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

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ranty
r war

.

oses

purp

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.

As a world leader in providing aftermarket
solutions for the global commercial vehicle and
industrial markets, Meritor is committed to providing 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.

Meritor Heavy Vehicle Systems, LLC
7975 Dixie Highway
Florence, Kentucky 41042 USA

888-725-9355 U.S.
800-387-3889 Canada
MeritorPartsOnline.com
meritor.com

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

MERITOR
DOCTOR PRELOAD® TOOLS and TEMPER-LOC® NUTS
STORE SUGGESTED STOCK LEVELS
January 2015
PART NO.
MER415002
MER415003
MER415004
MER415005
MER415084
MER415347
MER614723
MER614723B12
MER614743
MER614743B12
MER614836
MER614836B12
MER614837
MER614837B12
MER614973
MER614973B12

DESCRIPTION
FF Steer Tool
TN Trailer Tool - Cast Hub
R Drive Tool
TP Trailer Tool
TN Trailer Tool - Aluminum Hub
FE Steer Tool
TP Trailer Nut
TP Trailer Nut
TN Trailer Nut
TN Trailer Nut
FF Steer Nut
FF Steer Nut
FE Steer Nut
FE Steer Nut
R Drive Nut
R Drive Nut

ENTRY
LEVEL
MEDIUM
0
0
0
1
0
1
0
1
0
1
0
0
10
20
24
48
10
20
24
48
4
8
0
12
0
0
0
0
8
16
12
36

LARGE
1
1
1
1
1
0
54
132
44
108
18
48
0
0
36
84

MERITOR
DOCTOR PRELOAD® TOOLS and TEMPER-LOC® NUTS
U.S. LIST PRICE
PART NO.
MER415002
MER415003
MER415004
MER415005
MER415084
MER415347
MER614723
MER614723B12
MER614743
MER614743B12
MER614836
MER614836B12
MER614837
MER614837B12
MER614973
MER614973B12
MER644723
MER644743
MER644836
MER644837
MER644973

DESCRIPTION
FF Steer Tool
TN Trailer Tool - Cast Hub
R Drive Tool
TP Trailer Tool
TN Trailer Tool - Aluminum Hub
FE Steer Tool
TP Trailer Nut
TP Trailer Nut
TN Trailer Nut
TN Trailer Nut
FF Steer Nut
FF Steer Nut
FE Steer Nut
FE Steer Nut
R Drive Nut
R Drive Nut
TP Trailer Lock Ring
TN Trailer Lock Ring
FF Steer Lock Ring
FE Steer Lock Ring
R Drive Lock Ring

January 2015
LIST PRICE
$
1,561.89
$
1,561.89
$
1,700.67
$
1,642.06
$
1,757.36
$
1,561.89
$
76.06
$
71.42
$
58.92
$
55.33
$
53.33
$
50.08
$
60.50
$
56.81
$
66.39
$
62.33
$
18.25
$
14.14
$
12.78
$
14.50
$
15.92

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

Competitive Analysis
Stemco ProTorq nuts are one-piece lock
nuts but, do not help maintain preload.

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.

ConMet Preset hubs are very
expensive.

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

Tapered Roller Bearings Overview
• 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!

4

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

The Basis for Preload Settings

•

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

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

Affirms Optimal Bearing and Seal Performance at Light Preload
Bearing Settings Rather Than “Loose” End Play Settings
8

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

SP - 1520