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Maintainability (Automotive) verification |
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|  MIL-H-62185(AT)
Table III. 4000 Mile Teat Combat Loaded or Simulated Load
(Government Proving Ground)
Course
Mileage & Speeds
Hard surface roads
1000 miles at varying speeds up to maximum
Gravel and dirt
2000 miles at varying speeds up to maximum with 300 miles
roads
of this distance over hilly conditions
Level cross-country
600 miles at varying speeds up to maximum
Hilly cross-country
400 miles at varying speeds up to maximum
4.2.3.1 Reliability (automotive) verification. To determine conformance to 3.2.1, reliability
requirement will be verified as a point estimate while the vehicles are subjected to Initial
production test. The mean miles between failure (MMBF) shall not be less than specified.
4.2.3.2 Durability (automotive) verification. To determine conformance to 3.2.2, the
durability requirement will be verified as a point estimate while the vehicle is subjected to initial
production test.
4.2.3.3 Maintainability (Automotive) verification. To determine conformance to 3.2.3, the
maintainability requirements will be verified during initial production test.
4.2.3.4 Test failure. Failure of the vehicle as the result of any deficiency of a workmanship
or materials nature during, or as a result of, the 4000 mile test, shall be cause for rejection of the
vehicle. Further, the Government may refuse to continue acceptance of production vehicles until
evidence has been provided by the manufacturer that corrective action has been taken to eliminate
the deficiency. Any deficiency found during, or as a result of the 4000 mile test shall be prime
facie evidence that all vehicles already accepted prior to completion of the 4000 mile test are
similarly deficient unless evidence satisfactory to the contracting officer is furnished by the
contractor that they are not similarly deficient. Such deficiencies on all vehicles shall be corrected
by the contractor at no cost to the Government.
4.3 Break-in run, (track). To determine conformance to 3.5.1, 3.5.2, and 3.5.3 each vehicle
shall be lubricated and serviced prior to the break-in run. The run shall be on smooth, level,
hard-surface roads, and for the distance specified in table II. The vehicle shall be operated in
reverse after each division as specified in 3.5.4. The undulating portion of the test shall be
accomplished twice in each direction at speed between 5 and 10 mph during division "a" and
between 11 and 14.5 mph during division "b".
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