HOSE 2867172 - Caterpillar

Synchronizer for the Third Speed and Fourth Speed
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Synchronizer for the Third/Fourth Speed (24) Output shaft (30) Third gear (31) Fourth gear (49) Hub (50) Sleeve (54) Strut (55) Spring (57) Outer cone (61) Plate (62) Steel ball
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Output Shaft (Shown Outside of the Transmission for Clarity) (63) Shift rail (64) ForkThe synchronizer for the third/fourth speed operates on the same principles as the synchronizer for the first/second speed, but it does not include all of the same components. The components that are not used in the synchronizer for the third/fourth speed are the friction rings and the connecting blocks.The synchronizer for the third/fourth speed has the following components that operate in the same way as the synchronizer for the first/second speed:
Sleeve (50)
Strut (54)
Springs (55)
Outer cone (57)
Hub (49) The synchronizer for the third/fourth speed has the following components that operate in a different way to the synchronizer for the first/second speed:Plates (61) - The plate (61) for the third speed is splined to third gear (30) on output shaft (24). The plate (61) for the fourth speed is splined to fourth gear (31) on output shaft (24). The plates (61) have an inner cone that is machined into the inner circumference of the plates (61). The plates (61) also have teeth around the outer circumference.When third speed or fourth speed is selected, shift rail (62) moves in a direction that is parallel to the output shaft. Fork (63), which is attached to the shift rail, exerts a force on sleeve (50) in order to initiate the engagement of the synchronizer. The synchronizer for the third speed and fourth speed operates in the same way as the synchronizer for the first/second speed. The frictional force that is required to equalize the speed of the output shaft and the speed of the output gear is produced between outer cone (57) and the inner cone on plate (61) .Steel balls (62) - The three steel balls will operate in the same way as the detent pins on the synchronizer for the first/second speed. The steel balls sit in a groove on the inside of outer ring (50). This action causes the struts to move.Synchronizer for the Fifth Speed (If Equipped)
The synchronizer for the fifth speed operates on the same principles as the synchronizer for the third/fourth speed. However, the synchronizer for the fifth speed has the following differences to the synchronizer for the third/fourth speed:
The fifth speed cannot be selected manually.
The fifth gear is engaged and disengaged automatically when the transmission is in fourth gear.
The synchronizer for the fifth speed operates on one side instead of two sides.
The synchronizer operates on the countershaft instead of the output shaft.
The actuator is held hydraulically in the DISENGAGED position.
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Synchronizer for the Fifth Speed (20) Countershaft (32) Fifth gear (49) Hub (50) Sleeve (54) Strut (55) Spring (57) Outer cone (61) Plate (62) Steel ball
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(65) Shift rail (66) ForkThe synchronizer for the fifth speed operates in the same way as the top