Hendrickson Hxl5 Manual

TECHNICAL

PROCEDURE

TRAILER SUSPENSION SYSTEMS

HXL5®WHEEL-END SYSTEM

SUBJECT: Hub Maintenance Procedures

LIT NO: T72007

DATE: March 2018 REVISION: A

2T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

TABLE OF CONTENTS

Conventions Applied in this Document��3

Explanation of Signal Words ��3

Important Safety Notices ��3

Links��3

General Service Notes��3

During Service: ��3

Contacting Hendrickson��4

Relative Literature ��4

Preparing Trailer for Service��5

Introduction��5

ADB Hub and Rotor��6

Tools Required ��6

Inspection��6

Checking for Seal Leaks��7

Checking for Smooth Rotation ��7

Checking End Play��7

Removing and Installing Hub ��9

Hub Removal ��9

Spindle Preparation��10

Preparing hub for re-Installation��10

Installing Precision spindle nut system ��12

Inspecting Hub Installation�� 13

Install Hubcap��13

Completing Installation��14

Additional Information�� 14

Hub SF Grease Dam ��14

Torque Values��14

Wheel Stud Removal and Installation Procedure��14

LIST OF TABLES

Table 1. Relative wheel-end literature �� 4

Table 2. List of required tools �� 6

Table 3. HXL5®Wheel-end fastener torque values�� 14

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

CONVENTIONS APPLIED IN THIS

DOCUMENT

This section explains techniques used in this document

to convey important information, safety issues, how to

contact Hendrickson and how to apply hyperlinks�

EXPLANATION OF SIGNAL WORDS

Hazard signal words (such as DANGER,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 denitions comply with ANSI Z535�4 and

indicate the use of safety signal words as they appear

throughout the publication�

DANGER: INDICATES IMMEDIATE HAZARDS

WHICH WILL RESULT IN SEVERE

PERSONAL INJURY OR DEATH.

WARNING: Indicates hazards or unsafe practices

which could result in severe personal

injury or death.

CAUTION: Indicates a hazardous situation which,

if not avoided, could result in minor

or moderate injury.

NOTICE: Indicates hazards or unsafe practices

which could result in damage to

machine or equipment.

IMPORTANT: An operating procedure, practice or

condition that is essential to emphasize�

Safety alert symbol used to indicate

a condition exists that may result in

personal injury or harm to individuals� It

must be applied to DANGER,WARNING

and CAUTION statements, which

emphasize severity�

IMPORTANT SAFETY NOTICES

Safety and precautionary statements are listed in

Hendrickson literature number T12007 and available at

www�Hendrickson-intl�com/TrailerLit�

Warnings and cautions should be read carefully to

help prevent personal injury and to assure that proper

methods are used� Improper maintenance, service or

repair can cause damage to the vehicle and other

property, personal injury, an unsafe operating condition

and potentially void the manufacturer’s warranty�

LINKS

Links are identied by a dark grey line under the linked

text� Internal links allow the reader to jump to a heading,

step or page in this document� External links open the

website or document referenced�

GENERAL SERVICE NOTES

Proper installation, maintenance, service and repair is

important to the reliable operation of the suspension

system�The procedures recommended by Hendrickson

and described in this publication are methods of

performing inspection,maintenance,service and repair�

Before you begin:

Read, understand and comply with:

• All instructions and procedures�

• All signal word (CAUTION,WARNING and DANGER)

statements to help avoid personal injury or property

damage�

• Company’s maintenance, service, installation and

diagnostic practices�

• Vehicle manufacturer’s safety instructions when

working on the vehicle�

• Vehicle manufacturer’s instructions for recommended

practices not described in this manual�

• Local safety regulations�

DURING SERVICE:

• Work must be carried out by trained personnel�

• Sudden release of parking springs (e�g�the spring

brake part of the brake chamber or the brake return

spring) may cause injury�

• Use recommended tools only�

• Before releasing trailer back into service,perform

operational checks and test the trailer to ensure

brakes are working correctly�

Hendrickson reserves the right to make changes and

improvements to its products and publications at any

time�Consult the Hendrickson website

(www�hendrickson-intl�com) for the latest version of this

manual�

NOTICE: Accessory-type hubcaps, such as

the chrome“top hat” style hubcap,

can potentially increase wheel-end

temperatures during operation and

are not recommended for use on

Hendrickson extended-service wheel

ends.

4T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

CONTACTING HENDRICKSON

Contact Hendrickson Trailer Technical Services for

technical assistance as needed�To do so, several

options are available�Technical Services must be

contacted before performing any warranty related

service�

Prior to contacting Technical Services, it is best to

have the following information about the vehicle and

Hendrickson suspension available (all that apply):

• Suspension ID Tag information (Refer to Hendrickson

Literature Number L977 Trailer Suspension and Axle

ID Guide, for ID tag location and details):

− Suspension model number

− Suspension serial number

− Approximate number of suspension miles

• VIN plate data� Refer to trailer OEM manual for VIN

plate location�

− Trailer Type (van, reefer, at bed, etc�)

− Manufacturer

− VIN (vehicle identication number)

− In-service date1

• If applicable,description of the system problem, part

number and/or part description of the reported non-

functioning part�

− Date of problem

− Where applicable: location of problem on

suspension / trailer (e�g�,road side,front axle,

rear axle, curb side rear, etc�)

− Symptoms-

» Systems, components or function affected by

the problem�

» When does the problem occur?

» How often does the problem occur?

» Etc�

• Any troubleshooting and/or measurements have

been performed�

• Digital photos of suspension and damaged areas�

• Special application approval documentation

(if applicable)�

To contact Hendrickson Trailer Technical Services, use

the following e-mail address:

HTTS@Hendrickson-intl�com

1 If the in-service date is unknown or not available,the vehicle date of

manufacture can be substituted�

PHONE

Contact Hendrickson directly in the United States at

866-RIDEAIR (743-3247)� From the menu, select:

• Technical Services/Warranty for technical

information�

• Other selections include:

− Aftermarket Sales for replacement parts

information and ordering�

− Original Equipment Sales for parts inquiries and

ordering for trailer manufacturers�

RELATIVE LITERATURE

If you suspect your version of this or any other

Hendrickson manual is not“Up-to-Date”,the most

current version is free online at:

www�hendrickson-intl�com/TrailerLit

Available Hendrickson documentation can be viewed

or downloaded from this site�All Hendrickson online

documentation are PDF les that require Adobe Acrobat

Reader to open�This is a free application downloadable

from Adobe’s home page (http://get�adobe�com/

reader/)�

Other relative literature may include:

NAME DESCRIPTION

L578 Preventive Maintenance Guide

L583 Comprehensive Warranty Statement

L974 Drum Brake Maintenance Procedures, heading

“RETRACTING THE BRAKE SHOES OR SLACK ADJUSTER

CONTROL ARM(S)”

T71004 Hub and Rotor Assembly and Caliper Mounting

Procedures

T70005 Trailer Decal: HXL5®Wheel-End ID

T70006 Hubcap Decal: HXL5®Wheel-End ID

T71005 Poster: PRECISION Nut Installation Procedures

T77001 PRECISION320®Nut Compatibility

T77002 PRECISION240®Nut Compatibility

T82006 Stud Replacement Procedure

Table 1: Relative wheel-end literature

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

PREPARING TRAILER FOR SERVICE

Information for trailer preparation, safety and

precautionary statements,refer to Hendrickson literature

number T12007, available at www�Hendrickson-intl�

com/TrailerLit�

NOTE: DO NOT service a suspension or any

components that is under warranty without

rst contacting Hendrickson Technical Services�

Refer to CONTACTING HENDRICKSON for details�

WARNING: Do not work under a trailer supported

only by jacks. Jacks can slip or fall

over, resulting in serious personal

injury.Always use safety stands to

support a raised trailer.

INTRODUCTION

The HXL5® Hendrickson Extended-Life 5-year System™

hub assembly (front cover and Figure 1) comes pre-

assembled, adjusted and lubricated from Hendrickson�

Because Hendrickson controls the assembly, internal

cleanliness,bearing adjustment and seal installation

in our facilities, we can offer premium performance

and an extended-service warranty on these wheel-end

assemblies�

The eld serviceable HXL5 wheel-end features

Hendrickson authorized components:

• Ductile iron, aluminum or Dura-Light Hub®and

premium seal�

• Synthetic semi-uid grease (Chevron Delo®

Synthetic Grease SF)�

• Hendrickson’s PRECISION 240®Nut System (on

HN spindle) or PRECISION320®Nut System (on HP

spindle)�

DO NOT remove the hubcap or attempt any kind of eld

service without rst CONTACTING HENDRICKSON Trailer

Technical Services� Wheel-end repairs performed

prior to contacting Hendrickson Technical Services

voids the warranty. Refer to L583 for details.

NOTE: Hendrickson recommends HP spindle type for

offset super single tire applications� Refer to

Hendrickson literature number L846 Wide Base

Tire Congurations for more details�The HN

spindle design is not approved for use with any

offset single wheel�

HN spindle

HP spindle

Outer bearing

PRECISION240 or

PRECISION320 interlock washer

PRECISION240®or

PRECISION320®spindle nut

HXL5®hub:

Aluminum,

Ductile iron or

Dura-Light Hub®

Lock washer

retaining screws

(Button-head cap screws)

Inner bearing

Hub seal

Hubcap gasket

Hubcap

Lube ll port

Figure 1: HXL5® Hendrickson Extended-Life 5-year System™ wheel-end parts identication

6T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

ADB HUB AND ROTOR

For air disc brake (ADB) systems, the caliper must

be removed before removing the hub and rotor

assembly� ADB rotor and caliper mounting is dened in

Hendrickson literature number T71004 Hub and Rotor

Assembly and Caliper Mounting Procedures� Original

mounting hardware must be discarded,once removed,

and replaced with new hardware during reassembly�

Procedures for service and repair of Hendrickson’s

MAXX22T™ ADB can be found in Hendrickson literature

number T72009� For component replacement and

repair of ADB systems and rotors manufactured by other

vendors, links to Bendix, ConMet, Haldex and Wabco

literature is available at

www�hendrickson-intl�com/TrailerLit�

TOOLS REQUIRED

The following tools may be required during the

performance of some maintenance procedures:

TOOL WHERE USED

Torque Wrench

(10 - 200 ft� lbs� or

13 - 271 Nm)

To be used with sockets listed in

this table�

HN 313/16 inch socket

INSTALLING PRECISION SPINDLE

NUT SYSTEM on page12

5/32 inch hex key

HP 47/8inch socket

3/16 inch hex key

1/2inch socket INSTALL HUBCAP on page13

1/4or 5/16 inch hex key Lube ll port plug (Figure1)

Dial Indicator, with mounting

stand (resolution to 0�0001",

0�002 mm)

End-play measurement (Figure4

on page8)

HUB SF GREASE DAM TEMPLATE

on page15

HUB AND OUTER BEARING

ASSEMBLY on page11

Table 2: List of required tools

IMPORTANT: Torque (Table 3 on page14) cannot

be properly applied with an ordinary

wrench�A calibrated torque wrench must

be used to tighten fasteners to specied

values�

INSPECTION

At regular intervals, the HXL5®hub assembly should be

checked for seal leaks and smooth rotation�

WARNING: Prior to performing inspection

procedures, help ensure conditions

are safe by following section

PREPARING TRAILER FOR SERVICE.

NOTE: Recommended inspection intervals are based

on an average trailer usage of 100,000

miles (160,000 km) per year� Higher usage

would require more frequent inspections�

Refer to Hendrickson literature number L578

Suspension Preventive Maintenance Guide for

more details�

Inspections should be performed:

• Daily pre-operation check�This would include a

general walk around to check for signs of obvious

damage,wear or other abnormalities�

• Every month, visually inspect back of the hub and

the hubcap for leakage� Refer to the section titled

CHECKING FOR SEAL LEAKS for complete inspection

details�

• Every three to four months:

− Perform monthly inspection�

− Check for smooth rotation�

» Refer to the section titled CHECKING FOR

SMOOTH ROTATION for details�

» If assistance is required or the hub feels

rough, sounds noisy or does not rotate freely,

refer to CONTACTING HENDRICKSON Technical

Services department for further assistance�

• During brake service - at this time, wheels are

removed making it easy to perform quarterly

inspections�

Refer to Hendrickson literature number L578 for

additional recommended suspension inspection

procedures�

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

CHECKING FOR SEAL LEAKS

The HXL5 hub assembly is lled with Chevron Delo®

Synthetic Grease SF at the factory during the

manufacturing process�The grease is contained in the

hub by the hub seal where leakage can occur (Figure 1

on page5)�

Figure 2: Check back side of hub for grease seal leak

To check for leaks, look at the inboard side of the hub,

(Figure2)�A small amount of grease may be visible at

the hub seal� This is a normal occurrence and does

not necessarily indicate a seal leak�Wipe clean�

Hub seal

Spindle seal

journal Hubcap

gasket

Outboard

side

Inboard

side

Figure 3: Areas where leaks may occur

A small amount of grease may also appear at the

spindle bearing shoulder to hub joint (Figure3) This

is also normal and does not necessarily indicate a

seal leak� It should be wiped clean to minimize any

accumulation of dirt�

NOTICE: Pressure or steam washing should be

avoided in this area as water could

be forced past the seal and degrade

lubricant performance and corrode

bearings.

If the hub seal is leaking, a large quantity of grease will

be present in the areas of the hub, spindle hubcap and

wheel� If you see this condition,refer to CONTACTING

HENDRICKSON Technical Services for guidance on how

to proceed�

CHECKING FOR SMOOTH ROTATION

Many factors can effect smoothness of rotation� Primary

causes include:

• Bearing wear

• Damaged hub seal

• Debris

NOTE: A reasonable assessment can be performed

without removing tires and rims�However, this

procedure is best performed with hub only as

shown in Figure5 on page8�

1� Ensure trailer is secure per PREPARING TRAILER FOR

SERVICE on page5�

2� Disengage brakes and remove brake drum

(recommended)�

3� While maintaining physical contact,slowly rotate

hub in both directions at least ve revolutions�

4� During rotation, ensure smooth and quiet rotation�

The bearings should move smoothly� Feel for any

resistance in movement�Any debris in bearings

should be felt as it moves over rollers in bearings�

IMPORTANT: If bearings feel rough, sound noisy or

DO NOT rotate freely, DO NOT place the

suspension back into service�Refer to

CONTACTING HENDRICKSON Technical

Services for guidance�

CHECKING END PLAY

This procedure must be performed:

• After CONTACTING HENDRICKSON Technical Services,

before removing the hubcap (as stated on hubcap

label), for guidance relative to suspected wheel end

play movement�

• As part of INSPECTING HUB INSTALLATION on

page13�

1� If not already done so:

A� Perform PREPARING TRAILER FOR SERVICE on

page5�

B� Remove wheel (tires and rims)�

C� Disengage brakes�

D� If drum brake, remove drum (recommended)�

If ADB, remove brake pads per manufacturer’s

recommended procedures�

E� Remove hubcap and discard gasket�

8T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

IMPORTANT: End play can be checked with brake

drum installed or removed (preferred)�If

installed, ensure all brake drum wheel

fasteners are installed and tightened

to manufacturers specications before

checking end play�

2� Ensure hub hubcap mounting surface and end of

spindle are clean and totally free of any burrs or

debris�

3� Rotate hub at least 5 revolutions to ensure

bearings are fully seated�

NOTE: The hub MUST be rotated before performing

end play measurement� Rotation works the

rollers into their fully seated positions against

the bearing cone shoulder� Failure to rotate

hub could result in a false end play reading�

Figure 4: Checking end play

4� Attach dial indicator (Table 2) with magnetic base

to at surface at end of spindle (Figure 4)�

5� Adjust dial indicator so its pointer line of action is

parallel to spindle axis and touches hub’s hubcap

mounting surface� Ensure the plunger contacts

the hub on a surface that is smooth and fully

machined� Any regions with scratches, gouges or

non-cleanup should be avoided�

6� Check indicator for free movement in both

directions� Lightly push and pull on indicator arm

to verify plunger is free to move at least �005” in

each direction� If indicator bottoms out, readjust

until it is free to move �005” in both directions�

7� Zero indicator�

Rotate and

push hub

Figure 5: Checking inward end-play

8� Grasp hub ange,as shown in Figure5, and push

the hub inward while rotating hub slightly in both

directions (15 - 30° between two holes) until the

dial indicator reading remains constant�Record

reading�

Figure 6: Checking outward end-play

9� While still grasping hub (Figure6) pull hub outward

while rotating hub slightly in both directions (15 -

30° between two holes) until dial indicator reading

remains constant� Record reading�

10� End play is the total movement of the indicator�

Calculate difference between recorded values of

Step8 and Step9 to determine end play, record

value�

IMPORTANT: End play must be between 0�001”

(0�0254 mm) and 0�005” (0�0127 mm)�

If subsequent readings are necessary,

the hub must be rotated at least 5

revolutions to reseat the bearings (refer

to Step3)�

Rotate and

pull hub

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

A� If checking end play after installation, return to

INSPECTING HUB INSTALLATION on page13,

Step3�

B� If end play is more than 0.005” (0�127mm)�

Refer to CONTACTING HENDRICKSON Technical

Services for guidance on required next steps�

IMPORTANT: DO NOT place the suspension back into

service without correcting the problem�

C� If end play is within specication, no bearing

adjustment is necessary� Refer to Figure13 on

page12 and check to ensure:

i� Spindle nut is secure�

ii� Interlock and tang are properly seated�

iii� Retaining screws are securely in place�

11� If not already done so, perform CHECKING FOR SEAL

LEAKS on page7�

12� Go to INSTALL HUBCAP on page13�

13� Reassemble brake wheel-end components�

REMOVING AND INSTALLING HUB

IMPORTANT: To ensure continued warranty, DO

NOT perform the following procedures

without obtaining prior authorization

from Hendrickson Trailer Technical

Services� Refer to CONTACTING

HENDRICKSON for contact information�

NOTE: In order to maintain warranty status,

CONTACTING HENDRICKSON is recommended

before removing the hubcap and disturbing the

precision spindle nut�

WARNING: Prior to performing maintenance

procedures, help ensure conditions

are safe by following section

PREPARING TRAILER FOR SERVICE on

page5.

HUB REMOVAL

Only after receiving proper authorization from

Hendrickson Technical Services, use the following

procedure to remove the HXL5®hub assembly:

1� Remove tire / wheel assembly�

2� Disengage brakes and:

If drum brake, remove brake drum�

If ADB equipped, remove the caliper�

3� Remove hubcap screws and remove hubcap,

discard gasket�

4� Using a hex key (TOOLS REQUIRED on page6),

remove button-head cap screws from interlock

washer Figure7�

5� Remove interlock washer and spindle nut (Figure1

on page5)�

NOTE: Pushing on edge of interlock washer near one

of the screw holes will cause the opposite edge

to tip away from the nut, allowing easy removal

of interlock washer�

Figure 7: Button-head cap screw on PRECISION240®or

PRECISION320®nut system

6� Carefully pull HXL5®hub assembly slightly toward

spindle end�A short quick motion should allow

outer bearing to exit the hub� Be prepared to catch

outer bearing if it slides off the end of the spindle�

Otherwise, simply remove it�

7� Remove hub from spindle. The inner bearing is

held in the hub by the hub seal and should come

off with the hub�

8� Remove and DISCARD HUB SEAL:

A� If the seal is in the hub - a pry bar can be

used to carefully remove the seal from the hub

bore� Damage to hub and hub surfaces must

be avoided�

Button-head cap

screw

Interlock washer

PRECISION240®or

PRECISION320®

spindle nut

10 T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

B� If the seal is on the spindle - Using a brass,

leather or other soft-faced mallet,drive the seal

off the spindle by carefully striking the seal

from the back side�

NOTICE: Any damage to the spindle’s

machined surfaces can effect wheel

end performance.

9� Remove, clean and inspect inner bearing� Replace

if needed�

SPINDLE PREPARATION

Before installing or re-installing the hub, follow this

procedure to ensure hub and spindle machined

surfaces are clean and undamaged�

HN spindle HP spindle

Figure 8: Spindle seal & bearing journals

1� Remove old lubricant and thoroughly clean

spindle�

2� Inspect machined spindle journals (Figure 8) for

nicks,scratches, burrs or marks�If needed, use

crocus cloth or emery cloth to repair any damaged

areas�

3� Clean spindle threads and keyway thoroughly with

a wire brush to avoid false bearing adjustments

and to avoid introduction of contaminants into the

lubricant cavity�

4� Thoroughly clean spindle machined surfaces of

rust, dirt, grease or any other contaminants that

could damage the hub seal and cause it to leak�

5� Lubricate spindle bearing surfaces with clean

Chevron Delo®Synthetic Grease SF�

NOTICE: To minimize fretting and damage to

wheel-end, lubricate all components

and applicable surfaces using the

same lubricant.

PREPARING HUB FOR RE-INSTALLATION

The hub and bearings should be cleaned and inspected

prior to installation�

CAUTION: For safety reasons, to prevent injury

and damage to the hub and spindle,

lifting equipment may be required to

lift and support the hub as it is being

installed onto the spindle.

NOTE: If ADB,refer to Hendrickson literature number

T71004 Hub and Rotor Assembly and Caliper

Mounting for servicing the rotor�

If installing new hub, start with Step3�

1� Thoroughly clean the hub bore of any dirt, grease,

rust or any other substance that may be present�

2� Remove all sharp edges, nicks and burrs from seal

bore, hubcap bore and hubcap mounting surface of

the hub�

3� Inspect hub seal bore for roughness� If needed, use

emery cloth to remove any burrs or old bore sealant

and wipe hub clean�

4� Ensure hubcap mounting surface is smooth and

free of debris�

Figure 9: Hub-mounted seal installation

NOTE: HXL5®wheel-ends require Chevron Delo®

Synthetic Grease SF�

5� Apply lubricant to inner bearing�

Seal journal

Inner bearing

journal

Outer bearing

journal

Drive tool

Seal

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

6� Install inner bearing into hub (Figure 1 on

page5)�

NOTE: A hub seal driver (Figure 9) is recommended

and can be obtained from seal manufacturer�

7� Lubricate seal according to seal manufacturer’s

recommendations�

8� Place seal onto the drive tool (Figure9) for

installation into the hub according to seal

manufacturer’s instructions�

A� Align seal tool with hub seal bore�

B� Drive seal until it bottoms out in the hub seal

bore�

C� Rotate installation tool and apply several light

blows to ensure seal is properly seated�

D� Check inner bearing to ensure it rotates freely�

HUB AND OUTER BEARING ASSEMBLY

With seal and inner bearing in place; the hub, SF

(Semi-Fluid) grease and the outer bearing can now be

installed onto the spindle; in that order�

CAUTION: For safety reasons, to prevent injury

and damage to the hub and spindle,

lifting equipment may be required to

lift and support the hub as it is being

installed onto the spindle.

NOTE: Refer to MAKING A HUB SF GREASE DAM on

page14 for instructions on making the dam�

NOTICE: When completed, the hub should

be lled to 50% of hub cavity (to 3

& 9 o’clock position when viewing

from end of spindle).Any air bubbles

or aeration of grease may result in

insufcient grease quantity, bearing

spalling and wheel-end damage.

Hub

Pre-lubricated

outer bearing

SF grease dam

Figure 10: SF grease dam application

1� Taking care not to damage the seal, gently slide

the hub onto spindle until the seal is against the

spindle seal journal (Figure3 on page7)�

NOTICE: The HUB SEAL CAN BE DAMAGED if:

• Hub seal is improperly installed.

• Hub seal is rammed into the

spindle bearing shoulder.

• Hub is not kept supported and

aligned with spindle until the

outer bearing and axle nut are

installed.

• Lubricant types are mixed during

hub assembly.

2� Support and DO NOT allow hub to move off center

while completing the assembly�

3� With the hub supported in position as shown in

Figure10, place and hold the SF grease dam so it

covers the lower half the hub opening�

4� Fill hub cavity to the top of the dam (3 & 9 o’clock

position when viewing from end of spindle) with

Chevron Delo®Synthetic Grease SF�

5� Pre-lube outer bearing with a coating of SF grease�

6� Place grease coated outer bearing over the spindle

and against the SF Grease Dam�

7� Slide the dam out as the bearing is inserted into

the hub outer bearing cup�

8� Clean as needed to remove grease from unwanted

areas�

NOTE: While sliding hub onto spindle, grease is

collected at the spindle seal journal inboard of

the hub (Figure3 on page7)�This may be

later interpreted as a grease leak and should

be cleaned�

9� Continue with INSTALLING PRECISION SPINDLE NUT

SYSTEM�

12 T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

INSTALLING PRECISION SPINDLE NUT

SYSTEM

Available precision spindle nut systems for HXL5®

include:

SPINDLE NUT SYSTEM TOOLS

HN PRECISION240®313/16 inch socket

5/32 inch hex key

HP PRECISION320®47/8inch socket

3/16 inch hex key

Installation procedures are the same, but part and

tool sizes (Table 2 on page6 and above table)

are different due to the difference in spindle thread

diameters�

NOTICE: Failure to exactly follow the steps of

this procedure could cause improper

bearing seating, resulting in reduced

bearing life.

HP spindle shown

Cap

screw

(2)

Spindle

keyway

slot

Interlock

washer

PRECISION240®or

PRECISION320®

spindle nut Tang

Figure 11: Precision spindle nut system components

WARNING: FAILURE TO FOLLOW THESE

INSTRUCTIONS COULD CAUSE WHEEL

TO COME OFF AND CAUSE BODILY

INJURY.

OVER-TIGHTENING NUT COULD

CAUSE BEARINGS TO RUN HOT AND

BE DAMAGED.

1� Install precision spindle nut (Figure 11) onto the

spindle,toothed side out, and hand-tighten�

2� Simultaneously rotate hub clockwise at least three

revolutions, while using a torque wrench to tighten

precision spindle nut to 200ft�lbs�(271Nm) of

torque�

3� Back off precision spindle nut 1 revolution�

4� Rotate hub clockwise at least one full revolution�

5� Tighten precision spindle nut to 50ft�lbs� (68Nm)

of torque�

6� Rotate hub clockwise three full revolutions�

7� Repeat Step5 and Step6 three more times�

IMPORTANT: DO NOT rotate the hub at this point�

Rotating the hub before installing

the interlock washer can dislodge

the precision spindle nut and cause

improper bearing seating�

60°

Figure 12: Back off nut 1/6turn

8� Back-off nut 1/6turn (Figure 12, one hubcap screw

hole)�

Spindle keyway slot

Fully

engaged

teeth

Tang

Interlock

washer Cap

screw (2)

PRECISION240®or

PRECISION320®

spindle nut

Figure 13: Interlock washer and precision spindle nut fully engaged

9� Install interlock washer into the precision spindle

nut with the tang aligned and inserted in the

spindle keyway as shown in Figure13�

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

If washer and nut teeth DO NOT align, DO NOT

ROTATE NUT� Flip interlock washer over and

reinstall�

NOTE: The PRECISION240 and PRECISION320

interlock washer and nut are designed so that

one side of the washer will always engage the

spindle nut teeth without readjusting the nut�

IMPORTANT: Teeth between the interlock washer and

precision spindle nut must fully engaged

as shown in Figure13� DO NOT ADJUST

NUT TO ALIGN INTERLOCK WASHER�

10� Install two button-head cap screws (Figure11)

into the precision spindle nut until the heads of the

screws just contact the face of the nut�

11� Tighten cap screws to:

SPINDLE

TYPE

PRECISION

NUT SYSTEM

CAP SCREW TORQUE

ft. lbs. Nm

HN PRECISION240®10±2 13�5±2

HP PRECISION320®15±2 20±2

INSPECTING HUB INSTALLATION

To ensure correct installation,follow these procedures:

1� Ensure interlock washer is fully seated in

PRECISION240®or PRECISION320®spindle nut

(Figure13)�

2� Ensure heads of both cap screws contact nut face�

3� Check end play using CHECKING END PLAY on

page7 �

If end play is between 0.001 and 0.005 inch

(0�127 mm), continue with INSTALL HUBCAP�

If excessive end-play (nut too loose):

A� Remove two cap screws and pull interlock

washer away from nut, but not off spindle�

B� Tighten spindle nut until next washer tooth is

aligned�

C� Reassemble interlock washer and button-head

cap screws�

D� Return to CHECKING END PLAY on page7�

If insufcient end-play (over clamped):

A� Remove two cap screws and pull interlock

washer away from nut, but not off spindle�

B� Back-off spindle nut until next washer tooth is

aligned�

C� Reassemble interlock washer and button-head

cap screws�

D� Return to CHECKING END PLAY on page7�

NOTE: If the above steps have already been

performed and end play is still out of tolerance,

return to HUB REMOVAL on page9 to

remove and reinstall hub� If difculty continues,

refer to CONTACTING HENDRICKSON on

page4�

4� Perform the CHECKING FOR SMOOTH ROTATION on

page7�

INSTALL HUBCAP

After the hub installation and inspection is complete,

the hubcap can be installed�

IMPORTANT: Always install a new gasket when

reinstalling hubcap�

NOTICE: Interference between nut system

and hubcap could occur if improper

components are used. Use only

genuine Hendrickson or Hendrickson

approved replacement components.

Refer to RELATIVE LITERATURE

on page4 or CONTACTING

HENDRICKSON on page4 as

needed.

1� Visually inspect hubcap, hub mating surface, bolt

holes and new gasket for:

• Signs of damage

• Debris,such as silicon gasket sealer

• Burrs or sharp edges

• Cracks

2� Clean, repair or replace as needed�

3� Align hubcap and new gasket onto hub and insert

bolts�

4� Hand-tighten bolts�

5� Using a star pattern, tighten hubcap screws to

15±3 ft� lbs� (20±4 Nm) torque�

NOTICE: DO NOT overtighten hubcap screws.

Overtightening will distort metal

hubcap mounting ange, which will

prevent hubcap from achieving a

leak-free seal.

14 T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

COMPLETING INSTALLATION

1� Spin hub more than three revolutions to distribute

lubricant equally in hub bore�

2� If drum brake, Install brake drum

3� If ADB, install brake caliper according to

manufacturer’s procedures� Refer to Hendrickson

literature number T71004 Hub and Rotor Assembly

and Caliper Mounting for information to reassemble

ADB rotor and brake components� New caliper

mounting hardware must be used�

4� Install wheel (tire and rim assembly) Refer to

Brake DRUM AND WHEEL ASSEMBLY in Hendrickson

literature number T82006 Stud Replacement

Procedures�

ADDITIONAL INFORMATION

HUB SF GREASE DAM

Use of the hub SF grease dam,during assembly, is the

recommended method of lubricating the hub with SF

grease� Refer to HUB AND OUTER BEARING ASSEMBLY on

page11 for instructions on how to use the Hub SF

Grease Dam�

MAKING A HUB SF GREASE DAM

To make a grease dam,follow the instructions on the

face of the template (Figure14 on page15)� Use

cardboard, plastic or other at stiff material�

TORQUE VALUES

Table 3 lists torque values for HXL5®wheel-end

fasteners�

FASTENER TORQUE

ft. lbs. Nm

Hubcap Screws 15±3 20±4

Hub ll port plug 22±2 30±3

PRECISION240®cap screws 10±2 13�5±2

PRECISION320®cap screws 15±2 20±2

Wheel Nuts1, 2475±25 644±25

1 These fasteners are incrementally tightened according to procedures

dened in this manual and superseded by OE documentation,where

applicable�Refer to decal T70013 Wheel Assembly Procedure�

2 Re-torque all wheel nuts after 50 to 100 miles of service�

Table 3: HXL5®Wheel-end fastener torque values

WHEEL STUD REMOVAL AND INSTALLATION

PROCEDURE

Refer to Hendrickson literature number T82006 Stud

Replacement Procedures for detailed instructions on

wheel stud removal for both drum and disc applications�

T72007 A

HXL5®HUB MAINTENANCE PROCEDURES

HN Spindle

radius

Hub SF Grease Dam

HP Spindle

radius

Cut out

and

discard

1. Print one template for each spindle type (HN & HP).

2. Make a HN or HP grease dam from cardboard, plastic or other at sti material.

3. Use this grease dam when lling hub with semi-uid grease to 50% full level.

4. Slide outer bearing over spindle and slide grease dam out while inseting bearing into hub.

For more details, refer to TMC RP 631.

For assistance contact Hendrickson Technical Services

866-RIDEAIR (743-3247) or in Canada at 800-668-5360

Figure 14: Hub SF Grease Dam template

Printed in United States of AmericaInformation contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reected. © 2018 Hendrickson USA, L.L.C.All Rights Reserved

T72007 Rev A 03-18 ECN 30197

www.hendrickson-intl.com

TRAILER COMMERCIAL VEHICLE SYSTEMS

2070 Industrial Place SE

Canton, OH 44707-2641 USA

866.RIDEAIR (743.3247)

330.489.0045 • Fax 800.696.4416

Hendrickson Canada

250 Chrysler Drive, Unit #3

Brampton, ON Canada L6S 6B6

800.668.5360

905.789.1030 • Fax 905.789.1033