JLG 680S, Service And Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM
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6.3 MACHINE ORIENTATION WHEN DOING SPEED
TESTS
Lift : Telescope Retracted. Lift Up, and Record Time. Lift Down
and Record Time.
Swing : Boom lift at Full Elevation, Telescope Retracted, Swing
360 degrees and Record Time. Swing the Opposite 360
degrees and Record Time.
Telescope : Boom lift at Full Elevation, Telescope Out and
Record Time. Telescope In and Record Time.
Drive (Forward/Reverse) : Test should be done on a smooth
level surface. Drive Select Switch should be set to High Engine.
Results should be recorded for a 200 ft. course. Drive Forward,
Record Time. Drive Reverse, Record Time.
Drive (Elevated) : Test should be done on a smooth level sur-
face. Drive Select Switch should be set to High Engine. Results
should be recorded for a 50 ft. course. Drive Forward, Record
Time. Drive Reverse, Record Time.
Platform Rotate : Platform level and completely rotated one
direction. Rotate 180 degrees and Record Time. Rotate the
other direction, Record Time.
Test Notes
1. Stop watch should be started with the function, not
with the controller or switch.
2. All speed tests are run from the platform. These speeds
do not reflect the ground control operation.
3. The platform speed knob control must be at full speed
(turned clockwise completely).
4. Function speeds may vary due to cold, thick hydraulic
oil. Test should be run with the oil temperature above
100° F (38° C).
5. Some flow control functions may not work with the
speed knob clicked into the creep position.
Table 6-6. Function Speeds (In Seconds)
Function 680S
Main Lift Up 59-75
Main Lift Down 57-75
Swing Right & Left* 110-135
NOTE: No more than 10% difference between swing left and
swing right.
Main Telescope Out 50-56
Main Telescope In 38-49
Platform Rotate Right & Left* 18-30
NOTE: No more than 15% difference between rotate left and
rotate right.
Drive (Forward) 33-45
Drive (Reverse) 33-45
Drive (Elevated) 46-75
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