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A fixed displacement pump includes a housing having a cavity, an inlet, and an end cap with alignment portions therein. A cam ring pivotally associated within the cavity includes adjustment portions. The cam ring is aligned in a fixed position via a pin inserted through both a select adjustment port

A fixed displacement pump includes a housing having a cavity, an inlet, and an end cap with alignment portions therein. A cam ring pivotally associated within the cavity includes adjustment portions. The cam ring is aligned in a fixed position via a pin inserted through both a select adjustment portion and a corresponding alignment portion. The adjustment portion selected determines both rotational direction and displacement of the pump. The cam ring also includes recesses positioned adjacent the inlet to facilitate porting of fluid through the pump. A rotor mounted within the cam ring includes roller slots having groove segments. The groove segments are positioned in an arcuate arrangement about the rotor to facilitate porting of fluid through the pump. The rotor also includes undercut portions positioned between the roller slots in an arcuate arrangement on an outer edge of the rotor to facilitate porting of fluid through the pump.

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1. A fixed displacement hydraulic pump, comprising:a housing having a cavity and a plurality of alignment portions; a cam ring positioned in the cavity and pivotally associated with the housing, the cam ring having a plurality of adjustment portions; and wherein while the pump is assembled the adjus

1. A fixed displacement hydraulic pump, comprising:a housing having a cavity and a plurality of alignment portions; a cam ring positioned in the cavity and pivotally associated with the housing, the cam ring having a plurality of adjustment portions; and wherein while the pump is assembled the adjustment portions are adapted to eccentrically align the cam ring in a permanently fixed position within the cavity by a select adjustment portion registering with a corresponding alignment portion of the housing. 2. The pump of claim 1, wherein only one adjustment portion and one alignment portion can be simultaneously registered.3. The pump of claim 1, wherein adjustment portions provide for the selection between clockwise and counterclockwise rotation of the rotor.4. The pump of claim 1, wherein adjustment portions provide for the selection between a first amount of fluid displacement and a second amount of fluid displacement greater than the first amount.5. The pump of claim 1, wherein the adjustment portions and alignment portions are holes, and the select adjustment portion is engaged to the corresponding alignment portion by a pin inserted through both the select adjustment portion and the corresponding alignment portion.6. The pump of claim 5, wherein the housing includes an end cap and a cover affixed to the end cap, the cavity being formed between the end cap and cover, and wherein the alignment portions are holes formed in the end cap of the housing.7. The pump of claim 1, wherein the pump is a roller vane pump, further comprising a rotor rotatably mounted within the cam ring, the rotor having a plurality of roller slots for receiving rollers.8. The pump of claim 7, wherein the roller slots include groove segments positioned in an arcuate arrangement about the rotor facilitating the porting of hydraulic fluid through the pump.9. The pump of claim 7, wherein the rotor includes undercut portions positioned in an arcuate arrangement between the roller slots on an outer edge of rotor facilitating the porting of hydraulic fluid through the pump.10. The pump of claim 1, wherein the pump has a fluid inlet and outlet, the cam ring has an outer and inner face, and a recess on each face of the cam ring positioned adjacent to the fluid inlet of the pump.11. The pump of claim 10, wherein the adjustment portions and the recesses are located in the same portion of the cam ring.12. A fixed displacement hydraulic pump, comprising:a housing having a cavity and a plurality of alignment portions; a cam ring positioned in the cavity and pivotally associated with the housing, the cam ring having a plurality of adjustment portions; wherein the adjustment portions are adapted to eccentrically align the cam ring in a fixed position within the cavity by a select adjustment portion registering with a corresponding alignment portion of the housing; and wherein the adjustment portions and alignment portions are holes, and the select adjustment portion is engaged to the corresponding alignment portion by a pin inserted through both the select adjustment portion and the corresponding alignment portion. 13. The pump of claim 12, wherein the housing includes an end cap and a cover affixed to the end cap, the cavity being formed between the end cap and cover, and wherein the alignment portions are holes formed in the end cap of the housing.14. A fixed displacement roller vane hydraulic pump, comprising:a housing having a cavity therein; a cam ring positioned in the cavity; a rotor rotatably mounted within the cam ring, the rotor having a plurality of roller slots for receiving rollers, wherein the roller slots include groove segments positioned in an arcuate arrangement about the rotor facilitating the porting of hydraulic fluid through the pump; wherein the rotor includes undercut portions positioned in an arcuate arrangement between the roller slots on an outer edge of rotor facilitating the porting of hydraulic fluid through the pump; and wherein the housing includes a plurality of alignment portions, the cam ring is pivotly associated with the housing and has a purality of adjustment portions, the adjustment portions are adapted to eccentrically align the cam ring in a fixed position within the cavity by a select adjustment portion registering with a corresponding alignment portion of the housing, and wherein only one adjustment portion and one alignment portion can be simultaneously registered; and wherein the housing includes and end cap and a cover affixed to the end cap, the cavity being formed between the end cap and cover wherein the alignment portions are holes formed in the end cap of the housing, wherein the adjustment portions are holes formed in the cain ring, and the select adjustment portion is engaged to the corresponding alignment by a pin inserted through both the select adjustment portion and the corresponding alignment portion. 15. The pump of claim 14, wherein adjustment portions provide for the selection between clockwise and counterclockwise rotation of the rotor.16. The pump of claim 14, wherein adjustment portions provide for the selection between a first amount of fluid displacement and a second amount of fluid displacement greater than the first amount.17. The pump of claim 14, wherein the pump has a fluid inlet and outlet, the cam ring has an outer and inner face, and a recess on each face of the cam ring positioned adjacent to the fluid inlet of the pump.