Fiat 850 Sedan 1968 Shop Manual page 365

IDROCONVERT TRANSMISSION
357
SERVICE PROCEDURES
To Remove.
The~
removal-procedure for the Idroconvert trans-
mission is the' same as that adopted for the con-
ventional clutch-gearbox unit.
Firstly. it will be necessary to remove torque
converter and gearbox as a single unit; then torque
converter and gearbox may be separated as re-
quired. Proceed as follows:
- disconnect negative terminal from battery;
- remove upper rear cross-member
I
generator
and starter motor;
- remove bottom cover from car;
- free lower end of rear shock absorbers and
compress them upwards;
- remove flywheel cover and, through the result-
ing opening
I
remove the four flywheel-ta-torque
converter screws rotating the torque converter as
required;
- disconnect speedometer cable and sheath,
gear shift control rod from its linkage, solenoid
connection and neutral switch leads;
- disconnect half shafts from rear wheel hubs;
- support gearbox by means of a suitable jack
and remove the two screws holding gearbox cross
member to body shell;
- lower jack slightly so that the gearbox slopes
down towards the front of the car;
- remove retainer ring holding auxiliary oil
reservoir rubber hose in position on converter
cover oil inlet connection;
- disconnect rubber hose and drain the oil in
a clean vessel;
- close the oil inlet connection by means of a
rubber plug;
- remove four screws holding transmission cas-
ing to engine;
- disconnect torque converter-gearbox assembly
and lower the jack.
To separate Idroconvert transmission from gearbox
proceed as follows:
- drain gearbox oil into a clean vessel;
- remove two side rubber boots with their
respective half-shafts;
- remove five screws holding Idroconvert trans-
mission to gearbox;
- separate torque converter and clutch assembly
from gearbox.
To Refit.
To refit the transmission carry out the following
operations in the order given.
Fit Idroconvert assembly to gearbox in the fol-
lowing manner:
- apply a film of sealing compound on contact
faces of both Idroconvert unit and gearbox casings;
- couple torque converter output shaft to gear-
box input shaft by means of inter-connecting sleeve;
tighten five retaining screws on both casings;
refit both half shafts together with the two
side rubber boots;
fill gearbox with fresh oil up to prescribed
level.
Place transmission assembly on a garage jack
and offer-up to engine flywheel.
Position torque converter spigot in its recess on
the flywheel and three starter motor retaining studs
in the three corresponding holes in Idroconvert
unit casing.
Then, complete refitting as follows:
- tighten four screws holding transmission cas-
ing to engine;
remove plug from transmission oil inlet, con-
nect rubber hose and reposition retaining collar;
lift gea.rbox and fix cross-member to body;
fix torque converter to engine flywheel;
N. B.• The torque converter is a statically and
dynamically balanced unit. It may, therefore, be
fitted on the flywheel in any position.
refit flywheel cover;
connect half-shaft to rear wheel hub;
reconnect revolution counter cable sheath,
solenoid lead and neutral switch leads;
- connect gearshift rod to its linkage;
- re-anchor lower end of rear shock absorbers
and replace bottom cover in position;
- fit starter motor, generator and rear upper
cross member;
- reCOIwect negative battery terminal;
- fill transmission with fresh oil and check oil
level as described on page 354.
To Dismantle.
The following pages contain a description of the
correct sequence of transmission dismantling and
reassembling; servicing of individual units and the
most important details are dealt with from page 363
to page 367.
For correct dismantling proceed as follows:
- remove plug (8, fig. 586) and pin (I, fig. 575),
from guarantee seal seating;
- lift outer casing so as to free it from torque
converter (2, fig. 575);