spanesi PONYBENCH BEPLUS, Operating And Service Manual, Page: 80 / 242

80
GB
SECTION 7
SYSTEMS
7 SYSTEMS
The PONYBENCH BEPLUS is electro-hydraulically operated, while the PONYBENCH BPPLUS is pneumatic-
hydraulically powered.The power supply is electricity for the former and compressed air for the latter. Both power
supplies are distributed by the networks existing in the bodyshop. The lift is raised up and down by gear pump in the
PONYBENCH BEPLUS version and by a pneumatic-hydraulic piston pump in the PONYBENCH BPPLUS version.
7.1 PONYBENCH BEPLUS LIFT HYDRAULIC DIAGRAM
The operating diagram of the PONYBENCH BEPLUS hydraulic system consists of a circuit with the following main
components:
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1) Lift control gear pump
2) Electric motor
3) Main pressure relief valve
4) Pump/motor coupling
5) Suction fi lter
6) Unidirectional valve
7) Quick fi t pressure gauge connection
8) Flow control valve
9) 2-way/2-position solenoid valve, ascent/descent
control
10) Safety lock valve (against pipe breakage)
11) Single-acting jack 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 chamber of the jack (11) and passes through
the safety lock valve (10), thus raising the movable
platform.
When the lift must be lowered, the solenoid-valve (9)
is energised and connects the air duct to the outlet,
permitting the oil to fl ow to the tank (12). The fl ow control
valve (8) controls the fl ow 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
from exceeding the value established by the manufacturer.
The main pressure relief valve (3) must not be tampered
with for any reason.
WARNING! Alteration of the relief valve
will seriously damage the PONYBENCH-B.
SPANESI S.p.A. declines all responsibility for
injury to persons and animals or damage to
property due to alteration of this valve.