Mechanical Selective Control Valves - Function Mode Adjusting

LX1056953-UN-31OCT14

Series 450 Selective Control Valve

A - Lock Function 1

B - Lock Function 2

C - No Lock Function

The tractor can be equipped with Series 200 and/or Series 450 selective control valves.

The 200 and 450 Series selective control valves provide the functions “raise”, “lower”, “float position”, plus a lock function (A).

The lock function (A) holds the control lever in the “raise” or “lower” position until it is moved manually.

The 450 Series selective control valve also have an additional lock function (B), which holds the control lever in the “raise” or “lower” position until the pressure in the oil circuit has reached a predetermined value (e.g. when the hydraulic cylinder has reached its end position).

Neither locking function is activated in position (C). The control lever returns to neutral as soon as it is released.

If an implement (e.g. hydraulic cylinder) is connected, the pressure connection (e.g. extending cylinder) has to be connected to the lower coupler. With 200 Series selective control valves, a valve prevents sudden loss of pressure caused by leakage (e.g. retracting cylinder) when the engine is shut off. On 450 Series selective control valves, the likelihood of leakage is further diminished.