MIL-DTL-62267B(AT)
steering ranges without binding of linkages, loss or lubricants, grabbing, chattering or slippage
when controls are applied to steer, stop, or hold chassis (see 4.5.4.1)
3.4.2 Environments. The chassis shall operate in ambient air temperature of 115 degrees
Fahrenheit (°F) to minus (-) 25°F (46 degrees Celsius (°C) to -31°C) and with special equipment
installed, at temperatures to -65°F (-53°C) (see 4.5.4.2).
3.4.2.1 Cooling system. With chassis operating in ambient temperature of 115°F (46°C),
the engine oil temperature shall not exceed 250°F (121°C) at the heat exchanger outlet. The
transmission oil temperature shall not exceed 300°F (150°C) at the heat exchanger inlet.
Temperature indicators on the driver's panel shall remain in the green area (see 4.5.4.2.1).
3.4.3 Level road acceleration. The chassis shall accelerate from a standing start on level
road through a distance of 200 ft (61 m) in a time period of not more than 13 seconds
(see 4.5.4.3).
3.4.4 Level road speeds. The chassis shall operate at sustained minimum and maximum
speeds of 2.5 miles per hour (mph) (4 kilometers per hour (km/h)) and 30 mph (48 km/h) on level
road without damage to power plant and power train (see 4.5.4.4).
3.4.5 Level road drift. When traveling between 25 and 30 mph (40 and 48 km/h) on level
road, in a straight line the chassis drift shall not exceed 3 ft (1 m) in 100 ft (30 m), without manual
steer correction (see 4.5.4.5).
3.4.6 Level road stopping. The chassis traveling at 20 mph (32 km/h) on level road, shall
stop within 60 ft (18 m) from point of brake application. Drift shall not exceed 4 ft (1.2 m).
Steering correction is allowed (see 4.5.4.6).
3.4.7 Grades and slopes. Chassis shall ascend longitudinal grades of 60% in forward and
reverse gear without stalling or damage to power plant and power train. Chassis shall operate on
right and left side slopes of 30%. During grade and slope operations, normal engine lubricating
oil pressures shall be maintained (see 4.5.4.7).
3.4.7.1 Engine starting (grades and slopes). Chassis standing on a 60% in grade for not
less than 2 minutes and with engine idling under no load between 700 and 750 revolution per
minute (rpm), the engine shall be stopped for not less than 2 minutes. The engine shall restart in
not more than 1 minute when headed either up or down grade. A similar engine stopping and
starting test shall be accomplished on 30% right and left side slopes (see 4.5.4.7).
3.4.7.2 Fuel supply (grades and slopes). During engine operation, the fuel system shall
maintain fuel supply to the engine when ascending and descending 60% grades in forward and
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