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|  MIL-S-20706A
position and in the carrying position when not in use and a spring
actuating mechanism when specified (see 3.9.3). When the shank is
in the working position, the housing shall hold the shank vertical
(90 degrees to the ground line in two planes). The housings shall
be constructed so that when the shank is in the carrying position
the bottoom of the tooth shall have a ground clearance of not less
than 1-1/2 inches. The housing shall not extend rearward more than
3 inches from the vertical plane of the working face of the shank.
All bolt holes shall be spaced to fit the mounting brackets within
plus or minus l/32 inch and shall be of the diameter specified for
the size of tractor specified. The overall horizontal dimensions
of the housing measured from the vertical plane of the upper mold-
board bracket shall not exceed the amount specified in table IV.
Table IV.
Housing Dimensions
3.9.1 Shank. The shank shall swing from the housing assembly and be
of sufficient length for the tooth to penetrate below the cutting edge
of the dozer not less than the amount specified in table I. Individual
shanks shall be of sufficient strength to withstand the maximum pull
of the tractor without distortion or failure. The entire shank shall
be located rearward of any moldboard surfaces. The horizontal distance
from the cutting edge of the tooth to the vertical working surface of
the shank shall be not less than 7 inches. The shank in any position
of adjustment shall not interfere with any part of the tractor. The
lower tip of the shank shall accept and retain under maximum load a
replaceable teeth conforming to MIL-T-20705. The section of the shank
6
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