Interpretation ID: aiam2560

Mr. R. W. Hildebrandt, Group Director of Engineering, Heavy Vehicle Systems Group, The Bendix Corporation, 901 Cleveland Street, Elyria, OH 44035; Mr. R. W. Hildebrandt
Group Director of Engineering
Heavy Vehicle Systems Group
The Bendix Corporation
901 Cleveland Street
Elyria
OH 44035;

Dear Mr. Hildebrandt: This responds to Bendix Corporation's March 29, 1977, request fo confirmation that the manual adjustment of automatic adjusters is acceptable following the burnish procedures of Standard No. 121, *Air Brake Systems*, at the option of the manufacturer.; The procedure that you recommend is not permitted by any provision o Standard No. 121. The NHTSA would consider some provision to deal with the overadjustment of automatic adjusters upon receipt of technical data showing justification for such action. Based on consideration of the data received and a petition for amendment, the agency could commence a rulemaking proceeding in accordance with established procedures.; I have enclosed a copy of a similar interpretation made to Rockwel International.; Sincerely, Frank A. Berndt, Acting Chief Counsel