JLG 340AJ Service Manual - Manual (Page 19)

SECTION 1 - SPECIFICATIONS
3121259 – JLG Lift – 1-3
1.6 FUNCTION SPEEDS
Test Notes
1. Stop watch should be started with the function, not
with the controller or switch.
2. Drive test results reflect 20"x 9" air filled tires.
3. All speed tests are run from the platform. These speeds
do not reflect ground control operation.
4. The platform speed control knob must be at full speed
(turned clockwise completely).
5. Function speeds may vary due to cold, thick hydraulic
oil. Tests should be run with the oil temperature above
100° F (38° C).
6. Some flow control functions may not work with the
speed knob clicked into the creep position.
Table 1-9. Function Speed
Function
Speed Tolerances
(Seconds)
Main Lift Up 19-25
Main Lift Down 13-19
Swing Right & Left
(Max 10% Difference Between Left & Right) 58-72
Telescope Out 12-18
Telescope In 15-21
Platform Rotate Left & Right
(Max 15% Difference Between Left & Right) 23-34
Jib Up 24-30
Jib Down 15-21
Lower Lift Up 15-21
Lower Lift Down 14-20
High Drive Forward & Reverse
(200 Feet) 42-47 (2.9-3.2 MPH)
Drive Above Horizontal Forward & Reverse
(50 Feet) (CE) 57-85 (0.4-0.6 MPH [0.6-
0.9 kph])
Table 1-10. Function Speed Machine Position
Function Machine Position
Main Lift Boom retracted, telescope in. Main lift up, record time. Main
lift down, record time.
Swing Boom at full elevation, telescope retracted. Swing the turnta-
ble to the end stop. Swing the opposite direction, record time.
Swing the other direction, record time.
Telescope Boom at full elevation, telescope retracted. Telescope out,
record time. Telescope in, record time.
Drive Test should be done on a smooth, level surface. Start approxi-
mately 25 feet from starting point so that the unit is at a max-
imum speed when starting the test. Results should be
recorded for a 200 foot course. Drive forward, record time.
Drive reverse, record time.
Drive (Above Hori-
zontal) Test should be done on a smooth, level surface. The platform
speed control knob should be selected out of creep speed.
This verifies that the switches are working when the boom is
above horizontal. Results should be recorded for a 50 foot
course. Drive forward, record time. Drive reverse, record time.
Platform Rotate Platform level and completely rotated one direction. Rotate
the opposite direction, record time. Rotate the other direc-
tion, record time.
Jib Platform level and centered with the boom. Start with jib
down. Jib up, record time. Jib down, record time.
Lower Lift Main boom horizontal, telescoped in. Lower lift up, record
time. Lower lift down, record time.
Jib Swing Platform level and centered with the boom. Start with jib at
horizontal. Begin with jib swung fully to left. Swing fully to
right, record time. Swing to left, record time.
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