Tanco Autowrap 1300 M, Руководство оператора

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29
Tanco Autowrap 1300 S
Operator’s manual
13.0 DESCRIPTION OF HYDRAULICS.
Fig. 13-1
Safety Valve
Wrapping Arm Speed
Control Valve
Bale Rotation Speed
Control Valve
R+
Connect to D/A Service
R-
Cutter Diverter Valve
P
T (MUST BE FREE RETURN)
13.1
"OPEN / CLOSED CENTER" HYDRAULIC.
The 1300 S machine uses the tractors own remote valves to operate the functions on the
machine so no alteration is required to the machine to operate with ‘open or closed ‘ hydraulic
systems.
For the 1300 SM a special plug must be fitted to the valve to operate efficiently. See parts list.
13.2 THE CUTTER.
The film cutter is opened by hydraulic pressure from the tractor and is closed with oil pressure
from a hydraulic accumulator.
To open the cutter the oil supply that normally turns the wrapping arm is diverted by an electric
diverter valve through a restrictor and opens a line to the cutter. This puts the arm into slow
speed and generates sufficient pressure to override the accumulator and so the cutter opens.
The accumulator closes the cutter when the tractor spool valve is put back into the neutral
position. This is why the return hose from this service must be connected to a free return to tank,
it must be possible for oil to return even the tractor valve is in the neutral position.
13.3 The hydraulic system depends on the pressure relief valve of the tractor for over pressure
protection. The machine should therefore not be connected to a tractor with a relief valve setting
exceeding 200 Bar.