The clutch pilot bearing is a roller type bearing installed at the rear of the crankshaft, factory sealed and does not require further greasing, it mainly take the load of the front of the transmission input shaft. This should be done every time the clutch assembly is removed from the engine, and if the existing one is suspected to be worn out, a new one should be fitted. Disregarding the fact, that some procedures are exclusive to vehicles with an engine, when the engine was detached, not all of them might be applicable. First, extract the transmission and then follow this up by that of clutch composites. It is advisable to check the states of the bearing; they should not be in such a state as worn out, scored, less or without grease, dry or damaged; if any of the stated situation is observed, then it will be compulsory to replace the bearing and at this stage, it will be helpful to use a flashlight. It can be pulled out using a claw that is easily available in most auto spare part shops, or a hooked tool in which the hook is placed at the back of the bearing and tapped with a hammer. If nothing can be tapped on, then tighten two vise-grip pliers on the tool and tap on the grips. To install the new bearing, it is necessary to apply a thin layer of lithium based grease on the outer surface of it and then using the soft-face hammer fixing it in the recess. Last but not the least reinstall all the clutches, transmission and all other parts which had been removed during the process and make sure that all nuts and bolts were tightened.