The way of torque-converting can be used to ensure efficient and smooth work
of the torque converter.
The torque converter, filled up with the torque converter oil, in the drive unit is
driven by an engine through a spring plate and flywheel on the engine. A charging
pump is driven by a driving gear which is splined to the impeller. The oil for the
torque converter and the transmission is supplied by the pump. The power is
transmitted to the transmission through a turbine shaft splined to the turbine.
4.3 Hydraulic Clutch (See Fig.4-3)
Both hydraulic multipiece clutches of wet type are fixed on the input shaft of the
transmission. The pressure oil is supplied to the forward or the backward clutch
through a control valve to achieve the forward or the backward travel of the truck. All
of gears in the transmission are normally meshed.
Every clutch consists of four (five 3.8t) spacers (24) and four friction
pieces (25) assembled alternately and a piston. On the inner and the outer circles of
the piston are seal rings for sealing the piston. In the neutral, the piston is still and the
spacers and the friction pieces are disengaged each other. When shifting, the oil
pressure acts on the piston and the spacers and the friction pieces are engaged each
other to form an integral so that the power from the torque converter is transmitted to
the forward driving gear (13) or the backward driving gear (4).
The power from the torque converter is transmitted to the transmission in
following order:
Turbine-Input shaft-Spacer-Friction piece-Forward or backward driving gear-
Output shaft.
(five 3.8t)
-34-
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