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Page Title:
Test Method No. 13 Highway and Rail Transportability |
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| MIL-T-52843C
APPENDIX
TEST METHOD NO. 13
HIGHWAY AND RAIL TRANSPORTABILITY
1.
TEST COURSE:
a. Paved roadway.
b. Railroad hump facility.
2.
TEST APPARATUS:
a. Towing vehicle with pintle hook and speed indicator.
b. Suitable rail-hump equipment.
c. Tow bar, medium duty capacity, MS500048.
3.
TEST PROCEDURE:
a. Highway transportability (towing).
(1) Disengage the driveline using one man provided with common
tools. Record the time and tools necessary to perform the
operation.
(2) Attach the towbar and safety chains to the towing vehicle
and pull the forklift for not less than 50 miles at 25
mph, plus or minus 5 mph. Observe tracking ability and
note any loss of control.
(3) At the conclusion of the 50-mile-towing, disconnect the
forklift from the towing vehicle, reengage the driveline
and operate the forklift to observe for damage.
b. Rail transportability (rail hump).
The truck shall be blocked, braced, and tied clown in accordance with
procedures contained in section 6, figure 54 of Association of
American Railroads (AAR) Rules Governing the Loading of Department of
Defense Material on Open Top Cars. The metal banding shown in the
figure should be replaced with wire rope cables that form loops (AAR
manual, section 1, rule 15 n, sketch 1) between the tiedown
provisions and appropriate stake pockets. Hump the car, with the
truck tied down at a speed of not less than 8 mph against five
unloaded boxcars with their brakes set. The truck shall face in the
direction of five cars. Repeat the procedures at not less than 8 mph
with the rear of the truck in the direction of the five cars. The
truck may be reversed by either reloading it in the specified
direction on the flatcar or by reversing the direction of the
flatcar. Once the test has begun, there shall be no readjustment of
load, nor any reconditioning of the blocks, chocking material, or
tiedowns except to reverse direction of the truck.
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