⁄16" ± ⁄32" (0.06" ± 0.03")

1

1

MINIMUM

MAXIMUM

⁄32" (0.03")

3

1

⁄32" (0.09")

TOE-IN NOTES:
1

Toe-in is to be set and adjusted in the normal vehicle unladed configuration. Actual vehicle curb weight on the ground. Toe should be
checked at the tires front and rear tread center, at a distance above ground equal to the tire’s rolling radius.

2

In most instances total toe is set by the vehicle manufacturer or body builder. Consult the vehicle manufacturer for specifications.

Alignment Specifications

50

17730-297

STEERTEK NXT High Capacity Steer Axle System for Autocar® ACX-XPEDITOR™ Vehicles

SECTION 11

Troubleshooting Guide
STEERTEK NXT High Capacity
TROUBLESHOOTING GUIDE
CONDITION

Worn or damaged kingpins and
kingpin bushings

Vibration or shimmy of front axle
during operation

Excessive wear on tires or uneven
tire tread wear

Vehicle is hard to steer

17730-297

POSSIBLE CAUSE

CORRECTION

Dirt in system– contaminated lubricant

Polish and inspect kingpin, replace bushing
and seals, then follow specified lubrication
­procedures

Incorrect lubricant

Lubricate axle with specified lubricant

Axle not lubricated at scheduled frequency

Lubricant axle at scheduled frequency

Incorrect lubrication procedures

Use correct lubrication procedures

Lubrication interval not compatible with
­operating conditions

Change lubrication interval to match operating
conditions

Worn or missing seals

Replace worn or missing seals

Caster out of specification

Adjust caster to specification

Wheels and / or tires out of balance

Balance or replace wheels and / or tires

Worn shock absorbers

Replace shock absorbers per the vehicle
manufacturer’s instructions

Wheel bearing adjustment

Adjust wheel bearing to the vehicle
­manufacturer’s specifications.

Tires have incorrect air pressure

Adjust tire pressure to manufacturer’s
­specification

Tires out of balance

Balance or replace tires

Incorrect axle alignment

Align axles

Incorrect toe setting

Adjust toe-in to manufacturer’s specification

Incorrect steering arm geometry

Repair steering system as necessary

Excessive wheel bearing end play

Check specified wheel nut torque, replace worn
or damaged wheel bearings

Wheel bearing adjustment

Adjust wheel bearing to the vehicle
­manufacturer’s specifications

Low pressure in the power steering system

Repair power steering system

Steering linkage needs lubrication

Lubricate steering linkage

Steering knuckles are binding

Check vertical end play

Incorrect steering arm geometry

Repair steering system as necessary

Caster out of specification

Adjust caster to specification

Tie rod ends hard to move

Replace tie rod ends

Worn thrust bearing

Replace thrust bearing

51

Troubleshooting Guide

STEERTEK NXT High Capacity Steer Axle System for Autocar® ACX-XPEDITOR™ Vehicles

SECTION 12

Torque Specifications
1.
600 ± 20 ft. lbs
(814 ± 27 Nm)

HENDRICKSON RECOMMENDED TORQUE VALUES
PROVIDED IN FOOT POUNDS AND IN NM

4.
35 ± 5 ft. lbs
(47 ± 7 Nm)
3.
800 ± 20 ft. lbs
(1084 ± 27 Nm)

4.
35 ± 5 ft. lbs
(47 ± 7 Nm)

2.
Snap Fit

***12.

9.
60 ± 10 ft. lbs
(81 ± 14 Nm)

5.
637 ± 13 ft. lbs
(864 ± 17 Nm)
6.
50 ± 10 ft. lbs
(68 ± 14 Nm)
8.
487 ± 13 ft. lbs
(660 ± 77 Nm)

7.
Min. 15 ft. lbs
(Min. 20 Nm)

**10.
185 ft. lbs
(251 Nm)

11.
68 ± 7 ft. lbs
(92 ± 9 Nm)

7.
Min. 15 ft. lbs
(Min. 20 Nm)

Torque Specifications

52

17730-297

STEERTEK NXT High Capacity Steer Axle System for Autocar® ACX-XPEDITOR™ Vehicles

STEERTEK NXT High Capacity
HENDRICKSON RECOMMENDED TORQUE SPECIFICATIONS
NO.

COMPONENT

FASTENER
QTY.

*TORQUE VALUE

SIZE

FOOT POUNDS

NEWTON METERS

Frame fasteners are furnished and installed by the vehicle manufacturer. Vehicle manufacturer may use an equivalent HUCK
fastener at frame mount.
WARNING: ENSURE CLAMP GROUP IS ALIGNED PROPERLY PRIOR TO TIGHTENING HARDWARE. FAILURE TO DO SO CAN
CAUSE LOSS OF VEHICLE CONTROL, PROPERTY DAMAGE OR PERSONAL INJURY.
1.

Clamp Group Hex Bolt

8

2.

Axle Seat Liner

2

3.

Axle Collar at the Bolt Head

4

4.

Kingpin Draw Key Nut

4

5.

Knuckle Assembly to Steering Arm

4

6.

Knuckle / Axle Wheel Stop Bolt

2

7.

Grease Zerk

4

8.

Knuckle Assembly to Tie Rod Arm

4

9.

Grease Cap

2

10.

Tie Rod Ends to Tie Rod Arm

2

11.

Tie Rod Tube to Tie Rod Ends

2

12.

Spindle Nut

2

1"-8 UNC
1"-8 UNC
7⁄16"-14

UNC

600 ± 20

814 ± 27

Snap Fit

Snap Fit

800 ± 20

1084 ± 27

35 ± 5

47 ± 7

1"-14 UNF

637 ± 13

864 ± 17

/ " Jam Nut

50 ± 10

68 ± 14

Minimum of 15

Minimum of 20

487 ± 13

660 ± 17

60 ± 10

81 ± 14

58

7⁄8"-14

UNF

½"
/ " Castle Nut

**185

**251

/"

68 ± 7

92 ± 9

***

***

78

58

• All hardware ¼" and greater is Grade 8 with no additional lubrication.
NOTE: * Torque values shown in this publication apply only if Hendrickson supplied fasteners are used. If non Hendrickson fasteners are
used, follow the torque specification listed in the vehicle manufacturer’s service manual.
** Tighten to 185 foot pounds torque, advance nut to next hex face to install cotter pin. DO NOT back off nut for cotter pin
installation.
*** Refer to the vehicle manufacturer for spindle tightening procedure.

17730-297

53

Torque Specifications

STEERTEK NXT High Capacity Steer Axle System for Autocar® ACX-XPEDITOR™ Vehicles

SECTION 13

Reference Material
This technical publication covers Hendrickson Truck Suspension’s recommended ­procedures for
our parts / products. Other components play a major role in overall ­performance and Hendrickson
recommends you follow the specific vehicle manufacturer’s recommendation for care and maintenance. Some recommended procedures have been developed by The Technology & Maintenance
Council (TMC) and Hendrickson supports these recommendations. We have compiled a list of
these below.

TMC
To obtain copies of the following RP’s, video’s, or charts, contact TMC at:
TMC/ATA
2200 Mill Road
Alexandria, VA 22314

Phone: 703-838-1763
website: tmc.truckline.com
online ordering: www.truckline.com/store

IMPORTANT REFERENCES
TMC RP 214B

Tire / Wheel End Balance and Runout

TMC RP 216

Radial Tire Conditions Analysis Guide

TMC RP 219A

Radial Tire Wear Conditions and Causes

TMC RP 222A

User’s Guide To Wheels and Rims

TMC RP 230

Tire Test Procedures for Tread wear, Serviceability, and Fuel Economy

TMC RP 514

Pre-Alignment Inspection

TMC RP 618

Wheel Bearing Adjustment Procedure

TMC RP 620B

Front End Alignment Steering Geometry

TMC RP 708A

Trailer Axle Alignment

TMC RP 642

Guidelines For Total Vehicle Alignment

TMC RP 644

Wheel End Conditions Analysis Guide

TMC RP 645

Tie Rod End Inspection and Maintenance Procedure

Video’s
TMC T0326

Wheel End Maintenance

TMC T0372

Tire Pre-Trip Inspection Guidelines

Other
TMC T0400

Reference Material

Wheel bearing Adjustment Procedure Wall Chart

54

17730-297

STEERTEK NXT High Capacity Steer Axle System for Autocar® ACX-XPEDITOR™ Vehicles

17730-297

55 

www.hendrickson-intl.com

Truck Commercial Vehicle Systems
800 South Frontage Road
Woodridge, IL 60517-4904 USA

17730-297 Rev A 08-18

1.866.755.5968 (Toll-free U.S. and Canada)
1.630.910.2800 (Outside U.S. and Canada)
Fax 1.630.910.2899

Information contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reflected.
© 2018 Hendrickson USA, L.L.C. All Rights Reserved

Printed in United States of America