Versalift VST-36-I, Руководство пользователя

Страница: 54 / 62

5-2 39014-03 06/16 VERSALIFT VST-36/40/47/52-I
EMERGENCY
OPERA
TION
MANUAL ROTATION - The rotation system can be
operated manually if the hydraulic system becomes
inoperable. 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 5.5). This allows oil to be
piloted during rotation of the lift. Be prepared for a
flow of oil escaping from the motor test ports. Rotate
the lift using a 7/8 in. hex socket and ratchet to turn
the input shaft on the gearbox (Figure 5.6). Actuating
the lower rotation control lever will reduce the effort
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 this chapter.
Test Port Plugs
Figure 5.5
Manual Rotation
Figure 5.6
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 flow 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 OPERATE THE LIFT WITHOUT
THE OUTRIGGERS DEPLOYED CAN RESULT IN
SERIOUS INJURY OR DEATH.
Outrigger Boom Interlock Manual Rotation
Figure 5.7
BACKUP PUMP (Option) - 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
the 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