A pump having a symmetric end cap is disclosed. The end cap is attachable in a first position or a second position wherein the second position is rotated relative to the housing. A trunnion arm extends in a first direction and a system port opens in a first orientation when the housing is connected to the end cap in a first position. The end cap includes structure such that the housing may be connected in a second position so that the trunnion arm extends in a second direction while maintaining the system port opening in the first orientation. The end cap may be provided with a symmetric porting system. A control device for affecting movement of the swashplate is disclosed. Methods of locking the swash plate into a predetermined position are also taught.
CROSS-REFERENCE TO RELATED APPLICATION
This patent application is a continuation of application Ser. No. 10/644,520, filed on Aug. 20, 2003, now U.S. Pat. No. 6,889,595 which is a continuation of Ser. No. 10/330,939, filed Dec. 27, 2002, now U.S. Pat. No. 6,694,729, which is a continuation of application Ser. No. 09/798,392, filed Mar. 1, 2001, now U.S. Pat. No. 6,502,394, which is a continuation of U.S. patent application Ser. No. 09/354,850 filed Jul. 16, 1999, now U.S. Pat. No. 6,332,393.
A pump includes a pump housing and an end cap, which is attached to the pump housing at the top and has an oil suction port at one end and an oil relief port at one lateral side. A connecting cap is connectable to the end cap opposite to the pump housing in one of a number of positions in different directions and which has two ports cut through the two opposite ends thereof for letting in and out a fluid to/from a hydraulic motor. Two plugs are selectively fastened to one of the two ends of each of the two ports of the connecting cap to control the flow direction of the fluid passing to/from the hydraulic motor through the connecting cap.
