31 51 010 Replacing radial seal for drive flange of front axle differential

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Special tools required:

Necessary preliminary tasks:

Mark position of nut with respect to shaft with punch marks (arrow).

Lever out lockplate (1) with a suitable tool.

Fig 1: Locating Lockplate

G09849136

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
Do not place special tool on threaded holes of drive flange.

Secure drive flange with special tool 23 0 020 against turning and release nut (1).

Fig 2: Identifying Bolt And Lock Nut

G09849137

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
Mount special tool only with longer screws (M10x30) on drive flange.

Pull drive flange off drive shaft with special tool 33 1 150 .

Fig 3: Identifying Special Tool (33 1 150)

G09849138

Courtesy of BMW OF NORTH AMERICA, INC.

Lever radial shaft seal (1) out of front differential with a suitable screwdriver (2).

Fig 4: Removing Radial Shaft Seal

G09849139

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Drive in radial shaft seal with special tool 31 5 130 as far as it will go.

Coat sealing lips of new shaft seal (1) with front differential oil.

Fig 5: Installing Radial Shaft Seal

G09849140

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
Do not tighten nut beyond punch marks. Otherwise the clamping sleeve will be damaged.

Fig 6: Locating Lockplate

G09849136

Courtesy of BMW OF NORTH AMERICA, INC.

Clean drive flange and attach.

Tighten down nut until punch marks on nut and shaft are aligned.

Install new lockplate (1).

After installation:

Check OIL LEVEL IN FRONT AXLE DIFFERENTIAL , correct if necessary.