The pneumatic circuit shown in the illustration is part of a complex large low-speed engine control system. Which of the following statements describes the function of this circuit? Illustration MO-0117

Question

Accepted Answer

Valve D, when depressed, allows the retained pneumatic pressure within the shutdown servomotor to be relieved.

Answer

The piston labeled A provides a low-pressure signal to the other components illustrated.

Answer

The circuit shown is used to shift the camshaft position when reversing the engine.

Answer

When oil pressure to valve C is diminished, a pressure decrease is developed at valve D, causing it to shift, and nullifying the actuating signal to device A.

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