Component Operation And Location - Opel 1900 1973 Service Manual

1973 OPEL SERVICE MANUAL
The clutch is released by exhausting the oil from
behind the piston. The release springs push the pis-
ton to the released position, thereby removing the
force from the plates. See Figure 7C-16.
S P R
Figure 7C-16 Sprag Cage Assembly
Sprag
A sprag clutch is an overrunning clutch which allows
rotation in one direction only and consists of an inner
race, an outer race and the sprag assembly.
The sprag assembly itself consists of sprags, retainer
rings and a spring. See Figure 7C- 16. The sprags are
mounted at intervals between the two concentric re-
taining rings. The spring is located between the rings
and surrounds the 'narrow portion of the sprags.
One diagonal dimension of each sprag is greater than
the distance between the inner and outer race, while
the other diagonal is less. See Figure 7C-17. This
Figure 7C-17 Sprag Operational Schematic
DISTANCE A
causes the sprags to wedge and prevent rotation in
one direction, and to allow free rotation in the oppo-
site direction.
Band
A band is used to hold one planetary member sta-
tionary with relation to the other planetary mem-
bers. !See Figure 7C-19. The band is connected to the
case (stationary
rated by a servo piston. One band is used in the Opel
Three: Speed Automatic Transmission and holds the
reaction sun gear
and drum
second gear.
B A N D
\
PRESSURE
PASSAGE y
SERVO BODY RELEASE SPRING
Figure 7C-19 Band Application
COMPONENT OPERATION
The power flow and principles of operation of the
Opel Three Speed Automatic Transmission power
train are most easily understood when each unit is
considered separately with a part by part build up of
the unit.
The torque converter is connected to the engine by
means of a flex plate which is bolted directly to the
engine crankshaft and to the converter cover. The
converter cover is welded to the converter pump
member which provides a direct connection of the
engine to the converter. The converter pump hub tits
into
the transmission oil pump driving the oil pump
whenever the engine is operating. See Figure 7C-20.
The input shaft is splined into the hub of the turbine,
delivering the converter's output torque to the trans-
mission gear train. See Figure 7C-21.
anchor) and is ope-
stationary
in first and
STATIONARY
7c19
AND LOCATION