Same here with problems, which I have noticed over the last 2 weeks or so.
Parts lists and manuals come on screen as ‘loading’ then show the page 1 illustration but scrolling down to page 2 just shows a blank page and then cannot scroll further down or backwards and so have to exit to get off the page.
Manuals / Parts lists do not open on my laptop (Chromebook) where previously I have never had a problem.
Have tried on phone but same as on laptop, nothing opens.
This is now fixed – the faulty embedded viewer has been removed and replaced with download links to the pdf documents. On most browsers this will open the pdf in the browsers own pdf viewer, but on some it will download the pdf directly to your local device and allow you to read it there.