SERVICE MANUAL SHIMANO NEXUS 7-SPEED HUB - Avantum
Shimano Alfine 8-speed service - YouTube
I'm going to oil bathe this shimano nexus 7.. the proffesional bike repair person I asked to do this for me sprayed wd40 in it, €80 later I decided to just buy
Shimano Internal Gear Hub Service
Shimano Nexus 8-speed Bicycle Hub Service Manual-Page 12