MIL-C-53057(ME)
APPENDIX
TEST METHOD NO. 10
STEERING WHEEL AND PARKING BRAKE FORCE
1. TEST APPARATUS:
a. Force measurement equipment.
b. Stopwatch.
c. Linear measurement equipment.
2. TEST PROCEDURE:
a. With the engine operating at low idle, determine the time,
and the tangential force at the steering wheel rim, required
to turn the wheel from stop to stop in both directions.
Repeat 2 more times.
b. Repeat 2a except that engine shall operate at maximum
governed speed.
c. Count the number of revolutions required to turn the wheel
from stop to stop in each direction. Repeat 2 more times.
d. Apply a minimum 300 pound force downward perpendicular to the
rim of the steering wheel approximately midway between two
spokes and hold for a minimum of 10 seconds.
e. Repeat 2d except the force shall be applied upward.
f. Apply a minimum 150 pounds force tangentially to the rim of
the steering wheel, ant hold for a minimum of 10 seconds.
g. Repeat 2f in the opposite direction.
h. Measure seat to steering wheel clearance and directional
control to steering wheel clearance.
i. Determine the force necessary to apply the parking brake at
the center of the handgrip or at the center oŁ the foot pedal
whichever is applicable, tangential to the arc of its travel
for pivoted types, or parallel to the path of its travel for
lever types. Record the highest force observed.
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