GAR | GRRF-81-04/Rev.1

GRRF-81-04/Rev.1

Proposal for amendments to ECE/TRANS/WP.29/GRRF/2016/22

Source(s)

CLEPA

Date

5 Feb 2016

Status

Superseded

Subject

UN R90 Replacement Brake Components

Meeting(s)

GRRF | Session 81 | 1-5 Feb 2016

Agenda item 6. Regulation No. 90 (Replacement brake linings)

Revised version of the proposal to remove tables specifying general values for replacement discs and drums that are identical to the original (2.3.3.4), taking into account comments received during the February 2016 GRRF session. The tables are considered superfluous since replacement parts identical to the original parts must by definition have values identical to the corresponding original parts. This proposal also would change the maximum permitted thickness variation of discs for medium and heavy vehicles from 0.030 mm to 0.040 mm (the common OEM specification). This has been changed from the previous proposal of 0.050 mm. This revised proposal clarifies that the proposal would revise the specifications for vehicles of categories M3, N3, O3 and O4 but retain the maximum permitted specification of 0.030mm for vehicles of categories M2 and N2.

Downloads

UNECE server

Related documents

Excerpts from session reports

GRRF | Session 81 | 1-5 Feb 2016

25. The expert from CLEPA presented ECE/TRANS/WP.29/2016/22 based on GRRF-80-12 proposing amendments to provisions defined for equivalent brake discs and drums and a relaxation of the requirement on the thickness variation for interchangeable replacement discs or drums. The expert presented a revised proposal GRRF-81-04 limiting the thickness variation requirement modification to vehicles of category O2, O3, N3 and M3. The expert from Italy expressed his concern with the proposed requirement relaxation. After discussion, GRRF agreed on the revised document GRRF-81-04-Rev.1. GRRF adopted the proposal amended by Annex IV to the report and requested the secretariat to submit it to WP.29 and AC.1 for consideration at their June 2016 sessions, as Supplement 3 to the 02 series of amendments to Regulation No. 90.

GRRF | Session 86 | 12-16 Feb 2018

25. The expert from CLEPA introduced GRRF-86-40 proposing to amend ECE/TRANS/WP.29/2016/58, which was prepared on the basis of three documents with conflicting provisions. The secretariat informed GRRF that ECE/TRANS/WP.29/2016/58 was adopted by AC.1 as Supplement 3 to UN Regulation No. 90 and that the corrections proposed could not be adopted as drafted. The secretariat agreed to prepare a revised version that could potentially be adopted (GRRF-86-40-Rev.1) by AC.1 as a Supplement 4.

GRVA | Session 1 | 25-28 Sep 2018

56. Due to the lack of time, GRVA agreed to postpone the consideration of
GRVA-01-12 and the oral report of the expert from Spain on the activities of the Special Interest Group of experts on UN Regulation No. 90 until the January 2019 session.

GRVA | Session 2 | 28 Jan-1 Feb 2019

59. The expert from CLEPA introduced GRVA-01-12 with minor amendment proposals to UN Regulation No. 90, addressing the concern expressed in GRRF-86-40. The expert from France proposed that the amendment to the table in para. 5.3.4.1.1 should also include the vehicles of category L₆ and L₇ (in alignment with the vehicles of category M1 and N1). The experts from Spain and from CLEPA supported the proposed alignment of L₆ and L₇ values with the existing values for M1 and N1. The expert from CLEPA agreed to prepare a revised proposal for review at the September 2019 session.