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362
FIAT· 850 PASSENGER CARS
Fig. 587 - Underside view of valve cover.
1. Cover. - 2. Plate for pressure regulating valve. - 3. Oil pressure
regulating valve. - 4. Return spring.
(fig. 583); slightly press the plunger to posltton
return spring correctly and hold
in
position
by
means of service tool A. 70146/2 (fig. 584), bearing
in mind that the return spring must be introduced
ahead of the plunger valve;
- lubricate solenoid sealing ring with oil and
place in position on the solenoid;
- place solenoid
in
its seat taking care not to
displace the sealing ring and tighten the two solenoid
retaining nuts to 15.9±1.08 It.lbs. (2.1 ±0.15 kgm);
- remove service tool A. 70146/2 and check
operation of solenoid-valve assembly and wiring
cormector
(3)
to the terminals of a
12 V
battery
(fig. 558);
- close oil pressure point
by
refitting plug (2,
fig. 585) together with sealing washer.
Make sure that the contact face on plunger valve
cover
0,
fig. 687) is perfectly clean and free from
scratches.
Check the gasket for wear or damage
and steel backing plate for distortion; if any damage
is found, replace cover.
Fig. 588 - Assembling the valve cover.
1. Feeler gauge.• 2. Oil return to reservoir and seat for pressure
regulating varve•• 3. Gasket.
Next:
- position return spring (4, fig. 587) onto oil
pressure regulating valve (3) in the recess;
- lubricate gasket (2, fig. 586) with oil and
place it with care on the cover making sure that
it
is not bent or tom;
- clean strainer (I, fig. 586), checking for damage
of the gauze and seal, and replace in its proper
position;
- insert .020" (0.5 rom) feeler gauge
(I,
fig.5S8)
under gasket (3) to cover recess (2) to prevent
the pressure regulating valve from damaging the
gasket during assembly of cover;
- fit the cover making sure that the valve does
act on the feeler gauge also ensuring that the spring
on the strainer is properly fitted on the recess of
the cover;
- hold the cover with one hand and screw-in
the retaining nuts with the other using new lock-
washers.
Do not tighten retaining nuts to avoid
damaging the gasket upon withdrawal of feeler
gauge;
- withdraw feeler gauge;
- tighten the nine retaining nuts to 13 ± 1.08
ft.1bs. (1.8±0.15 kgm) according to tightening ref-
erence shown in fig. 589;
- dose cover oil inlet by means of plug (4,
fig. 592).
Finally, to complete transmission reassembly,
proceed as follows:
- remove plug from central opening of torque
converter (which was inserted during dismantling) ;
- insert output shaft (2, fig. 590) into the torque
converter and ensure that the clutch freewheel is
working properly - while holding the shaft stationary,
the torque converter must be able to rotate in the
same direction as that of the engine and lock in
the opposite direction;
- place service tool A. 70147 (I, fig. 590) on
spring (I, fig. 592) so that the latter does not damage
the converter support seal and the pump seal dur-
ing the subsequent operation;
- lift the casing above the torque converter unit;
then, lower and turn slightly in an anti-clockwise
direction (fig. 591);
- check correctness of assembly by rotating
torque converter a few turns;
insert pin (5, fig. 592);
- remove service tool A. 70147;
- place casing flat and refit plug to guarantee
seal pin.
The Idroconvert transmission is thus ready to be
attached to the gearbox and then fitted to the vehicle;
when in position, proceed to
fill
the unit with oil
as described on page 355.
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