20
4.4.2 Multi-way valve (Fig.4-13)
The multi-way valve uses 2PC type. The hydraulic oil from the working pump distributes the high pressure oil
into the lifting cylinder or tilt cylinder through the control of multi-way valve rod. Inside there are the safety
valve and self-lock valve. The safety valve is set at the oil inlet of multi-way valve. The upper side of opening
can control the system pressure and the adjusted pressure FE10-13: 14.5MPa, FB16-20: 17.5Mpa. The self-lock
valve is set on the tilt valve, which is mainly purposed to prevent the tilt cylinder from serious consequence due
to misoperation of joystick in case of no pressure source. By use of the tilting self-lock valve, the mast will not
tilt forward even though the joystick is sharply pushed, when the oil pump is out of service.
Fig.4-13 Profile drawing of multi-way valve
Pressure adjustment of multi-way valve:
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General