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
convenient 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
NOTICE
Operating a transmission with the fluid level
higher or lower than recommended can result in
transmission damage. Do not overfill the
transmission; 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
modifiers. If switching from a petroleum-based
lubricant 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.
NOTE: The correct fluid level is established by
checking at the fill plug opening (manual and
automated).
1. On manual and automated transmssions, add
fluid until it is level with the lower edge of the fill
opening. If the transmission has two fill openings,
add fluid to the level of both fill openings. See
Table 1 for approved transmission lubricants.
See
Table 4 for lubricant capacities.
2. Check and adjust the fluid level using the
applicable Eaton Transmission fluid level
checking procedure in
Group 26.
3. Clean the fill plug (if applicable), then install it in
the transmission. Tighten the plug as follows:
• 25 to 35 lbf·ft (34 to 48 N·m) for Eaton
Fuller transmissions with 3/4-inch pipe
threads.
• 60 to 75 lbf·ft (81 to 102 N·m) for Eaton
Fuller transmissions with 1-1/4-inch pipe
threads.
Eaton Fuller Transmission Lubricant Capacities
*
Transmission Model
†
Lubricant
Capacity:
qt (L)
5-Speed
FS–4205A/B, FS–5205A/B 6.25 (5.9)
FS–6305A/B 9.75 (9.2)
6-Speed
FS–5406A 9.75 (9.2)
FS–6406A, FSO–6406A 9.75 (9.2)
FO–6406A, FO-8406 10.5 (10.0)
FSO–8406A 9.75 (9.2)
7-Speed
T–14607A/B 18 (17.5)
TX–14607B 18 (17.5)
9-Speed
RT–6609A 6 (5.7)
RT–8709B 13.0 (12.3)
RT–8608L 13.5 (12.7)
10-Speed
FR–9210B 11.75 (11)
FRO–14210C, FRO–15210C 11.75 (11)
RT–8908LL 14 (13.2)
RTO–10910B AS2 13 (12.3)
RTO–11908LL 14 (13.2)
11-Speed
RTO–11909ALL 14 (13.2)
13-Speed
RTLO–14913A 14 (13.2)
18-Speed
RTLO–14918B 14 (13.2)
Transmission 26
Business Class M2 Plus Maintenance Manual, 02/10/2023 26/5
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