MIL-DTL-62027K
3.4.9 Environmental. The dolly set shall be capable of operating under extreme
conditions of weather in ambient air temperatures ranging from -46 to 52°C (see 4.6.5.10).
3.4.10 Life cycle.
3.4.10.1 Reliability. The reliability of the dolly sets shall have a specified value (SV) of
9656 mean kilometers between failure (MkmBF) and shall be demonstrated in accordance with
the operational profile (see 3.4.10.1.1). For calculation of (MkmBF), a failure shall be defined as a
condition which (see 4.6.5.11):
a.
Prevents operation, or
b.
Reduces performance below essential levels, or
c.
Indicates to the crew that further operation would be unsafe, or
d.
Indicates to the crew that further operation might result in extensive damage to the
equipment.
Any of the aforementioned conditions which cannot be corrected by the crew in one hour using
the tools and parts normally carried on the prime mover constitutes a failure. Maintenance and
human-induced failures are excluded.
3.4.10.1.1 Operational profile. The 9656 km of operation shall be apportioned as
specified below with speeds varying up to maximum:
a.
Hard-surfaced roads 45% - rated payload.
b.
Gravel and dirt roads 25% - rated payload.
c.
Level cross-country 15% - rated payload.
d.
Level cross-country 5% - empty.
e.
Hilly cross-country 6% - rated payload.
f.
Hilly cross-country 2% - empty.
g.
Belgian block 1.5% - rated payload.
h.
Belgian block 0.5% - empty.
3.4.10.2 Maintainability. Total active maintenance, excluding driver and crew checks and
services, shall not exceed 18 man-hours during 9656 km of operation as specified in table I. This
equates to a maintenance ratio (MR) of 0.06 at 32 km/h per-of-operation. The scheduled
maintenance interval shall be conducted according to technical manual instructions (see 4.6.5.12).
3.5 Painting. Metal treatment, priming, and finish painting shall be in accordance with the
manufacturer's standards. When specified (see 6.2), the top coat shall conform to an appropriate
chemical agent resistant coating (CARC) and the color shall be forest green (see 4.6.2).
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