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Page Title:
Test Method No. 7 Longitidinal Gradeability - Emergency Stopping |
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| MIL-T-52843C
APPENDIX
TEST METHOD NO. 7
LONGITUDINAL GRADEABILITY - EMERGENCY STOPPING
1.
TEST COURSE:
The length of the test course shall be not less than three times
the wheelbase of the forklift, graded to the specified slope,
within plus or minus 1 percent grade. Grade resistance shall be
sufficient to prevent significant wheel slip.
2.
TEST APPARATUS:
Speed indicator.
3.
TEST PROCEDURE:
a. Drive the forklift with rated load forward up the slope,
entering the course at a speed of not less than 2 mph, nor
more than 4 mph. Continue through the course, maintaining a
speed of not less than 2 mph. Make a total of three such
passes up each slope specified for ascending operation.
b. Use the same procedure as described in "a", moving forward
down the slope specified for descending operation.
c. Drive the forklift with rated load forward onto the slope
specified for brake operation, then stop and hold the forklift
with the service brakes for not less than 1 minute, with the
forklift in neutral gear range. Set the parking brake, lower
the load, release the service brake, and hold for not less
than 1 minute. Shift into forward, raise the load, release the
parking brake, and continue up the slope off the course.
d. Use the same procedure as described in "c", moving forward
down the slope.
e. Position the forklift with rated load at the top of and facing
down the slope specified for braking operation. Shut off the
engine and allow the forklift to roll down the slope in
neutral gear range, until a speed of 2 mph is attained. Apply
the emergency brake provisions (parking or service brake as
applicable) and bring the forklift to a stop. Release the
brake, allow the forklift to begin to roll, and apply the
brake again to stop the forklift, and repeat for a total of
six dead engine stops.
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