Transmission Maintenance
Manual Transmission (EATON-FULLER)
LUBRICATION
Proper lubrication procedures are the key to a good all-around maintenance program. If the
oil is not doing its job, or if the oil level is ignored, all the maintenance procedures in the
world are not going to keep the transmission running or assure long transmission life. Eaton
Fuller Transmissions are designed so that the internal parts operate in an oil bath circulated
by the motion of the gears and shafts. Thus, all parts are amply lubricated if these
procedures are closely followed:
1. Maintain oil level. Inspect regularly.
2. Change oil and filters regularly.
Use the correct grade and type of oil. Buy oil from a reputable dealer.
Additives and friction modifiers are not recommended for use in Eaton Fuller Transmissions.
1. Maintain Proper Oil Level-(Eaton Fuller Manual Transmission)
First locate the oil level plug holes by facing the rear of the 32000 series manual
transmission. There are two 1/4 x 18 taper pipe thread oil level holes on the lower left hand
side of the transmission case. The ful oil level hole is 1 1/2 inches above the low oil level
hole. Initially fill the transmission with oil until it flows out the low oil level plug hole, install
the low oil level plug. Start and run the engine at idle speed to prime the converter, oil
cooler and lines. Recheck the oil level with the engine running at idle speed and add oil to
bring level to the low oil level plug hole. When the oil temperature is stabilized at 180 to 200
degrees F., make final oil level check and bring oil level to the full oil level plug hole and
install the oil level plug.
Make sure oil is within dipstick marks for the corresponding oil temperature. Oil should be
checked at idle speed in the neutral position using the corresponding temperature band.
Cold checks can be performed when the oil temperature is 60-120°F. The oil level should
be within the dipstick "cold" band. Additional checks can be made with the transmission at
operating temperature by using the "hot" band on the opposite side of the dipstick. The
"hot" band temperature range is 180-220°F.
2.Draining Oil
Drain transmission while oil is at ambient temperature (65°F + 20). To drain oil, remove the
main case drain plug and the converter housing oil pan drain plug. Clean the drain plugs
and flush the cooler circuit before reinstalling.
A complete hydraulic circuit flush should be completed when:
- changing oil types and brands
- changing oil viscosity grades from or to Arctic oil.
T300-1_T500-1_T780
Maintenance
338 P/N 12261-683
REVISED: January 2015
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