Versalift VST-8000-I, Руководство оператора

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5-2 39026-03 02/17 VERSALIFT VST-8000/8500/9000/9500-I
EMERGENCY
OPERA
TION
MANUAL ROTATION - If all the hydraulic power
sources becomes inoperable, the lift rotation system
can be operated manually. Before manual rotation
is attempted, remove the plugs from the motor test
ports on the dual counter-balance valve manifold
located on the rotation motor (Figure 5.4). This
allows oil to be piloted during rotation of the lift. Be
prepared for a fl ow of oil escaping from the motor test
ports. Rotate the lift by using a 7/8 in. hex socket
and a ratchet to rotate the input shaft on the gearbox.
(Figure 5.5) Actuating the lower rotation control lever
will reduce the eff ort required to rotate the lift.
If manual rotation is used, test port plugs must be
replaced on counter-balance valve manifold. See
“Responsibilities after Emergency Operation” at the
end of the section.
Test Port Plugs
Figure 5.4
Manual Rotation
Figure 5.5
OUTRIGGER BOOM INTERLOCK MANUAL
OVERRIDE –
In the event of diverter valve failure,
and the lift becomes inoperable with an operator
aloft, the outrigger boom interlock selector can
be overridden to lower the booms and return the
operator to the ground. To activate the manual
override, locate the solenoid operated 3-way valve,
usually in the pedestal. On the end of the valve,
there is a small tab (Fig. A) which can be pressed
with a small screwdriver, capscrew, etc. With this tab
pressed down, hydraulic fl ow will be diverted from
the outriggers to the lift. Another operator can then
operate the lower controls to lower the booms.
WARNING:
USE OF MANUAL OVERRIDE
TO O P E R AT E T H E L I F T W I T H O U T T H E
OUTRIGGERS DEPLOYED CAN RESULT IN
SERIOUS INJURY OR DEATH.
Outrigger Boom Interlock Manual Rotation
Figure 5.6
BACKUP PUMP (Optional) - The backup pump
system provides hydraulic power from a DC pump-
motor for emergency operation of the lift in the event
of a prime power source failure.
The backup pump system should not be operated
longer than 30 seconds continuously.
Continuous
use will drain the battery and damage (over heat) the
backup pump motor.
At the upper controls,
the backup pump is operated
by an air cylinder. To activate this system push the
air cylinder plunger knob and hold it while operating
the upper control. To turn off the backup pump
release the plunger knob and allow it to return to
the neutral position.
At the lower controls,
the backup pump is operated
by a detented toggle switch. To activate this system
move the toggle to the “ON” position and operate the
appropriate control levers. To turn off the backup
pump return the toggle switch to the “STOP” position.
ENGINE START/STOP CONTROL - The engine
start/stop control can be used for emergency
operation if the truck engine (PTO models) or the
generator engine will not stay running. Operate the
aerial lift only while attempting to lower the booms.
To conserve the battery and prevent damage to