IDENTIFICATION
GUIDE
TRAILER SUSPENSION
AND AXLE SYSTEMS
LIT NO: L977
DATE: March 2019

REVISION: H

TABLE OF CONTENTS
HOW TO IDENTIFY A MODEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
WHERE TO FIND ID TAG ON HENDRICKSON AIR SUSPENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
WHERE TO FIND ID TAG ON HENDRICKSON NON-INTEGRATED TRAILER AXLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL GUIDELINES FOR INTERPRETING SUSPENSION DESCRIPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL GUIDELINES FOR INTERPRETING NON-INTEGRATED AXLE DESCRIPTIONS. . . . . . . . . . . . . . . . . . . . . . . . 14
SUSPENSION IDENTIFICATION GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slider Suspensions — Van / Reefer Applications (HS Series, HK™ Series, VANTRAAX® and ULTRAA-K®) . . . . . . . . . . . .
Slider Suspensions — Platform Applications (INTRAAX®-SP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Primary Suspensions — Vocational Applications (HT ™ Series). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Primary Suspensions — Vocational Applications (INTRAAX®). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self-Steer Suspensions — Vocational Applications (CONNEX™-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Primary Suspensions — Vocational Applications (CONNEX™) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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IDENTIFICATION GUIDE — TRAILER SUSPENSION AND AXLE SYSTEMS

HOW TO IDENTIFY A MODEL

R

VANTRAAX 15186
HKANT40KH9 16RHL77
DESC.
CUST. PT. NO. 08302655-08
LI1101030234
SERIAL NO.
MODEL

STEP 1. Find the identification tag on the suspension
or trailer axle model by referencing the following
chart for tag location.

CAPACITY

SUSPENSION/AXLE ONLY

40K/20K

LB
R

STEP 2. If no tag is found, contact the trailer
manufacturer with the necessary information
(i.e. trailer serial number) to determine what
suspension model is on the trailer.

This article is covered by at least one or more of the following
U.S. and/or foreign patents and/or pending U.S. and/or foreign
patent applications. See www.hendrickson-intl.com/patent for a
complete listing.

Identification Tag
(VANTRAAX™ Tag Shown Above)

STEP 3. If no suspension model can be obtained
by completing steps 1 and 2, refer to the
following pages to help determine what
suspension model is on the trailer.
See instructions on page 4.

MODEL

UBL-004

This article is covered by
at least one or more of
the following U.S. and/or
foreign patents and/or
pending U.S. and/or

foreign patent applications. See
www.hendrickson-intl.com/patent
for a complete listing.

TM
R

Identification Tag
(UBL™ Tag Shown Above)

WHERE TO FIND ID TAG ON HENDRICKSON AIR SUSPENSIONS
SUSPENSION MODEL
T Primary Suspension
HT™ Series Primary Suspension
INTRAAX® Primary Suspension System
CONNEX™-ST Trailer Self-Steer Suspension
CONNEX™ Primary Suspension System
HS Slider with HT Suspensions
INTRAAX-SP Slider Suspension System
HK™ Slider Suspension

TAG LOCATION
Front of roadside frame bracket or inside of curbside beam
Inside of curbside beam
Inside of curbside beam
Inside of curbside beam
Inside of curbside beam
Front cross member on HS box
On roadside front frame bracket gusset
On roadside slider box side rail above front frame bracket
On roadside slider box side rail above front frame bracket;
also has blank INTRAAX tag on inside of curbside beam

VANTRAAX® Slider Suspension System
ULTRAA-K® Air Slider Suspension System
INTRAAX / HT /
CONNEX-ST / CONNEX
Inboard side of curb
side trailing arm

On roadside front frame bracket

ULTRAA-K
Roadside on front
of frame bracket

VANTRAAX / HKBOX
Roadside front of side
rail on slider box

UBL
Roadside of lift bracket

R

R

MODEL

TY
ONLY
CAPACI
/AXLE

DESC.
PT. NO.
CUST.
NO.
SERIAL

LB

SUSPENSION

MODE

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L977 Rev H

IDENTIFICATION GUIDE — TRAILER SUSPENSION AND AXLE SYSTEMS

WHERE TO FIND ID TAG ON HENDRICKSON NON-INTEGRATED TRAILER AXLES
The model number, customer part number (if applicable), a description and a serial number are imprinted on an
ID tag that is attached to the axle (as shown below).
Before November 2010, trailer axle product ID tags were made of mylar and located near the center of the axle
beam. After November 2010, trailer axle products have a stainless steel ID tag located on the inside edge of the
brake chamber bracket.
The part number is used to identify the axle specifications. This number should be referred to when contacting
Hendrickson to determine the appropriate service parts. The serial number is used to identify a particular axle along
with all of the component parts as specified by the customer at the time of order. The axle description serves as a
generic description of the axle assembly and can be used to determine some axle configuration parameters.

NEW

Straight Axle

Location of New Stainless Steel ID Tag —
On Brake Chamber or near Center of Axle

AUSTRALIAN

MODEL
CUS
P/N

AXLE

TM

HTA

DESC
S/N

MANUFACTURED
THE
FOLLOWING UNDER
U.S.
PATENT
PATENTS:ONE
6926122,
OR MORE
NOS.:
7559521, 7273082,
6024417,
OF
MEXICAN 7585031, 7506940,
6725743,
248384, PATENTE 7731300
7537224,
251415,
NOS.:
259900 223713,
243519

PATENT
535511,
AND
OTHER
NOS:
536263
PENDING
510161,
ISSUED
U.S.
FOREIGN
AND
FOREIGN
PATENTS
PATENTS.

2002320074, PATENT
2006287900,
NOS.:
2003243658,
NEW
739422,
ZEALAND 2006302001
527792,
2004220148

Mylar ID Tag —
Located Near Center of Axle

AND

OLD

New Stainless Steel ID Tag for Trailer Axles

MODEL
CUS P/N

TRLAXLE 2947
DETERMINED BY CUSTOMER

MANUFACTURED UNDER ONE OR MORE OF
THE FOLLOWING PATENTS:
U.S. PATENT NOS.: 6024417, 6725743,
6926122, 7273082, 7506940, 7537224,
7559521, 7585031, 7731300
MEXICAN PATENTE NOS.: 223713, 243519
248384, 251415, 259900

DESC
S/N

L977 Rev H

3

AUSTRALIAN PATENT NOS.: 739422,
2002320074, 2003243658, 2004220148
2006287900, 2006302001
NEW ZEALAND PATENT NOS: 510161,
527792, 535511, 536263
AND OTHER ISSUED FOREIGN PATENTS AND
PENDING U.S. AND FOREIGN PATENTS.

HN-S505-0774-WF1607-BHM----SK131010XXXX

HTA

TM
AXLE

IDENTIFICATION GUIDE — TRAILER SUSPENSION AND AXLE SYSTEMS

GENERAL GUIDELINES FOR INTERPRETING SUSPENSION DESCRIPTIONS
INTRAAX®
Model: INTRAAX.85901

DESCRIPTION: AANT23K 14RHL 77N ST X7 SHD
Duty Cycle

Suspension
Capacity

Pivot
Connection Beam
Profile

Axle
Track

Axle
Ride Diameter Spindle
Height

Axle
Wall