10.3 If the rear radial seal on the engine
crankshaft is leaking, replace the rear ra-
dial seal. For procedures, see the engine
manufacturer’s manual.
11. Remove the chocks from the tires.
26-10 Mercedes-Benz
Transmission Fluid
Changing and Magnetic
Plug Cleaning
Draining
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
2. Drain the transmission fluid. See Fig. 19.
NOTE: Drain the transmission fluid while the
transmission is warm.
2.1 Remove the magnetic drain plug from the
bottom of the gear case.
2.2 Discard the aluminum gasket.
2.3 Catch the transmission fluid in a suitable
container and dispose of it properly.
3. Clean the area around the fill plug.
4. Remove the fill plug from the side of the case.
Discard the aluminum gasket.
NOTE: Use a piece of key stock, or any other
convenient steel slug, to short the two magnetic
poles and divert the magnetic field.
5. Clean the magnetic drain plug before installing it.
6. Install the drain plug (p/n A 124 997 01 32) and a
new aluminum gasket (p/n N 00763 024105).
Tighten the drain plug 42 lbf·ft (57 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 transmission
fluid out of the case through the main shaft open-
ings.
1. Add transmission fluid until it is level with the
lower edge of the fill opening. See Fig. 19 for
location of the fill plug and Fig. 20 for correct
level. See Table 8 for approved transmission lu-
bricants and Table 9 for lubricant capacities.
MBT Transmission Lubricant Types
Manufacturer Type
Mobil Mobiltrans SHC 50 (RN 2952
E-2)
Table 8, MBT Transmission Lubricant Types
05/22/2001
f261102
1
2
3
NOTE: The transmission is shown from the left-hand
side.
1. Transmission
2. Fill Plug
3. Drain Plug
Fig. 19, MBT Transmission Drain and Fill Plugs
f260006b
10/05/94
A
B
A. Full B. Low
Fig. 20, Transmission Fluid Level Checking
Transmission26
Business Class Trucks Maintenance Manual, February 200326/20
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