after changing to a synthetic from a petroleum-
based lubricant.
4.
Clean the fill plug, then install it in the transmis-
sion. Tighten the plug 42 lbf·ft (57 N·m).
26–02 Eaton Fuller
Transmission Fluid
Changing and Magnetic
Plug Cleaning
Eaton Fuller has a complete listing of approved lubri-
cants for its transmissions on its internet website.
Refer to the Eaton website for additional information,
Draining
IMPORTANT: Manual transmissions filled with
approved synthetic lubricants require a lubricant
drain and fill, and a magnetic plug cleaning
every 500,000 miles (800 000 km), regardless
of the service or vocation of the vehicle. Manual
transmissions with petroleum-based lubricants
require a lubricant drain and fill, and a magnetic
plug cleaning at each Maintenance 2 (M2) inter-
val. All transmissions, regardless of lubrication
used, also require a check of the transmission
breather at each Maintenance 1 (M1) interval.
1.
Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
2.
Drain the fluid while the transmission is warm, as
follows.
2.1
Clean the area around the drain plug(s).
Remove the drain plug(s) from the gear
case.
2.2
Clean the area around the fill plug or the
dipstick tube. Remove the fill plug from
the gear case, if applicable.
3.
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.
4.
Install and tighten the drain plug(s) 50 lbf·ft (68
N·m).
5.
For Procision transmissions, change the lubrica-
tion filter as follows:
NOTICE
To prevent damage to the threads, use hand tools
to remove the lubrication filter housing. When in-
stalling the housing, hand-tighten it prior to final
torque.
5.1
Remove the lubrication filter housing from
the clutch housing.
5.2
Remove the lubrication filter cartridge and
the lubrication filter housing O-ring.
5.3
Install a new lubrication filter cartridge.
5.4
Install a new lubrication filter housing
O-ring, and lubricate it with an approved
lubricant; see
5.5
Hand-tighten the lubrication filter housing,
then torque it 20 to 24 lbf·ft (27 to 32
N·m).
Filling
NOTICE
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the transmis-
sion; overfilling will force fluid out of the case
through the main shaft openings. Fluid overflow
may also drain onto the clutch or clutch brake,
causing additional problems.
IMPORTANT: Do not mix types of fluid, because
of possible incompatibility. Do not use multi-
viscosity fluids or EP (Extreme Pressure) gear
fluids. Do not use fluid additives or friction modi-
fiers. If switching from a petroleum-based lubri-
cant to a synthetic lubricant, all areas of each
affected component must be thoroughly drained.
Switching to a synthetic lubricant, when a
petroleum-based lubricant has been used for
50,000 miles (80 000 km) or longer may affect
transmission performance. Monitor all seal
areas for the first 10,000 miles (16 000 km)
after changing to a synthetic lubricant from a
petroleum-based lubricant.
Transmission
26
Business Class M2 Maintenance Manual, March 2016
26/4
Property of American Airlines
