26–01 Eaton/Fuller
Transmission Oil Level
Checking
1.
With the transmission at operating temperature,
and the vehicle on a level surface, check the oil
level in the transmission.
1.1
Clean the area around the fill plug, then
remove the plug from the side of the
case.
1.2
Using your finger or a bent pipe cleaner,
see if the oil is level with the fill opening.
See
2.
If needed, fill the transmission with oil until level
with the lower edge of the fill opening. See
for approved lubricants.
Approved Lubricants, Eaton/Fuller Transmissions
*
Lubricant Type
Temperature
SAE
Viscosity
Heavy-Duty Engine
Oil
API Service
Classification
SF or CD
Above +10°F (–12°C)
40 or 50
Below +10°F (–12°C)
30
*
Do not mix types of oil.
Table 1, Approved Lubricants, Eaton/Fuller
Transmissions
CAUTION
Operating an Eaton/Fuller transmission with the
oil level higher or lower than recommended can
result in transmission damage. Do not overfill the
transmission; overfilling will force oil out of the
case through the main shaft openings. Oil over-
flow may also drain onto the clutch or clutch
brake, causing additional problems.
IMPORTANT: Do not mix types of oil, because
of possible incompatibility. Do not use oil addi-
tives, friction modifiers, or synthetic lubricants.
3.
Clean the fill plug, then install it in the transmis-
sion. Tighten the plug as follows:
20 to 25 lbf·ft (27 to 34 N·m) for a 3/4-inch plug;
60 to 75 lbf·ft (81 to 102 N·m) for a 1-1/4 inch
plug.
26–02 Eaton/Fuller
Transmission Oil
Changing and Magnetic
Plug Cleaning
Draining
1.
Clean the area around the fill plug.
2.
Remove the fill plug from the side of the case.
Remove the drain plug(s) from the bottom of the
transmission case.
3.
Drain the oil while the transmission is warm.
4.
Clean the magnetic plug(s) before installing.
(Use a piece of key stock, or any other conve-
nient steel slug, to short the two magnetic poles
and divert the magnetic field.) Install and tighten
the drain plug(s) 20 lbf·ft (27 N·m).
Filling
1.
Add oil until it is level with the lower edge of the
fill opening. See
. If the transmission has
two fill openings, add oil to the level of both fill
openings. See
for approved transmission
lubricants, and
for lubricant capacities.
CAUTION
Operating an Eaton/Fuller transmission with the
oil level higher or lower than recommended can
result in transmission damage. Do not overfill the
transmission; overfilling will force oil out of the
case through the main shaft openings. Oil over-
f260006b
10/05/94
A
B
A. Full
B. Low
Fig. 1, Manual Transmission Oil Level Checking
Transmission
26
School Bus Chassis Maintenance Manual, March 2003
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