Time VERSALIFT VST-7500-I, Руководство оператора

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5-1
29084-05 03/17 VERSALIFT VST-7500-I
EMERGENCY
OPERA
TION
Bleeder Ports
Figure 5.1
Set Screw Type Bleeder
- Turn the set screw slowly
using an Allen wrench to release load. Do not turn
the body. Oil is released from the hole on the side of
hex body.
Plug Type Bleeder
- Turn the entire plug slowly
using a wrench to release load. Do not remove the
plug. Oil is released from the notch in the threads.
Torque to 10-15 ft-lbs. after use.
Extension Cylinder Bleeder Ports
(Shown on bottom, port also located on top)
Figure 5.2
Upper and Lower Cylinder Bleeder Ports
Figure 5.3
Emergency operation may be required if an operator
is injured or the hydraulic system malfunctions. This
chapter describes the controls and features
designed to accommodate emergency operation
and to describe some procedures for responding to
emergency situations. In an emergency, the first
priority is always the safety of the personnel. Before
attempts are made to rescue personnel, make sure
the unit has not become electrically energized.
Identifying the problem and initiating emergency
procedures promptly helps minimize or possibly
prevents injuries. It is important to follow standard
work practices and safety regulations.
DANGER:
BEFORE ATTEMPTING
TO RESCUE PERSONNEL ON THE AERIAL LIFT,
ALWAYS MAKE SURE THAT THE TRUCK AND
THE AERIAL LIFT HAVE NOT BECOME
ELECTRICALLY ENERGIZED. CONTACT MADE
BY RESCUERS FROM THE GROUND WITH AN
ENERGIZED UNIT WILL CAUSE DEATH OR
SERIOUS INJURY.
CONTROL SELECTOR (Platform Override) - If a
situation requires overriding the upper controls (i.e.
an injured operator in the platform), use the selector
control at the turret to transfer control to the lower
controls. The upper controls will not be operable and
the lower controls can be used to lower the operator
to the ground. Refer to Lower Control paragraph in
Section 4, Operation in this manual.
BLEEDER PORTS - If the hydraulic system
becomes inoperable with an operator aloft, bleeder
ports on the cylinders (Figures 5.2 and 5.3) can be
used to lower the booms and return the operator to
the ground. Qualified personnel at the site are
responsible for selecting the path of boom descent.
The unit may be equipped with two different type of
bleeder ports. Refer to Figure 5.1 for identification
and proper procedures for loosening the bleeder
ports. Carefully loosen the bleeder plug, on the
appropriate bleeder port. Be prepared for a flow of
hot oil escaping around the bleeder plug and step
away from the boom path of descent. The speed at
which the lower boom drifts down depends on the
rate of oil loss.
EMERGENCY OPERATION