Oops! Meant to give you these links for the 150. Maybe you have all the info you need but I find these websites very useful even with a service manual.
This is the parts schematics from the New Holland site, lot of info if you play around a little, going to "print assembly" mode on any of the systems gives a real nice schematic and parts list in one. Use the search feature on this page for Versatile 150 and you'll get a link to the loader page too.
Official New Holland Online Parts Store and Online Parts Catalog for New Holland and Ford Tractors.
Below is a PDF for the Perkins 4.236 engine, not Versatile specific most info should apply but not all will, you'll find this engine is used in many many different applications.
http://www.moteur-perkins.com/uploads/catalogue/lettre/notice/manuel-perkins-ld-4-236.pdf
This is the parts schematics from the New Holland site, lot of info if you play around a little, going to "print assembly" mode on any of the systems gives a real nice schematic and parts list in one. Use the search feature on this page for Versatile 150 and you'll get a link to the loader page too.
Official New Holland Online Parts Store and Online Parts Catalog for New Holland and Ford Tractors.
Below is a PDF for the Perkins 4.236 engine, not Versatile specific most info should apply but not all will, you'll find this engine is used in many many different applications.
http://www.moteur-perkins.com/uploads/catalogue/lettre/notice/manuel-perkins-ld-4-236.pdf