Regulation No. 90-01

Name:Regulation No. 90-01
Description:Replacement Brake Lining Assemblies.
Official Title:Uniform Provisions Concerning the Approval of: Replacement Brake Lining Assemblies and Drum Brake Linings for Power-driven Vehicles and their Trailers.
Country:ECE - United Nations
Date of Issue:1993-03-31
Amendment Level:01 Series, Corrigendum 1, Revision 2
Number of Pages:43
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle, Trailer
Subject Categories:Prior Versions
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Keywords:

brake, lining, replacement, test, drum, approval, assembly, regulation, type, vehicle, assemblies, pressure, annex, paragraph, original, temperature, linings, speed, force, requirements, axle, vehicles, initial, line, application, fully, kpa, applications, performance, snub, developed, brakes, number, tests, braking, deceleration, means, friction, recorded, categories, approved, procedure, date, make, torque, service, amendments, production, results, shoe

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.89/Rev.2/Corr.1
October 27, 2010
STATUS OF UNITED NATIONS REGULATION
ECE 90-01
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
REPLACEMENT BRAKE LINING ASSEMBLIES AND DRUM
BRAKE LININGS FOR POWER-DRIVEN VEHICLES AND THEIR TRAILERS
Incorporating:
Supplement 3 to the 01 series of amendments
Date of Entry into Force: 13.11.99
Supplement 4 to the 01 series of amendments
Date of Entry into Force: 29.12.00
Supplement 5 to the 01 series of amendments
Date of Entry into Force: 07.12.02
Supplement 6 to the 01 series of amendments
Date of Entry into Force: 09.11.05
Supplement 7 to the 01 series of amendments
Date of Entry into Force: 18.01.06
Supplement 8 to the 01 series of amendments
Date of Entry into Force: 02.02.07
Supplement 9 to the 01 series of amendments
Date of Entry into Force: 10.11.07
Corr. 1 of 08.04.08 to Revision 1
Date of Entry into Force: 12.03.08
Supplement 10 to the 01 series of amendments
Date of Entry into Force: 15.10.08
Corr. 1 to Revision 2 of the Regulation
Dated: 30.07.10
Supplement 11 to the 01 series of amendments
Date of Entry into Force: 24.10.09

REGULATION No. 90
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF REPLACEMENT BRAKE
LINING ASSEMBLIES AND DRUM BRAKE LININGS FOR POWER-DRIVEN VEHICLES
AND THEIR TRAILERS
CONTENTS
REGULATION
1.
Scope
2.
Definitions
3.
Application for approval
4.
Approval
5.
Specifications and tests
6.
Packaging and marking
7.
Modifications and extension of approval of the replacement brake lining assembly or the
replacement drum brake lining
8.
Conformity of production
9.
Penalties for non-conformity of production
10.
Production definitely discontinued
11.
Names and addresses of Technical Services responsible for conducting approval tests, and of
Administrative Departments
12.
Transitional provisions
ANNEXES
Annex 1:
Annex 2:
Annex 3:
Annex 4:
Annex 5:
Annex 6:
Communication concerning the approval or extension or refusal or withdrawal of approval or
production definitely discontinued of a replacement brake lining assembly or replacement
drum brake lining pursuant to Regulation No. 90
Arrangements of the approval mark and approval data
Requirements for replacement brake lining assemblies for vehicles of Categories M , M
and N
Requirements for replacement brake lining assemblies and drum brake linings for vehicles
of Categories M , N and N
Requirements for replacement brake lining assemblies for vehicles of Categories O and O
Requirements for replacement brake lining assemblies and drum brake linings for vehicles
of Categories O and O
Annex 7: Requirements for replacement brake lining assemblies for vehicles of Category L.
Annex 8:
Annex 9:
Technical prescriptions for replacement brake linings assemblies intended for the use in
separate parking brake systems being independent of the vehicle service brake system
Determination of friction behaviour by machine testing

2.3.3. "Brake lining" means the friction material component with the shape and final dimension to
be fixed on to the shoe or backplate;
2.3.4. "Drum brake lining" means a brake lining for a drum brake.
2.3.5. "Friction material" means the product of a specified mixture of materials and processes
which together determine the characteristics of a brake lining;
2.4. "Brake lining type" means a category of brake linings which do not differ in friction material
characteristics;
2.5. "Brake lining assembly type" means wheel sets of brake lining assemblies which do not
differ in brake lining type, dimension or functional characteristics;
2.6. "Drum brake lining type" means wheel sets of brake lining components which after fitment
to the shoes do not differ in brake lining type, dimensions or functional characteristics.
2.7. "Original brake lining" means a brake lining type referenced in the vehicle type approval
documentation, Regulation No. 13, Annex 2, Paragraph 8.1.1., Regulation No. 13-H, Annex 1,
Paragraph 7.1. or Regulation No. 78, Annex 1, Paragraph 5.4.;
2.8. "Original brake lining assembly" means a brake lining assembly conforming to the data
attached to a vehicle type approval documentation;
2.9. "Replacement brake lining assembly" means a brake lining assembly of a type approved
under this Regulation as a suitable service replacement for an original brake lining assembly;
2.10. "Original drum brake lining" means a drum brake lining conforming to the data attached to
a vehicle type approval documentation.
2.11. "Replacement drum brake lining" means a drum brake lining of a type approved under this
Regulation as a suitable service replacement when fitted to a shoe for an original drum brake
lining.
2.12. "Parking brake lining assembly" means a pad assembly or shoe assembly belonging to a
parking brake system separate and independent from the service brake system.
2.13. "Manufacturer" means the organisation which can assume technical responsibility for the
brake lining assemblies or drum brake linings and can demonstrate that it possesses the
necessary means to achieve conformity of production.
3. APPLICATION FOR APPROVAL
3.1. An application for approval of a replacement brake lining assembly type or a replacement
drum brake lining type for (a) specific vehicle type(s) shall be submitted by the manufacturer
of the replacement lining assembly/replacement drum brake lining or his duly accredited
representative.

4.4. Notice of approval or of extension or refusal of approval or withdrawal of approval or
production definitely discontinued of a brake lining assembly type or drum brake lining type
pursuant to this Regulation shall be communicated to the Parties to the 1958 Agreement
which apply this Regulation by means of a form conforming to the model in Annex 1 to this
Regulation.
4.5. There shall be affixed, conspicuously and in a readily accessible place, to every brake lining
assembly or drum brake lining of a type approved under this Regulation: an international
approval mark consisting of:
4.5.1. a circle surrounding the Letter "E" followed by the distinguishing number of the country which
granted the approval;
4.5.2. the number of this Regulation, followed by the Letter "R", a dash and the approval number to
the right of the circle prescribed in Paragraph 4.5.1.
4.6. The approval mark referred to in Paragraph 4.5. above shall be clearly legible and be
indelible.
4.7. Annex 2 to this Regulation gives examples of arrangements of the approval mark and
approval data referred to above and in Paragraph 6.5. below.
5. SPECIFICATIONS AND TESTS
5.1. General
A replacement brake lining assembly or a replacement drum brake lining shall be so designed
and constructed that, when substituted for the assembly or lining originally fitted to a vehicle,
the braking efficiency of that vehicle accords with that of the approved vehicle type.
Specifically:
(a)
(b)
a vehicle equipped with replacement brake lining assemblies or replacement drum
brake linings shall satisfy the relevant braking prescriptions of Regulation No. 13, or
Regulation No. 13-H, or Regulation No. 78;
a replacement brake lining assembly or a replacement drum brake lining shall display
performance characteristics similar to that of the original brake lining assembly or
original drum brake lining it is intended to replace;

5.2.4. Replacement brake lining assemblies and replacement drum brake linings for vehicles of
Categories O and O .
Replacement brake lining assemblies and replacement drum brake linings shall be tested
according to the prescriptions of Annex 6 and shall satisfy the requirements stated in this
Annex. For the tests, one of the three methods described in Paragraph 3 of Appendix 2 to
Annex 11 of Regulation No. 13 shall be used.
5.2.5. Replacement brake lining assemblies for vehicles of Category L.
At least one set of replacement brake lining assemblies, representing the type of lining to be
approved, shall be installed and tested in at least one vehicle which is representative of the
vehicle type for which approval is sought, according to the prescriptions of Annex 7 and shall
satisfy the requirements stated in this Annex. The representative vehicle(s) shall be selected
from among the application range using a worst case analysis .
5.3. Mechanical Characteristics
5.3.1. Replacement brake lining assemblies for vehicles of Categories M , M , N , O , O , and L.
5.3.1.1. Replacement brake lining assemblies of the type for which approval is requested shall be
tested for shear strength according to Standard either ISO 6312:1981 or ISO 6312:2001.
The minimum acceptable shear strength is 250 N/cm for pad assemblies and 100 N/cm for
shoe assemblies.
5.3.1.2. Replacement brake lining assemblies of the type for which approval is requested shall be
tested for compressibility according to Standard either ISO 6310:1981, ISO 6310:2001 or
ISO 6310:2009.
The compressibility values shall not exceed 2% at ambient temperature and 5% at 400° C for
pad assemblies and 2% at ambient temperature and 4% at 200° C for shoe assemblies. This
requirement does not apply to parking brake lining assemblies.
5.3.2. Replacement brake lining assemblies and replacement drum brake linings for vehicles of
Categories M , N , N , O , and O .
5.3.2.1. Shear Strength
This test applies only to disc brake pad assemblies.
Replacement brake lining assemblies of the type for which approval is requested shall be
tested for shear strength according to Standard ISO 6312:1981 or ISO 6312:2001. Brake
lining assemblies may be divided into two or three parts to match the test machine's
capability.
The minimum acceptable shear strength is 250 N/cm .

6.4.3. with, in the case of replacement drum brake linings, a general statement calling attention to
the following points:
the integrity of the shoe platform, abutment and pivot;
freedom of the shoe from distortion, deformation and corrosion;
the type and size of rivet to be used;
the required riveting tools and forces.
6.4.4. with, additionally, in the case of combined braking systems in the meaning of Paragraph 2.9.
of Regulation No. 78 giving the approved brake lining assembly combination(s).
6.5. Each replacement brake lining assembly or replacement drum brake lining shall display
permanently one set of approval data:
6.5.1. the approval mark;
6.5.2. the date of manufacture, at least month and year, or batch number;
6.5.3. make and type of brake lining.
7. MODIFICATIONS AND EXTENSION OF APPROVAL OF THE REPLACEMENT BRAKE
LINING ASSEMBLY OR THE REPLACEMENT DRUM BRAKE LINING
7.1. Every modification of the replacement brake lining assembly type or replacement drum brake
lining type shall be notified to the administrative department which granted the type
approval. The department may then either:
7.1.1. consider that the modifications made are unlikely to have appreciable adverse effects and
that in any event the brake lining assembly or drum brake lining still complies with the
requirements; or
7.1.2. require a further test report from the technical service responsible for conducting the tests.
7.2. Confirmation or refusal of approval, specifying the alterations, shall be notified by the
procedure specified in Paragraph 4.4. above to the Parties to the 1958 Agreement applying
this Regulation.
7.3. The Competent Authority issuing the extension of approval shall assign a series number for
such an extension and inform thereof the other Parties to the 1958 Agreement applying this
Regulation by means of a communication form conforming to the model in Annex 1 to this
Regulation.
8. CONFORMITY OF PRODUCTION
8.1. Replacement brake lining assemblies or replacement drum brake linings approved to this
Regulation shall be so manufactured as to conform to the type approved.
8.2. Original brake lining assemblies or original drum brake linings being the subject of an
application under Paragraph 3.2. are deemed to satisfy the requirements of Paragraph 8.

9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of a replacement brake lining assembly type or drum brake
lining type pursuant to this Regulation may be withdrawn if the requirements laid down in
Paragraph 8.1. above are not complied with,
9.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it has
previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation, by means of a communication form conforming to the model in Annex 1 to this
Regulation.
10. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a replacement brake lining
assembly type or drum brake lining type approved in accordance with this Regulation, he
shall so inform the authority which granted the approval. Upon receiving the relevant
communication that authority shall inform thereof the other Parties to the 1958 Agreement
applying this Regulation by means of a communication form conforming to the model in
Annex 1 to this Regulation.
11. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Contracting Parties to the 1958 Agreement which apply this Regulation shall
communicate to the United Nations secretariat the names and addresses of the Technical
Services responsible for conducting approval tests and of the Administrative Departments
which grant approval and to which forms certifying approval or extension or refusal or
withdrawal of approval, or production definitely discontinued, issued in other countries, are to
be sent.
12. TRANSITIONAL PROVISIONS
12.1. No Contracting Party shall refuse to grant approvals under this Regulation as amended by the
01 series of amendments.
12.2. As from January 1, 1995 Contracting Parties applying this Regulation shall grant approvals
only if the replacement brake lining assembly or the replacement drum brake lining approved
meets the requirements of this Regulation as amended by the 01 series of amendments.
12.3. Contracting Parties applying this Regulation shall continue to allow fitting or use on a vehicle
in use of a replacement brake lining assembly approved to this Regulation in its original,
unamended form.

8. Technical Service responsible for approval tests.................................................................................
8.1 Date of test report.................................................................................................................................
8.2 Number of test report ...........................................................................................................................
9. Approval granted/extended/refused/withdrawn ................................................................................
10. Place.....................................................................................................................................................
11. Date......................................................................................................................................................
12. Signature ..............................................................................................................................................
13. Annexed to this communication is a list of documents in the approval file deposited at the
administrative services having delivered the approval and which can be obtained upon request.

Example of drum brake lining marking
Make and type of brake lining
Date of manufacture
Approval mark
Note: Positions of markings and mutual positions of markings shown in the examples are not
mandatory.

1.1.2.3. Performance Check
By braking only one axle at a time perform 5 brake applications from 70 km/h to 0 km/h (front
axle) and 45 km/h to 0 km/h (rear axle) at a line pressure of 4 Mpa and with an initial
temperature of 100° C for each stop. The 5 consecutive non-monotonic results must remain
within the tolerance of 0.6 m/s (front axle) or 0.4 m/s (rear axle) of their mean fully
developed deceleration.
If this requirement is not fulfilled the bedding procedure according to Paragraph 1.1.2.2 must
be extended and the performance check according to Paragraph 1.1.2.3 must be repeated.
1.2. The braking system of the vehicle shall be tested according to the requirements for the
vehicle category in question (M , M or N ) in Regulation No. 13, Annex 4, Paragraphs 1 and
2. or Regulation No. 13-H, Annex 3, Paragraphs 1 and 2 whichever is appropriate taking into
consideration the original approval of the system The applicable requirements or tests are:
1.2.1. Service Braking System
1.2.1.1. Type-O test with engine disconnected, vehicle laden, according to Regulation No. 13,
Annex 4, Paragraph 1.4.2. or Regulation No. 13-H, Annex 3, Paragraph 1.4.2.
1.2.1.2. Type-O test with engine connected, vehicle unladen and laden, according to
Regulation No. 13, Annex 4, Paragraphs 1.4.3.1. (stability test) and 1.4.3.2. (only the test with
initial speed v = 0.8 v )or Regulation No. 13-H, Annex 3, Paragraphs 1.4.3.1. and 1.4.3.2.
1.2.1.3. Type-I Test, according to Regulation No. 13, Annex 4, Paragraph 1.5. or Regulation No. 13-H,
Annex 3, Paragraph 1.5.
1.2.2. Secondary Braking System
1.2.2.1. Type-O test with engine disconnected, vehicle laden, according to Regulation No. 13,
Annex 4, Paragraph 2.2. or Regulation No. 13-H, Annex 3, Paragraph 2.2. (this test may be
omitted in cases where it is obvious that the requirements are met, e.g. diagonal split braking
system)
1.2.3. Parking Braking System
(Only applicable if the brakes for which lining approval is sought are used for parking).
1.2.3.1. Parking brake test at 18% gradient, vehicle laden, according to Regulation No. 13, Annex 4,
Paragraph 2.3.1. or parking brake test at 20% gradient, vehicle laden, Regulation No. 13-H,
Annex 3, Paragraph 2.3.1.
1.3. The vehicle must satisfy all the relevant requirements stated in Regulation No. 13, Annex 4,
Paragraph 2 or Regulation No. 13-H, Annex 3, Paragraph 2 for that category of vehicle.

2.1.2. Speed Sensitivity Test
2.1.2.1. Using the pedal force derived from Paragraph 2.1.1.2. of this Annex and with initial brake
temperature ≤ 100° C, make three brake applications from each of the following speeds:
(a) Front axle 65, 100 km/h and additionally 135 km/h where v exceeds 150 km/h.
(b) Rear axle 45, 65 km/h and additionally 90 km/h where v exceeds 150 km/h.
2.1.2.2. Average the results for each group of three applications and plot speed against corresponding
mean fully developed deceleration.
2.1.2.3. Mean fully developed decelerations recorded for the higher speeds shall lie within 15% of that
recorded for the lowest speed.
2.2. Inertia Dynamometer Test
2.2.1. Test Equipment
For the tests an inertia dynamometer shall be equipped with the vehicle brake in
question. The dynamometer shall be instrumented for continuous recording of rotational
speed, brake torque, pressure in the brake line, number of rotations after brake application,
braking time and brake rotor temperature.
2.2.2. Test Conditions
2.2.2.1. The rotational mass of the dynamometer shall correspond to half the axle portion of the
maximum vehicle mass as listed in the table below and to the rolling radius of the largest tyre
that is authorised for that vehicle type(s).
Vehicle Category
Axle portion of maximum vehicle mass
front
rear
M 0.77 0.32
M 0.69 0.44
N 0.66 0.39
2.2.2.2. The initial dynamometer rotational speed shall correspond to the linear vehicle speed as
stated in Paragraphs 2.2.3. and 2.2.4. of this Annex and shall be based on the dynamic rolling
radius of the tyre.

Parameter
Front axle
Rear axle
Disc brake
Rear axle
Drum brake
Pressure snub 24 (kPa) 4 600 4 600 4 600
Pressure snub 25 (kPa) 2 600 2 600 2 600
Pressure snub 26 (kPa) 1 500 1 500 1 500
Pressure snub 27 (kPa) 3 400 3 400 3 400
Pressure snub 28 (kPa) 2 200 2 200 2 200
Pressure snub 29 (kPa) 1 800 1 800 1 800
Pressure snub 30 (kPa) 3 000 3 000 3 000
Pressure snub 31 (kPa) 1 800 1 800 1 800
Pressure snub 32 (kPa) 3 800 3 800 3 800
Number of cycles 2 2 2
Burnishing Phase 2, 10 stops from 100 km/h to 5 km/h at 0.4 g deceleration and increasing
initial temperatures:
Parameter
Front axle
Rear axle
Disc brake
Rear axle
Drum brake
Number of stops per cycle 10 10 10
Brake speed (km/h) 100 100 100
Release speed (km/h) < 5 < 5 < 5
Deceleration level (g) 0.4 0.4 0.4
Maximum pressure (kPa) 16 000 16 000 10 000
Initial temperature 1 (°C) < 100 < 100 < 100
Initial temperature 2 (°C) < 215 < 215 < 151
Initial temperature 3 (°C) < 283 < 283 < 181
Initial temperature 4 (°C) < 330 < 330 < 202
Initial temperature 5 (°C) < 367 < 367 < 219
Initial temperature 6 (°C) < 398 < 398 < 232
Initial temperature 7 (°C) < 423 < 423 < 244
Initial temperature 8 (°C) < 446 < 446 < 254
Initial temperature 9 (°C) < 465 < 465 < 262
Initial temperature 10 (°C) < 483 < 483 < 270
Number of cycles 1 1 1

2.2.4. Speed Sensitivity Test
2.2.4.1. Using the line pressure derived from Paragraph 2.2.3.2. and with initial brake temperature
≤ 100° C make three brake applications from rotational speeds corresponding to vehicle linear
speeds of:
(a) 75, 120 km/h and additionally 160 km/h where v exceeds 150 km/h
2.2.4.2. Average the results for each group of three applications and plot speed against corresponding
mean fully developed deceleration.
2.2.4.3. Mean fully developed decelerations recorded for the higher speeds shall lie within 15% of that
recorded for the lowest speed.

1.2.1.2. The vehicle must satisfy all relevant requirements stated in Regulation No. 13, Annex 4,
Paragraph 2 for that category of vehicle.
1.2.2. Additional Requirements (Split Axle Test)
For the tests mentioned below the vehicle shall be fully laden and all brake applications
made with engine disconnected, on a level road.
The vehicle service brake control system shall be equipped with a means of isolating front
and rear axle brakes so that either may be used independently of the other.
Where brake lining assembly approval or drum brake lining approval is required for front
axle brakes the rear axle brakes shall remain inoperative throughout the test.
Where brake lining assembly approval or drum brake lining approval is required for rear
axle brakes the front axle brakes shall remain inoperative throughout the test.
1.2.2.1. Cold Performance Equivalence Test
A comparison of the cold performance of the replacement brake lining assembly or the
replacement drum brake lining and the original brake lining assembly or the original drum
brake lining shall be made by comparing the results of testing to the following method.
1.2.2.1.1. Make a minimum of six brake applications at spaced increments of pedal force or line
pressure up to wheel lock or, alternatively, up to a mean fully developed deceleration of
3.5 m/s or up to the maximum allowed pedal force or up to the maximum line pressure
from an initial speed of 45 km/h and with a brake temperature ≤ 100° C at the start of each
application.
1.2.2.1.2. Note and plot pedal force or line pressure and mean fully developed deceleration for each
application, and determine the pedal force or line pressure required to achieve (if possible)
a mean fully developed deceleration of 3 m/s . If this value cannot be achieved determine
alternatively the pedal force or line pressure required to achieve maximum deceleration.
1.2.2.1.3. The replacement brake lining assembly or the replacement drum brake lining shall be
considered to show similar performance characteristics to the original brake lining
assembly or the original drum brake lining if the achieved mean fully developed
decelerations at the same control force or line pressure in the upper two thirds of the
generated curve are within 15% of those obtained with the original brake lining assembly
or the original drum brake lining.
1.2.2.2. Speed Sensitivity Test
1.2.2.2.1. Using the pedal force derived from Paragraph 1.2.2.1.2. of this Annex and with initial brake
temperature ≤ 100° C, make three brake applications from each of the following speeds:
40 km/h down to 20 km/h,
60 km/h down to 40 km/h and
80 km/h down to 60 km/h (if v ≥ 90 km/h)

2.2.1.2. Type-O Test, High Speed Performance
2.2.1.3. Type-I Test
Make three brake applications with a brake temperature of ≤ 100° C at the start of each
application from a speed of 100 km/h where approval is directed to vehicles of
Category N and 90 km/h where approval is directed to vehicles of Categories M and N
using the guaranteed line pressure as defined in Paragraph 2.2.1.1. The mean value of
the achieved mean fully developed decelerations of the three applications must be at least
4 m/s .
2.2.1.3.1. Heating Procedure
Make 20 consecutive snub applications with v = 60 km/h and v = 30 km/h with a cycle
time of 60 s starting at a brake temperature of ≤ 100° C at the first application. The line
pressure shall correspond to a deceleration of 3 m/s at the first application and must
remain constant throughout the succeeding applications.
2.2.1.3.2. Hot Performance
2.2.1.3.3. Recovery
2.2.1.4. Type-II Test
On completion of the heating procedure the hot performance shall be measured under the
conditions of Paragraph 2.2.1.1. above using the guaranteed line pressure as defined in
Paragraph 2.2.1.1. (the temperature conditions may be different). The mean fully
developed deceleration with the heated brake must not be less than 60% of the value
achieved with the cold brake or 4 m/s .
Starting 120 s after the hot performance brake application make 5 full stops with the line
pressure used in Paragraph 2.2.1.3.1. above and with intervals of at least 2 minutes from
the initial speed of 60 km/h. At the beginning of the fifth application the brake temperature
shall be ≤ 100° C and the mean fully developed deceleration achieved shall be within 10%
of that calculated from the relation line pressure/deceleration of the Type-O test at
60 km/h.
2.2.1.4.1. Heating Procedure
The brakes shall be heated by constant braking torque corresponding to a deceleration of
0.15 m/s at a constant speed of 30 km/h during a period of 12 minutes.
2.2.1.4.2. Hot Performance
On completion of the heating procedure the hot performance shall be measured under the
conditions of Paragraph 2.2.1.1. above using the guaranteed line pressure as defined in
Paragraph 2.2.1.1. (the temperature conditions may be different). The mean fully
developed deceleration with the heated brake must not be less than 3.75 m/s .
2.2.1.5. Static Test for Parking Performance
2.2.1.5.1. For the whole range of applications determine the worst case regarding input force to the
brake, maximum vehicle mass to be braked by one axle, and tyre radius.

ANNEX 5
REQUIREMENTS FOR REPLACEMENT BRAKE LINING ASSEMBLIES
FOR VEHICLES OF CATEGORIES O AND O
1. GENERAL
The test method described in this Annex is based on an inertia dynamometer
test. Alternatively the tests may be carried out on a test vehicle or on a rolling road test bench
provided that the same test conditions are achieved and the same parameters measured as
in the inertia dynamometer test.
2. TEST EQUIPMENT
For the tests an inertia dynamometer shall be equipped with the vehicle brake in
question. The dynamometer shall be instrumented for continuous recording of rotational
speed, brake torque, pressure in the brake line or actuation force, number of rotations after
brake application, braking time and brake rotor temperature.
2.1. Test Conditions
2.1.1. The rotational mass of the dynamometer shall correspond to half the relevant axle portion of
the maximum vehicle mass and the rolling radius of the largest tyre that is authorised for that
vehicle type(s).
2.1.2. The initial dynamometer rotational speed shall correspond to the linear vehicle speed as
stated in Paragraph 3.1. of this Annex and shall be based on the dynamic rolling radius of the
smallest tyre that is authorised for that vehicle type(s).
2.1.3. Brake linings submitted for the test shall be fitted to the relevant brake and, until a fixed
burnishing procedure is established, shall be burnished to the manufacturer's instructions in
agreement with the technical service.
2.1.4. If cooling air is used, the speed of the airflow at the brake shall be:
where:
v = 0.33v
v = vehicle test speed at initiation of braking.
2.1.5. The actuation device fitted to the brake must correspond to the vehicle installation.
3. TESTS AND REQUIREMENTS
3.1. Type-O Test
From the initial speed of 60 km/h with a brake temperature ≤ 100° C at the start of each
application make a minimum of six consecutive brake applications at spaced intervals of line
pressure or application force up to the maximum line pressure or up to 6 m/s
deceleration. Repeat the last brake application using an initial speed of 40 km/h.

ANNEX 6
REQUIREMENTS FOR REPLACEMENT BRAKE LINING ASSEMBLIES AND DRUM
BRAKE LININGS FOR VEHICLES OF CATEGORIES O AND O
1. TEST CONDITIONS
The tests prescribed in this Annex may be carried out alternatively on a test vehicle or on an
inertia dynamometer or on a rolling road test bench under the same conditions as mentioned
in Regulation 13, Annex 11, Appendix 2, Paragraphs 3.1. to 3.4.
Brake linings submitted for test shall be fitted to the relevant brakes and, until a fixed
burnishing procedure is established, shall be burnished to the manufacturer's instructions in
agreement with the technical service.
2. TESTS AND REQUIREMENTS
2.1. Conformance with Regulation No. 13, Annex 11
The brakes shall be tested according to the requirements of Regulation No. 13, Annex 11,
Appendix 2, Paragraph 3.5.
2.1.1. The results shall be reported in a form according to Regulation No. 13, Annex 11, Appendix 3.
2.1.2. A comparison shall be made between these results and those obtained with the original brake
lining assemblies or the original drum brake linings under the same conditions.
2.1.3. The achieved hot performance at the same input torque of the replacement brake lining
assembly or the replacement drum brake lining in the Type-I test or in the Type-III test
(whichever is applicable) must be:
(a)
(b)
equal to or higher than the hot performance of the original brake lining assembly or the
original drum brake lining, or
at least 90% of the cold performance of the replacement brake lining assembly or the
replacement drum brake lining.
The corresponding stroke of the actuator must not be ≥ 110% of the value achieved with the
original brake lining assembly or the original drum brake lining and must not exceed the value
s as defined in Annex 11, Appendix 2, Paragraph 2 of Regulation No. 13. In the case where
the original brake lining assembly or drum brake lining has been tested against the Type-II
test requirements, the minimum requirements of Regulation No. 13, Annex 4,
Paragraph 1.7.2. (Type-III test) are applicable for the replacement brake lining assembly or
drum brake lining.
2.2. Cold Performance Equivalence Test (Type-O)
2.2.1. Under the conditions of Paragraph 1 of this Annex and from an initial speed of 60 km/h with a
brake temperature ≤ 100° C make 6 brake applications at spaced intervals of control force or
line pressure up to 6.5 bar or an achieved deceleration of 6 m/s .
2.2.2. Note and plot control force or line pressure and mean brake torque or mean fully developed
deceleration for each application.

ANNEX 7
REQUIREMENTS FOR REPLACEMENT BRAKE LINING ASSEMBLIES
FOR VEHICLES OF CATEGORY L
1. TEST CONDITIONS
1.1. A vehicle which is representative of the type(s) for which the replacement brake lining
assembly approval is required shall be equipped with the brake lining assemblies of the type
for which approval is requested and instrumented for brake testing as required by
Regulation No. 78.
1.2. Brake lining assemblies submitted for the test shall be fitted to the relevant brakes and, until a
fixed burnishing procedure is established, shall be burnished to the manufacturer's
instructions in agreement with the technical service.
1.3. In the case of brake lining assemblies for vehicles with a combined braking system in the
meaning of Paragraph 2.9. of Regulation No. 78 the combination(s) of brake lining assemblies
for the front and the rear axle to which the approval shall be directed must be tested.
The combination may consist of replacement brake lining assemblies for both axles and/or a
replacement brake lining assembly on one and an original brake lining assembly on the other
axle.
2. TESTS AND REQUIREMENTS
2.1. Conformance with Regulation No. 78
2.1.1. The braking system of the vehicle shall be tested according to the requirements for the
vehicle category in question (L , L , L , L or L ) in Regulation No. 78, Annex 3,
Paragraph 1. The applicable requirements or tests are:
2.1.1.1. Type-O test with engine disconnected
The test is to be carried out only in the laden condition. Make a minimum of six brake
applications at spaced increments of control force or line pressure up to wheel lock, or up to a
deceleration of 6 m/s or up to the maximum allowed control force.
2.1.1.2. Type-O Test with Engine Connected
Only applicable for vehicles of Categories L , L and L .
2.1.1.3. Type-O Test with Wet Brakes
Not applicable to vehicles of Category L or in cases of drum brakes or fully enclosed disc
brakes not subjected to this test during approval to Regulation No. 78.
2.1.1.4. Type-I Test
Only applicable for vehicles of Categories L , L and L .
2.1.2. The vehicle must satisfy all the relevant requirements stated in Regulation No. 78, Annex 3,
Paragraph 2 for that category of vehicles.

ANNEX 8
TECHNICAL PRESCRIPTIONS FOR REPLACEMENT BRAKE LINING ASSEMBLIES
INTENDED FOR THE USE IN SEPARATE PARKING BRAKE SYSTEMS BEING
INDEPENDENT OF THE VEHICLE SERVICE BRAKE SYSTEM
1. COMPLIANCE WITH REGULATION NO. 13 OR 13-H
Compliance with the requirements of Regulation No. 13 or 13-H shall be demonstrated in a
vehicle test.
1.1. Vehicle Test
A vehicle which is representative of the type(s) for which the replacement brake lining
assembly approval is required shall be equipped with the replacement brake lining
assemblies of the type for which approval is requested and instrumented for brake testing as
required by Regulation No. 13 or Regulation No. 13-H whichever is appropriate. The vehicle
shall be fully laden. Brake linings submitted for test shall be fitted to the relevant brakes and,
shall not be burnished.
1.2. The parking brake system of the vehicle shall be tested according to all relevant requirements
in Regulation No. 13, Annex 4, Paragraph 2.3. or Regulation No. 13-H, Annex 3,
Paragraph 2.3., whichever is appropriate taking into consideration the original approval of the
system.

2.2.2.1. Test Schedule with Constant Pressure
2.2.2.1.1. Pad Assemblies
The hydraulic pressure p under the piston(s) of the calliper shall be constant following the
formula:
M
p =
0.57 ⋅ r
⋅ A
M
=
150 Nm for A ≤ 18.1 cm
M
=
300 Nm for A > 18.1 cm
A
=
area of calliper piston(s)
r
=
effective radius of disc
No of
cycle
Number of brake
applications
X
Initial brake rotor
temperature
(°C)
Max. brake rotor
temperature
(°C)
Forced
cooling
1
2-6
7
1 × 10
5 × 10
1 × 10
≤ 60
100
100
open
open (350)
open
no
no
yes
2.2.2.1.2. Shoe Assemblies
The mean contact pressure at the brake lining working surface shall be constant at
22 ± 6 N/cm calculated for a static brake without self-energising.
No of
cycle
Number of brake
applications
X
Initial brake rotor
temperature
(°C)
Max. brake rotor
temperature
(°C)
Forced
cooling
1
2
3
4
1 × 10
1 × 10
1 × 10
1 × 10
≤ 60
100
100
100
200
open
200
open
yes
no
yes
no

2.4. Acceptance Criteria
2.4.1. With each application for approval of a brake lining assembly type there shall be submitted:
2.4.1.1. for pad assemblies, values for µ , µ , µ .
2.4.1.2. for shoe assemblies, values for M and M .
2.4.2. During production of an approved brake lining assembly type, test samples must demonstrate
compliance with the values registered under Paragraph 2.4.1. of this Annex with the following
tolerances:
2.4.2.1. for disc brake pads
µ ± 15% of registered value
µ ≥ registered value
µ ≤ registered value
2.4.2.2. for simplex drum brake linings:
M ± 20% of registered value
M ≥ registered value.
3. BRAKE LINING ASSEMBLIES AND DRUM BRAKE LININGS FOR VEHICLES OF
CATEGORIES M , N , N , O , AND O
3.1. Equipment
3.1.1. The machine shall be equipped with a disc brake of the fixed calliper type with a cylinder
diameter of 60 mm and a solid (not ventilated) disc having a diameter of 278 ± 2 mm and a
thickness of 12 mm ± 0.5 mm. A rectangular piece of the friction material with an area of
44 cm ± 0.5 cm and a thickness of at least 6 mm shall be attached to the backing plate.
3.1.2. The disc rotational speed shall be 660 ± 10 1/min without load and shall not fall below
600 1/min on full load.
3.1.3. The mean contact pressure at the brake lining working surface shall be constant at
75 N/cm ± 10 N/cm .
3.1.4. The test cycles and brake applications during the cycles to be adjustable and automatic.
3.1.5. Output torque and working surface temperature shall be recorded.
3.1.6. Provisions shall be made to direct cooling air across the brake at a rate of 600 ± 60 m /h.

3.4. Acceptance Criteria
3.4.1. With each application for approval of a replacement brake lining assembly type or a
replacement drum brake lining type, there shall be submitted values for μ , μ , μ and
μ .
3.4.2. During production of an approved replacement brake lining assembly type or replacement
drum brake lining type, test samples must demonstrate compliance with the values registered
under Paragraph 3.4.1. of this Annex within the following tolerances:
μ , μ ± 15% of the registered value
μ ≥ registered value
μ ≤ registered value.
Replacement Brake Lining Assemblies.