Cradle-mounted swash with trunnion-mounted positioning arms

A pump comprising:

• a swash block having a first curved support surface and a second curved support surface disposed on an exterior surface of the swash block;
• a first trunnion arm mounted to the swash block and extending from a first side of the swash block;
• a second trunnion arm mounted to the swash block and extending from a second side of the swash block opposite the first side;
• a housing defining:
• (i) an internal chamber in which the swash block is disposed, wherein the internal chamber includes a first curved bushing and a second curved bushing, (ii) a first bore, wherein the first trunnion arm is rotatably mounted through the first bore, and (iii) a second bore, wherein the second trunnion arm is rotatably mounted through the second bore, such that the swash block is supported at the first bore and the second bore, wherein the first curved bushing interfaces with the first curved support surface and the second curved bushing interfaces with the second curved support surface;
• and
• a locator bushing disposed between the first trunnion arm and the first bore, wherein the locator bushing has a curved exterior peripheral surface and a flat interior surface, and wherein the flat interior surface of the locator bushing is coupled to a corresponding flat exterior surface of the first trunnion arm.

A hydrostatic transmission comprising:

• a motor section housing a motor rotatable by fluid;
• and
• a pump section coupled to the motor section and configured to provide the fluid to the motor, wherein the pump section includes:
• a swash block mounted to a first trunnion arm extending from a first side of the swash block and a second trunnion arm extending from a second side of the swash block opposite the first side, wherein the swash block has a first curved support surface and a second curved support surface disposed on an exterior surface of the swash block,
• a housing comprising (i) a first bore, (ii) a second bore, and (iii) an internal chamber having a first curved bushing and a second curved bushing, wherein the swash block is supported within the internal chamber of the housing by the first trunnion arm being positioned in the first bore of the housing, the second trunnion arm being positioned in the second bore of the housing, the first curved support surface being positioned against the first curved bushing of the housing, and the second curved support surface being positioned against the second curved bushing of the housing, and
• a locator bushing disposed between the first trunnion arm and the first bore, wherein the locator bushing is double half-moon shaped that defines a curved exterior peripheral surface and a flat interior surface, wherein the flat interior surface is coupled to a corresponding flat exterior surface of the first trunnion arm.