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SECTION 7
SYSTEMS
7 LIFT SYSTEMS
The MULTIBENCH is electrohydraulically operated.The main source of energy is electricity, supplied from the mains
in the bodyshop where it is installed.The lift is hydraulically powered by means of a gear pump.The lift pull bar is
hydraulically powered by a hydraulic-pneumatic piston pump, which is supplied with compressed air coming from the
bodyshop distribution system, or an external accumulation unit (not supplied).
7.1 LIFT HYDraULIC DIaGraM
The operating diagram of the MULTIBENCH hydraulic
system consists of a circuit with the following main
components:
1)
Lift control gear pump.
2)
Three-phase electric motor.
3)
Main pressure relief valve.
4)
Motor-pump coupling joint.
5)
Suction filter.
6)
Unidirectional valve.
7)
Quick-fit pressure gauge connection.
8)
Flow control valve.
9)
2-way/2-position
solenoid
control.
10) Safety lock valve (against pipe breakage).
11) Single-acting pair of jacks for lift control.
12) Control unit tank.
13) Electrohydraulic unit.
• OPERATION
By enabling the ascent control, the electric motor (2)
rotates the pump (1); the oil under pressure is conveyed to
the plunger chambers of the pair of jacks (11) and passes
through the lock valve (10) thus raising the mobile platform.
The lift is lowered by means of the solenoid valve (9) which
connects the main duct to the outlet, thus allowing the oil to
flow into the tank (12).
The flow control valve (8) controls the flow of oil from the
jacks, thus keeping the descent speed within the limits
provided for by the manufacturer.
The main pressure relief valve (3) prevents the pressure
exceeding the value established by the manufacturer.
The relief valve must not be tampered with for any reason:
WarNING! alteration of the relief valve will
seriously damage the MULTIBENCH: SPaNESI
S.p.a. declines all responsibility for injury to
persons and animals or damage to property
due to alteration of the valve.
iMinibench Maxi
valve,
ascent/descent
67
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