JLG 740AJ, Руководство по обслуживанию и ремонту

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SECTION 6 - JLG CONTROL SYSTE M
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6.3 MACHINE ORIENTATION WHEN DOING SPEED
TESTS
Tower Lift: Upper Boom horizontal, telescoped in. Tower lift
up, record time. Tower lift down, record time.
Lift: Tower lift fully elevated, tower telescope fully extended,
main telescope fully retracted.
Swing: Boom at full elevation, telescope retracted. Swing the
turntable off center and stop. Swing the opposite direction
and start the test when the turntable is centered up. This elim-
inates ramp up and down on the controller affecting times.
Telescope: Boom at full elevation, telescope retracted. Tele-
scope out, record time. Telescope in, record time.
Drive: Test should be done on a smooth, level surface. Drive
select switch should be set at high speed. Start approximately
25 feet from starting point so that the unit is at maximum
speed when starting the test. Results should be recorded for a
200 foot course. Drive forward, record time. Drive reverse,
record time.
Drive (Above Horizontal): Test should be done on a smooth,
level surface. Drive select switch should be set at low engine,
low drive. The platform speed control knob should be selected
to the creep speed. This simulates machine speed when the
boom is above horizontal. Results should be recorded for a 50
foot course. Drive forward, record time. Drive in reverse, record
time.
Platform Rotate: Platform level and completely rotated one
direction. Rotate the opposite direction, record time. Rotate
the other direction, record time.
Articulating Jib : Platform level and centered with the boom.
Start with jib down. Jib up, record time. Jib down, record time.
Test Notes
1. Stop watch should be started with the function, not
with the controller or switch.
2. Drive test results reflect (15 X 19.5 OR 18 X 19.5). Tires on
740AJ is, air or foam filled.
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 6-7. Function Speeds (In Seconds)
Function
740AJ
Speed Tolerances
(Seconds)
Main Lift Up 45-50
Main Lift Down 45-50
Swing Right & Left
NOTE: Max 10% Difference Between
Left & Right
79-101
Platform Rotate Left & Right
NOTE: Max 15% Difference Between
Left & Right
19-30
Jib Up 20-30
Jib Down 30-40
Tower Lift Up 57-70
Tower Lift Down 44-53
Drive (2-WD)
Forward & Reverse 33-45
Drive (4-WD)
Forward & Reverse 33-45
Drive (2 & 4-WD) Horizontal
Above elevation forward & reverse (CE) 122 MIN
Drive (2WD) Horizontal above elevation
Forward & reverse (ANSI) 61-70
Drive (4WD) Horizontal above elevation
Forward & reverse (ANSI) 122 MIN
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