TM 5-3805-260-24PLANETARY TRANSMISSIONThe transmission has four speeds FORWARD and twospeeds Reverse. It has planetary gear systems and sixhydraulic clutches. The No. 6 clutch is a rotating clutchand acts as the output member. It fastens to the outputgear.The transmission output gear is connected to thetransfer gear with splines. The transfer gear isconnected with splines to the output shaft. The outputshaft is conncctled h) a yoke a;nd universal joint to thedrive shaft .CLUTCH OPERATION1. Piston. 2. Springs. 3. Plates. 4. Ringgear. 5. Discs. 6. Clutch housing.The six transmission clutches are the disc type and inseparate housings. Each clutch has discs (5) and plates(3). The inside teeth of discs (5) are engaged with theoutside teeth (,f ring gear (4). Notches on the outsidediameter of plates (3) are engaged with pins in the clutchhousing. The pins keep the plates from turning.The springs (2) arc between clutch housing (6) andpiston (I). The springs keep the clutches disengaged(not engaged). The clutches are engaged oil is sent intothe area behind piston (I). When the pressure of the oilin the area behind the piston increases, the piston movesto the right. The piston moves against the force ofsprings (2) and pushes the discs and plates together.The clutch is no’ engaged. The discs keep ring gear (4)from turning. When the clutch is released, the pressurein the area behind piston (1) decreases and the springsnow’ push the piston to the left. The discs and plates arenow apart. The clutch is not engaged.CLUTCH IDENTIFICATIONThe three front clutches (No. I, No. 2 and No. 3) aredirection clutches. The No. 2 clutch is the REVERSEdirection clutch. The No. 1 and No. 3 clutches are theFORWARD direction clutches. The three rear clutches(No. 4, No. 5 and No. 6) are speed clutches. No.clutch is a direction clutch for FOURTH FORWARDspeed.A speed and a direction clutch must be engaged inthe transmission before power goes through thetransmission.CLUTCH IDENTIFICATIONNOTE: No. 6 clutch is inside output transfer gear case.2-84
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