ACTUATOR GP-GOVERNOR 2744714 - Caterpillar

Construction
Illustration 1 g00471227
Main pumps (1) Port (negative flow control pressure) (2) Outlet port (pilot pump) (3) Upper pump (4) Outlet port (upper pump) (5) Inlet port (6) Port (power shift pressure) (7) Port (negative flow control pressure) (8) Lower pump (9) Outlet port (lower pump) (10) Housing (11) Pilot pump The main pumps consist of upper pump (3) and lower pump (8). The main pumps and the port block are bolted together in order to form one assembly. The front pump and the rear pump are identical in construction, identical in operation and identical control systems. Oil from the hydraulic tank flows into inlet port (5) of the port block. Upper pump (3) delivers oil through outlet port (4). Lower pump (8) delivers oil through outlet port (9). Pilot pump (11) draws oil through inlet port (5). Pilot pump (11) delivers oil through outlet port (2) .The power shift pressure is determined by the electronic controller. The power shift pressure flows into the main pumps through port (6). The negative flow control pressure from the main control valve flows into upper pump (3) through port (1). The negative flow control pressure from the main control valve flows into lower pump (8) through port (7).
Illustration 2 g00471228
Main pumps (4) Outlet port (upper pump) (5) Inlet port (9) Outlet port (rear pump) (10) Housing (11) Pilot pump (12) Gear (pilot pump) (13) Plate (14) Pin (17) Regulator (18) Drive shaft (lower pump) (19) Center line (20) Trunnion (21) Housing (22) Center line (23) Gear (lower pump) (24) Piston (25) Cylinder (26) Valve plate (27) Piston (28) Gear (upper pump) (29) Shaft (upper pump) (30) Cylinder passage (31) Inlet passage (32) Inlet passage (33) Center hole (34) Outlet passage (35) Outlet passage (C) Radial direction (D) Radial directionUpper pump (3) and lower pump (8) are bent axial piston type pumps. The term "bent axial" describes the angular movement of the piston pump assembly. This movement is around the point of intersection of center lines (19) and (22). The output of the pumps changes depending on the angle of cylinder (25) .Drive shaft (18) of the lower pump is coupled with the engine flywheel. Gear (23) of drive shaft (18) engages with gear (28) of shaft (29). When shaft (18) is driven by the engine flywheel, shaft (29) is driven through a mechanical linkage. The mechanical linkage is between gear (23) and gear (28). The number of teeth on gears (23) and (28) are equal. Therefore, both pumps rotate at the same speed as the engine.Because gear (23) engages with gear (12) of the pilot pump, pilot pump (11) rotates with the main pumps.Main Pump Operation
Upper pump (3) and lower pump (8) are identical in operation. The lower pump is described below. The upper pump is similar to the lower pump.Drive shaft (18) is driven by the engine. Drive shaft (18) turns seven pistons (24). Therefore, angle cylinder (25) rotates. Angle cylinder (25) is in contact with valve plate (26). Angle cylinder (25) rotates