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|  MIL-V-62008B(AT)
to the applicable seasonal grade of MIL-L-2104 can be used. Specific applications by grades or
types for seasonal temperature ranges shall be as specified (see 6.4). Fuel and water separator
and primary fuel filter shall be bled of air by loosening each respective bleed plug and operating
the in-tank fuel pump. After air is bled, retighten the bleed plugs.
3.5.2 Oil pressure and temperature. Prior to start of the break-in run, the engine shall be
operated at 800 to 1200 revolutions per minute (rpm) until lubricating oil is at operating pressure
and temperature. If during break-in run the engine has been stopped for at least 30 minutes, the
engine shall again be operated as above before continuing break-in run. Proper oil pressure and
temperature shall be maintained during operation on level ground, 60 percent grades, and
30 percent side slope.
3.5.3 Operation and distance. Prior to tests, each vehicle shall be given a break-in run
for the distance specified in table II on smooth, level, hard-surfaced roads. The vehicle shall be
operated over the undulating section of road (see figure 5) during "a" and "b" divisions of the
break-in run in both directions.
TABLE II. Speeds and distances for break-in run.
Speed
Distance
Division of run
miles per hour
miles
Test conditions
(mph)
a..................
0 to 10
20
Track (road)
b..................
10 to 20
20
Track (road)
c..................
21 to max
10
Track (road)
3.5.4 Reverse operation. After each division of the break-in run, vehicles shall be
stopped, engine allowed to idle for not less than 2 minutes, and the vehicle driven in reverse for a
distance of not less than 50 feet at a speeds between 2 and 7 mph.
3.5.5 Condition after run. After completion of the break-in, the engine shall idle
between 700 and 750 rpm. Prior to vehicle being submitted to the Government for acceptance,
all suspension wheel bearings shall be checked to determine if adjustments are correct. There
shall be no defects or maladjustments that may cause faulty vehicle operation.
3.6 Performance. Complete vehicle, combat loaded or with a simulated load of equal
weight (see 3.4.2) and serviced, shall perform as specified herein. Ammunition may be
simulated in size and weight. Vehicle serviced (see 3.5.1) and equipped for existing climatic
conditions shall operate as specified without special equipment.
3.6.1 Environmental. Vehicle shall operate in ambient air temperature of 115F to
minus 25F, and with special equipment installed, the vehicle shall operate at temperatures
between minus 25F and minus 65F. Complete vehicle shall withstand storage between minus
65F and 155F without deterioration that may cause failure of any component part of the
vehicle.
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