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Page Title:
Table IV. Maximum tractor characteristics. |
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|  MIL-S-62095C(AT)
(f)
Failure of any vehicular safety device such as brakes or electrical circuits
(g)
Evidence of structural weakness in any part of the vehicles, vehicle components,
accessories or welds
(h)
Loose mountings of parts or accessories due to workmanship or vehicular operation.
* 4.3.4 Brake tests. Brake tests to determine conformance to requirements shall be conducted
during the road test. The brake tests shall be conducted with the fully loaded semitrailer coupled
to a truck tractor. The truck tractor shall have a gross vehicle weight rating (GVWR) and gross
combination weight rating (GCWR) not exceeding that specified in table IV. The truck tractor
shall be without excessive brake capacity. GVWR and GCWR shall be the maximum ratings on
the tractor only and not necessarily the actual maximum GVW and GCW of the combination of
test vehicles. Failure of the vehicle combination to stop within the required 12 200 mm (40 feet)
from a speed of 32 km/h (20 mph) shall be cause for rejection.
TABLE IV. Maximum tractor characteristics.
Size of semitrailer
Max. tractor GVWR
Max. tractor GCWR
kg (pounds)
kg (pounds)
1
12 700
(28,000)
22 700
(50,000)
2
14 500
(32,000)
29 500
(65,000)
* 4.3.5 Turning ability test. A truck-tractor shall be coupled to the semitrailer and driven
through turns up to 90 degrees to the towed vehicle, right and left, to determine conformance to
3.3.1. At the conclusion of five turns in each direction, the tractor and the semitrailer shall be
examined for evidence of binding, misalinement or other damage.
* 4.3.6 Parking brake test. To test parking brakes, the semitrailer, with rated payload, shall be
placed on a grade, first headed up the grade and then headed down the grade, and tested to
determine conformance to 3.10.1. These tests shall be conducted with the semitrailer
disconnected from the towing vehicle and resting on the landing legs.
* 4.3.7 Landing leg test. With the semitrailer disconnected from the towing vehicle and loaded
as specified in 3.4, the landing legs shall be raised and lowered to vary the height of the upper fifth
wheel over the landing gear's full range, to determine conformance to 3.12 and 3.12.1. The
loaded semitrailer shall be coupled and uncoupled no less than 5 times and the landing legs shall
be examined for binding or misalinement.
* 4.3.8 Electrical test. An electrical test shall be conducted to determine that all vehicle lights
are functioning. In addition, when an inner connected 24-volt system is furnished, the circuits of
the 12-contact receptacle shall be energized with not less than 28 volts dc regulated voltage for a
24
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