Freightliner Business Class M2. Manual — part 13
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26–04 Eaton Fuller
Transmission Air Filter/
Regulator Element
Cleaning
NOTE: Eaton Fuller FS/FO and T/TX transmis-
sions do not have an air filter/regulator element
that can be serviced.
WARNING
Exhaust the air supply before servicing the air
filter/regulator; otherwise, serious personal injury
and component damage could result.
1.
Exhaust the air from the air reservoirs.
2.
Clean the outside of the air filter/regulator with
cleaning solvent, then 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. It
cannot be repaired.
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-
f260007a
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NOTE: Location of the transmission breather will vary
depending on transmission model.
Fig. 3, Transmission Breather (Eaton Fuller shown)
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05/27/93
NOTE: Location of the air filter/regulator will vary de-
pending on transmission model.
Fig. 4, Eaton Fuller Transmission Air Filter/Regulator
Location
1
2
3
4
5
6
7
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1.
Air Regulator
2.
Housing
3.
Large O-Ring
4.
Filter Element
5.
Small O-Ring
6.
End Cap
7.
Plug
Fig. 5, Eaton Fuller Transmission Air Filter/Regulator
Components
Transmission
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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, then the filter element
(small end first) into the filter housing.
7.
Install the small O-ring in the end cap, then in-
stall the end cap on the filter housing. Tighten
the end cap until firm.
8.
Start the engine, and build pressure in the air
system. Check for air leaks at the filter housing
and air line connections, and repair any leaks.
NOTICE
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.
26–05 Allison Transmission
Fluid and Filter
Changing
When draining transmission fluid, check for evidence
of dirt or water contamination. A small amount of
condensation will appear in the fluid during operation.
Water contamination is normally characterized as a
milky discoloration of the transmission fluid. Obvious
contamination of the transmission fluid indicates a
leak between the water and fluid areas of the trans-
mission cooler. Inspect and pressure-test the cooler
to confirm the leak; replace leaking transmission
coolers.
1000/2000/2400 Series
1.
Park the vehicle on a level surface and apply the
parking brakes.
2.
Run the engine until the transmission fluid
reaches the operating temperature of 160 to
200°F (71 to 93°C). Shift the transmission to
neutral (N) and shut down the engine.
NOTICE
To prevent dirt from entering the transmission,
use only clean containers and fillers for the trans-
mission fluid. Do not use fillers or containers that
have been used for water or antifreeze. Dirt, water,
or antifreeze could damage the transmission.
3.
Clean the area around the drain plug. Place a
drain pan under the transmission and remove the
drain plug. Examine the fluid while it drains. If
only the filter is being changed, do not drain the
fluid.
NOTE: A lot of fluid will drain when the filter is
removed.
4.
Using a standard strap-type filter wrench, remove
the filter by turning it counterclockwise.
5.
Remove the magnet from the filter attachment
tube or from the top of the filter element.
6.
Clean any metal debris from the magnet. Then,
install the magnet on the filter attachment tube.
7.
Using transmission fluid, lubricate the gasket on
the filter.
8.
Using your hand, install the filter by turning it
clockwise until the filter gasket contacts the con-
verter housing or cooler manifold. Then, turn the
filter one more complete turn.
9.
Install the drain plug and sealing washer. Tighten
the plug 22 to 30 lbf·ft (30 to 40 N·m).
10. Clean the area around the fill tube and remove
the dipstick. Using a clean funnel in the fill tube,
add transmission fluid. See
for approved
transmission lubricants, and
for lubricant
capacities.
11. Check and adjust the fluid level using the appro-
priate Allison Transmission procedure in
MD and HD Series
NOTICE
To prevent dirt from entering the transmission,
use only clean containers and fillers for the trans-
mission fluid. Do not use fillers or containers that
have been used for water or antifreeze. Dirt, water,
or antifreeze could damage the transmission.
Transmission
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![](/vehicles/itar/lers/peyo/oveayod.png)
Approved Allison Transmission Lubricants
Lubricant Type
*
Temperature: °F (°C)
All Allison Transmissions
Castrol TranSynd
™
(synthetic)
Above –22 (–30)
Dexron® III
Above –13 (–25)
*
Lubricants listed in order of preference. Do not mix types of oil.
Table 7, Approved Allison Transmission Lubricants
Allison Transmission Lubricant Capacities
Transmission Model
Fill Capacity:
*
qt (L)
On-Highway Transmissions
1000/2000/2400 Series (standard sump)
15 (14)
1000/2000/2400 Series (shallow sump)
13 (12)
HD/MD Series
HD4060/4560 (standard sump)
36 (34)
†
HD4060/4560 (shallow sump)
26 (25)
†
MD3060/3066/3560 (standard sump)
19 (18)
MD3060/3066/3560 (shallow sump)
10.5 (10)
*
Quantities listed are approximate. Add the recommended amount of fluid
as listed under fill capacity, then perform a "hot check" and add fluid as
needed. Do not overfill.
†
Add 3 quarts (3 liters) if equipped with a PTO.
Table 8, Allison Transmission Lubricant Capacities
1.
Park the vehicle on a level surface and apply the
parking brakes.
2.
Operate the vehicle until the transmission
reaches normal operating temperature: 160 to
200°F (71 to 93°C).
3.
Clean the area around the drain plug and the
transmission fluid pan. Place a drain pan under
the transmission and remove the drain plug. Ex-
amine the fluid as it drains. If only the filter is
being changed, do not drain the fluid.
4.
Remove the 12 mounting bolts (six each) from
the two filter covers.
NOTE: A lot of fluid will drain when the filter
covers are removed.
5.
Remove the filter covers, O-rings, and two
square-cut seals from the transmission. See
6.
Remove the filters from the bottom of the control
module.
7.
Lubricate the new O-rings with transmission fluid,
and install them on the cover assemblies.
8.
Install a new square-cut seal on each cover as-
sembly, and install the fluid filter elements on the
cover assemblies.
1
1
1
1
2
2
3
3
4
4
f260317
08/25/95
1.
Filter Cover
2.
Filter Element
3.
Filter Element O-Ring
4.
Square-Cut Seal
Fig. 6, Allison MD and HD Series Transmission Filter
Locations and Components
Transmission
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![](/vehicles/itar/lers/peyo/kizcons.png)
9.
Install the filter and cover assemblies into the
filter compartment.
10. Align each cover assembly with the holes in the
channel plate sump, and push the cover assem-
blies in by hand to seat the seals.
NOTICE
Do not use the bolts to draw the filter covers to
the sump. This can damage the covers, seals, or
sump.
11. Install six bolts in each cover, and torque the
bolts 38 to 44 lbf·ft (51 to 61 N·m).
12. Install a new drain plug O-ring, and install the
drain plug. Tighten the drain plug 18 to 24 lbf·ft
(25 to 32 N·m).
13. Refill the transmission with fresh Dexron® trans-
mission fluid (see
) and check the fluid
level. See
for lubricant capacities.
14. Check and adjust the fluid level using the appro-
priate Allison Transmission procedure in
26–06 Mercedes-Benz
Transmission Fluid
Changing and Magnetic
Plug Cleaning
Draining
1.
Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
NOTE: Drain the transmission fluid while the
transmission is warm.
2.
Drain the transmission fluid, as follows. See
2.1
Remove the magnetic drain plug from the
bottom of the gear case.
2.2
Discard the aluminum gasket.
2.3
Catch the transmission fluid in a suitable
container and dispose of it properly.
3.
Clean the area around the fill plug. See
for the location of the fill plug.
4.
Remove the fill plug from the side of the case.
Discard the aluminum gasket.
NOTE: Use a piece of key stock, or any other
convenient steel slug, to short the two magnetic
poles and divert the magnetic field.
5.
Clean the magnetic drain plug before installing it.
6.
Install the drain plug (p/n A 124 997 01 32) and a
new aluminum gasket (p/n N 00763 024105).
Tighten the drain plug 42 lbf·ft (57 N·m).
Filling
NOTICE
Operating a manual transmission with the fluid
level higher or lower than recommended can re-
sult in transmission damage. Do not overfill the
transmission; overfilling will force fluid out of the
case through the main shaft openings. Fluid over-
flow may also drain onto the clutch or clutch
brake, causing additional problems.
1.
Add transmission fluid until it is level with the
lower edge of the fill opening. See
for the
correct level. See
for approved transmis-
sion lubricants and
for lubricant
capacities.
05/22/2001
f261102
1
2
3
NOTE: The transmission is shown from the left-hand
side.
1.
Transmission
2.
Fill Plug
3.
Drain Plug
Fig. 7, Mercedes-Benz Transmission Drain and Fill
Plugs
Transmission
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