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|  MIL-C-62310A(AT)
10942803
- Lubrication Chart, Production, Fuel and Coolant.
12253500
- Chassis, Weapon, Full-tracked (M901)
(Copies of specifications, standards, drawings, and publications required by contractors in
connection with specific procurement functions should be obtained from the procuring activity,
or as directed by the contracting officer.)
3. REQUIREMENTS
3.1 First article (preproduction). When specified (see 6.2), the contractor shall furnish
sample units for first article inspection and approval (see 4.3 and 6.3).
3.2 Initial production vehicles. Vehicles manufactured on initiation of quantity production
shall be inspected, and shall pass, initial production inspection (see 4.4). Initial production
vehicles shall be representative of vehicles to be furnished under this specification, and shall
include all current modifications. No modification shall be applied to subsequent vehicles
without approval of the Government.
3.2.1 Reliability. Reliability shall be not less than 750 Mean Miles Between Failure
(MMBF) during the first 5,000 miles, when operated in accordance with the operational profile
(see 3.2.4). For calculating MMBF, the definition in the M113A2 family 50 mile mission failure
scoring criteria shall be used (see 6.11).
3.2.2 Durability. The vehicle with rated payload shall have a 50 percent probability of
completing the first 5,000 test miles without replacement, rebuild, or major overhaul of the
engine, transmission, transfer gear unit, differential steer unit, or final drives, and without repair
or rebuild of the hull, when operated in accordance with the operational profile (see 3.2.4).
3.2.3 Maintainability. Total maintenance, excluding driver/crew checks and services, shall
not exceed 175 manhours during 5,000 miles of operation in accordance with the operational
profile (see 3.2.4). This equates to a Maintenance Ratio (MR) of 0.35 at 10 operational miles,
equivalent to one operational hour. The scheduled maintenance interval shall be three months or
750 miles, whichever comes first.
3.2.4 Operational profile. Test mileage shall be apportioned as follows:
a. 20 percent hard-surfaced roads
b. 40 percent secondary roads
c. 40 percent cross country
NOTE: During operation on hard-surfaced roads and cross country, the vehicle shall be
capable of towing a vehicle of equal weight for 20 miles in each mode.
3
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