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This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format. This document, together with a companion final rule; technical amendments; response to petitions; published in today's edition of the Federal Register , addresses issues raised in petitions received in response to a December final rule that updated the Federal motor vehicle safety standard on brake hoses, and a related petition for rulemaking.
In that rule, we incorporated updated versions of substantive specifications of several Society of Automotive Engineers SAE Recommended Practices relating to hydraulic brake hoses, vacuum brake hoses, air brake hoses, plastic air brake tubing, and end fittings.
In this NPRM, we respond to some issues raised in the petitions and propose a number of amendments to the brake hose rule in response to the petitions.
In the companion document, we deny several of the petitions and also correct typographical errors in, and inadvertent omissions from, the December 20, final rule. Regardless of how you submit your comments, you should mention the docket number of this document.
You may call the Docket at Docket hours are 9 a. For non-legal issues, Mr. For legal issues, Ms. December 20, Final Rule. Air Brake Hose Dimensions.
Metric Sizes of Air Brake Hoses. High Temperature Resistance. Plastic Air Brake Tubing. Plastic Air Brake Tubing Dimensions. Notations to Table VII.
Resistance to Corrosive Salt Compounds. Resistance to Methyl Alcohol. Rulemaking Analyses and Notices. Regulatory Flexibility Act. National Environmental Policy Act. Executive Order Federalism. Paperwork Reduction Act. National Technology Transfer and Advancement Act. Unfunded Mandates Reform Act. Regulation Identifier Number. Specifically, the petitioners sought incorporation of the requirements in section The petition requested that the application of these SAE specifications be limited to hose, tubing, and fittings used on trucks, truck-trailer combinations, and buses with either a GVWR greater than 10, lbs.
In addition, the petitioners requested that the current versions of the SAE specifications be adopted instead of the older versions cited in the FMCSRs. The agency agreed with the petitioners that there was a safety need to transfer the brake hose, tubing, and fitting requirements currently contained in sections This would involve, among other changes, establishing a new category in the standard for plastic air brake tubing, end fittings, and tubing assemblies.
Revisions over the past 20 years primarily addressed labeling issues, Start Printed Page inclusion of metric-sized brake hoses, updating test fluids to match advances in industry, and minor regulatory revisions to individual test conditions such as the whip test and the adhesion test. We noted that most of the substantive requirements in Standard , other than the labeling requirements, were originally based on SAE standards and American Society for Testing and Materials ASTM standards referenced therein.
The agency's rule differed in the following respects from that petitioned for by the petitioners—. Fourth, the agency did not incorporate SAE standards relating to copper tubing, galvanized steel pipe, or end fittings used with metallic or non-metallic tubing, materials that are occasionally used in chassis plumbing. In July , Arkema, Inc. In a companion document published in today's edition of the Federal Register , we are addressing other issues raised in the petitions and in some instances, are denying the petitions.
In some cases, in this NPRM, we are proposing changes based on suggestions or petitions, but which deviate from the requested changes. Thus, several petitions are partially granted in this respect.
However, as indicated on the SAE website, the compatibility brake fluid is now available for purchase from Greening Associates, Inc. Therefore, we are not proposing to identify the supplier in this notice. We welcome comments on this issue. Overview of Petitions —In response to the agency's final rule, there was one petition received on air brake hose from Parker Hannifin, Hose Products Division.
Parker also petitioned for changes to the high temperature resistance test for air brake hose. All these issues are discussed in further detail below. Gates also petitioned Start Printed Page for a change in the applicability so that Table III applies only to air brake hoses for use with reusable end fittings.
As is addressed in more detail below, in response to the Gates petition, we propose that Table III be revised so that it applies to air brake hoses only for use with reusable end fittings, meaning that there would no longer be a need for the table's footnotes. Therefore, in this notice we are not proposing any changes to the footnotes as requested by Parker. Instead, we are proposing to remove all of the footnotes from Table III.
In particular, Gates asked us to amend S7. The revised wording now places dimensional limits, that were not present in the previous version, on hoses manufactured for use with permanently attached brake hose end fittings only. Gates Corporation manufactures such hoses and this new ruling would exclude Gates Corporation from providing air brake assemblies which it currently supplies under FMVSS These current air brake assemblies meet all the performance requirements of the current version of FMVSS and will continue to meet the performance requirements set forth in the above listed final ruling [referring to FMVSS No.
According to its petition, Gates manufactures Type AIII, an air brake hose used only with permanently attached end fittings. The agency has reviewed Gates' petition and has decided to grant it for the following reasons. We have determined that amending S7.
The agency believes that it may not be as critical to specify dimensions for air brake hoses that are only assembled with permanently attached end fittings, because specialized equipment is needed to produce such brake hose assemblies.
Many of the assemblers doing this work on a repair basis as evidenced by the agency's listing of registered brake hose assemblers are small businesses that purchase or use a complete system of compatible end fittings, brake hoses, and crimping or swaging equipment for a particular brand of brake hoses. Thus the agency believes that it is not likely for an assembler with specialized knowledge and equipment to mix improper components when assembling air brake hoses with permanently attached end fittings, compared to a person making field repairs to an air brake hose with reusable end fittings that do not require specialized equipment to disassemble and reassemble the end fittings.
In contrast, metric measurements are metric units expressed in whole millimeters such as 5 millimeters or 8 millimeters. In order to assure standardization and compatibility of the hose and end fittings and to ensure the safety of replacement brake hoses used with existing end fittings, in this NPRM, the agency proposes, for air brake hoses in metric measurements, to permit air brake hoses with permanently attached end fittings only.
Therefore, the agency does not propose to change the regulatory text in S7. Metric air brake hoses would still be permitted to be assembled and sold with permanently attached end fittings under this proposal. This issue is ambiguous under the regulatory text of the December 20, final rule because metric air brake hoses are referred to in the labeling requirements of S7.
This NPRM seeks to resolve the ambiguity by proposing to specify metric air brake hose for use only with permanently attached end fittings. As explained above, we believe that it may not be as critical to specify dimensions for air brake hoses that are only assembled with permanently-attached end fittings, because specialized equipment is needed to produce such brake hose assemblies.
Therefore, before a manufacturer may manufacture or sell new metric air brake hose for use with reusable end fittings, the metric hose dimensions must first be added to Table III in FMVSS No.
The agency is proposing that language in this notice at S7. NHTSA's proposal, if made final, would eliminate the need for footnotes, since various types of hoses can be included in Table III regardless of whether they are used with reusable or permanently attached end fittings. We therefore propose to remove all footnotes to Table III. With the proposed revision of S7. Public comment is sought on whether the proposed Type AIII designated hoses should be applicable both to hoses with permanently-attached end fittings and to hoses with reusable end fittings.
After this conditioning, the hose is cooled and examined on the inside and outside for cracks, charring, or disintegration. In the final rule, the test cylinder specification was revised to include smaller test cylinders for each size of air brake hose that are specified in SAE J June Parker's comment submitted in response to the final rule stated that SAE J was in the process of being revised to change the dimensions of the test cylinders for the high temperature resistance test, and requested that the agency now consider adopting the new sizes of test cylinders in FMVSS No.
The agency has reviewed the revised standard, SAE J, Automotive Air Brake Hose and Hose Assemblies January , and finds that it includes revisions to the test cylinders for the high temperature test. The sizes of the high temperature test cylinders were increased to be the same size as the test cylinders used for other tests in SAE J, including the low temperature resistance test, ozone resistance test, and the adhesion test for air brake hose reinforced by wire. The stringency of the high temperature resistance test would be reduced slightly, due to larger test cylinders being used, but this would also result in only one size of test cylinders being needed for all of the test requirements for air brake hose in FMVSS No.
The net effect of this proposed change is that the test cylinder dimensions for the high temperature resistance test would be changed back to their original values prior to the agency's extensive recent rulemaking on brake hoses that were in effect for many years. The agency stated that it was not aware of SAE or other industry standards for plastic vacuum tubing, but that if a suitable industry standard were developed, we would consider adopting performance requirements from that standard into FMVSS No.
Degussa stated that there are no industry standards for plastic vacuum brake tubing and believes that it is not feasible to create a complete separate set of requirements for plastic vacuum brake tubing within FMVSS No. However, it and other petitioners submitted two proposed changes specific to plastic vacuum brake tubing that could be incorporated within the S9 and S10 requirements for vacuum brake tubing in FMVSS No.
Federal Motor Vehicle Safety Standards; Brake Hoses
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