TRANSMISSION - TM-5-2410-237-230560

TM 5-2410-237-23

TRANSMISSION THEORY OF OPERATION - CONTINUED

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TRANSMISSION

The transmission has three speeds forward and three speeds reverse. It has planetary gear systems and five hydraulic

clutches.

The five transmission clutches are disc type and in separate housings. Each clutch has discs (19) and plates (20). The

inside of discs (19) are engaged with the outside teeth of ring gear (21). Notches on the outside diameter of plates (20)

are engaged with pins in the clutch housing. The pins keep the plates from turning.

The springs (22) are between clutch housing (23) and piston (24). The springs keep the clutches disengaged. The

clutches are engaged when oil is sent into the area behind the piston (24). When the pressure of the oil in the area behind

the piston increases, the piston moves to the right. The piston moves against the force of spring (22) and pushes discs

and plates together. The clutch is now engaged. The discs keep ring gear (21) from turning. When the clutch is released,

the pressure in the area behind piston (24) decreases and the spring now push the piston to the left. The discs and plates

are now apart. The clutch is disengaged.

The two front clutches (no. 1 and no. 2) are direction clutches. The no. 1 clutch is the forward direction clutch. The no.

2 clutch is the reverse direction clutch. The three rear clutches (no. 3, no. 4 and no. 5) are speed clutches.

NUMBER 1

CLUTCH

NUMBER 2

CLUTCH

NUMBER 3

CLUTCH

NUMBER 4

CLUTCH

NUMBER 5

CLUTCH

387-637

A speed and direction clutch must be engaged in the transmission before power goes through the transmission.

SPEED

CLUTCHES ENGAGED

First Forward

1 and 5

Second Forward

1 and 3

Third Forward

1 and 4

First Reverse

2 and 5

Second Reverse

2 and 3

Third Reverse

2 and 4

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