HARNESS AS-SWITCH 2041686 - Caterpillar

Table 1
Operation Of The Torque Converter For Transmission Speed    
Transmission Speed     Torque Converter Drive     Direct Drive with an Engaged Lockup Clutch    
Reverse     X        
Neutral     X        
First     X     X    
Second         X    
Third         X    
Fourth         X    
Fifth         X    
Sixth         X    
Seventh (1)         X    
( 1 ) This speed is not used on the 771 models.Torque Converter Drive
Illustration 1 g00520075
(1) Rotating housing (2) Turbine (3) Impeller (4) Outlet passage (5) Output yoke (6) Hub (7) Output shaft (8) Stator (9) One-way clutchThe engine flywheel turns rotating housing (1) which turns impeller (3). The impeller directs the oil to the blades of turbine (2). This will cause the turbine to turn. The turbine directs the oil to stator (8). This causes the stator to try to turn in the opposite direction of the turbine. The movement of the stator causes the rollers of one-way clutch (9) to move between stator (8) and the carrier for the stator. The action of the one-way clutch keeps the stator from rotation in the opposite direction of the turbine (2). The stator now directs most of the oil back to impeller (3). The remainder of the oil goes out of the torque converter through outlet passage (4). The oil, that goes back to impeller (3) from stator (8), moves in the same direction as the rotation of the impeller. Since this oil is moving in the same direction as the impeller, the torque output from the torque converter is multiplied.Turbine (2) turns hub (6). Hub (6) turns output shaft (7). Power is sent through the output yoke (5) to the drive shaft and the transfer gears of the transmission.One-Way Clutch
Illustration 2 g00349076
Detail of one-way clutch (10) Cam (11) Rollers (12) Spring (13) Opening (14) RaceSplines connect stator (8) to cam (10). Cam (10) is turned by the stator. Race (14) does not turn. The mechanical connection between cam (10) and race (14) is rollers (11). Rollers (11) are in openings (13) of cam (10). Springs (12) are also in openings (13). The left side of openings (13) is smaller than the right side of openings (13) because the opening has a taper. Normally, springs (12) keep rollers (11) in the taper at the left side of openings (13) .When the speed of impeller (3) and turbine (2) is slow, stator (8) is held stationary. Rollers (11) are held in the taper of openings (13) by springs (12). There is a mechanical connection between cam (10) and race (14). Because race (14) is held stationary, cam (10) is held stationary. Because the cam can not turn, the stator does not turn. The stator can send oil back to the impeller.As the speed of impeller (3) and turbine (2) increases, stator (8) starts to turn. The stator (8)