Table of Contents
Introduction......................................................... 2
Video Gallery........................................................ 3
Required Axle Dimensions & Features.................... 4

Options for Spring Suspension Axles......................... 4
Options for Torflex® Suspension Axles........................ 4
Dexter Medium Duty Utility Axle Beam Features........ 5
Torflex® Axle Beam Features...................................... 5

9K-10K GD Capacity:
#13G Torflex®/D90-D100G Leaf Spring................ 6

Torflex® Application Information................................. 6
9K, 10K, and #13G General Duty Two-Piece Hubs..... 7
9K, 10K, and #13G General Duty One-Piece Hubs.... 8
9K, 10K, #13G, #14T General Duty Two-Piece Hubs.. 9

10K-15K Capacity:
#13D &#14 Torflex® /
D100, D120 & D150 Leaf Spring.......................... 10

Suspensions....................................................... 20

Dexter Axle Suspension System..............................20
Cross Frame Hanger Reinforcement........................20
Single Slipper........................................................ 21
Kits for 2" Wide Springs..........................................21
Kits for 2¹⁄₂" Wide Springs ³⁄₄" Spring Eye Bolts......22
Kits for 3" Wide Springs..........................................23
Double Slipper....................................................... 24
HDSS Underslung...................................................24
HDSS Overslung.....................................................25

Airflex® Suspension........................................... 26
Wheel & Hub Assembly........................................ 27

10,000 Lb. Heavy Duty Wheel & Hub Assembly......27
12,000 Lb. Wheel & Hub Assembly........................28
15,000 Lb. Wheel & Hub Assembly........................28

Wheels and Tires................................................. 29

Torflex Application Information 12,000 Lbs.........10
10K, 12K, 15K, #13D, and #14 Hubs.....................11

Axle Overhang..................................................... 29

Medium Duty Axle Brakes.................................... 12

Bearing Adjustment............................................ 30

®

Electric Brakes....................................................... 12
Forward Self-Adjusting Electric Brake......................12
Typical Electric Brake Wiring Diagram......................12
Electric Brake Parts - Cast Backing Plate.................13
Electric Brake Parts - Stamped Backing Plate.........14
Hydraulic Brakes.................................................... 15
Forward Self-Adjusting Hydraulic Brake & System
Diagram.................................................................15
Hydraulic Brake Parts.............................................16
Disc Brakes........................................................... 17
10K, 12K, #13G, #13D and #14 Hydraulic Disc
Brake.....................................................................17
Hydraulic Disc Brake Parts......................................17
Air Brakes.............................................................. 18
Dexter “S” Cam Brake.............................................18
Small “S” Head Hi-Rise 28 Spline...........................18
Typical Air Brake System Diagram...........................18
Air Brake Parts – “PQ” Style.....................................19

Oil Lubrication Specification............................... 30
Warranty............................................................ 31
Locations........................................................... 32

INTRODUCTION

Introduction
This information is intended as a guide for the proper
specification and application of Dexter Axle running gear,
associated components and accessories.
Dexter offers a full line of trailer axles that can be used in many
different applications. When specifying any pre-engineered
components such as axles, it is the responsibility of the trailer
designer to insure compatibility with the vehicle and all of its
sub‑systems.
Information
The information presented is meant to assist trailer
manufacturers in the specification of their running gear
components. Dexter Axle does not warrant that the information
given constitutes an approved trailer design or application.
Dynamic loading, travel requirements unique to the trailer design,
unusual service conditions, trailer configurations, unequal
load distribution, hitch or coupler arrangements and towing
vehicle suspension characteristics can significantly affect the
performance of any trailer axle and/or suspension systems. It
remains the responsibility of the trailer manufacturer to evaluate,
specify and test their trailer/running gear combination before
production and to certify it as such. While the information
presented at the time of this writing is current, it is subject to
change as designs and components evolve over time.
Disclaimer of Warranty and Limitation of Liability
All users of this product catalog acknowledge that the
information presented is significantly affected by factors
within the exclusive knowledge of the user including, among
other things, service conditions, trailer configurations, load
distributions, hitch and coupler arrangements and tow vehicle
suspension characteristics, that the users have independently
investigated these factors and have solely relied on those
investigations when using this catalog, and that it is the
responsibility of the user to adequately specify, evaluate and test
its trailer/running gear combinations.
DEXTER AXLE DISCLAIMS ALL WARRANTIES,
WHETHER WRITTEN, ORAL OR IMPLIED, IN FACT
OR IN LAW (INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE), ASSOCIATED WITH THE USE OF THE
CATALOG AND WITH ANY INFORMATION PRESENTED
BY THIS CATALOG.
Dexter Axle shall not be liable in damages (whether
compensatory, punitive, direct, indirect, special, incidental or
consequential) to any user of this catalog under contract, tort,
strict liability or any other theory of liability, and any user agrees
to indemnify and hold Dexter Axle harmless from any and all
claims, actions or other proceedings (including attorney fees and
court costs) arising out of the use of this catalog to the extent
said claims, actions or other proceedings do not arise out of the
sole and exclusive negligence of Dexter Axle.
Load Ratings
The maximum load carrying capacity of any assembly is limited
2 | 2019.01

to the lowest load rating of any individual component selected.
For instance, the load rating of a pair of wheels may be lower than
other axle components selected. If this is the case, the load carrying
capacity of the axle assembly is reduced accordingly. As a specific
example, if a pair of wheels is rated at 1500 pounds each and is
used with other components rated at 4000 pounds per axle, the
maximum load capacity is limited to 3000 pounds. If two tires are
rated at 1400 pounds each and are used on this assembly, the
maximum load carrying capacity is limited to 2800 pounds.
Axle Orientation
When working with trailer running gear, it is important to
understand the various features and descriptions of the
equipment. Most trailer axles are directional by nature, that is, it
is imperative that they be installed onto the trailer in the proper
manner to ensure brake functioning and correct wheel alignment.
The front of the axle must be oriented toward the front of the
trailer. The convention used to define right and left is based on
viewing the trailer from the rear and facing in the direction of
forward travel.
Features to help identify the front of the axle:
• Electric brake wires exit brake backing plates toward the rear
of the axle.
• 12¹⁄₄" hydraulic brakes have view ports through the dust
shield on the back of the assembly. Where the brake lining
is visible in the view port, that will indicate the rear or
secondary shoe which is always oriented toward the rear of
the axle.
• Slipper springs have the spring eye at the front of the axle.
• Leaf spring axles with inner wiring have the wires exit the tube
toward the rear of the axle.
• Torflex® axles have the wheel center trailing behind the axle
tube.
• Axles using ³⁄₄" spherical ball seat wheel nuts will have right
and left handed threads. The right handed thread must be on
the right end or curb side of the axle while the left handed
thread will be on the left end or road side of the axle.
Stub Axle Disclaimer
A stub axle is described as a trailer axle spindle, welded to
a short length of tubing. Stub axles may be specified and
purchased as plain spindle/tube weldments or they may be fully
assembled wheel end units, with or without trailer brakes.
These incomplete axles are sold to manufacturers who wish to
incorporate them into a variety of applications such as specialty
vehicular axles, belt tensioning devices, machinery pivot points, etc.
DEXTER AXLE HAS NO CONTROL OF THE DESIGN
INTENT OF THESE SPECIAL APPLICATIONS AND
THEREFORE CANNOT APPLY A RATING OR CAPACITY
TO THESE COMPONENTS.
The spindle/tube connection has been designed for suitable
stress levels when used in a trailer axle, mounted to an approved
suspension system and loaded to no more than the stated

MEDIUM DUTY CATALOG

9,000-15,000 LBS. AXLE CAPACITY

Introduction

INTRODUCTION

capacity. The use of all or part of the product for applications
other than its intended purpose may not be appropriate. It is the
customers’ responsibility to determine the efficacy and safety of
their particular application.
Torflex® axles can also be purchased as stub axles. This type of
axle incorporates a self-contained suspension system. They can
be specified as stub assemblies that will be rated for capacity
when fitted with approved mounting brackets. The stated capacity
will be based on the lowest rated component in each assembly.
These stub assemblies are essentially half axles that are
intended to be mounted to the trailer chassis independent of
each other. The trailer manufacturer must assume responsibility
for the integrity of the attachment as well as the final wheel
alignment since independent mounting puts these critical
aspects out of Dexter’s control. If used in pairs of unequal
capacity, the trailer manufacturer should assign a Gross Axle
Weight Rating of not more than two times the capacity of the
lower rated sub assembly.

Video Gallery
In keeping with our continual commitment to industry safety and the development of innovative products, please feel free to view our
ongoing video gallery at www.dexteraxle.com/resources/videos or scan the following QR codes. We are confident these videos will
help educate and promote the Dexter product line that you, as our customer, are investing in.

Bearing
Maintenance

E/H Actuator
Installation

Electric Brakes

E-Z FLEX®
Suspension

TORFLEX®
Suspension Axles

E-Z LUBE®
System

Genuine Brakes

Genuine
Replacement Parts

Leaf Spring
Axles

Sway Control

Manual Bleed
Hydraulic Disc

Medium Duty
Axles

Nev-R-Adjust®
Brakes

Power Bleed
Hydraulic Disc

Removable
Spindle

MEDIUM DUTY CATALOG
9,000-15,000 LBS. AXLE CAPACITY

2019.01 | 3

REQUIRED AXLE DIMENSIONS & FEATURES

Options for Spring Suspension Axles
Hubface — Track Width — Spring Center

Wheel Offset

Axle Spacing
Center Hanger
Spacing

Front Hanger
Spacing

Min. Recommended
Tire Clearance

Rear Hanger
Spacing

Frame
Static Bump
Clearance

Tire
Radius

Tire Center

Overall
Tire Height

Frame
Height
Ground
Clearance

Front

Front Axle
Spacing

Axle
Location

Static Loaded
Radius

Rear Axle
Spacing

Options for Torflex® Suspension Axles
Bracket Orientation

Standard
Orientation

Bracket Profile

Top
Mount

Reverse
Orientation

Side
Mount

4 | 2019.01

MEDIUM DUTY CATALOG

9,000-15,000 LBS. AXLE CAPACITY

Dexter Medium Duty Utility Axle Beam Features
Highest strength
axle tube generally
available for utility
vehicle axles.

•

Materials used allow
a stiffer and stronger
axle beam with no
camber required.

•

Precision Machined
Bearing Journals.

Precision Machined
Spindles. Replaceable
Unitized Oil Seal.

Brake Flanges are machined
to assure perpendicularity
and concentricity.

The backing plate of
the Dexter electric
or hydraulic brake
mounts on piloted
axle brake flange.
This assures that
brakes will perform
effectively.

High Strength Axle Tube.

Spindle is friction forged
onto axle tube for strength
and alignment.

Spindles are made of
forged carbon steel.

Spindle Detail

Torflex® Axle Beam Features
#13G – General Duty

#13D – Heavy Duty

#14

REQUIRED AXLE DIMENSIONS & FEATURES

•

Inspected for
proper alignment

Dexter
manufactured
brakes & hubs

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Forged torsion arm for
maximum strentgh

Heat-treated
solid steel bar

CAUTION: Triple axle assemblies are NOT recommended for #13 or #14 Torflex® axles.

MEDIUM DUTY CATALOG
9,000-15,000 LBS. AXLE CAPACITY

2019.01 | 5

9,000-10,000 GD CAPACITY

Torflex® Application Information
13

Articulation Dimensions
Dimensions are for high profile, top mount only. Side
mount is .31" higher. Allow 3" bump clearance from
full load.
No

Load

Full

Load

Shock

Load

H

L

H

L

H

L

Bracket
Profile

Start Angle

H

45° Down

High

7.18

4.24

5.24

5.54

4.24

5.83

32° Down

High

6.12

5.09

3.93

5.92

2.94

5.84

22.5° Down

High

5.24

5.54

2.94

6.00

1.90

5.91

10° Down

High

3.98

5.91

1.64

5.86

0.64

5.54

0°

High

2.94

6.00

0.64

5.54

-0.28

5.06

10° Up

High

1.90

5.91

-0.28

5.06

-0.11

4.42