31
EA(B)O-6X06
01/2018 Rev. 1
2. Operation
Power Flow
1.
Torque from the engine is transferred, through
the clutch, to the transmission`s input shaft (1).
The direction of the rotation is the same as of the
engine, always clockwise.
2.
From the input shaft (1), the torque is transferred
to the countershaft driven gear (21) through the
input shaft drive gear (3), performing the first
reduction in the transmission. All gears on the
countershaft (22) rotate attached to this shaft at
the same speed and the direction of the rotation
is counterclockwise.
3. The input shaft (1) rotates apart from the mainshaft
(14) in order to transmit power to the countershaft
(22) independently of the mainshaft. Between
these two shafts there is a conical bearing (2)
known as “pocket”, installed on the mainshaft end
and supported on the input shaft, what allows both
shafts to rotate at different rotation speeds.
ESO-6106/6206/fluxo4
3
22
7
21
14
6
4. The torque along the countershaft (22) is
transmitted to all the gears of the mainshaft (14),
assembled on needle roller bearings. Each gear
on the mainshaft rotates at a different speed,
according to the gear ratio of that specific shifted
speed (see Gear Ratio table in the General
Information section).
5. When a forward speed is shifted (the example
in the figure shows the 4th speed), the torque
is transferred to the mainshaft (14) by the
corresponding gear (6) of that shifted speed,
through the synchronizer (7) spline that is
actuating. At this point, the second reduction
occurs inside the transmission. In the forward
speeds, the direction of rotation of the main axis
is always clockwise.
How the transmission works
1. Input shaft
2. Mainshaft “pocket” bearing cone
3. Input shaft drive gear
6. Mainshaft 4th speed gear
7. 3rd/4th speed synchronizer assy.
14. Mainshaft
21. Countershaft driven gear
22. Countershaft
2
1
