The document provides instructions for installing and removing components related to the rear power take-off (RPTO) system on a Caterpillar C9.3 engine. The removal procedure includes removing the crankshaft rear seal, various bolts and gears, thrust washers, dowels, bearings, seals and the PTO shaft. The installation procedure specifies cleaning and lubricating parts before reinstalling components in reverse order, applying thread locking compound to bolts, and torquing bolts to the specified values.