spanesi PONYBENCH BEPLUS, Operating And Service Manual

Page: 78 / 242

78
GB
SECTION 5
SAFETY DEVICES
5 SAFETY DEVICES
The PONYBENCH-B is provided with several safety
devices for protecting the operator.
WARNING! The following devices must
under no circumstances be tampered with or
removed. They must be regularly checked and
always kept in perfect working order.
The following safety devices have been installed to ensure
that the operator always works in complete safety under
all conditions.
• NON-RETURN MECHANICAL SAFETY DEVICE
• EMERGENCY STOP BUTTON
• SAFETY LOCK VALVE
• RESET BUTTON
• MAGNETO-THERMAL OVERLOAD CUTOUT
• LOW VOLTAGE CONTROLS ELECTRICAL
CIRCUIT
• SAFETY WARNING SIGNS
5.1 NON-RETURN MECHANICAL SAFETY
DEVICE
This prevents the descent of the lift even in the event of a
breakdown in the lifting system or whenever intervention
must be made on the hydraulic jack.
The system consists of a movable hook controlled by
a pneumatic cylinder which automatically stops in the
safety stops at the base of the lift. The operator is obliged
to always position the lift in <safe> before performing
operations on the vehicle.
5.2 EMERGENCY STOP BUTTON
When pressed, it stops all movements instantly. After being
pressed, it remains locked in position by the mechanical
self-retaining device.
5.3 SAFETY LOCK VALVE
It prevents the lift from coming down in the event of
breakage of the delivery fl exible pipe that connects the
lifting jacks to the electro-hydraulic unit. This valve is of the
<normally open> type and positioned directly on the mouth
of the liner of the jack upstream from the connection to the
fl exible pipe that connects the jack to the electro-hydraulic
unit and automatically intervenes whenever for any reason
a strong pressure difference is created between the valve
inlet and outlet mouths, such as when a fl exible pipe
suddenly breaks.
DANGER! Alteration of the safety lock
valve poses a serious risk to the safety of
the operator and the structural integrity of
the PONYBENCH-B lift and automatically
invalidates the warranty.
5.4 RESET BUTTON (PONYBENCH BEPLUS
only)
It prevents movement when there is a power failure for any
reason or when the emergency button has been pressed.
Once the emergency button has been released, the reset
button restores power to the control unit.
5.5 LOW VOLTAGE CONTROLS ELECTRICAL
CIRCUIT (PONYBENCH BEPLUS only)
It minimises electrical risks during use of the push-button
panel. It consists of a safety transformer, which lowers the
voltage of the auxiliary circuit powering the control console
to 24 V AC.
5.6 MAGNETO-THERMAL OVERLOAD CUTOUT
(PONYBENCH BEPLUS only)
It cuts off the power supply to the electric motor terminals in
the event of motor overload and/or overheating. It consists
of a magneto-thermal contactor set to the electrical input
value established by the motor manufacturer.
5.7 SAFETY WARNING SIGNS
They indicate a danger, a prohibition or directions to be
followed to ensure operator safety and correct operation of
the PONYBENCH-B.