MIL-DTL-11891G(AT)
APPENDIX B
B.3.18.1 Fifty mile scenario. During the test, operators are to run one 50 mile scenario at
a time in accordance with the mission profile requirements stated below. A mission profile
requirement will consist of the following:
Secondary road.....................25 miles
Paved road............................12.5 miles
Combined X country..............12.5 miles
B.3.18.2 Track switching. Upon completion of the first 500-mile mission scenario, the
track strands shall be removed from the vehicle, inspected for overall condition, and switched to
the opposite side. At 1000 miles, the track strands shall be removed from the vehicle, inspected
for overall condition, and switched to the opposite side. Repeat this switching procedure for
every 500 miles of testing.
B.3.19 Inspection and replacement criteria. Inspection and replacement criteria during
the on-vehicle test shall be in accordance with the table VII.
B.3.20 Failure criteria. Failure of a contractor's track will be established when 20% of its
total shoe samples have reached wearout and/or need replacement. See table VII.
B.3.20.1 Pad sample failure. The contractor's pad sample shall be considered failed when
40% of the pads reach wear-out and/or need replacement. See table VII.
B.3.20.2 Track or pad failures (break-in). Any track or pad failures which occur during
break-in or are damaged as a result of the following incidents will not be counted against
qualification requirements:
a. Mechanical failure of non track parts resulting in track damage.
b. Sprocket damaged shoes.
B.3.21 Disposition of track test hardware. All track test hardware shall be retained at the
test site pending disposal instructions, including failed track components. Track that is defective
or has completed testing may be stored outdoors while waiting for disposition instructions. It is
essential that each manufacturer's track samples are not commingled with samples from another
manufacturer.
B.3.21.1 Failed track component marking. All failed track components shall be tagged
and marked so as to identify accumulated test miles and cross reference to daily logs or test
reports, as appropriate to provide for traceable component failure history.
58
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business