Upright LX31, Руководство по обслуживанию

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LX13/41 Electric Work Platform 2-7
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.7
2.7 L
OWERING THE
P
LATFORM
From the Platform Controls
1. Select platform at the Chassis/Platform Switch.
2. Pull the Control Handle backward.
a. This will energize;
• the Down Relay (completing the circuit to the
Down Solenoid Valve)
• and the Down Alarm Relay (completing the
circuit to the Down Alarm).
b. This will sound the down alarm, and allow oil to
flow;
• out of the Lift Cylinder
• through the Down Orifice (regulating the
descent speed)
• through the Down Valve
• through the Lift Valve
• and out to the Hydraulic Reservoir.
From the Chassis Controls
1. Select chassis at the Chassis/Platform Switch.
2. Press the Down Button
a. will energize;
• the Down Relay (completing the circuit to the
Down Solenoid Valve)
• and the Down Alarm Relay (completing the
circuit to the Down Alarm).
b. This will sound the down alarm, and allow oil to
flow;
• out of the Lift Cylinder
• through the Down Orifice (regulating the
descent speed)
• through the Down Valve
• through the Lift Valve
• and out to the Hydraulic Reservoir.
Emergency Lowering
The Down Alarm WILL NOT SOUND when lowering
the platform with the Emergency Lowering Knob.
Pull out on the Emergency Lowering Knob to
mechanically open the Down Valve. This will allow oil
to flow;
• out of the Lift Cylinder
• through the Down Orifice (regulating the descent
speed)
• through the Down Valve
• through the Lift Valve
• and out to the Hydraulic Reservoir.
2.8 D
ESIGN
F
EATURES
The LX31/41 has the following features to insure safe
operation:
1. The Lift Valve will not energize unless the chassis
is level.
2. A warning alarm sounds and Drive Valves are de-
energized, if the work platform should become
unlevel while elevated.
3. A motion alarm sounds when the work platform is
lowering.
4. The platform descent rate is controlled by an ori-
fice. The Lift Cylinder is equipped with a holding
valve to prevent descent should a leak develop.
5. The drive speed is limited to “creep” speed when
operating the work platform while elevated.
6. Holding brakes are automatically engaged when
the Drive Valves are de-energized from the Con-
troller or from a loss of power.
7. The Platform and Chassis controls are each
equipped with an Emergency Stop Switch.
8. Up and Down Buttons are located in the Control
Module on the chassis for lifting and lowering the
work platform from ground level.
9. The Down Valve can be operated manually by
means of a cable linkage in the event of powered
function failure.
10. Dynamic braking, and runaway protection are
provided by the use of Counterbalance Valves in
the drive system.
11. A Level Sensor is used to sense when the
machine is unlevel, disabling lift functions, and
drive when elevated.