Fiat 411 Rb - Page 9

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’ Fig. 8. - Thermostat loca-
tion.
Check data:
—-opening begins: 82°-87°C
(1809 lo l89° F).
--- max. opening: 6 to T mm
[.'24” to .28") at 90"-95°C
l new to 203%).
the <<white » sector (during light works and cold weather) this indicates
that the water temperature is too low and the cool air draft through
the radiator should be reduced by the curtain or other suitable means.
if the pointer moves on to the << red » sector, this is a warning of engine
overheating.
Causes may be:
**** ~ water level in radiator too low;
— clogged honeycomb in radiator: remove the two grilles and clean
with a water iet; avoid wetting the engine if warm;
--M calcareous deposits in cooling system: flush as required (see
page 24);
--— slack tan belt: adjust tension;
¢—'-'- thermostat faulty operation: remove thermostat (see fig. 8) and
have it checked by skilled servicemen.
Generator charge indicator: should be lit only when engine is idling
and should go off as the engine is accelerated.
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If after going oft it glows again, though feebly, check and it necessary
replace the regulator fuse (see page 26). If not blown, have the ge-
nerator, regulator and ignition coil additional resistor inspected by an
authorized shop.
Engine operation at low speeds: when tractor is stopped with
engine running, the rpm must be kept at such a rate that the charge
indicator remains decidedly OFF. Never leave the engine running at
a speed which causes the generator charge indicator to go ON and
OFF intermittently, since this might damage the generator regulating
unit and therefore prevent a proper recharge of the battery.
FUEL FEED
A faulty fuel teed may be caused by an excessive restriction of the
strainer contained in bowl filter (see operation 23 of the Mainte-
nance Chart); the Operator may wash the strainer with gasoline and
blow dry with air.
USE OF POWER TAKE-OFF
Power take-off shaft revolves clockwise (as seen from rear of tractor).
The 6—spiine shaft diameter is of 13/B".
By means of the lever shown in fig. 5, the power take-off can be driven
either oft the engine or off the transmission.
e Taking the drive directly from the engine is not only useful
to operate stationary farm machines but also as a power source
for tractor-operated trailed implements (hay tedders, picker—ba-
Iers, etc.) because it the trailed machine is temporarily bottle-
necked in its work, the tractor may be stopped for a while with
implement operating until the contingent overload is cleared
and work resumes its normal pace. To do this, simply push
clutch pedal in to midtravel or against thestop plate if properly
positioned (see fig. BA); if the stop plate was not moved down
but left as shown in fig. 68, in order to temporarily stop also the
trailed implement just press in clutch pedal all the way. With engine
at full throttle (2600 rpm) the P.T.O. operates at 625 rpm.
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