MIL-STD-1365C
After tests, operate the equipment at ambient temperature.
5.3.4.1.2 Low temperature. Unless otherwise specified in the applicable development specification or by the procuring activity (see 6.2), the equipment shall be tested in accordance with MIL-STD-810, Method 502.5, Procedure I. The following detail requirements shall apply:
a. Pre-test data shall be required.
b. Low storage and operating temperature shall meet the requirements of 4.9.1. After tests, operate the equipment at ambient temperature.
5.3.4.2 Humidity. The equipment shall be subjected to a humidity test in accordance with MIL-STD-810, Method 507.5, Procedure I. The following detail requirements and exceptions to the test program shall apply:
a. Pre-test data shall be required.
b. The equipment shall be subjected to a performance check immediately after completion of the tenth cycle, i.e., step 6 of the MIL-STD-810 test procedure shall be eliminated.
After tests, operate the equipment at ambient temperature.
5.3.4.3 Salt fog. The equipment shall be subjected to a salt fog test in accordance with MIL-STD-810, Method
509.5.
5.3.4.4. Sand and dust. The equipment shall be subjected to a dust test in accordance with MIL-STD-810, Method 510.5, Procedure I. Upon completion of test, it shall be demonstrated that equipment performs satisfactorily.
5.3.4.5 Rain. The equipment shall be subjected to a rain test in accordance with MIL-STD-810, Method 506.5. Procedure(s) shall be as specified by the procuring activity (see 6.2). Upon completion of tests, it shall be demonstrated that equipment performs satisfactorily.
5.4 Special requirements - trailers and loaders.
5.4.1 Parking brakes. Parking brakes, when mechanical, shall be designed so that structural deflection of the vehicle caused by rated load dynamic conditions will not actuate them.
5.4.1.1 Adjustment access. Adjustment of the mechanical brakes shall be possible without the removal or disassembly of any associated brake system components/related parts.
5.4.1.2 Force levels. The force levels required to fully energize the mechanical brake system shall not exceed
30 pounds if single hand operated or 50 pounds if foot operated.
5.4.2 Towing provisions. A maximum of four trailers shall be capable of being towed in tandem. The drawbar shall swivel in the vertical plane and shall be equipped with a standard lunette coupler ring having a nominal inside eye diameter of 3 inches. Strength characteristics shall be as specified by the applicable development specification. An associated pintle assembly for towing shall also be provided. The pintle shall have a towing capacity of 18,000 pounds and shall be sized to be compatible with the lunette coupler. Also, it shall be equipped with a manual release and shall be positioned from 14 to 21 inches above the static ground line.
5.4.2.1 Steering. The steering mechanism shall assure minimum differential tire wear. Sufficient mechanical advantage shall be provided through the drawbar to allow one man to manually steer the trailer under static full load conditions.
5.4.2.2 Automotive type steering. Methods shall be included for minute adjustment of parts that become misaligned because of wear. An access provision shall be made for lubrication. Means for adjusting the camber and toe-in of wheels shall be included.
5.4.2.3 Cramping stops. Stops shall be provided on the trailer chassis. They shall restrict the front wheel to a maximum cramping angle of 40 degrees to each side of the center track. However, oversteer designs are acceptable.
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