A rotary vane apparatus (AA) where the rotor (90) has a rotational axis (29) and carries at least one vane (140) which is supported by a vane guide apparatus (100,110) for rotation about a stator axis (12) which is spaced from the rotor axis a preselected amount and where both the rotor and vane have axial flat surfaces (91,92,140L,140R) which are rotated adjacent to stationary flat surfaces (25AA,45AA) of a stator or stator endplates, the invention provides axial adjustment (107,117) of the vane with respect to the flat surface of the stator endplates and independently provides an adjustment (80,80A) of the rotor end surfaces with respect to the stator end surfaces.
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