Selective Control Valves

LX1045795-UN-22DEC10

A - Lock function 1

B - Lock function 2

C - No lock function

The tractor may be equipped with different types of selective control valves:

• Series 100, Series 200 or Series 450

• Series 100, Series 200, Series 300 or Series 350

100 Series control valves provide the functions raise and lower plus a float position.

Besides these functions, 200 Series control valves provide a lock function (A) that holds the control lever in the raised or lowered position until it is moved manually.

300, 350 and 450 Series control valves also have an additional lock function (B), which holds the control lever in the raised or lowered 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 and 300 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 350 and 450 Series selective control valves, the likelihood of leakage is further diminished. 100 Series selective control valves are NOT equipped with such a valve.