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System: Axles, Driven Bulletin #: 22-4 Date: March 9, 2005

Meritor Rear Axle Seals

Accompanying this bulletin is information on the new Multiple Lip Seals used in the Meritor rear drive axles. Please utilize this information when replacing seals in the Meritor rear ends. The required tools for this procedure will be shipped as received. Keep in mind that the warranty coverage on these seals is 3 years or 350,000 miles, whichever occurs first. If you have any questions, feel free to contact me at Location # 24. Thank you, Walter Kirkland Jr. Tallahassee Maintenance Department Attachments: Attachment 1: Meritor Technical Bulletin # TP-0446 Attachment 2: Meritor Product Information Letter # 430 Attachment 3: Meritor General Parts Bulletin # GP-999

TP-0446Issued 02-05

Technical Bulletin

Installing a Multiple-Lip Seal (MLS) onto Meritor 14X/16X/18X Single and 14X/16X/18X/38X Tandem Drive Axles

Does Not Apply to Meritor Front Drive Steer Axles, Transfer Cases or Other Drive Axles

Not Listed in This Publication.TP-0446Issued XX-051 Technical Bulletin

Table A: Driver and Sleeve Part Numbers

Forward input and output seals must be serviced with the seal and sleeve. The service part number provides both when required.

Check your application carefully before installing the multiple-lip seal.

How to Obtain Additional Maintenance and Service InformationRefer to technical bulletin TP-0531, Multiple-Lip Seal Installation, for instructions on CD. Also, refer to technical bulletin TP-0534; Maintenance Manual 5A, Single-Reduction Differential Carriers; Maintenance Manual 5E, Tandem Axle Forward Carriers and Single Axle Carriers, Including Double-Reduction Carriers; or Maintenance Manual 5L, Single-Reduction Forward Differential Carriers on Tandem and Tridem Axles. To obtain these publications, call ArvinMeritor’s Customer Service Center at 800-535-5560, or visit the Tech Library on our website at arvinmeritor.com.

Important InformationThis technical bulletin provides the recommended procedure for installing Meritor multiple-lip seals (MLS) on Meritor 14X/16X/18X single and 14X/16X/18X/38X tandem drive axles. These instructions do not apply to front drive steer axles, transfer cases or other drive axles not listed in this publication.

The new Meritor multiple-lip seals feature a separable sleeve installed onto the yokes at the tandem forward-rear input and forward-rear output positions. No sleeve is used on the rear-rear input.

Installation of the new seals requires a set of four seal drivers and two sleeve drivers. Refer to Table A for part numbers.

Special ToolsThere are six new installation drivers required for replacement of the multiple-lip axle yoke seals. Figure 1.

� A sleeve driver and seal driver for the forward-rear input

� A sleeve driver and seal driver for the forward-rear output

� Two model specific seal drivers for the rear-rear input

To obtain these sleeves, seals and drivers, call ArvinMeritor’s Commercial Vehicle Aftermarket at 888-725-9355.

Figure 1

Axle Model and PositionSeal Service Part Number

Previous Seal Part Number Seal Drivers Sleeve Drivers

14X/16X/18X/38X Forward-Rear Unit Input (FUI) A1-1205X2728 A-1205R2592 2728T1 2728T2

14X/16X Forward-Rear Unit Output (FUO) A1-1205Y2729 A-1205P2590 2729T1 2729T2

14X Rear-Rear Unit Input (RUI) A1-1205Z2730 A-1205N2588 2730T Not Required — Sleeve is unitized

16X/18X Rear-Rear Unit Input (RUI) A1-1205A2731 A-1205Q2591 2731T Not Required — Sleeve is unitized

Figure 1

4005371a

2729T1 2730T

2731T2729T2

2728T1

2728T2

TP-0446Issued 02-05 (16579/24240)Page 2 Copyright ArvinMeritor, Inc., 2005 Printed in the USA

Removal

WARNINGTo prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service.

Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip and fall over. Serious personal injury and damage to components can result.

CAUTIONOn a rear-rear input, if you partially or fully install a yoke and then remove it for any reason, remove, discard and replace the seal with a new seal. If a seal or sleeve is removed after partial or full installation, discard the seal or sleeve and replace it with a new seal or sleeve. Damage to components can result.

1. Wear safe eye protection.

2. Park the vehicle on a level surface. Set the parking brake. Block the wheels to prevent the vehicle from moving.

3. Use a jack to raise the vehicle so that the wheels to be serviced are off the ground. Support the vehicle with safety stands.

4. Disconnect the drive shafts.

5. Attach a flange bar or place a yoke bar over the input or output yoke to hold the yoke or flange while you remove the nut. Always use a flange or yoke bar during removal and installation of the flange yoke nut to prevent damage to the gearing. Figure 2.

Figure 2

WARNINGUse a puller tool to remove the yoke or flange from the shaft. Do not use a hammer or mallet, which can damage components and cause vibration in the driveline. If this occurs, the driveline can separate from the vehicle during operation. Serious personal injury and damage to components can result.

6. Remove the yoke nut and washer. Use a puller tool to remove the yoke or flange from the shaft. Do not use a hammer or mallet, which can damage components. Figure 3.

Figure 3

CAUTIONOn axles that have the bolt-on deflector on the forward-rear output shaft bearing cage, the deflector must be removed and discarded. The new forward output sleeve will not assemble correctly to the new output seal with the bolt-on deflector in place. Remove the deflector from the output shaft bearing cage and reassemble the output cage hex-head capscrews and washers according to the appropriate maintenance manual instructions. Damage to components can result.

7. Carefully remove the pinion seal from the yoke or carrier. Do not damage the seal bore when you remove the seal. Do not allow dirt or grease to contaminate the seal bore or adjacent bearings.

8. If a seal sleeve is installed onto a yoke, remove the sleeve using a bearing puller. Do not reuse the seal sleeves.

9. Inspect the yoke seal area for damage that could cause lubricant leaks after you install the seal. Use emery paper or an equivalent product to remove scratches, nicks or burrs only.

Figure 2

YOKE BAR 1003451b

Figure 3

1002733a

YOKEPULLER

TP-0446(16579/24240) Issued 02-05Printed in the USA Copyright ArvinMeritor, Inc., 2005 Page 3

Installation

WARNINGSolvent cleaners can be flammable, poisonous and cause burns. Examples of solvent cleaners are carbon tetrachloride, and emulsion-type and petroleum-base cleaners. Read the manufacturer’s instructions before using a solvent cleaner, then carefully follow the instructions. Also follow the procedures below.

� Wear safe eye protection.

� Wear clothing that protects your skin.

� Work in a well-ventilated area.

� Do not use gasoline, or solvents that contain gasoline. Gasoline can explode.

� You must use hot solution tanks or alkaline solutions correctly. Read the manufacturer’s instructions before using hot solution tanks and alkaline solutions. Then carefully follow the instructions.

1. Clean the ground and polished surface of the yoke journal using a clean shop towel and a safe cleaning solvent. Do not use abrasive cleaners, towels or scrubbers to clean the yoke or flange surface. Do not use gasoline.

2. Inspect the yoke seal area for damage that could cause lubricant leaks after you install the seal. Use emery paper or an equivalent product to remove scratches, nicks or burrs only.

3. Install the deflector, if equipped, onto the yoke. You must install the deflector before you install the sleeve into the yoke. Figure 4.

Figure 4

WARNINGObserve all warnings and cautions provided by the press manufacturer to avoid damage to components and serious personal injury.

Do not hit steel parts with a steel hammer. Pieces of a part can break off. Serious personal injury and damage to components can result.

4. Apply a light coat of axle oil to the yoke seal journal. Position the sleeve into the forward-rear axle output yoke sleeve driver. Do not touch the greased areas of the sleeve. The sleeve must be kept clean prior to assembly into the seal. Use an arbor press and the appropriate driver to install the sleeve into the yoke. Verify that the sleeve is fully-seated in the yoke to prevent damage to components. Figure 5.

The yoke must be fully pressed into the sleeve driver until the end of the yoke bottoms out in the sleeve driver. This will correctly position the sleeve on the yoke. When correctly seated, the forward-rear output sleeve is positioned 0.200-inch ± 0.030-inch (5 mm ± 0.75 mm) from the end of the yoke. Figure 6.

� If you do not have a press: Position the yoke on a five-inch (127 mm) spacer on a workbench. Use a dead-blow hammer and the appropriate driver to install the sleeve into the yoke. Figure 7.

5. Apply a light coat of axle oil to the yoke seal journal. Position the sleeve into the forward-rear axle input yoke sleeve driver. Do not touch the greased areas of the sleeve. The sleeve must be kept clean prior to assembly into the seal. Use an arbor press and the appropriate driver to install the sleeve into the yoke. Verify that the sleeve is fully-seated in the yoke. Figure 8.

The yoke must be fully pressed into the sleeve driver until the end of the yoke bottoms out in the sleeve driver. This will correctly position the sleeve on the yoke. When correctly seated, the forward-rear input sleeve is positioned 0.030-inch ± 0.030-inch (0.75 mm ± 0.75 mm) from the end of the yoke. Figure 6.

� If you do not have a press: Position the yoke on a five-inch (127 mm) spacer on a workbench. Use a dead-blow hammer and the appropriate driver to install the sleeve into the yoke. Figure 7.

Figure 4

4004889a

YOKE

DEFLECTOR,IF EQUIPPED

SLEEVE

DRIVER

TP-0446Issued 02-05 (16579/24240)Page 4 Copyright ArvinMeritor, Inc., 2005 Printed in the USA

Figure 5

Figure 6

Figure 7

Figure 8

CAUTIONHold the sleeve and seal only on the outer diameter. Do not touch the greased inner diameter of the seal and the greased area of the sleeve. This can contaminate the seal and cause a leak between the shaft and the seal. Damage to components can result.

6. Install the forward-rear axle input seal. Hold the sleeve and seal only on the outer diameter. Position the seal into the seal driver and align it with the forward-rear axle input bearing cage. Do not touch the lips in the inner diameter of the seal. Use a dead-blow hammer and the appropriate driver to install the seal into the bearing cage. Figure 9.

Figure 9

Figure 5

Figure 6

Figure 7

SLEEVE

FORWARD-REAR OUTPUTWITHOUT DEFLECTOR

4004874a

4004990a

YOKE

SLEEVE

DRIVER

FORWARD-REAR OUTPUT: 0.200" ± 0.030"

(5 MM ± 0.75 MM)

FORWARD-REAR INPUT: 0.030" ± 0.030"

(0.75 MM ± 0.75 MM)

End of the yokemust bottom out

in the sleeve driver.

4004991a

5" (127 MM)SPACER

Figure 8

Figure 9

SLEEVE

FORWARD-REAR INPUTWITH DEFLECTOR

4004875a

4004876a

FORWARD-REAR INPUT

TP-0446(16579/24240) Issued 02-05Printed in the USA Copyright ArvinMeritor, Inc., 2005 Page 5

CAUTIONOn axles that have the bolt-on deflector on the forward-rear output shaft bearing cage, the deflector must be removed and discarded. The new forward output sleeve will not assemble correctly to the new output seal with the bolt-on deflector in place. Remove the deflector from the output shaft bearing cage and reassemble the output cage hex-head capscrews and washers according to the appropriate maintenance manual instructions. Damage to components can result.

7. Install the forward-rear axle output seal. Hold the sleeve and seal only on the outer diameter. Position the seal onto the seal driver and align it with the forward-rear axle output shaft.Do not touch the lips in the inner diameter of the seal. Use a dead-blow hammer and the appropriate driver to install the seal onto the output shaft. Figure 10.

Figure 10

8. Install the rear-rear axle input seal. Hold the seal only on the outer diameter. Position the seal into the seal driver and align it with the rear-rear axle input bearing cage. Use a dead-blow hammer and the appropriate driver to install the seal into the bearing cage. Figure 11.

Figure 11

9. Use a feeler gauge to check the seal gap at all three axle positions. The seal is correctly installed if the gap is less than 0.005-inch (0.127 mm) around the circumference of the seal flange. Figure 12.

� If the gap is more than 0.005-inch (0.127 mm): Use a dead-blow hammer and the appropriate driver to completely install the seal.

Figure 12

10. Apply a light coat of axle oil to the yoke seal journal. Install the yokes and connect the drive shafts. Refer to the manuals specified in this bulletin for the correct procedures.

Figure 10

4004878a

FORWARD-REAR OUTPUT

Figure 11

Figure 12

4004879a

REAR-REAR INPUT

4004877a

Information contained in this publication was in effect at the time the publication was approved for printing and is subject to change without notice or liability. Meritor Heavy Vehicle Systems, LLC, reserves the right to revise the information presented or discontinue the production of parts described at any time.

Copyright TP-0446ArvinMeritor, Inc. Issued 02-05All Rights Reserved Printed in the USA

Meritor Heavy Vehicle Systems, LLC2135 West Maple RoadTroy, MI 48084 USA800-535-5560arvinmeritor.com 2005

(16579/24240)

PRODUCT INFORMATION LETTER

PRODUCT INFORMATION LETTER

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ArvinMeritor, Inc.2135 West Maple RoadTroy, MI 48084-7186

PRODUCT INFORMATION LETTER #430

DATE: FEBRUARY 2005

SUBJECT: MULTIPLE LIP SEAL (MLS)

MODELS: 14X/16X/18X SINGLE AND 14X/16X/18X/38X TANDEM DRIVE AXLES.

Dear Customer,

In the interest of continuous product improvement ArvinMeritor is pleased to announce theimplementation of a newly designed multiple lip seal for our highest volume axle products. Thenew seal assembly, which is made using premium materials, improves oil containment, contam-inant exclusion, while generally increasing seal effectiveness.

The axle models affected include the RT-xx-14X, RT-xx-16X, RT-xx-18X and RT-xx-38X forwardunit input (FUI) and the RT-xx-14X and RT-xx-16X forward unit output (FUO) seal positions.Also affected are the RT/RS-xx-14X, RT/RS-xx-16X and RT/RS-xx-18X rear unit input (RUI)seal positions.

The FUI and FUO positions are “soft unitized’ designs with two piece construction. These sealsincorporate a seal sleeve, which is pre-installed on the yokes before yoke installation to the axle.

The RUI seals are “fully unitized” with seal sleeves integral to the seal assembly.

These new seals are an exclusive ArvinMeritor design to be used only with Meritor branded axles.

The seals will be introduced into production as a running change beginning on March 7, 2005.

Axle Modeland

PositionSeal Service

Part No.Previous

Seal Part No.Seal Drivers Sleeve Drivers

14X/16X/18X/38XForward-Rear Input (FUI)

A1-1205X2728 A-1205R2592 2728T1 2728T2

14X/16XForward-Rear Output

(FUO)A1-1205Y2729 A-1205P2590 2729T1 2729T2

14XRear-Rear Input

(RUI)A1-1205Z2730 A-1205N2588 2730T1 Not Required

Seal is unitized

16X/18XRear-Rear Input (RUI)

A1-1205A2731 A-1205Q2591 2731T1 Not RequiredSeal is unitized

MLS Part Number and Driver Information:

The new seals will require new seal and sleeve installation tools. For recommended installation instructions, please see Technical Bulletin TP-0446.ArvinMeritor recommends the use of specific seal and sleeve drivers to ensure proper positioning. A CD (TP-0531) has been developed which shows the correct methods used for seal installation and replacement. Replacement seals as well as seal and sleeve driver kits are available through ArvinMeritor Commercial Vehicle Aftermarket at 888-725-9355.

The current bolt-on deflector (3264-J-1466) that is used on the RT-xx-14X and the RT-xx-16X forward unit output position is incompatible with the new seal design and will be discontinued with the implementation of the new seal. The seal sleeve that is assembled to the yoke also acts as a deflector with the new seal.

If you have any questions, please contact your ArvinMeritor account representative.

J. L. Malkowski Director - Product Management CVS Axles

J. L. Malkowski

Fully Unitized one piece design: Seal with seal sleeve design

“soft unitized”:

Installation tools:

Forward Unit Input Seal Position: Forward Unit Output Seal Position:

Rear Unit Input Seal Position:

Output Shaft Seal Deflector:

February 21, 2005 GP 999

GENERAL PARTS BULLETIN Subject: Meritor® Multiple Lip Oil Seals (MLS) ArvinMeritor Commercial Vehicle Systems has issued Product Information Letter # 430 (see attached) announcing the release of a new pinion seal design for specific Meritor axles. This new seal is called the Meritor Multiple Lip Seal (MLS). The carriers affected include RT-xx-14X, RT-xx-16X, RT-xx-18X and RT-xx-38X forward unit input (FUI) and the RT-xx-14X and RT-xx-16X forward unit output (FUO) seal positions. Also affected are the RT/RS-xx-14X, RT/RS-xx16X and RT/RS-xx-18X rear unit input (RUI) seal positions. Certain applications (non-MLS), such as transfer cases, front drive steer axles, cranes, lift truck and all AxleTech (off-highway) applications will continue to utilize the current seal design. Be sure to check your application before installing the new Meritor Multiple Lip Seal. Reference Technical Bulletin TP-0446 for installation instructions (see attached). ArvinMeritor Commercial Vehicle Aftermarket (CVA) has released four new service part numbers for the MLS seals, six new part numbers for the required installation tools, and a new KIT part number containing all six tools. Two of the new seals are a unitized one piece design and two are a two piece seal and sleeve design. DO NOT ATTEMPT TO INSTALL THE NEW SEALS OR SLEEVES WITHOUT THE NEW SEAL AND SLEEVE DRIVER TOOLS. CVA has also released four new part numbers to service non-MLS applications. The vast majority of demand will be for the new MLS seals. Demand for non-MLS applications should be less than 1% of that for MLS applications. Current seal driver tools will continue to be offered for non-MLS applications.

Table 1: Multiple Lip Seal (MSL) part numbers – ALL applications but those listed in table 2 below.

Axle Model and Position

Current Seal Design Part

Number

New Seal / Sleeve Service Part Number

Seal Driver Tool Part Number

Sleeve Driver Tool Part Number

RT14X/16X/18X/38X Forward-Rear Input (FUI) A 1205R2592 A1 1205X2728

2728T1 Included in KIT4463

2728T2 Included in KIT4463

RT14X/16X Forward-Rear Output (FUO) A 1205P2590 A1 1205Y2729

2729T1 Included in KIT4463

2729T2 Included in KIT4463

RT/RS14X Rear-Rear Input (RUI) A 1205N2588 A1 1205Z2730

2730T1 Included in KIT4463

Not required – One Piece

Design

RT/RS16X/18X Rear-Rear Input (RUI)

A 1205Q2591 A1 1205A2731 2731T1

Included in KIT4463

Not required – One Piece

Design

New and Remanufactured Carriers: All new and remanufactured carriers for the affected models will be shipped with the new MLS seal installed and the yoke sleeve attached loose. For non-MLS applications, the seal must be replaced with the appropriate current design seal. Availability: As CVA inventory is depleted on the current seal part numbers, these will be superceded to the new MLS seal part numbers (Table 1). At that time, orders on hand will be switched to the new MLS part numbers.