MIL-DTL-62027K
4.6.5.9 Lifting devices and attachments. To determine conformance to 3.4.7 and 3.4.8,
the dolly set shall be attached to the applicable shelter on both level and rough terrain without
using special tools or equipment. Attachment time shall be observed. The dolly set, with attached
shelter, shall be placed on rough terrain and both mechanical and hydraulic systems, as applicable,
shall be operated to level and lift the shelter as specified. Not less than four complete cycles shall
be conducted.
4.6.5.10 Environmental. To determine conformance to 3.4.9, the dolly set, properly
serviced and equipped, shall be operated at the temperatures specified. The dolly set shall
evidence no damage as a result of such operation.
4.6.5.11 Reliability. To determine conformance to 3.4.10.1, a point estimate value equal
to or greater than 9656 MkmBF shall be demonstrated while the dolly sets are subjected to the
9656 km test specified in table IV. The point estimate shall be determined using cumulative test
mileage of all dolly sets divided by the cumulative number of chargeable failures of all dolly sets.
TABLE IV. 9656 kilometer test 1/.
Course
Kilometer and speeds
Hard-surfaced roads
4345 km at varying speeds up to maximum
Gravel and dirt roads
2414 km at varying speeds up to maximum
Level cross-country roads
1931 km at varying speeds up to maximum
(483 km of this kilometer shall be unloaded)
Hilly cross-country roads
773 km at varying speeds up to maximum
(193 km of this kilometer shall be unloaded)
Belgian block roads
193 km at varying speeds up to maximum
(48 km of this kilometer shall be unloaded)
1/ Except as otherwise specified herein, the dolly set shall be loaded with rated
payload.
4.6.5.12 Maintainability. To determine conformance to 3.4.10.2, a MR of less than or
equal to 0.06 as specified in 3.4.10.2 shall be demonstrated during the 9656 km test specified in
4.6.5.11. The maintenance shall be performed by the Government at the approved test site
according to technical manual instructions. The MR shall be determined using the ratio of total
active scheduled and unscheduled maintenance manhours to the total operating hours.
Chargeable active schedule maintenance includes both servicing time and inspection time above
operator level. Chargeable active unscheduled maintenance includes diagnostic for on - vehicle
repairs only. This maintenance must be the result of hardware or technical manual problems and
will not include: errors, checks, services, operator repairs, maintenance errors, or test item abuse.
Total operating hours (OH) shall be determined based on the following formula:
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