Michco sc8000, Руководство по обслуживанию

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Recovery System 131 Service Manual – SC8000
Electrical Circuit Description
The Vacuum Fan Solenoid Valve
S1
controls the hydraulic oil flow to the fan motor. Note that
S1
is not a
proportional valve and is either on or off. The following conditions must be met for
S1
to energize and allow
hydraulic oil to flow to the vacuum fan motor:
• The
Driver Box
must receive a signal from the
Dashboard Panel
via the CAN Bus that the Operator has
actuated the recovery system.
• The
Driver Box
must receive a signal from the
Drive Pedal Sensor R1
that the drive pedal has been moved
from the neutral position.
• The
Recovery Full Switch S2
must be closed (recovery tank not full).
Recovery System Hydraulic Diagram
An electric solenoid,
S1
, controls the hydraulic
Vac Fan Control Valve
(L1) which controls the hydraulic oil flow
to the vacuum fan motor.
Vacuum Fan Off
In the normally-off condition, the
S1
Vacuum Fan Control Valve
is de-energized
(
Solenoid Off
). This allows the hydraulic
oil to flow from the
Aux.
(auxiliary)
Pump
through
S1
to the
Filter
and
Propulsion
Pump Charge Port
, bypassing the
Vacuum
Fan
motor.
Vacuum Fan
Aux. Pump
Reservoir
Return through
Filter to
Propulsion Pump
Charge Port
Pressure Relief
Valve
S1 Vac Fan Control Valve
Solenoid
Off