BRACKET AS 3156903 - Caterpillar

Illustration 1 g02556242
Torque Converter Drive
(1) Input flange
(2) Rotating housing
(3) One-way clutch
(4) Impeller
(5) Support assembly
(6) Inlet passage for converter oil
(7) Output hub
(8) Output shaft
(9) Outlet passage for converter oil
(10) Stator
(11) Turbine Note: The white arrows show the flow of oil while the black arrows show the flow of power.The torque converter is made up of an impeller (4), turbine (11), output hub (7), rotating housing (2) and a stator (10) with a one-way clutch (3). The one-way clutch holds the stator in place when the torque converter is used. The one-way clutch also allows the stator to rotate freely when the torque converter is not used.The torque converter is driven by the output gear of the transfer gears. Input flange (1), rotating housing (2) and impeller (4) are fastened together. These components are driven as a unit. Support assembly (5) is fastened to the No. 1 clutch housing of the transmission. Output hub (7) is connected by splines to the sun gear for the No. 1 clutch.The transmission is driven by the torque converter in REVERSE, FIRST, and SECOND speeds. The torque converter is not used in THIRD through EIGHTH speeds.
Table 1
Transmission Speed Torque Converter Drive Direct Drive
Reverse X
First gear X
Second gear X
Third gear X
Fourth gear X
Fifth gear X
Sixth gear X
Seventh gear X
Eighth gear X Torque Converter Drive
The output gear of the transfer gears rotates input flange (1). The input flange rotates housing (2) and impeller (4). Oil from the inlet relief valve for the torque converter goes into the torque converter through inlet passage (6) in the carrier for the stator. The oil is then sent to the impeller (4).The impeller directs the oil to the blades of turbine (11) and the flow of the oil causes the turbine to rotate. The turbine directs the oil to stator (10) and the turbine causes the stator to try to rotate in the opposite direction of the turbine. The movement of the stator causes rollers (13) of one-way clutch (3) to roll between stator (10) and the carrier for the stator. The action of the one-way clutch keeps the stator from rotating. The stator now directs most of the oil back to impeller (4). The remainder of the oil goes out of the torque converter through outlet passage (9). The oil that goes back to impeller (4) from stator (10) moves in the same direction as the rotation of the impeller.Turbine (11) rotates output hub (7). Power is sent through the output hub (7) to the input side of the transmission.One-Way Clutch
Splines connect stator (10) to cam (12). Cam (12) is rotated by the stator. Carrier (16) does not rotate.
Illustration 2 g02556256
Detail of One-Way Clutch
(12) Cam
(13) Rollers
(14) Springs
(15) Openings in cam
(16) Carrier The mechanical connection between cam (12) and carrier (16) is rollers (13). Rollers (13) are in openings (15) of cam (12). Springs (14) are also in openings (15). The left side of openings (15) is smaller than the right side of openings (15) because