John Deere LT series lawn & garden tractors LT180/LTR180 (010001-) (2002-2005)

Which oil should you use for your John Deere LT series lawn & garden tractors LT180/LTR180 (010001-) (2002-2005)? Complete advice for all components, such as the engine, gearbox (transaxle), brake system, power steering system and cooling system.