DO
NOT weld alignment bolt or pivot bolts
(Figure 17)
. If connection requires
tightening, use a 1-11/16" socket
wrench and torque to 550-600 ft.-lbs.
(746-813 N•m).
Figure 15
A
A = B ± 1/8" (3 mm)
C = D ± 1/16" (1 mm)
KINGPIN
B
D
C
Figure 16
ALIGNMENT
BOLT
WASHER
“A” ARROWS - AXLE FORWARD
“B” ARROWS - AXLE REARWARD
NOTE: 1/2 TURN OF FREE PLAY
IS ACCEPTABLE
Figure 17
ALIGNMENT BOLT ASSEMBLY
ALIGNMENT PLATES
SCRIBE
LINES
ALIGNMENT BOLT
