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).
- 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 for approved transmission lubricants. See Table for lubricant capacities.
- Check and adjust the fluid level using the applicable Eaton Transmission fluid level checking procedure, see .
- 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.
Table 1, Eaton Fuller Transmission Lubricant Capacities
Transmission Speed
Transmission Model1
Lubricant Capacity: qt (L)
5-Speed FS–4205A/B, FS–5205A/B
6.25 (5.9)
FS–6305A/B
9.75 (9.2)
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)
RTLO–16918B
14 (13.2)
Table 1, Eaton Fuller Transmission Lubricant Capacities
Table 2, Eaton Approved Manual and Automated Transmission Lubricants
Lubricant Type1
Temperature
SAE Viscosity
Synthetic transmission lubricant meeting Eaton PS-386 lubricant specification
All
–
- Do not mix types or brands of lubricant.
Table 2, Eaton Approved Manual and Automated Transmission Lubricants
-