SHING REPLACEMENT TOOL BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
BUSHING REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
BUSHING INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 BUSHING REPLACEMENT PROCEDURE
2
L427 E
The descriptions and specifications contained in this
publication are current at the time of printing.
Hendrickson reserves the right to discontinue or
modify its models and/or procedures and to change
specifications at any time without notice.
Any reference to brand name in this publication is
made as an example of the types of tools and
materials recommended for use and should not be
considered an endorsement. Equivalents may be
used.
IMPORTANT NOTICE
Hazard signal words (such as Warning or Caution)
appear in various locations throughout this
publication. Information accented by one of these
signal words must be observed at all times.
Additional notes are utilized to emphasize areas of
procedural importance and provide suggestions for
ease of repair. The following definitions indicate the
use of these signal words as they appear throughout
the publication.
WARNING: Indicates hazards or unsafe
practices which could result in
severe personal injury or death.
Caution:
Indicates hazards or unsafe
practices which could result in
damage to machine or minor
personal injury.
IMPORTANT: Indicates an operating procedure,
practice or condition that is essential to
emphasize.
NOTE: Indicates additional service information not
covered in the service procedures.
Departure from the instructions, choice of tools,
materials and recommended parts mentioned in this
publication may jeopardize the personal safety of the
service technician or vehicle operator.
Always use genuine Hendrickson replacement parts.
Every effort has been made to ensure the accuracy of
all information in this publication. However,
Hendrickson makes no expressed or implied
warranty or representation based on the enclosed
information. BUSHING REPLACEMENT PROCEDURE
3
L427 E
TRI-FUNCTIONAL
®
BUSHING
REPLACEMENT TOOL BACKGROUND
Hendrickson offers two TRI-FUNCTIONAL
®
Bushing
replacement tools: a narrow bushing tool (part
number S-24736) for use with 3
5
/
8
-inch wide
bushings and a standard bushing tool (part number
S-21307) for use with 6¾-inch wide bushings
(figure 1).
The bushing replacement procedure described in this
document applies to both bushing tools. Enough
similarity exists between the two tools so that a
single procedure can be used to describe the bushing
replacement process.
NARROW BUSHING TOOL
The narrow bushing tool is used to remove and
replace pivot bushings on all narrow-bushing
INTRAAX
®
and VANTRAAX
®
suspension systems. The
3
5
/
8
-inch wide bushings on these suspensions are
commonly referred to as TRI-FUNCTIONAL III
Bushings. There are two versions of the TRI-
FUNCTIONAL III Bushing: the original version, part
number D-22845 (no longer available), and the
improved version, part number D-25364 (figure 2).
When the improved TRI-FUNCTIONAL III Bushing was
introduced, new front and rear drive plates for the
narrow bushing tool were also introduced. These new
drive plates have a larger bore to accommodate the
larger diameter inner bushing tube on the improved
TRI-FUNCTIONAL III bushing.
Without these new drive plates, the narrow bushing
tool is only compatible with the original TRI-
FUNCTIONAL III Bushing.
With these new drive plates, the narrow bushing tool
is compatible with both original and improved TRI-
FUNCTIONAL III Bushings.
To obtain the new drive plates, contact your
Hendrickson representative.
For more bushing tool drive plate replacement
information, refer to Hendrickson publication B112,
Drive Plate Replacement Details, (available on
www.hendrickson-intl.com).
Narrow bushing tool (part number S-24736)
for use with 3
5
/
8
-inch wide bushings
Standard bushing tool (part number S-21307)
for use with 6¾-inch wide bushings
Figure 1. Hendrickson TRI-FUNCTIONAL
®
Bushing tools
Original TRI-FUNCTIONAL III Bushing
(Part Number D-22845; no longer available)
Improved TRI-FUNCTIONAL III Bushing
(Part Number D-25364)
Larger diameter
inner bushing
tube
Figure 2. Original and improved TRI-FUNCTIONAL III Bushings
3
5
/
8
"
3
5
/
8
"
Inner bushing
tube BUSHING REPLACEMENT PROCEDURE
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L427 E
3.
Disassemble the pivot connection. Hendrickson
suspensions are equipped with either QUIK-
ALIGN
®
or welded collar style pivot connections.
To disassemble the pivot connection, use one of
the following procedures:
QUIK-ALIGN Style Pivot Connection (figure 4):
a.
Remove the TORQ-RITE
®
nut from the pivot
bolt and remove the pivot bolt from the frame
bracket.
b.
Carefully remove and retain the concentric
and eccentric alignment collars (they will be
reused when the pivot connection is
reassembled with the new bushing).
c.
Discard the pivot bolt, TORQ-RITE nut and
hardened flat washers.
IMPORTANT: Whenever the QUIK-ALIGN style pivot
connection is disassembled or loosened
for any reason, the pivot bolt and TORQ-
RITE nut must be removed and
discarded. A new shear-type pivot bolt
and TORQ-RITE nut must be used for
pivot connection reassembly.
CAUTION:
Failure to follow these pivot
connection assembly procedures
and to properly torque the pivot
connection fasteners could result
in a failed pivot connection and
damage to the axle, suspension
or trailer.
TORQ-RITE
®
nut
Hardened flat washer
Concentric collar
Hardened flat washer
Eccentric collar
Shear-type pivot bolt
Frame bracket
Figure 4. QUIK-ALIGN style pivot connection
STANDARD BUSHING TOOL
The standard bushing tool is used to remove and
replace pivot bushings on all T, HT,* INTRAAX
®
and
VANTRAAX
®
wide-bushing suspension systems. The
6¾-inch wide bushings on these suspensions are
commonly referred to as TRI-FUNCTIONAL (no longer
available) and TRI-FUNCTIONAL II Bushings
(figure 3).
BUSHING REMOVAL
1.
Chock the trailer wheels and exhaust the trailer
air system.
2.
Place a jack under the suspension beam
assembly to provide support when the pivot
connection is disassembled in the following step.
TRI-FUNCTIONAL II Bushing
(Part Number C-21824)
TRI-FUNCTIONAL
®
Bushing
(Part Number C-3558; no longer available)
Figure 3. TRI-FUNCTIONAL
®
and TRI-FUNCTIONAL II Bushings
6¾"
6¾"
* Instead of removing and replacing the bushing on HT250 Y
beam suspensions (both welded collar and QUIK-ALIGN
®
style
pivot connections), the entire bushing assembly gets replaced.
Contact Hendrickson technical service at 800-455-0043 in the
United States or 800-668-5360 in Canada for complete HT250
Y beam bushing assembly replacement details. BUSHING REPLACEMENT PROCEDURE
5
L427 E
Welded Collar Style Pivot Connection (figure 5):
The welded collar style pivot connection is either
clamped together with a Huck fastener or torqued
and tack welded together with a 1
1
/
8
-inch heavy
hex cap screw and nut (figure 5).
a.
Carefully cut or grind the Huck fastener from
the Huck bolt (or the nut from the cap
screw) and remove the Huck bolt (or cap
screw) from the frame bracket.
IMPORTANT: DO NOT remove the alignment weld
(figure 6). On the welded collar style
pivot connection, the bushing can be
replaced without affecting axle
alignment.
b.
Discard the Huck fastener (or the cap screw
and nut).
4.
Using the jack, carefully lower the suspension
beam assembly out of the frame bracket. Discard
the bushing tube spacers.
5.
With the beam assembly lowered, locate the
bushing index mark on the bushing tube
(figure 7).
The bushing index mark is a small dimple or
indent in the side of the bushing tube and is
used along with the bushing position locator to
properly align the bushing within the bushing
tube. When installed, the bushing voids must be
vertically centered when the suspension is at ride
height. By aligning the bushing position locator
with the bushing index mark, proper bushing
orientation is achieved.
6.
Using a square and the bushing index mark as a
reference point, scribe or draw a line on the
outside of the bushing tube (figure 8). This line
marks the orientation of the existing bushing
within the bushing tube and will be used to
properly orient the replacement bushing during
installation (figure 9).
Figure 5. Welded collar style pivot connection
Side view
Back view
Huck
fastener
Heavy hex
cap screw
and nut
Figure 6. Welded collar style pivot connection
DO NOT
REMOVE
(alignment weld)
Bushing
tube
Bushing index mark
Bushing position
locator
Beam assembly
Bushing
voids
Figure 7. Bushing orientation within the bushing tube
REMOVE
(Huck fastener or cap screw) BUSHING REPLACEMENT PROCEDURE
6
L427 E
Figure 10. Applying lube to the hex-head bolt
Figure 11. Applying lube to the thrust bearing
Figure 12. Applying lube to the thrust washers
If the index mark is not visible on the bushing
tube, use the bushing position locator as a
reference for drawing the bushing orientation
line.
7.
Apply extreme-pressure lube (part number S-
21337) to the threads of the hex-head bolt
(figure 10).
8.
Apply extreme-pressure lube to the internal parts
of the thrust bearing (figure 11) and external
surfaces of the thrust washers (figure 12).
CAUTION:
Do not use extreme-pressure lube
on the bushing. It is intended only
for use on the hex-head bolt, thrust
bearing and thrust