Truck and dolly-semitrailer compatibility test

Page Title: Truck and dolly-semitrailer compatibility test
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MIL-C-52128C

4.6.2.3.2 Truck and dolly-semitrailer compatibility test. With the Government-loaned M917

dump truck and dolly-semitrailer in towing position, jackknife the truck-dolly-semitrailer

combination until the centerline of the truck is at an angle of at least 60 degrees with the

centerline of the dolly. Next, tow the dolly-semitrailer combination at minimum truck turning

radius to the right and to the left. Test all lights. Repeat the tests using the Government-loaned

M916 truck-tractor in lieu of the M917 dump truck. Interference between the truck and any part

of the dolly or semitrailer, or lights not functioning shall constitute failure of this test.

4.6.2.3.3 Truck and semitrailer compatibility test. Couple the Government loaned M916

truck-tractor to the semitrailer and tow the combination at the minimum turning radius of the

truck to the right and to the left. Repeat the tests with the Government-loaned M920

truck-tractor. Jackknife each truck-tractor to an angle of at least 90 degrees with respect to the

semitrailer. Incompatibility with either the truck or truck-tractor, or interference with the truck

or truck-tractor by any part of the trailer shall constitute failure of this test.

4.6.2.3.4 Dolly and semitrailer compatibility test. With the dolly and semitrailer in travel

position, hold the lunette between 32 and 34 inches from the ground and turn the towbar at least

110 degrees to the right and to the left of the centerline of the semitrailer. Interference between

the dolly and any part of the semitrailer shall constitute failure of this test.

4.6.2.3.5 Railroad and air transport. Sectionalize and reassemble the crusher.

Nonconformance to 3.17.2, and 3.17.3 shall constitute failure of these tests. The tests for

sectionalization and for lifting and tiedown attachments may be accomplished in conjunction

with the tests specified in 4.6.2.3.6.

4.6.2.3.6 Lifting and tiedown attachments. Apply the static load specified in 3.22 for lifting

attachments and 3.23 for tiedown attachments after the attachments are mounted on the crusher

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 crusher or section shall constitute failure of this test.

4.6.2.3.7 Tiedown attachments (dynamic). Anchor each section of the crusher

independently, as sectionalized for rail transport, to a flatcar using only the tiedown attachments.

Use no blocking. Hump the flatcar at a speed of 7 miles per hour against five boxcars 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.

4.6.2.4 Electromagnetic interference. The preproduction model shall be tested to determine

conformance with 3.19. The contractor shall furnish the contracting officer the report of tests.

Disapproval of the report shall constitute failure of this test.

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