Specifications

NOTE: Do not remove, disassemble, or adjust
the air regulator. If the air regulator is not keep-
ing the air pressure between 58 and 63 psi (400
to 435 kPa), replace the air filter/regulator. It
cannot be repaired.
WARNING
Wear safety goggles when using compressed air
to clean parts, as permanent harm to eyes could
result from flying debris.
4. Clean the filter element by dipping it in alcohol or
other cleaning solvent. Blow compressed air
through the filter element (inside to outside) to
loosen surface dirt and to dry the element. If it is
not damaged, the sintered metallic filter element
will last the life of the vehicle.
Wipe out the filter housing with a clean, dry, lint-
free rag. Clean and inspect the O-rings and the
end cap. Replace any parts that are damaged.
5. Install the large O-ring, then the filter element
(small end first) into the filter housing.
6. Install the small O-ring in the end cap, then in-
stall the end cap and tighten it until firm.
CAUTION
A leaking air filter or air lines can cause slow or
hard shifting of the transmission, and eventual
transmission damage.
7. Start the engine, and build pressure in the air
system. Check for air leaks at the filter housing
and air line connections; repair any leaks.
Meritor
NOTE: This procedure does not apply to
FreedomLine transmissions.
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
2. Remove the element from the air filter/regulator
assembly. Inspect the O-rings in the end cap;
replace worn or damaged O-rings. Inspect the
element for fluid contamination. If fluid is present,
replace the element. Inspect the air supply sys-
tem for the source of the fluid, and service it as
needed.
3. Install the element in the filter/regulator assem-
bly.
4. Apply a light coat of silicone grease, or an
equivalent grease to the O-rings in the end cap.
Install and tighten the end cap 10 to 15 lbf·ft (14
to 20 N·m).
5. Build air pressure in the system, check for leaks,
and make any needed repairs.
26–04 Transmission Fluid
Level Inspection
Allison
CAUTION
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmis-
sion.
Do not mix types and brands of fluid, because of
possible incompatibility. Do not use fluid addi-
tives, friction modifiers, extreme-pressure gear
fluids, or multiviscosity lubricants.
Cold Check
Clean all dirt from around the end of the fluid fill tube
before removing the dipstick. Do not allow foreign
matter to enter the transmission. Dirt or foreign mat-
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
Century Class Trucks Maintenance Manual, April 2005 26/5