MIL-DTL-85537A(AS)
TABLE I. First article and conformance inspections.
First
Sequence
Test
Requirement
Test Paragraph
Article
Conformance
1
Examination
3.2
4.5.1
X
X
of product
2
Functioning
3.3.1
4.5.2
X
X
3
Towing Force
3.4
4.5.5
X
4
Breakaway
3.4
4.5.5.1
X
5
Side Slope
3.5
4.5.6.3
X
6
Service Brake
3.3.3.2
4.5.4.2
X
7
Mobility
3.5
4.5.6
X
8
Parking Brake
3.3.3.1
4.5.4.1
X
9
Overload
3.3.2
4.5.3
X
X
4.5.4 Brake system tests. The trailer shall be loaded with an 8,500 (+100, -0) pound test load
consisting of bulk material (steel or concrete) placed across the open hatchway doors. The brake
system shall then be tested as specified in 4.5.4.1 through 4.5.4.2.2.
4.5.4.1 Parking brake tests. The trailer shall be loaded with an 8,500 (+100, -0) pound test
load and placed on a 10 degree inclined ramp, facing uphill. With parking brake applied, the
trailer shall not roll. The loaded trailer shall then be tested facing downhill. This test should be
performed after all mobility testing to ensure that the brakes have been burnished sufficiently to
achieve a successful test .
4.5.4.2 Service brakes. The trailer shall be loaded with an 8,500 (+100, -0) pound test load
and connected to a prime mover. The trailer test brakes shall then be tested as specified in
4.5.4.2.1 and 4.5.4.2.2.
4.5.4.2.1 Brake stopping capability test. Tow the loaded trailer at a speed of 20 mph on a
level, dry concrete surface. Stop by applying brakes of towing vehicle thus actuating the trailer
6
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