Interpretation ID: nht75-1.5

DATE: 04/22/75

FROM: AUTHOR UNAVAILABLE; J. C. Schultz; NHTSA

TO: Kazuhiko Aoki

TITLE: FMVSS INTERPRETATION

TEXT:

APR 22 1975 N40-30 TWH)

Mr. Kazuhiko Aoki 2-3 Nihonbashi Koami-cho 1-chome Chuo-ku/ Toykyo, Japan 103

Dear Mr. Aoki:

This responds to your January 30, 1975, question whether the test procedure of S7.7.1 in Standard No. 105-75, Hydraulic brake systems, refers to the parking brake in the next to the last sentence which states that it "may be necessary to reapply it if the vehicle moves slightly" (emphasis added).

The word "it" refers to the service brake system, and not the parking brake system. This sentence permits application of the service brake only, which has the effect of taking up parking brake system slack due to rotation of the brake shoes and drum prior to bottoming against the anchor pin.

Sincerely,

James C. Schultz Chief Counsel