Interpretation ID: aiam1560
Manager
Automotive Safety Engineering
General Motors Corporation
Warren
Michigan 48090;
Dear Mr. Martin:#This responds to General Motors' July 10, 1974 request for interpretation of paragraph S3., *Application*, of Standard No. 106-74, *Brake hoses*, relative to brake booster hose. You refer to language in the preamble to Docket No. 1-5 Notice 11, published June 28, 1974 (39 FR 24012), which stated:#>>>The NHTSA has concluded that the difference in requirements for the hydraulic booster system justifies special performance requirements for this application. Until these requirements are developed, hydraulic brake booster hose running from pump to accumulator will be considered to be exempt from the requirements of this standard. Hose running from accumulator to booster will also be exempted if redundant booster is provided.<<<#This language exempts hoses used in certain functions, but not all. Clearly, booster hose running from accumulator to booster without redundant boost would not be exempt. Therefore, your conclusion that Standard No. 106-74 does not apply to any hydraulic brake booster hose, hydraulic brake booster hose end fittings, or hydraulic brake booster hose assemblies is overbroad and for that reason incorrect.#We suggest you describe in another letter the booster applications in General Motors vehicles which are not clearly categorized by the Notice 11 language. We will then be able to tell you whether or not they are subject to the requirements of Standard No. 106-74.#Yours truly,Richard B. Dyson,Acting Chief Counsel;