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FINAL DRIVE Oil COOLING SYSTEM
PROCEDURE
1. Remove the final drive plug and allow adequate
time for the old oil to drain.
2. Reinstall the drain plug.
3. Remove the fill plug and add gear oil until it just
begins to flow back out of the hole. Use only
gear
oi I which
meets or exceeds API-G L5
standards.
The
temperature/viscosity
recommendations are as follows:
15°F (-10°C) and above: SAE 80W-90
Below 15°F (-10°C): SAE 75W
4. Reinstall the fill plug.
When replacing a system component only, such as
the differential,
radiator, oil line, oil filter or the
pump, the system must be reprimed with oil. Only in
this event,
perform these additional
steps after
following
steps 1·4 above:
NOTE: This procedure should not be performed
unless the temperature
of the oil in the
differential
is at least 50°F.The pump will not
operate properly due to the thickness of the
oil if the temperature is below this point.
5. Disconnect
the
black
and
the
violet
thermoswitch
leads and briefly "touch"
them
together
using a test lead or similar wire. The
pump will then operate for a 3-minute cycle.
(The pump will "whine" while operating due to
the greater viscosity of the cooler oil. This is
normal.)
CAUTION
If the pump makes an abnormally shrill, siren-like
noise while
operating,
check for
plugged
or
pinched oil lines. If the pump does not stop after 3
minutes, the thermoswitch or the timer-relay may
be faulty.
6. When
the
pump stops, add the necessary
amount of oil through the final drive fill hole to
bring it up to the required level.
F7-26
Differential
Fill Plug
Differential
Drain Plug
Engine Oil
Drain Plug
J
1
J
1
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Troubleshooting
