Engines use a crankshaft to transfer power generated by combustion to either an axle or drive rod. To transfer power, an engine uses numerous seals to prevent lubricant from leaking out at the junction of the crankshaft and engine. When a seal fails or the crankshaft is damaged and must be replaced, you need certain tools to fix the seal. Guide Plate You need a guide plate to align the crankshaft and the connection point to the engine. Guide plates ensure the crankshaft and engine are introduced in an exacting manner and that the seal is installed at the correct point. Pull the seals over the guide plate into the spot where it's designed to fit in the apparatus. Once you slide the seal along the cylindrical form of the crankshaft, to where the outer bearing meets the engine, the adapter will pull the seal off the guide plate and into its designated groove. Adapter The adapters release the sealing element from the guide rail and into its designated groove in the crankshaft's outer bearing. Once placed, the adapter creates a seal between the crankshaft opening and the engine. This prevents any leakage at the junction. Unlike the guide plate, you should place the adapter over the outer end of the crankshaft, where it acts as a buffer between the seal, the guide plate and the crankshaft-engine connection. Press The press is the only part of seal installation that doesn't remain a permanent fixture in the crankshaft assembly after use. It compresses the seal between the guide plate and the adapter so the machine screws can be placed as you hold the compression. This ensures certain parts (those the seal prevents from leakage) are compressed to the correct pressure before the entire assembly is tightened down. You can then turn the engine over to test the crankshaft's function.
Source:
