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Typical Double Air Clutch Functions
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A four-way, exhausted center valve can control any two air clutch functions. In center, or neutral handle position, both air clutches are released and either can be engaged by moving the handle to one side or the other. This four way valve action produces a mutually exclusive interlock function, in that both clutches cannot be engaged at the same time. Two clutch functions are also combined into one valve handle for operator convenience. Both DIRECTIONAL control and PRESSURE CONTROL four-way valves may be used. Some typical double clutch functions are listed below:
- High/Low Drum Clutches (See circuit on following page)
- Rotary clutch and Breakout cathead
- Master clutch and Neutral brake
- Rotary clutch and Inertia brake
- Forward and Reverse functions
- Auxiliary winch raise and lower
The choice of valve handle actions is the same as the single air clutch functions described above.
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