meritor wheel bearing adjustment system for the …

MERITOR® WHEEL BEARING ADJUSTMENT SYSTEM FOR THE AFTERMARKET

OPTIMAL WHEEL BEARING ADJUSTMENT. LONGER TIRE LIFE AND MORE TIME ON THE ROAD.

MERITOR AND TEMpER.

Together to Provide a Superior Bearing Adjustment Solution.

With more than 100 years of axle-manufacturing experience, Meritor has consistently brought advanced axle technologies to the marketplace. Whether designing and manufacturing from the ground up or partnering with another industry leader, our goal is to provide fleets and end users with products that deliver maximum operating efficiency and premium performance. And now, Meritor Aftermarket is teaming up with Temper® to offer Doctor Preload® and Temper-Loc® spindle nuts – a superior bearing adjustment system for wheel-end management, longer tire life and less downtime. That’s an idea that really does drive results.

Founded in 1969, Temper is a leading engineering and manufacturing company in precision assemblies and equipment for industrial products. The company introduced its first product – Temper Load Rings – in 1970 to offer better bearing adjustment for a wide variety of industrial applications. Today, Temper continues to pioneer technologies that provide complete solutions for heavy vehicle applications, including the Doctor Preload and Temper-Loc bearing adjustment system.

Doctor Preload and Temper-Loc bearing adjustment system is designed and manufactured in the U.S.A.

“I use the system on roughly 100 trailers and it’s keeping preload on the wheel bearings. It has been a good addition to my fleet.”

John Herbst, Owner, J&R TransportDickeyville, WI

“We believe in the product and it’s doing exactly what it promised to do – keeping a consistent preload on the wheel bearings and contributing to good-to-better tire wear. The system has been a valuable addition to our maintenance operation. On our two most recent orders of new trailers, we insisted that the OEMs install Temper-Loc nuts, which puts us on the right track with properly managed bearing settings.”

Roy Hegland, Fleet Maintenance Supervisor, Midwest Motor ExpressBismarck, ND

“I’m a firm believer in the Doctor Preload and Temper-Loc nut system. It’s helped us cut recap use by one-third over two years and reduce inside tire edge wear-out by 90%. Our wheel ends run truer and run longer.”

Russ Van Beek, Heyl Truck LinesAkron, Iowa

“Setting the proper pre-load can’t be anything but good. That’s why we’ve invested in Doctor Preload and Temper-Loc spindle nuts. I’m glad I spent the money on this system and it’s working well on all my trailers.”

Brock Ackerman, K & B TransportationSouth Sioux City, Nebraska

IMPORTANT WHEEL-END PERFORMANCE GAINS

INC

RE

AS

ING

Whe

el-E

nd P

erfo

rman

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PRELOADPounds

END PLAYInches

Doctor Preload setting range(SAE J2535)

0 .004 .008 .012 .016

Conventional practice end play(degraded performance)

Better Bearing Management Through Preload.

Optimum wheel-end management begins with optimal wheel bearing adjustment. According to the Society of Automotive Engineers (SAE), the optimal setting for wheel bearings is a light preload.

What is preload? Preload is simply defined as a measured “tight” bearing setting in which all of the rollers in the tapered roller bearings are kept under a slight force, or load. This preload condition keeps vibration and angular movement in the wheel end to a minimum during operation, reducing potential bearing wear and other wheel-end problems.

Load on bearings, including preload, is measured in “pounds-force” or lbf. SAE recommended practice J2535 stipulates the optimal settings for drive and trailer axle wheel bearings to be between 500 and 1,000 lbf, and between 250 and 500 lbf for steer axle wheel bearings. With these settings, bearings, seals and other wheel-end components provide maximum performance.

Without preload, there is space or “clearance” between the bearing components and the bearings are said to have end play (also referred to as a “loose” bearing setting). Excessive end play can result in extreme wear on bearings, spindles, tires, and wheel seals. It can also cause anti-lock braking system (ABS) faults.

Optimal Preload with the Doctor Preload Tool.

Doctor Preload, when used in conjunction with Temper-Loc spindle nuts, is the ideal wheel-end bearing adjustment solution. The system sets the bearings to precise preload settings with a quick, simple, reliable and repeatable process.

Features and Benefits:

n Measured, precise, repeatable settings to optimal preload for more time on the road

•Improvedtirelife

•Optimalbearing,spindleandwheelseallife

•DecreasedABSfaults

n Adjusts wheel-end bearings to meet SAE J2535 recommended preload settings

SpecificationsDoctor Preload Tool

Part NumberUse with Temper-Loc Nut

Axle Spindle Application

Axle Applications

MER415005 MER614723 TP Trailer Meritor (TP), Dana, Eaton (P22), Fruehauf, Propar

MER415003* MER614743 TN Trailer

Meritor (F, H, RL, RQ, TK, TKL, TKLD, TL, TLD, TN, TND, TO, TQC, TQD) Dana Spicer (D20, D21, D22, DD22, K21, K25,K30) Eaton (C, C2, CD, CD2, CE, ESA225J, EST, EST225J, EST230J, ETA230C, ETA225D, ETA225J, H23L, H25R, HCE, HJ, HJE, LA15, T18C, 20L-77, 22L, 22R, J, JE, JH, 23L, 23R, 25R) Hendrickson (HN) Ingersoll (A22T) Standard Forge (A25, A26, 17,000 lbs, 18,000 lbs trade)

MER415084 MER614743TN Trailer with

Aluminum Hubs

Meritor (F, H, RL, RQ, TK, TKL, TKLD, TL, TLD, TN, TND, TO, TQC, TQD) Dana Spicer (D20, D21, D22, DD22, K21, K25, K30) Eaton (C, C2, CD, CD2, CE, ESA225J, EST, EST225J, EST230J, ETA230C, ETA225D, ETA225J, H23L, H25R, HCE, HJ, HJE, LA15, T18C, 20L-77,22L, 22R, J, JE, JH, 23L, 23R, 25R) Hendrickson (HN) Ingersoll (A22T) Standard Forge (A25, A26, 17,000 lbs, 18,000 lbs trade)

MER415002 MER614836 FF SteerMeritor (FD900, FD901, FD961, FE900, FE903, FF900, FF901, FF921, FF931, FF932, FF933, FF941, FF942, FF943, FF944, FF952, FF961, FG941) Spicer (1100S)

MER415347 MER614837 FE Steer

Meritor (FE931) Eaton (EFA12FA, EFA12FA, EFA13FS, E12001, FE931, 12K, 13.2K) Ford Sifco 12K Ford 6K

MER415004 MER614973 R Drive Meritor (TR), Eaton (P22), Ford, Rainstar

* Note: Not compatible with Conmet aluminum hubs for TN trailer axles. Contact our Customer Care team for more information.

Precise Positioning With Temper-Loc Spindle Nuts.

Temper-Loc precision single-locking nut system provides bearing adjustment with pinpoint accuracy; each Temper-Loc nut is manufactured to ultra-tight machining tolerances. The nut system sets optimal wheel-end preload maximizing tire life and vehicle uptime. With its unique chamfered mounting face, Temper-Loc is the exclusive spindle nut used in conjunction with the Doctor Preload bearing adjustment tool.

Features and Benefits:

n Heat-treated nut face for superior strength

n Fingertip control retainer ring for ease of placement and positioning

n EasyView™ verification of positive locking

SpecificationsTemper-Loc

Nut Assembly Number

Replaces Stemco Number

Replacement Retainer Ring Number

Axle Spindle Application

Thread Diameter

Threads Per Inch

Tool Socket Size Outer Bearing

MER614723 447-4723 MER644723 TP Trailer 3.480” 12 4-13/16” - 8 point HM518445 / HM518410

MER614743 447-4743 MER644743 TN Trailer 2.625” 16 3-3/4” - 8 point HM212049 / HM212011

MER614836 448-4836 MER644836 FF Steer 1.500” 12 2-1/2” - 6 point 3782 / 3720

MER614837 448-4837 MER644837 FE Steer 1.500” 18 2-1/2” - 6 point 3782 / 3720

MER614973 449-4973 MER644973 R Drive 3.250” 12 4-3/8” - 8 point 580 / 572

Register your Doctor Preload

tool today. Simply complete

the registration details and

send this form with a copy

of your original invoice to:

Meritor, Inc.

7975 Dixie Highway

Florence, KY 41042

Attn: Peter Freeman

Doctor PreloaD® tool registration

Company Name:

Date:

Contact Name:

Street Address:

City:

State:

Zip Code:

Daytime Phone:

E-Mail Address:

Note: E-mail address will be used to confirm receipt of registration for warranty purposes.

Doctor Preload Tool Part Number:

Doctor Preload Tool Serial Number:

Purchased From:

Purchase Date:

(Please attach copy of invoice)

SIx SIMpLE STEpS. COUNTLESS BENEFITS.

4. Finger-tighten the Temper-Loc nut against the bearing; align the closest dot on the nut to the key locator indicator mark.

6. Install the Temper-Loc nut retaining ring and check for correct retainer installation.

1. Attach Doctor Preload tool to end threads of the axle. Use a sweeping motion to guide the load arms around the locknut while engaging the key locator in the keyway. Engage the thread with two turns of thread with the end of the axle.

2. Seat the bearing rollers. Tighten T-handle to load the bearings until the gauge pointer is in green “Roll In Zone.” Roll the wheel three revolutions.

3. To set the bearings, loosen T-handle slowly until gauge pointer points to “Set Drive/Trailer Axle” or “Set Front Axle” accordingly.

5. Remove the Doctor Preload tool.

Register your Doctor Preload

tool today. Simply complete

the registration details and

send this form with a copy

of your original invoice to:

Meritor, Inc.

7975 Dixie Highway

Florence, KY 41042

Attn: Peter Freeman

Doctor PreloaD® tool registration

Company Name:

Date:

Contact Name:

Street Address:

City:

State:

Zip Code:

Daytime Phone:

E-Mail Address:

Note: E-mail address will be used to confirm receipt of registration for warranty purposes.

Doctor Preload Tool Part Number:

Doctor Preload Tool Serial Number:

Purchased From:

Purchase Date:

(Please attach copy of invoice)

Product Protection You Expect. Customer Support You Deserve.

Doctor Preload tools are covered by a 1-year warranty from the sale date to the end user. Temper-Loc nuts are covered by a 3-year warranty from the date of installation. Documentation of tool sale date and nut installation details (including date of installation) must accompany warranty claim submission. The Doctor Preload tool and Temper-Loc nut system must be registered for warranty eligibility.

Our highly trained Customer Care team is your source for complete support. Call them at 888-725-9355 (in Canada, call 800-387-3889). Or visit MeritorPartsOnline.com – our industry-leading online catalog, ordering and tracking system – with real-time access to complete parts information resources.

Each tool is shipped with a registration card. Registration must be completed for warranty eligibility of Doctor Preload tool and Temper-Loc nut system.

888-725-9355 U.S.800-387-3889 CanadaMeritorPartsOnline.commeritor.com

©2015 Meritor, Inc.Litho in USA, SP-1520 Issued 01-15 (47865/11900)

Meritor Heavy Vehicle Systems, LLC7975 Dixie HighwayFlorence, Kentucky 41042 USA

As a world leader in providing aftermarket solutions for the global commercial vehicle and industrial markets, Meritor is committed to pro-viding our customers with innovative aftermarket ideas that deliver the results you need to get the job done faster, better and more efficiently.

Temper, Doctor Preload, Temper-Loc, and EasyView are registered trademarks of Temper Corporation. Product models, brands and names depicted herein are the property of their respective owners and are not in any way associated with Meritor, Inc., or its affiliates.

PART NO. DESCRIPTIONENTRY LEVEL MEDIUM LARGE

MER415002 FF Steer Tool 0 0 1MER415003 TN Trailer Tool - Cast Hub 0 1 1MER415004 R Drive Tool 0 1 1MER415005 TP Trailer Tool 0 1 1MER415084 TN Trailer Tool - Aluminum Hub 0 1 1MER415347 FE Steer Tool 0 0 0MER614723 TP Trailer Nut 10 20 54MER614723B12 TP Trailer Nut 24 48 132MER614743 TN Trailer Nut 10 20 44MER614743B12 TN Trailer Nut 24 48 108MER614836 FF Steer Nut 4 8 18MER614836B12 FF Steer Nut 0 12 48MER614837 FE Steer Nut 0 0 0MER614837B12 FE Steer Nut 0 0 0MER614973 R Drive Nut 8 16 36MER614973B12 R Drive Nut 12 36 84

MERITORDOCTOR PRELOAD® TOOLS and TEMPER-LOC® NUTS

STORE SUGGESTED STOCK LEVELSJanuary 2015

PART NO. DESCRIPTION LIST PRICEMER415002 FF Steer Tool 1,561.89$ MER415003 TN Trailer Tool - Cast Hub 1,561.89$ MER415004 R Drive Tool 1,700.67$ MER415005 TP Trailer Tool 1,642.06$ MER415084 TN Trailer Tool - Aluminum Hub 1,757.36$ MER415347 FE Steer Tool 1,561.89$ MER614723 TP Trailer Nut 76.06$ MER614723B12 TP Trailer Nut 71.42$ MER614743 TN Trailer Nut 58.92$ MER614743B12 TN Trailer Nut 55.33$ MER614836 FF Steer Nut 53.33$ MER614836B12 FF Steer Nut 50.08$ MER614837 FE Steer Nut 60.50$ MER614837B12 FE Steer Nut 56.81$ MER614973 R Drive Nut 66.39$ MER614973B12 R Drive Nut 62.33$ MER644723 TP Trailer Lock Ring 18.25$ MER644743 TN Trailer Lock Ring 14.14$ MER644836 FF Steer Lock Ring 12.78$ MER644837 FE Steer Lock Ring 14.50$ MER644973 R Drive Lock Ring 15.92$

MERITORDOCTOR PRELOAD® TOOLS and TEMPER-LOC® NUTS

U.S. LIST PRICEJanuary 2015

Doctor Preload® Bearing Adjustment Tools &

Temper-Loc® Spindle Nuts

Who is Temper Companies? • Founded in 1969 in Fonda, NY by John Rode

• Focused on Bearing Adjustment in Multiple Industries

– Marine, Fuel Systems, Aircraft Engines, & Commercial Vehicles (millions sold annually)

– Designed Load Rings to Provide Precise Bearing Loads

• Exclusive Distribution Agreement with Meritor in North America

2 2

MERITOR and TEMPER PRODUCTS ADD VALUE INDUSTRY ISSUE: Increased brake life demands longer-life wheel end components. Fleets experiencing wheel end issues including ABS faults, wheel seal and bearing premature failures and reduced brake shoe life. MERITOR® SOLUTION: Doctor Preload® and Temper-Loc® Nut System for optimum long-life wheel-end performance.

Doctor Preload, when used in conjunction with Temper-Loc spindle nuts, is the ideal wheel-end bearing adjustment solution. The system sets the bearings to precise preload settings with a quick, simple, reliable and repeatable process limiting future wheel end issues.

Features and Benefits Doctor Preload • Measured, precise, repeatable settings to optimal preload for more time on the road • Improved tire life • Optimal bearing, spindle and wheel seal life • Decreased ABS faults • Adjusts wheel-end bearings to meet SAE J2535 recommended preload settings Temper-Loc Spindle Nuts • Heat-treated nut face for superior strength • Fingertip control retainer ring for ease of placement and positioning • EasyView™ verification of positive locking

Competitive Analysis Stemco ProTorq nuts are one-piece lock nuts but, do not help maintain preload. ConMet Preset hubs are very expensive.

Meritor Value The Doctor Preload and Temper-Loc spindle nut system provide optimal preload for more time on the road. Fleets and end users no longer need to worry about the results of excessive end play such as extreme wear on bearings, spindles, tires, and wheel seals or possible anti-lock braking system (ABS) faults. The system helps avoid costly downtime, improves tire life and increases productivity.

Tapered Roller Bearings Overview

4

• An Assembly of Loose Parts

• Rollers not Aligned

• Applied Force Aligned Rollers and Improved Performance

• Our Program Improves the Life of Roller Bearings and Wheel Ends!

Why Has the Industry Used End-Play?

• Technology and Maintenance Council (TMC) – RP618 – Wheel Bearing Adjustment Procedures – Held up as the standard

• In reality, it is a procedure for a multi-part jam nut

• Why End Play and Not Preload for Class 8 Wheel Ends? 1. There is no method to measure preload in wheel end

bearings • until the introduction of Doctor Preload® bearing

adjustment tools 2. “Pre Set” options are very expensive

5

• Truck and Bus Wheel Committee – Members include engineers of bearing and seal

manufacturers – Reports to Brake and Stability Control Steering Committee

• Developed Recommended Practice (SAE J2535)

– “Setting Preload in Heavy-Duty Wheel Bearings” – Bearing and seal manufacturers agree on preload targets

The Basis for Preload Settings

6

Preload Benefits

• Reduced tire costs – Improved mileage due to elimination of edge wear – Small investment per wheel end – ROI within six months

• Reduced wheel seal leaks and failures

– Eliminates axial movement of seal components

• Longer bearing life and fewer wear issues • Reduced ABS faults

7

Why Our Solution?

• Doctor Preload Bearing Adjustment Tools – Establishes Light Preload to Improve Wheel End Performance – Quick, Easy and Repeatable Process (Adjusts & Measures at

the Same Time) – Final Load Settings Reduced from .008” to less than .002” – Takes Torque Out of The Equation (Preload Cannot Be

Predicted Using Torque) • Easy-to-Install Temper-Loc Single-Piece Spindle Nuts

– Holds Bearings in Preload When Installed with the Tool – Won’t Back Off

8

Affirms Optimal Bearing and Seal Performance at Light Preload Bearing Settings Rather Than “Loose” End Play Settings

Commercial Opportunity

• Fleet Conversions (Tractors, Trailers, and Dollies) – Every Shop Needs a Set of Doctor Preload Tools – Every Wheel End Needs a Temper-Loc Nut – The ROI on Tires Self Funds the Conversion – The Benefits Don’t Happen Unless the Wheel End is

Converted to Preload

9

Doctor Preload & Temper-Loc Product Offering

10

SP - 1520

• Product Offering – 6 Bearing Adjustment Tools (Doctor Preload) – 5 Temper-Loc Spindle Nuts

Doctor Preload Bearing Adjustment Tools Dr. Preload Tool Part

Number Use with Temper Loc

Nut Axle Spindle Application Axle Applications

MER415005 MER614723 TP Trailer Meritor TP, Dana, Eaton (P22), Propar, Fruehauf

MER415003 MER614743 TN Trailer

Dana Spicer (D20,D21,D22,DD22,K21,K25,K30),Hendrickson (HN),Ingersoll (A22T),Eaton (C,C2,CD,CD2,CE,ESA225J,EST,EST225J,EST230J, ETA230C,ETA225D,ETA225J,H23L,H25R,HCE,HJ,HJE,LA15,T18C,20L-77,22L,22R,J,JE,JH,23L,23R,25R), Meritor (F,H,RL,RQ,TK,TKL,TKLD,TL,TLD,TN,TND,TO,TQC,TQD),Standard Forge (A25,A26, 17,000lbs., 18,000lbs. trade)

MER415084 MER614743 TN Trailer w/ Aluminum Hubs

Dana Spicer (D20,D21,D22,DD22,K21,K25,K30),Hendrickson (HN),Ingersoll (A22T),Eaton (C,C2,CD,CD2,CE,ESA225J,EST,EST225J,EST230J, ETA230C,ETA225D,ETA225J,H23L,H25R,HCE,HJ,HJE,LA15,T18C,20L-77,22L,22R,J,JE,JH,23L,23R,25R), Meritor (F,H,RL,RQ,TK,TKL,TKLD,TL,TLD,TN,TND,TO,TQC,TQD),Standard Forge (A25,A26, 17,000lbs., 18,000lbs. trade)

MER415002 MER614836 FF Steer Meritor (FD900,FD901,FD961,FE900,FE903,FF900,FF901,FF921,FF931,FF932,FF933,FF941,FF942,FF943,FF944,FF952,FF961,FG941) Spicer (1100S)

MER415347 MER614837 FE Steer Meritor (FE931), Eaton (EFA12FA,EFA12FA,EFA13FS,E12001,FE931,12K,13.2K), Ford Sifco 12K,Ford 6K

MER415004 MER614973 R Drive Eaton (P22), Ford, Rainstar, Meritor (TR)

11

Temper-Loc Spindle Nuts • Only Temper-Loc Spindle Nuts Can be used with Doctor

Preload adjustment tools – Special Chamfered Face to Accommodate the Tool – Cannot use Stemco’s ProTorq with Doctor Preload

Tools • Temper-Loc Can replace Stemco Pro-Torq® nuts

(see chart below) • TN & TP Nuts Approved for Production Meritor Trailer

Axles

12

Temper Loc Nut Assembly Number

Replaces Stemco Number

Replacement Retainer Ring

Number Axle Spindle Application

Thread Diameter

Threads Per Inch Tool Socket Size Outer Bearing

MER614723 447-4723 MER644723 TP Trailer 3.480" 12 4-13/16" - 8 point HM518445 / HM518410

MER614743 447-4743 MER644743 TN Trailer 2.625" 16 3-3/4" - 8 point HM212049 / HM212011

MER614836 448-4836 MER644836 FF Steer 1.500" 12 2-1/2" - 6 point 3782 / 3720

MER614837 448-4837 MER644837 FE Steer 1.500" 18 2-1/2" - 6 point 3782 / 3720

MER614973 449-4973 MER644973 R Drive 3.250" 12 4-3/8" - 8 point 580 / 572

Tool & Nut Program Details • Doctor Preload Tools

– Packaged in a Temper box with a Meritor label – In the Box:

• Tool calibration certificate • How to use the tool instructions • Warranty registration card

• Temper-Loc Nuts & Retainer Rings

– “12-packs” – 12 Nuts, Retainer Rings, and Installation Instructions • Packaged in a Temper box with a Meritor label • Bulk Packs Designed for fleets doing conversions

– Single-Nut Pack – 1 Nut, Retainer Ring, and Installation Instruction • Packaged in a Meritor box with a Meritor label • Designed For over-the-counter sales

– Retainer rings will be available – can only be used with Temper-Loc nuts • Packaged in a Meritor box with a Meritor label • 2 Retainer rings per box

13

Pricing & Warranty Program • Pricing: (Suggested Dealer Net)

– “12-packs” (part numbers end in “B12”) Up to 16% below Stemco Pro-Torq

– Single pack boxes Up to 8% below Stemco Pro-Torq

• Warranty: – Doctor Preload Tools

• 1 Year After Sale - Must Register Tool Using Provided Registration Card • The Doctor Preload tool registration card must be completed, with copy of

purchase invoice, and returned to Pete Freeman, Florence – Temper-Loc Nuts

• 3 Years From Date of Installation (must provide supporting documentation)

14

Sales Support

• Training videos on Bullpen (Jan 2015) • Demo Stands with Tools and Nuts for Training Trucks (Jan 2015) • Product brochure – SP-1520 (Dec 2014)

– What is preload – Fleet testimonials – Product description / features & benefits – Warranty statement

15

Questions?

Quick Start Instructions for Doctor Preload® FOR USE WITH DOCTOR PRELOAD TOOLS FOR DRIVE AXLES

R SPINDLES

TEMPER AXLE PRODUCTS CORPORATION ALL PRODUCTS INVENTED AND MADE IN USA! WWW.DOCTORPRELOAD.COM

NOTE: USE DOCTOR PRELOAD ONLY WITH CONVENTIONAL WHEEL ENDS. REMOVE ALL BEARING SPACERS FROM PRE-ADJUSTED HUB ASSEMBLIES BEFORE ADJUSTING WITH DOCTOR PRELOAD. DO NOT ATTEMPT TO ADJUST A UNITIZED HUB ASSEMBLY USING THE DOCTOR PRELOAD SYSTEM. USE DOCTOR PRELOAD ONLY WITH TEMPER-LOC® SPINDLE NUTS. To 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.

Before Starting Bearing Adjustment: Inspect all wheel end components. Repair any damage to the spindle threads so that the Temper-Loc spindle nut

is able to thread completely onto the spindle.

Prepare the Wheel End for Bearing Adjustment:

Always be sure the hub is fully seated before adjusting with Doctor Preload. Thread the correct size Temper-Loc

nut onto the spindle. Using a bar and socket, tighten the Temper-Loc nut to drive the hub solidly against the axle.

Loosen the nut one half turn. Finally, hand tighten the nut until it first touches the face of the outer bearing.

Six Simple Steps:

1) ATTACH DOCTOR PRELOAD TO THE END THREADS OF THE SPINDLE: Using a downward sweeping motion, guide

the two spring-loaded load arms around two flats of the nut (not over any of the “points” of the nut) while

engaging the keyway locator in the keyway. Use the end tabs on the load arms to control the load arms. Engage

the spindle adapter thread on the spindle with three turns of the star-handle.

Check to be sure the tips of the load arms are properly located around the edge of the backface of the Temper-

Loc nut and that they make contact with the outer bearing cone. See the diagram below.

Top View of Spindle with Doctor Preload

Mounted and Properly Aligned.

(Continue Instructions on Reverse Side)

http://www.doctorpreload.com/

2) SEAT THE BEARING ROLLERS: Tighten the T-handle by turning it clockwise. Load the bearings until the needle

pointer on the Doctor Preload gage reaches the green ‘Roll-in Zone.’ Spin the hub at least 3 full turns in any

one direction to seat the bearing rollers.

The load may drop slightly when rolling in the bearings – this is

normal. If the needle pointer drops out of the “Roll-in Zone”, tighten

the T-handle until it returns to the “Roll-in Zone” and spin the hub

three full turns again. Repeat until the needle pointer stays in the

“Roll-in Zone.” Do not spin the hub again after this step.

The load arms and the keyway locator should NOT be in contact

with the Temper-Loc nut or any part of the hub during this step. If

this occurs, remove Doctor Preload and start over by fully seating

the hub as described in “Prepare Wheel End for Bearing

Adjustment” above. Do not hand tighten the Temper-Loc nut

against the bearing while the needle pointer is in the green “Roll-In

Zone”. Caution: Applying excess force (moving the needle pointer

above the “Roll-In Zone”) can damage the Doctor Preload tool.

3) SET THE BEARINGS: Loosen the T-handle by turning it counterclockwise slowly until the needle pointer on the

Doctor Preload gage reaches ‘Set Drive/Trailer Axle.’ Do not go past the set point; if the set point is overshot,

go back to Step 2 and repeat in order to seat the bearing rollers.

4) LOCK IN THE BEARING SETTING: Hand tighten the Temper-Loc nut to align the furthest possible index dot with

the hash mark on the keyway locator and/or the load arms. When hand tightened, if the hash mark lines up in

the space between two dots, loosen the nut a fraction of the space to align the next dot with the hash mark.

5) REMOVE DOCTOR PRELOAD FROM THE SPINDLE: Completely loosen the T-handle by turning it

counterclockwise until the load shown on the gage drops to zero. Hold the gage-guard handle to support the

weight of the tool, and then loosen the star-handle by turning it counterclockwise. When the tool is detached

from the spindle, gently rotate Doctor Preload until the two load arm tips are positioned over two flats of the

nut and pull straight back so that the load arms and keyway locator will slide back around the nut.

6) INSTALL THE RETAINER RING: First install the EasyView® center tab of the retainer ring in the Temper-Loc nut,

engaging the key in the keyway at the same time. See below. Push in on each end finger tab, one at a time, to fit

each tab into the nut groove.

Retainer Tab entering groove. Retainer Tab secured in groove.

ALWAYS INSPECT THE FINAL ASSEMBLY. Ensure that there is a yellow retainer ring inserted in the nut. CHECK THAT ALL

THREE EasyView TABS AND THE LOCKING TEETH OF THE KEY ARE FULLY SEATED IN THE NUT. The EasyView notches of all

three tabs must be completely hidden in the groove of the nut. Failure to inspect the installation thoroughly could result

in component failure and bodily injury.

© Jan 2015 Temper Axle Products Corporation

Bulletin # TP10120

Quick Start Instructions for Doctor Preload® FOR USE WITH DOCTOR PRELOAD TOOLS FOR TRAILER AXLES

TN AND TP SPINDLES


NOTE: USE DOCTOR PRELOAD ONLY WITH CONVENTIONAL WHEEL ENDS.

REMOVE ALL BEARING SPACERS FROM PRE-ADJUSTED HUB ASSEMBLIES

BEFORE ADJUSTING WITH DOCTOR PRELOAD. DO NOT ATTEMPT TO ADJUST

A UNITIZED HUB ASSEMBLY USING THE DOCTOR PRELOAD SYSTEM. USE

DOCTOR PRELOAD ONLY WITH TEMPER-LOC® SPINDLE NUTS. To 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.

Before Starting Bearing Adjustment:

Inspect all wheel end components. Repair any damage to the spindle threads so that the Temper-Loc spindle nut






Six Simple Steps:


the spring-loaded load arms around the nut while engaging the keyway locator in the keyway. Engage the

spindle adapter thread on the spindle with three turns of the star-handle.





























5) REMOVE DOCTOR PRELOAD FROM THE SPINDLE: Completely loosen the T-handle by turning it counterclockwise

until the load shown on the gage drops to zero. Hold the gage-guard handle to support the weight of the tool, and

then loosen the star-handle by turning it counterclockwise. When the tool is detached from the spindle, gently

pull Doctor Preload straight back, and the load arms and keyway locator will slide back around the nut.








in component failure and bodily injury. © Jan 2015 Temper Axle Products Corporation

Bulletin # TP10121

Quick Start Instructions for Doctor Preload® FOR USE WITH DOCTOR PRELOAD TOOLS FOR TN AXLES*

TN-AH* Tools for TN SPINDLES *For Use with Certain Aluminum TN Spindle Trailer Hubs


NOTE: USE DOCTOR PRELOAD ONLY WITH CONVENTIONAL WHEEL ENDS.

REMOVE ALL BEARING SPACERS FROM PRE-ADJUSTED HUB ASSEMBLIES

BEFORE ADJUSTING WITH DOCTOR PRELOAD. DO NOT ATTEMPT TO ADJUST

A UNITIZED HUB ASSEMBLY USING THE DOCTOR PRELOAD SYSTEM. USE

DOCTOR PRELOAD ONLY WITH TEMPER-LOC® SPINDLE NUTS. To 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.

Before Starting Bearing Adjustment: Inspect all wheel end components. Repair any damage to the spindle threads so that the Temper-Loc spindle nut






Six Simple Steps:


the two spring-loaded load arms around two flats of the nut (not over any of the “points” of the nut) while

engaging the keyway locator in the keyway. Use the end tabs on the load arms to control the load arms. Engage

the spindle adapter thread on the spindle with three turns of the star-handle.





























5) REMOVE DOCTOR PRELOAD FROM THE SPINDLE: Completely loosen the T-handle by turning it

counterclockwise until the load shown on the gage drops to zero. Hold the gage-guard handle to support the

weight of the tool, and then loosen the star-handle by turning it counterclockwise. When the tool is detached

from the spindle, gently rotate Doctor Preload until the two load arm tips are positioned over two flats of the

nut and pull straight back so that the load arms and keyway locator will slide back around the nut.








in component failure and bodily injury.

© Jan 2015 Temper Axle Products Corporation

Bulletin # TP10122

meritor wheel bearing adjustment system for the …

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