Time Versalift SST-37-EIH, Operator'S Manual

Page: 43 / 51

5-1 28009-09 09/16 VERSALIFT SST-37/40-EIH
EMERGENCY
OPERA
TION
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 fi rst
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 operation from the lower controls,
the upper controls may be overridden through the
use of the selector handle. Move the selector handle
in the “lower” position and move the desired control
handle to allow operation from the lower controls.
This renders the upper controls inoperable.
HOLDING VALVES - If all the hydraulic power
sources become inoperable the booms can be
lowered using the set screw on the holding valve
located at the cylinders. The boom will drift down as
the hydraulic oil passes through the holding valve.
The speed of the boom’s, descent will increase as the
set screw is turned clockwise. Manual adjustment
of the setscrew on the holding valve can only be
used in lowering the boom. When the holding valve
setscrew is used to lower the boom, replacement
of the holding valve is required before further use.
DANGER:
M A K E C E RTA I N A L L
BODY PARTS ARE CLEAR OF THE PATH OF
BOOM TRAVEL BEFORE ATTEMPTING TO
LOWER THE BOOM USING THE SETSCREW ON
THE HOLDING VALVE. FAILING TO DO SO MAY
CAUSE SERIOUS INJURY OR DEATH.
To retract the inner boom, lower the outer boom, or
lower the lower boom, carefully loosen the jamnut
EMERGENCY OPERATION
(counter-clockwise), with a 9/16 in. wrench, on the
appropriate holding valve as shown in the following
fi gures. Slowly turn the setscrew clockwise (using
5/32 in. hex) until movement begins. To stop boom
movement, turn the setscrew counterclockwise.
Holding Valve Lowering Procedure
(Extension Cylinder)
Figure 5.1
Holding Valve Lowering Procedure
(Outer Boom Cylinder)
Figure 5.2
Holding Valve Lowering Procedure
(Lower Boom Cylinder)
Figure 5.3
MANUAL ROTATION - If all the hydraulic power
sources becomes inoperable, the lift rotation system
can be operated manually. Use the hex socket
extension on the gearbox input shaft to manually
align the boom with the cradle. Actuating the lower
rotation control will reduce the eff ort required for
rotation of the aerial lift. See Figure 5.4.