MBE 900 – Section 1.5 Rear Radial Seal

Section 1.5
Rear Radial Seal

The crankcase rear radial seal is one of two seals used to retain the lubricating oil in the crankcase.‪

Section 1.5.1
Rear Radial Seal Removal

Remove the seal as follows:‪

FALLING FLYWHEEL ‪
To avoid injury from a falling flywheel when removing the last bolt, hold the flywheel against the crankshaft by hand to prevent it from slipping off the crankshaft. The flywheel is not doweled to the crankshaft.‪

1. Remove the flywheel. See Figure "Rear Radial Seal Location" and refer to "1.10.1 Flywheel Removal" .

   Note: Make sure the crank angle position sensor is not damaged during removal of flywheel.

   

   1. Flywheel‪	3. Crank Angle Position Sensor‪
   2. Rear Radial Seal‪	4. Flywheel Housing‪

   Figure 1. Rear Radial Seal Location

2. Protect the crankshaft with a rag, then using a screwdriver, carefully pry out the radial seal. See Figure "Removing the Rear Radial Seal" .
   

   1. Rear Radial Seal‪

   Figure 2. Removing the Rear Radial Seal

Section 1.5.2
Rear Radial Seal Installation

Install the rear radial seal as follows:‪

Note: Do not lubricate the radial seal.

1. Inspect the contact surface of the flywheel for damage and wear. If it is scored or worn, replace it.
2. Put the new radial seal in place, and using the rear seal installer J-46390 , press the seal into position. See Figure "Installing the Rear Radial Seal" . Make sure the rear seal installer is positioned at the crankcase flange, and press the seal evenly around its entire circumference.
   

   1. Rear Radial Seal‪

   Figure 3. Installing the Rear Radial Seal

3. Check the sealing lip on the radial seal to make sure it is positioned correctly. See Figure "Installing the Rear Radial Seal" .

   FALLING COMPONENT ‪
   To avoid injury from a falling component, ensure a proper lifting device is used.‪

4. Install the flywheel, using the location dowels for positioning. Refer to "1.10.2 Flywheel Installation" .

   Note: Make sure the crank angle position sensor is not damaged during installation.

5. Check the crank angle position sensor for proper positioning.