Thomas SAF-T-LINER C2, Maintenance Manual

Page: 70 / 176

26–02 Eaton Fuller
Transmission Fluid
Changing and Magnetic
Plug Cleaning
IMPORTANT: For oil change intervals, see the
applicable Eaton Fuller Driver Manual or Service
Manual.
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,
www.roadranger.com .
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 brake and chock the rear tires.
2. Drain the fluid while the transmission is warm.
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. Re-
move the fill plug from the gear case.
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).
Filling
CAUTION
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.
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, all areas of each affected
component must be thoroughly drained. Switch-
ing 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 from a petroleum-based lubricant.
NOTE: The correct fluid level is established by
checking at the fill plug opening.
1. Add fluid until it is level with the lower edge of
the fill opening. See
Fig. 1 . If the transmission
has two fill openings, add fluid to the level of
both fill openings. See
Table 1 for approved
transmission lubricants, and Table 2 for lubricant
capacities.
2. Clean the fill plug, then install it in the transmis-
sion. Tighten the plug as follows:
•
25 to 35 lbf·ft (34 to 48 N·m) for transmis-
sions with 3/4-inch pipe threads.
•
60 to 75 lbf·ft (81 to 102 N·m) for transmis-
sions with 1-1/4-inch pipe threads.
Eaton Fuller Transmission Lubricant Capacities *
Transmission Model Capacity: qt (L)
5-Speed
FS–5205A/B 6.25 (5.9)
FS–6305A/B 9.75 (9.2)
6-Speed
Transmission
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