Hi @ladykayak1966 ,
Here’s the 1998 Nissan Quest Service Repair Manual
Click on Contents: Steering.
When you have the file on the screen (select Fullscreen to make it easier to see and use) go to p.ST-22 onwards to view how to disassemble/reassemble the power steering pump.
The others sections of the manual, e.g. engine lubrication & cooling systems and engine mechanical will help you with the others.
There is a download icon at the right side end of the document header bar if you want to download it to your computer
Hopefully this is of some help.
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