March 2008
"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 4-12
PROPORTIONAL SPEED ADJUSTMENT
Proportional Circuit Board Adjustment should only be performed after all other
components are deemed to be in proper working order.
There are many factors that may contribute to excessively fast or slow drive speeds. Proportional
Circuit Board Adjustment should only be performed after all other components are deemed to be
in proper working order and not contributing to abnormal driving speeds. Failure to do so may
result in incorrect speeds once the offending component has been repaired.
Circuit Board Setting Test Procedure
Before you begin, ensure there are no overhead obstructions preventing lift to full height. Lay out
a course measured at 20 feet (6 meters) long. Ensure there are no obstructions preventing a
straight travel over the distance of the course including leading up to and away from the course.
Try not to steer while driving the timed course.
High Speed Drive Test:
With the platform fully lowered, drive the machine over the course, crossing the start line at full
speed. Record the time it takes for a (predetermined) point on the machine to cross both lines
and compare with the chart below using the ‘High Range’ column figure.
Elevated Speed Drive Test:
Elevate the platform above 12 feet (3.6 meters). Drive the machine over the course, crossing the
start line at full speed. Record the time it takes for a (predetermined) point on the machine to
cross both lines and compare with the chart below using the ‘Low Range’ column figure.
20 FT (6m)
RUN-IN
RUN-OUT
TRIM POT
High Range
Low Range
TRAVEL TIME
IN SECONDS
3.5 to 4.0
27 to 33
Speed Adjustment Table: 20 ft. (6 m) Course
Содержание 3072RT
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