Time VERSALIFT VST-7500-I, Руководство оператора

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29084-05 03/17 VERSALIFT VST-7500-I
EMERGENCY
OPERA
TION
starter, do not crank the engine for more than 30
seconds continuously.
The engine start/stop control
at the upper or lower controls may be used while
actuating the lift function.
At the upper controls,
the engine start/stop control is
operated by an air cylinder. The air cylinder plunger
knob is pushed down and held until the engine starts.
The plunger knob may require a second push to set
the latching relay into the start position. Another push
on the plunger knob will stop the engine.
At the lower controls,
the engine start/stop system
is operated by momentary toggle switch. This
system is activated by pushing the switch to the
“START/STOP” position. It may require a second
push to set the latching relay in the start position. To
stop the engine push the switch to the “START/
STOP” position once more.
INJURED OR INCAPACITATED OPERATOR - If
the operator is unable to operate the aerial lift,
determine if any damage has occurred to make the
lift inoperable. If the aerial lift is operable and the
situation allows safe operation from the lower
controls, move the platform away from the danger
and into the safest clear path of descent to get the
operator on the ground. See “Control Selector”, at
the beginning of this chapter, for specific instructions
on overriding the upper controls. If the aerial lift is not
operable, use another aerial lift to rescue the operator
from the platform or consider one of the other
emergency procedures in this chapter.
HYDRAULIC LINE FAILURE - Hydraulic line failure
during aerial lift operation presents numerous
hazards. Be aware that hydraulic oil mist caused by
a leak or hydraulic line failure is conductive even
though a non-conductive oil is used.
DANGER:
AVOID HIGH PRESSURE
HYDRAULIC OIL SPRAY. THIS SPRAY OR MIST
CAN PUNCTURE AND BECOME EMBEDDED
BENEATH THE SKIN OR CONTAMINATE THE
EYES. THESE CONDITIONS REQUIRE
IMMEDIATE MEDICAL ATTENTION.
A hydraulic line leak will create a slippery surface
which is potentially hazardous. When a hydraulic
leak is encountered it must be repaired by the proper
service personnel and the unit should be cleaned of
excess hydraulic oil. If a hydraulic leak is not
repaired the oil in the reservoir will be depleted and
pump damage may occur. Most hydraulic oils are
flammable and bodily contact with hot oil is
dangerous. The operator and the ground crew must be
alert for these hazards to avoid injury.
DANGER:
AVOID ANY CONTACT
BETWEEN HYDRAULIC OIL AND SOURCES OF
HIGH HEAT OR OPEN FLAMES. DEATH OR
SERIOUS INJURY MAY RESULT FROM A FIRE.
WARNING:
CONTACT WITH HOT
HYDRAULIC OIL MAY CAUSE SERIOUS BURNS
WHICH REQUIRE IMMEDIATE MEDICAL
ATTENTION.
A quick response to hydraulic line failure is
important if the operator is to be safely removed from
the platform. A quick response can simplify the steps
required to lower the platform and remove the
operator. The following examples describe some
emergency operating procedure for typical hydraulic
line failures.
1. The Versalift aerial lift design uses holding
valves to lock the booms in position in the
event of a hydraulic line failure. If there is a
continuous loss of hydraulic oil from the aerial
lift, operate the hydraulic power source only
while attempting to stow the aerial lift to
conserve the hydraulic oil supply. If operation of
the aerial lift is impossible, use the bleeder ports
and manual rotation.
2. A hydraulic line failure located between the
upper and lower controls may temporarily allow
the continued operation of the aerial lift. The
rate of the hydraulic oil loss can be reduced by
overriding the upper controls and operating the
aerial lift with the lower controls. If the oil
supply is depleted, discontinue operation of the
hydraulic power source to avoid damage to the
hydraulic pump. If the aerial lift is inoperable,
use the bleeder ports and manual rotation.
ENGINE FAILURE - If the prime power source fails,
the optional backup pump system can be used for
emergency operation. If this system is not installed,
use the engine start/stop control to crank the engine,
as previously explained. The bleeder ports and
manual rotation must be used if these systems are not
installed.
HYDRAULIC PUMP FAILURE - If the primary
hydraulic pump fails use the backup pump system (if
equipped) or the bleeder ports and manual rotation.