Using A Hydraulic Valve As A Single-Action Valve - Valtra T144 Operator's Manual

3. Operation
4. Activate the floating positions on the needed valves.
NOTE: Make sure there is no load on valves as the load will come down
when setting the valves to the floating position.
The valves go to the floating position, and the pressure exhausts from the
quick couplings.
5. Stop the engine.
6. Deactivate the floating position on the needed valves.
7. Attach or release the quick couplings.
IMPORTANT: Use only couplings that comply with the standards.
IMPORTANT: Clean the quick couplings thoroughly before attaching any
auxiliary hydraulic equipment. The caps on the couplings must be fitted when
the auxiliary equipment is not attached.
NOTE: When attaching implements to the auxiliary hydraulics, connect the
return coupling of the implement to the return coupling of the tractor.
NOTE: Make sure that the quick coupling does not leak after disconnecting
the hose.
8. Start the engine.
3.14.3.2

Using a hydraulic valve as a single-action valve

You can use a hydraulic valve as a single-action valve for tipping, for example.
When using a hydraulic valve as a single-action valve, connect the hose of the
tipping device to the (+) coupling of the used valve.
1. To set pressure to the working device, move the respective valve control
lever to the (+) direction.
The tipping device moves up.
2. To remove the pressure from the working device, move the respective valve
control lever to the (-) direction.
You can also use the floating position for this action. This way you do not
pressurise the hydraulic pump.
The tipping device moves down.
WARNING: Before connecting or disconnecting the quick
couplings, adjust the valves into the floating position (the tractor
has to be running and the parking brake engaged).
DANGER: When connecting auxiliary cylinders and hydraulic
motors, ensure that the hoses are attached to the correct
couplings. If you attach the hoses incorrectly, the functions are
reversed.
WARNING: Do not transport anything on the auxiliary hydraulic
valves while driving on the road. The load, trailer link steering and
such have to be locked (for example mechanically).
WARNING: Make sure that the valve for tipping does not have the
position lock on.
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