A heavy-duty take-off (P.T.O.) is provided to transmit engine power to the blower and compressor. The
power take-off contains and over-center type clutch, which is manually engaged or disengaged by,
means of a handle. During all normal operations, to P.T.O. clutch is left engaged. However, it may be
disengaged for engine tune-up and maintenance. The P.T.O. clutch should be engaged with engine
operating at idle to assure proper alignment of the clutch facing. Engaging the clutch while the engine is
at rest will cause misalignment and result in premature wear. Engaging the clutch at high rpm will glaze
the friction plates and cause damage.