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slowed to 10 mph. Immediately accelerate to 30 mph. Repeat this snubbing cycle
for a total of 5 cycles and make a panic stop on the 6th cycle.
At 10 mph, cause the unit to go into "emergency", simulating a breakaway from the
dump truck and dolly-semitrailer.
Test the brake system in accordance with TTMA recommended practice RP3-1-12.
During the above tests, lights shall be on and turn signals actuated on turns. Upon completion of
the travel, remove the rims and wheels and examine the entire unit, including the rims and
wheels. Damage to or permanent deformation of any part of the unit, change in critical mounting
point dimensions, evidence of any weld being defective, inability to complete any portion of the
test, incompatibility with any towing vehicle, or operating difficulty shall constitute failure of
this test. Nonconformance to 3.14, 3.15, and 3.17 shall constitute failure of this test. Railroad and air transport. Sectionalize and reassemble the unit. Nonconformance
to 3.17.2, 3.17.3, or 3.17.4 shall constitute failure of these tests. The tests for sectionalization
and for lifting and tiedown attachments may be accomplished in conjuction with the tests
specified in and Lifting and tiedown attachments. Apply the static load specified in 3.22 for lifting
attachments and 3.23 for tiedown attachments to the attachments after the attachments are
mounted on the unit or section, as applicable. The direction of the applied load shall be in the
direction in which the load is normally applied. Weld failure or permanent deformation of the
attachment or of any component of the unit or section shall constitute failure of this test. Tiedown attachments (dynamic). Anchor each section of the unit independently, as
sectionalized for rail transport, to a flat car using only the tiedown attachments. Use no
blocking. Hump the flatcar at a speed of 7 miles per hour against five box cars with their brakes
set. Repeat the test with the opposite end of the section in the direction of the five cars. Any
permanent deformation or breakage of the tiedown attachments or parts of the section shall
constitute failure of this test. Electromagnetic interference. The preproduction model shall be tested to determine
conformance to 3.19. The supplier shall furnish to the contracting officer the test report required
by MIL-STD-461. Disapproval of the report shall constitute failure of this test. Production. Operate each unit for a period of 1 hour without processing material.
Test each brake system in accordance with TTMA RP3-1-12. Any operational difficulties,

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