Freightliner Cargo Maintenance Manual — part 10
Title of Maintenance Operation (MOP)
MOP Number
Allison Transmission Fluid and Filter Change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–05
Allison and Eaton/Fuller Transmission Breather Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–03
Eaton/Fuller Transmission Air Filter/Regulator Element Clean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–04
Manual Transmission Oil Change and Magnetic Plug Clean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–02
Manual Transmission Oil Level Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–01
Transmission
26
Index, Alphabetical
Cargo Maintenance Manual, January 2000
26–01 Manual Transmission Oil
Level Check
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. Re-
move 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 lower edge
of 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 Transmission Lubricants
Lubricant Type
Temperature: °F (°C)
SAE
Viscosity
Eaton/Fuller Transmissions
*
Heavy-Duty
Engine Oil API
Service
Classification SF
or CD
Above 10 (–12)
40 or 50
Below 10 (–12)
30
Allison AT and MD Series Transmissions
†
Dexron II
–25 to +120 (–32 to +48)
—
Allison MT Series Transmissions
Dexron
®
IIE
–10 to +120 (–23 to +48)
—
Dexron
®
III
–10 to +120 (–23 to +48)
—
Type C4
10 to 120 (–12 to +48)
SAE 10W
Type C4
32 to 120 (0 to 48)
SAE 30W
*
Lubricants listed in order of preference. Do not mix types of oil.
†
Factory filled with Dexron II. For off-highway operation or where ambient
temperature is consistently above 86°F (30°C) or below –25°F (–32°C), re-
fer to the manufacturer’s fluid recommendations.
Table 1, Approved Transmission Lubricants
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 the transmission will
force oil out of the case through the main shaft
openings. Oil overflow may also drain onto the
clutch or clutch brake causing additional prob-
lems.
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. Install the fill plug in the trans-
mission. Tighten the plug:
•
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 Manual Transmission Oil
Change and Magnetic
Plug Clean
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 it.
(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).
f260006b
10/05/94
A
B
A. Full
B. Low
Fig. 1, Transmission Oil Level Checking
Transmission
26
Cargo Maintenance Manual, January 2000
26/1
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 lubri-
cants, and
for lubricant capacities.
Transmission Lubricant Capacities
Transmission
Refill Capacity
*
quarts (liters)
Eaton/Fuller Models
FS-4205A/B
4.75 (4.5)
FS-5205A/B
5.25 (5.0)
FS-6305A/B
9.5 (9.0)
FS-5306A
9.0 (8.5)
FS-6306A
9.0 (8.5)
FS-8206A
10.0 (9.5)
RT-6609A
6.0 (5.7)
Allison Models
AT-545
16.0 (15.0)
MD
17.5 (16.5)
MT-643
MT-653
15 (14)
*
Quantities listed are approximate. Fill the transmission until the lubricant
is level with the bottom of the fill hole (on Eaton/Fuller transmissions) with
the vehicle in normal operating position. On Allison transmissions, add the
recommended amount of fluid as listed under refill capacity. Perform a "hot
check" and add fluid as needed. Do not overfill.
Table 2, Transmission Lubricant Capacities
CAUTION
Operating a Eaton/Fuller transmission with the oil
level higher or lower than recommended can re-
sult in transmission damage. Do not overfill the
transmission. Overfilling the transmission will
force oil out of the case through the main shaft
openings. Oil overflow may also drain onto the
clutch or clutch brake causing additional prob-
lems.
IMPORTANT: Do not mix types of oil, because
of possible incompatibility. Do not use oil addi-
tives, friction modifiers, or synthetic lubricants.
NOTE: The correct oil capacity is established by
the fill plug opening.
2.
Clean the fill plug. Install the fill plug. Tighten the
plug:
•
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.
26–03 Allison and Eaton/Fuller
Transmission Breather
Check
Transmission housing breathers must remain clear. A
plugged breather could result in pressure build-up
which could cause oil leakage.
If the breather is plugged, clean or replace it. See
. Check more often if the vehicle is operating
under very dusty conditions.
26–04 Eaton/Fuller
Transmission Air Filter/
Regulator Element Clean
1.
Exhaust the air from the air reservoirs.
f260007a
05/27/93
Fig. 2, Transmission Breather (Eaton/Fuller shown)
Transmission
26
Cargo Maintenance Manual, January 2000
26/2
WARNING
Exhaust the air supply before servicing the air
filter/regulator; otherwise, serious personal injury
and component damage could result.
2.
Clean the outside of the air filter/regulator with
cleaning solvent. Let it air dry. See
3.
Remove the end cap, large O-ring, and filter ele-
ment from the filter housing. See
. Remove
the small O-ring from the end cap.
NOTE: Do not remove, disassemble, or adjust
the air regulator. If the air regulator is not keep-
ing the air pressure between 57 to 62 psi (396
to 431 kPa), replace the air filter/regulator,
which is not serviceable.
4.
Clean the filter element.
4.1
Dip the filter element in alcohol or other
cleaning solvent. Blow compressed air
through the filter element (inside to out-
side) to loosen surface dirt and to dry the
element. The sintered metallic filter ele-
ment will last the life of the vehicle, pro-
vided it is not damaged.
4.2
Wipe out the filter housing with a clean,
dry, lint-free rag.
5.
Clean and inspect the O-rings and the end cap.
Replace any parts that are damaged.
6.
Install the large O-ring into the filter housing.
7.
Install the filter element (small end first) into the
filter housing.
8.
Install the small O-ring into the end cap. Install
the end cap on the filter housing. Tighten the end
cap 8 to 12 lbf·ft (11 to 16 N·m).
9.
Start the engine and build up pressure in the air
system. Check for air leaks at the filter housing
and air line connections and repair any leaks.
CAUTION
Repair any air leaks. A leaking air filter or air lines
can cause slow or hard shifting of the transmis-
sion and eventual transmission damage.
f260037a
05/27/93
Fig. 3, Eaton/Fuller Transmission Air Filter/Regulator
Location
1
2
3
4
5
6
7
f260052a
10/17/2001
1.
Air Regulator
2.
Housing
3.
Large O-Ring
4.
Filter Element
5.
Small O-Ring
6.
End Cap
7.
Plug
Fig. 4, Eaton/Fuller Transmission Air Filter/Regulator
Components
Transmission
26
Cargo Maintenance Manual, January 2000
26/3
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