TM 5-3805-260-24
PLANETARY TRANSMISSION
The transmission has four speeds FORWARD and two
speeds Reverse. It has planetary gear systems and six
hydraulic clutches. The No. 6 clutch is a rotating clutch
and acts as the output member. It fastens to the output
gear.
The transmission output gear is connected to the
transfer gear with splines. The transfer gear is
connected with splines to the output shaft. The output
shaft is conncctled h) a yoke a;nd universal joint to the
drive shaft .
CLUTCH OPERATION
1. Piston. 2. Springs. 3. Plates. 4. Ring
gear. 5. Discs. 6. Clutch housing.
The six transmission clutches are the disc type and in
separate housings. Each clutch has discs (5) and plates
(3). The inside teeth of discs (5) are engaged with the
outside teeth (,f ring gear (4). Notches on the outside
diameter of plates (3) are engaged with pins in the clutch
housing. The pins keep the plates from turning.
The springs (2) arc between clutch housing (6) and
piston (I). The springs keep the clutches disengaged
(not engaged). The clutches are engaged oil is sent into
the area behind piston (I). 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
springs (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 pressure
in the area behind piston (1) decreases and the springs
now’ push the piston to the left. The discs and plates are
now apart. The clutch is not engaged.
CLUTCH IDENTIFICATION
The three front clutches (No. I, No. 2 and No. 3) are
direction clutches. The No. 2 clutch is the REVERSE
direction clutch. The No. 1 and No. 3 clutches are the
FORWARD direction clutches. The three rear clutches
(No. 4, No. 5 and No. 6) are speed clutches. No.
clutch is a direction clutch for FOURTH FORWARD
speed.
A speed and a direction clutch must be engaged in
the transmission before power goes through the
transmission.
CLUTCH IDENTIFICATION
NOTE: No. 6 clutch is inside output transfer gear
case.
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