Valtra T144 Operator's Manual page 192

3. Operation
Valves
Three valves
Four valves
In adjustable valves, the position lock is always disengaged when the tractor
engine is shut down. This prevents unexpected hydraulic movement and
decreases the engine load during start. The basic valve 1 does not have this
function. The floating position stays engaged, regardless whether the tractor
engine is running or shut down.
The tractor is equipped with an auxiliary hydraulic return coupling 1/2" (12,5 mm).
When the front linkage has been connected to the rear valve, the tractor is
equipped with the front linkage shut-off valve.
Valve type Valve functions
Valve 1, basic Out - hold - in - floating
Position locks on floating
and (+)-port
Valve 2, basic Out - hold - in - floating
Position lock on floating
Valve 3, adjustable Position lock - spring-
return - kick-out
Valve 1, basic Out - hold - in - floating
Position locks on floating
and (+)-port
Valve 2, basic Out - hold - in - floating
Position lock on floating
Valve 3, adjustable Position lock - spring-
return - kick-out
Valve 4, adjustable Position lock - spring-
return - kick-out
- 190 -
Flow control adjustment
N/A
N/A
In cabin
N/A
N/A
In valve 3
In cabin