Tanco 1510, Operator'S Handbook Manual

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37
Tanco Autowrap 1514-1510
Operator’s manual
14.1 Entry Block
This block is flange mounted onto the control block. It contains the following valves.
V1 V2
V4
V3 Compensator
V1 Flow control valve.
The entry block is designed to take an inlet flow of up to 90 l/min. This valve works with the
compensator valve to regulate the flow to the machine to 30 l/min. Please note that all valves
have been set in the factory and should not be adjusted except by trained technicians.
V2
Flow control valve.
This valve should normally be set fully open to allow the compensator to work. When set for
Load sensing this should be screwed fully closed.
V3 Pressure relief valve
In the event of the oil coming against a dead head this valve opens allowing oil back to tank.
This is set in the factory to be 185 bar and should not be tampered with.
V4
Master valve (Electric cable number 7.)
Electric valve. When the machine is running idly, this valve remains open and the oil circulates
constantly from and to the tractor. As soon as one of the control box functions is selected, this
valve will close and simultaneously open the LC valve for the particular function.
Manual overide for open/closed center
Open center hydraulics
Most tractors have an oil pump which produces a fixed volume per revolution. For these tractors
the selector valve must be in the open position. (See section 4.10.) If no other function is
activated, the oil flows from the tractor, through the oil filter, the selector valve the circulation
valve and back to the tractor.
As soon as a function button is pressed on the control box, the circulation valve, V3, will close
the oil circuit and at the same time open the valve for the selected function.
Closed center hydraulics
For tractors with variable oil pumps, for example older John Deere’s, the master valve must be
in the closed position. (See section 4.10.) To do this push and twist the manual override on top
of the master valve.
With this setting the oil can only enter the control block when one of the functions has been
selected.