Cub Cadet 7530 Operator's Manual page 71

A hydraulic block is located on the right side of the tractor. This block can
provide an external hydraulic circuit for loader use or other applications.
See your dealer.
HYDRAULIC HYDRAULIC
BLOCK BLOCK
IMPORTANT: Never park a tractor with an implement in the raised position.
Moving the control lever forward will lower the implement even though the
engine is not running. If it is necessary to service the implement in the raised
position, use jack stands to safely block the implement in place. Put the
hydraulic flow control knob in the LOCK position.
IMPORTANT: Whenever the shut off plate is set at the "S" position, never
plug the inlet and outlet of the Hydraulic block. Change the set position of
shut - off plate to "O" position, if the remote attachment is not installed.
Failure to do so will cause damage to the hydraulic system.
HYDRAULIC BLOCK
63
FIELD OPERATION