NHTSA ID Number: 10162808
Manufacturer Communication Number: L809 Rev S
TSB/Document Date: 2019-07-15
Summary
Operation Name: Hendrickson Trailer Commercial Vehicle Systems Document Name: Brake Certifications; Certifications for Air Actuated Brakes Summary: This document provides Certificates of Compliance for various makes and types of brakes authorized for use on Hendrickson
INTRAAX, VANTRAAX and ULTRAA-K trailer suspension and axle systems and TRLAXLE non-integrated trailer axles.
BRAKE
CERTIFICATIONS
SUBJECT: Certifications for Air Actuated Brakes
LIT NO: L809
DATE: March 2019
REVISION: S
TABLE OF CONTENTS
INTRODUCTION: Determining Brake Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TIRE STATIC LOADED RADIUS (SLR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FMVSS121 & CMVSS121 (North America) – DRUM BRAKES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 5
FMVSS121 & CMVSS121 (North America) – DISC BRAKES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 7
ECE REGULATION 13 CERTIFICATION (Europe & Asia) – DRUM & DISC BRAKES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
BRAKE CERTIFICATIONS
Determining Brake Ratings
Brake ratings are determined by the selection of several components including brake model and lining, brake chamber size and stroke,
slack adjuster length and tire static loaded radius (SLR). For optimum performance, brakes should be selected based upon the maximum
required load that is needed for the application and no higher. Hub, suspension, axle and tire ratings may all differ on a given trailer, and
it is the minimum rated component of this group that determines the gross axle weight rating (GAWR).
Most North American on-highway applications only require brakes rated to 20,000 lb. GAWR. Suspension components may be specified
at higher ratings for increased durability purposes, however higher rated brakes (above 20,000 lb. GAWR) should only be selected when
running over weight or permitted loads. Using an overrated brake lining on your trailer can lead to excess brake torque which can result in
premature tire and brake wear, noise and trailer hop. Contact Hendrickson Engineering for assistance in specifying the appropriate brake
size for your application.
Reading the Tables
WHEN USED WITH:
BRAKE MODEL
LINING
BRAKE RATING
Entries in this
column indicate
the brake model,
size (drum
diameter and shoe
width)
and identifies the
Friction Material
Standards Institute
(FMSI) code for the
brake.
Entries in this
column indicate
the lining
manufacturer’s
name and
lining formula
designation.
Entries in this column indicate the
lowest and highest
Gross Axle Weight
Rating (GAWR) in
pounds for the given
lining certification.
Entries in this colEntries in this
column indicate size umn indicate length
of the air chamber of the slack adjuster
required to meet the in inches required to
meet the certificacertification for the
tion for the given
given lining certifilining certification.
cation.
The given
certification is valid
at any
GAWR at or between
the two stated values.
The first number
is the service chamber area (square
inch).
CHAMBER SIZE
The second
number is the
Parking Chamber
area #
(square inch).
SLACK LENGTH
Note: There may
be splits between a
given GAWR and the
slack length necessary to meet the
certification.
TIRE SLR
Entries in this
column indicate
lowest and
highest static loaded radius (SLR) for
the tires in inches
for the given lining
certification.
Note: There may
be splits between a
given GAWR and the
tire SLR range necessary to meet the
certification.
Minimum rated
stroke is listed in
[brackets].
Example: (Always read across the table for valid combinations)
BRAKE MODEL
LINING
BRAKE RATING
HENDRICKSON
16.5" × 7" HXS®
H20167XF
17,000 – 20,000
(F.M.S.I. 4707)
H23167XF
17,000 – 23,000
WHEN USED WITH:
CHAMBER SIZE
SLACK LENGTH
TIRE SLR
30/30
[2.5" stroke]
5.5" or 6.0"
17.0" – 20.8"
Example interpretations of the table entries:
16.5" × 7" HXS using H20167XF at 17,000 GAWR with 30/30 chamber, 5.5" slack and 20.8" SLR is valid.
16.5" × 7" HXS using H20167XF at 20,000 GAWR with 30/30 chamber, 5.5" slack and 19.3" SLR is valid.
16.5" × 7" HXS using H20167XF at 20,000 GAWR with 30 /30 chamber, 5.5" slack and 17" SLR is valid.
16.5" × 7" HXS using H20167XF at 17,000 GAWR with 30 /30 chamber, 6" slack and 17" SLR is valid.
2
L809 Rev S
BRAKE CERTIFICATIONS
Static Loaded Radius (SLR)
Brake lining, chamber size and stroke, and slack adjuster size directly affect the amount of torque a brake can achieve. Brake torque
is reacted through the wheel and tire, therefore the tire size will impact how much of that torque is converted to brake force. The static
loaded radius (SLR) is the distance from the center of the axle to the ground under maximum rated load when the tire is inflated to the
recommended pressure. For a given brake torque, as SLR increases, brake force decreases. It is important to ensure that you are using the
appropriate tires and brake components for the required brake rating.
Tire Rotation
e Torque
Brak
Static Loaded
Radius
(SLR)
Brake
Force
Road Friction Force
The charts below summarize standard on-highway trailer tire sizes and the typical static loaded radius (SLR) for trailer tread patterns.
Please consult the tire manufacturer for the exact SLR for the size, tread and load range of your specific tire.
RIM SIZE
17.5
19.5
22.5
L809 Rev S
TIRE SIZE
STATIC LOAD
RADIUS (SLR)
TIRE SIZE
STATIC LOAD
RADIUS (SLR)
9R17.5
15.4
275/80R22.5
18.4 - 18.6
10R17.5
15.6
295/75R22.5
18.5 - 18.7
215/75R17.5
14.1 - 14.2
385/55R22.5
18.1
235/75R17.5
14.3 - 14.7
385/65R22.5
19.5
245/70R17.5
14.2 - 14.5
425/65R22.5
20.3
245/70R19.5
15.3
445/65R22.5
20.8
265/70R19.5
15.7
445/50R22.5
18.1 - 18.6
285/70R19.5
16.1 - 16.2
455/55R22.5
19.6 - 19.4
445/45R19.5
16.3
11R24.5
20 - 20.3
11R22.5
19 - 19.3
275/80R24.5
19.1 - 19.2
255/70R22.5
16.9 - 17.1
285/75R24.5
19 - 19.5
275/70R22.5
17.4
RIM SIZE
22.5
24.5
3
BRAKE CERTIFICATIONS
FMVSS-121 / CMVSS-121 Brake Certification — Drum Brakes
Federal Motor Vehicle Standards specify that the original equipment manufacturer (OEM) is responsible for compliance
to Federal Motor Vehicle Safety Standard (FMVSS)-121 for air actuated brakes. In the United States, OEMs are self-certifying to the standard. In Canada, test data must be submitted to Transport Canada either directly or indirectly through the Canadian Transport Equipment
Association’s (CTEA) brake database (Note - CTEA database is available to CTEA members only).
As a service to our customers, Hendrickson Trailer Commercial Vehicle Systems provides this Consolidated Certificate of Compliance
for use with Hendrickson INTRAAX®, VANTRAAX® and VANTRAAX® ULTRAA-K® integrated suspension systems and TRLAXLE® non-integrated
axles. For every entry in the table, Hendrickson has data showing compliance to FMVSS-121 requirements. As an additional service to
Canadian customers who must provide parking test compliance data to Transport Canada, FMVSS/CMVSS-121 parking data is also available upon request for every table entry. This data is a part of the CTEA database. For certifications other than those listed in these
tables, please contact Hendrickson Brake Engineering for an application specific approval.
12.25" × 7.5" Brake Certificate of Compliance
This table certifies that the Hendrickson TRLAXLE non-integrated axles described below comply with the current revision of DOT 49 CFR 571.121
and Canadian Motor Vehicle Safety Standards, Service Brakes, Par. S5.4 and Parking Brakes, Par.5.6.1 when equipped as noted.
For certifications other than those listed below, please contact Hendrickson Brake Engineering for an application specific approval.
BRAKE MODEL
HENDRICKSON
12.25" × 7.5"
HXS®1
(F.M.S.I. 4692)
LINING
WHEN USED WITH:
BRAKE RATING
CHAMBER SIZE
SLACK LENGTH
TIRE SLR
15,000 – 17,000
24/242
[2.5" stroke]
5.5" or 6.0"3
14.3" – 15.6"
17,000 – 20,000
30/30
[3.0" stroke]
5.5" or 6.0"3
14.3" – 15.6"
15,000 – 17,000
24/242
[2.5" stroke]
5.5" or 6.0"3
14.3" – 15.6"
17,000 – 20,000
30/30
[3.0" stroke]
5.5" or 6.0"3
14.3" – 15.6"
H20127XF
H20127XH
1. 12.25" brakes are usually used with 17.5" wheel equipment. Users should review tractor brake configurations to assure correct brake balance.
2. Do not use older Type 24 service chambers rated at 1.75" stroke.
3. When 6.0" slacks are chosen, long stroke chambers are recommended.
15" × 8.625" HXS® Brake Certificate of Compliance
This table certifies that the Hendrickson INTRAAX integrated suspension system and TRLAXLE non-integrated axles described below
comply with the current revision of DOT 49 CFR 571.121 and Canadian Motor Vehicle Safety Standards, Service Brakes, Paragraph
S5.4, and Parking Brakes, Paragraph 5.6.1, when equipped as noted. For certifications other than those listed below, please contact
Hendrickson Brake Engineering for an application specific approval.
BRAKE MODEL
LINING
WHEN USED WITH:
BRAKE RATING
13,700 – 18,750
H20158XF
17,000 – 20,000
HENDRICKSON
15" × 8.625" HXS1
17,000 – 20,000
(F.M.S.I. 4710)
13,700 – 18,750
H20158XH
CHAMBER SIZE
SLACK LENGTH
24/242
[2.5" stroke] or
24/302
[2.5" stroke]
5.5" or 6.0"3
30/30
[2.5" stroke]
24/242
[2.5" stroke] or
24/302
[2.5" stroke]
17,000 – 20,000
30/30
[2.5" stroke]
17,000 – 20,000
6.0"3
TIRE SLR
14.9" – 16.3"
5.5" or 6.0"3
5.5" or 6.0"3
6.0"3
14.9" – 16.6"
5.5" or 6.0"3
1. 15" brakes are usually used with 19.5" wheel equipment. Users should review tractor brake configurations to assure correct brake balance.
2. Do not use older Type 24 service chambers rated at 1.75" stroke.
3. When 6.0" slacks are chosen, long stroke chambers are recommended.
4
L809 Rev S
BRAKE CERTIFICATIONS
FMVSS-121 / CMVSS-121 Brake Certification — Drum Brakes (Continued)
16.5" × 7" Brake Certificate of Compliance
This table certifies that the Hendrickson INTRAAX®, VANTRAAX® and VANTRAAX® ULTRAA-K® integrated suspension systems and TRLAXLE®
non-integrated axles described below comply with the current revision of DOT 49 CFR 571.121 and Canadian Motor Vehicle Safety
Standards, Service Brakes, Paragraph S5.4, and Parking Brakes, Paragraph 5.6.1, when equipped as noted. For certifications other than
those listed below, please contact Hendrickson Brake Engineering for an application specific approval. All tests were performed on
112-pound cast drums. 120-pound heavy duty drums are required for applications greater than 23,000 lbs.
BRAKE MODEL
LINING
BRAKE RATING
HENDRICKSON
16.5" × 7"
Standard
(F.M.S.I. 4515)
H20167SF
17,000 – 20,000
HENDRICKSON
16.5" × 7"
HXS®
(F.M.S.I. 4707)
H23167SF
17,000 – 23,000
H20167XF
17,000 – 20,000
H23167XF
17,000 – 23,000
Hendrickson
ULTRAA20™
17,000 – 20,000
H26167XF
23,000 – 26,000
WHEN USED WITH:
CHAMBER SIZE
SLACK LENGTH
TIRE SLR
30/30
[2.5" stroke]
5.5" or 6.0"3
17" – 20.8"
30/30
[2.5" stroke]
5.5" or 6.0"3
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: L809 Rev S
Replacement Service Bulletin Number:
MFR Communication Date: 2019-03-01
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Communication Type: Service Bulletin/Repair Instructions
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