The direction of rotation is always determined WHEN FACING THE SHAFT. This rule applies for the pump shaft and the drive shaft. Ace Frame Mounted pumps are available in both clockwise (CW) and counterclockwise (CCW) rotation. Ace model numbers which include a “CW” have a clockwise rotation; all other models are counterclockwise rotation.
When direct coupling shafts, always MATCH THE OPPOSITE ROTATION pump with the shaft. As illustrated, a gasoline engine with CCW rotation will direct couple to a FMC-CW-800 pump with clockwise rotation. When mounting a pump with belts and pulleys, either pump rotation can be used to match the drive shaft rotation and the desired direction of the pump.
The rotation of several common power sources are as follows: Gasoline engine and electric motor shafts rotate in a counterclockwise direction; a tractor PTO shaft rotates in a clockwise direction; the front tractor engine crankshaft rotates in a counterclockwise direction.