B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 001-023   Crankshaft Seal, Front

Front Crankshaft Seal

The front crankshaft seal is mounted in the front gear cover. A double-lipped Teflon™ seal is used. The sealing surface on the crankshaft must
be clean and free of lubricating oil during assembly.

Remove the drive belt. Refer to Procedure 008-002.

NOTE: Removal is easier if the vibration damper is loosened before removing the belt.

15 mm

Remove the vibration damper. Refer to Procedure 001-052.

Remove the front gear cover. Refer to Procedure 001-031.

While supporting the gear cover, remove the oil seal from the gear cover. Drive the oil seal from the backside of the cover toward the frontside of the cover.

Clean the gear cover seal bore and the crankshaft surface of all oil, dirt, and seal residue.

Inspect the crankshaft for excessive wear.

NOTE: If the crankshaft has excessive wear, a service wear sleeve is available.

Oil Seal Installation Tool, Part No. 3824498

Leave the plastic pilot installation tool in the lubricating oil seal.

Position the seal on the service tool, Part No. 3824498, with the lubricating oil seal dust lip facing outward.

Apply a bead of Loctite 277, or equivalent, to the outside diameter of the seal before installation.

NOTE: Properly support the front cover lubricating oil seal flange to prevent damage to the lubricating oil seal and front cover.

Press the lubricating oil seal into the front cover from the backside of the cover toward the frontside of the cover.

Press the lubricating oil seal until the service tool bottoms against the front cover.

Apply a thin bead of Three-Bond™ to the cover side of the front cover gasket only.

NOTE: Do not remove the plastic seal pilot tool from the lubricating oil seal at this time. Use the plastic seal pilot tool to guide the seal on the crankshaft.

Install the gasket and front gear cover on the engine. Refer to Procedure
001-031.

NOTE: The front gear cover capscrews must be tightened within 15 minutes of applying the sealant on the gasket.

Tighten the front gear cover mounting capscrews.

Remove the plastic pilot tool from the crankshaft.

Install the vibration damper. Do not tighten the capscrews to the correct torque value at this time. Refer to Procedure 001-051 or 001-052.

Install the drive belt. Refer to Procedure 008-002.

Tighten the vibration damper capscrews.