64488-002
Front Hanger

Front Hanger Fasteners Service Kit,
Includes Key Nos. 16-18
64105-015
Axle Set
34013-298
One Side
16
21867-006
¾"-16 UNF x 7" Bolt
17
22962-001
¾" Flat Washer
18
30191-000
¾"-16 UNF Nylocknut
19
66510-001
Rear Shackle Bracket Assembly
20
64314-000
Shackle Plate

Rear Shackle Bracket Fasteners Service Kit,

Includes Key Nos. 21-23
60961-872
Axle Set
34013-299
One Side
21
21867-023
¾"-16 UNF x 6½" Bolt
22
22962-001
¾" Flat Washer
23
30191-000
¾"-16 UNF Nylocknut

2
2
2
2

KEY NO. PART NO.
DESCRIPTION

VEHICLE
QTY.

68977-005
Axle Assembly, Includes Key Nos. 24-42
1
24
68976-004M Axle & Kingpin Assembly
1

Upper Steering Knuckle Assembly, Includes
Key Nos. 29-30, 32-33
25
60903-478 Left Hand
1
26
60904-402 Right Hand
1

Lower Steering Knuckle Assembly, Includes Key
Nos. 31-33, 36, 43-44
27
58900-431 Left Hand
1
28
58900-432 Right Hand
1
60961-630
Kingpin Bushing and Roller Bearing Service Kit,

Includes Key Nos. 29-33, 34-35, Loctite
29
33117-000
Grease Zerk
2
30
68687-003
Upper Grease Cap Assembly
2
31
68687-002
Lower Grease Cap Assembly
2
32
58909-001
Kingpin Bushing
4
60961-633
Roller Thrust Bearing Service Kit,
Includes Key Nos. 33-35, Loctite
33
68731-000
Kingpin Seal
4
34
64256-000
Roller Thrust Bearing
2
5⁄8" Socket Head Cap Screw
35
60236-001
4
Not Shown 60937-000
Loctite® (Red) Compound Tube
1
36
64246-000
ABS Sensor Sleeve
2
37
76878-002
Tie Rod Assembly, Drop, Includes Key Nos. 38-40 1

Tie Rod End Service Kits
60961-737
Axle Set, Includes Kits Nos. 60961-739 & -740
60961-739
Left Hand, Includes Key Nos. 38, 41-42
60961-740
Right Hand, Includes Key Nos. 39, 41-42

Tie Rod End, Includes Key No. 40
38
76875-001 Left Hand
1
39
76875-002 Right Hand
1
40
*7⁄8" Castle Nut
2
7⁄8" Flat Washer
2
41
22962-007
42
17800-004
Tie Rod Nut Cotter Pin
2
60961-069
Stop Bolt Service Kit, One Side,
Includes Key Nos. 43-44
43
*½"-13 UNC Square Head Bolt
2
44
*½"-13 UNC Hex Jam Nut
2

2
2
2
6
4
2
1
1

8
8
8
2

2
4
2
2
4

4
8
4

NOTE: * Item included in kit / assembly only, part not sold separately.

17730-319

11

Parts Lists

AIRTEK® for Tiffin Motorhome Chassis
Air Disc Brake Assembly

KEY NO. PART NO.
DESCRIPTION

VEHICLE
QTY.

1
*Bendix® Torque Plate Assembly
Left Hand Part No. K114010

Right Hand Part No. K114011
2
80135-002
¾"-10 UNC x 2.75" Torque Plate Mounting Bolt
3
22962-001
¾" Torque Plate Mounting Flat Washer
4
49842-000
¾"-10 UNC Hex Nut
5
*Bendix Brake Caliper/Caliper Assembly

Left Hand Part No. K097851SC

Right Hand Part No. K097850SC
6
*Bendix Brake Pad Kit No. K129276, Axle Set
(Includes hardware)
7
*Bendix Shear Adapter for the Adjuster,
Part No. 802455
8
*Bendix Air Brake Chamber Part No. K028226
9
SA-13200-2
M20 x 2.5 x 60 mm Caliper Bolt
10
58246-007
M20 Flat Washer

*Conmet® Hub and Rotor Assembly,
Part No. 10083194, Includes Key Nos. 11-16

KEY NO. PART NO.
DESCRIPTION
11

1
1
14
22
8

12
13
14

1
1

15
16
17
18
19

12
12
2

20
21
22

64545-002
A-22930-4
64550-000

VEHICLE
QTY.

*Conmet Hub Bearing Rebuild Kit,
Part No. 10081727
*Conmet Inner Bearing Cup and Cone Assembly,
Part No. 10041905
*Conmet Outer Bearing Cup and Cone Assembly,
Part No. 10041906
*Conmet Wheel Seal and Spacer Kit,
Part No. 10081518
*Conmet Seal Kit Part No, 10045885
*Conmet Rotor Service Kit Part No. 10082074
*Stemco® Hub Cap Part No. 343-4346
2
Includes Key No. 18
*Stemco Hub Cap Gasket Part No. 330-3024
2
5⁄16"-18 UNC x ¾" Hub Cap Hex Bolt with
12
Retaining Washer
ABS Sensor
2
Sensor Clip
2
**Lug Nuts
20

NOTES: * Not supplied by Hendrickson for aftermarket service purposes. Description and part number listed for reference only. For more

information and assistance with service, maintenance and rebuild instructions on these components see below component
manufacturers:
• Bendix 1-800-AIR-BRAKE, customer service option 1, Tech Team, option 2. Online part number support go to:
www‌.‌bendix‌.‌com‌/‌en/servicessupport/partnumbersearch/partnumbersearch_1.jsp
Online technical support training go to: www.brake-school.com
• Conmet Technical and Part Support 800.547.9473 or go to www.conmet.com/general/literature, go to Wheel End Literature,
scroll down to Service Manual, Lit No. 10084476
• Stemco Technical and Part Support 800.527.8492 or go to www.stemco.com

** Not supplied by Hendrickson. Refer to the vehicle manufacturer for more information. Hendrickson is not responsible for
components supplied by vehicle manufacturer.

Parts Lists

12

17730-319

AIRTEK® for Tiffin Motorhome Chassis
SECTION 6

Towing Procedure
ON-HIGHWAY AND ON-ROADWAY
Hendrickson recommends that a vehicle equipped with a STEERTEK NXT axle be towed by the
­following methods (listed in order of preference) for ON‑HIGHWAY or ON‑ROADWAY ­applications.
■■

METHOD 1 — Wheel lift, the ideal towing procedure

■■

METHOD 2 — Towing the vehicle from the rear

■■

METHOD 3 — Conventional axle fork

Please read, understand and comply with any additional towing instructions and safety precautions that may be provided by the vehicle manufacturer.
Hendrickson will not be responsible for any damage to the axle, suspension or other vehicle components resulting from any towing method or fixture not authorized by Hendrickson.
Please contact Hendrickson Tech Services toll-free at 1-866-755-5968 (U.S. and Canada) or send
e­‑mail to: [email protected] with any questions regarding proper towing procedures for vehicles equipped with a STEERTEK NXT axle.
■■

METHOD 1 — WHEEL LIFT

This method provides the greatest ease for towing the vehicle. Lifting at the tires helps reduce the
risk of possible damage to the axle, suspension, and engine components during towing operations, see Figure 6-1.
It may be necessary to raise the vehicle and place a block of wood under the tires to provide
adequate clearance below the axle to locate the wheel lift equipment for towing, see Figure 6-2.
FIGURES 6-1

■■

FIGURE 6-2

METHOD 2 — TOWING VEHICLE FROM THE REAR

This method is preferred when the proper equipment is not available to perform the wheel lift
method and is necessary for wreckers not equipped with an under lift system.
■■

METHOD 3 — AXLE FORK LIFT

This is an alternative method for towing the vehicle, but requires standard tow forks, and designated lift points inside the STEERTEK NXT axle clamp group.
NOTE

17730-319

When lifting a vehicle with an under lift boom, care must be taken not to damage the engine’s oil
pan. Vehicles equipped with a front fairing may require removal of the front fairing prior to towing
to prevent component damage.

13

Towing Procedure

AIRTEK® for Tiffin Motorhome Chassis
■■

Ensure there is sufficient clearance between the oil pan and the boom

■■

Release the tractor brakes

■■

Install safety straps prior to towing the vehicle, it is preferred to use nylon safety straps.
Chains have a tendency to bind and may cause damage to the axle.

1. Use a tow fork with a minimum of 4.5" opening, 2" shank, see Figure 6-2.
2. Install the fork in the boom properly.
3. The proper tow fork location is centered between the locknuts on the axle wraps, see Figure 6-3.
FIGURE 6-2

FIGURE 6-3

OFF‑ROADWAY TOWING METHOD
WHEN A VEHICLE IS DISABLED AND EQUIPPED WITH A STEERTEK NXT AXLE, CARE MUST BE TAKEN TO
ENSURE THERE IS NO DAMAGE TO THE SUSPENSION OR AXLE WHEN TOWING THE VEHICLE. THE USE
OF TOW STRAPS ARE NECESSARY TO TOW A DISABLED VEHICLE FROM A REPAIR FACILITY PARKING LOT
INTO THE SHOP BAY. THE TOW STRAPS SHOULD BE CONNECTED TO THE TOW HOOKS PROVIDED BY THE
VEHICLE MANUFACTURER AT THE FRONT OF THE BUMPER. IF THE USE OF TOW HOOKS IS NOT AN OPTION,
THEN TOW STRAPS MAY BE WRAPPED AROUND THE FRONT STEERTEK NXT AXLE, (SEE FIGURE 6-4) IN A
MANNER THAT IS ACCEPTABLE FOR TOWING THE VEHICLE FROM A REPAIR FACILITY PARKING LOT INTO THE
SHOP BAY. DO NOT USE A TOW CHAIN AROUND THE FRONT STEERTEK NXT AXLE TO TOW THE VEHICLE,
DOING SO WILL DAMAGE THE AXLE AND VOID ANY APPLICABLE WARRANTY, SEE FIGURE 6-4.
■■ NYLON STRAPS OR CHAINS ARE NOT RECOMMENDED FOR ON-HIGHWAY OR ON-ROADWAY

TOWING.

FIGURE 6-4

Towing Procedure

14

17730-319

AIRTEK® for Tiffin Motorhome Chassis
SECTION 7

Preventive Maintenance
Following appropriate inspection procedures is important to help ensure the proper maintenance
and operation of the AIRTEK•STEERTEK NXT system and component parts function to their highest
efficiency. Look and replace any bent, cracked, worn or damaged parts.

HENDRICKSON RECOMMENDED PREVENTIVE MAINTENANCE INTERVALS
VISUAL INSPECTION
■■ The first 1,000 miles (1,609 km)
■■ On-highway – every 25,000 miles (40,000 km) or 6 months, whichever comes first

COMPONENT INSPECTION
■■ Air spring — Look for chaffing or any signs of spring or component d
­ amage.
■■ Clamp group — Check torque on clamp group mounting hardware. Refer to Clamp Group

Re-torque in this section and Torque Specifications Section of this publication.

■■ Fasteners — Look for any loose or damaged fasteners on the entire suspension. Make sure all

fasteners are tightened to the specified torque, see Torque Specification Section of this publication for recommended torque requirements. Use a calibrated torque wrench to check torque
in a tightening direction. As soon as the fastener starts to move, record the torque. Correct the
torque if necessary. Replace any worn or damaged ­fasteners.

■■ Front and rear spring hangers — Check for cracks or loose mounting hardware. Replace

if necessary, see Component Replacement Section of this publication for replacement
procedure.

■■ Hub — Visually inspect the hubcap and any signs of leakage and proper fluid level. Visually

inspect the wheel seal for any signs of leakage. Replace if necessary, refer to component
manufacturer for replacement procedure.

■■ Leaf spring assembly — Look for cracks. Check the front and rear bushings for any wear

or deterioration. Replace spring assembly as necessary. See the Component Replacement
Section of this publication for replacement procedure.

■■ Operation — All steering components must move freely through the full range of motion from

axle stop to axle stop.

■■ Rear spring mount — Check for proper alignment with spring taper and check for proper

torque on rear spring mount fasteners. See Torque Specification Section of this publication for
recommended torque requirements.

■■ Shock absorber — Look for any signs of dents or leakage, misting is not considered a leak.

See Shock Absorber Inspection in this section.

■■ Steering pivot points — Check for looseness at all pivot points. Inspect and lubricate all pivot

points. Refer to the Trouble Shooting Guide Section in the Appendix of this p­ ublication.

■■ STEERTEK NXT Axle — The axle should be free of any nicks or gouges. Inspect for any cracks

or dents on axle.

■■ Thrust washers — Look for any signs of excessive wear to the thrust washers. See Thrust

Washer Inspection detailed in this section.

■■ Tire wear — Inspect tires for wear patterns that may indicate suspension damage or mis-

alignment. See Tire Inspection in this section.

■■ Top pad — Check for cracks or damage. Replace if ­n ecessary, see the Component

Replacement Section of this publication for replacement procedure.

17730-319

15

Towing Procedure

AIRTEK® for Tiffin Motorhome Chassis
■■ Wear and damage — Inspect all parts of suspension for wear and damage. Look for bent or

cracked parts. Replace all worn or damaged parts.

■■ Wheel bearing — Verify wheel bearing end play is within specification, see Wheel Bearing

Inspection in this section.

See the vehicle manufacturer’s applicable publications for other preventative maintenance
requirements.

LUBRICATION INTERVALS
For vehicles equipped with the STEERTEK NXT axle, regular lubrication intervals should be ­followed to
help prevent premature wear to the kingpin bushings and tie rod ends, see lubrication chart below.
NOTE

The recommended service lubrication interval is a guideline, the vehicle may require increased
lubrication interval depending on severity of operation.

TABLE 7-1

STEERTEK NXT GREASING AND LUBRICATION SPECIFICATIONS
COMPONENT
Kingpin Bushings
Tie Rod Ends

GREASING INTERVAL
Maximum of 25,000 miles
(40,000 kilometers) or 90
days, whichever comes first.

Front Wheel Bearing