There are no comprehensive printed manuals because the
set would be huge (one for electronics, one for transmission,
etc.). Volvo used to sell a set but cost was over $1000 for
everything (these may still be available for a 98 at the Volvo
techpubs web site, see below). In fact, my 98 came with the
list of all the manuals in a small book along with the very
high price. Ouch. So, a general purpose manual for
70 series owners is not available as far as I know. The Haynes
is probably pretty good for a 98 since the engine/driveline
did not change much over the 97 850s.
Having said that, here are the resources I use:
Volvo technical publications web site:
https://www.volvotechinfo.com/
All Data. They give you the most important stuff right from
Volvo's docs for $25/year. Anything not here requires very
specific tools or knowledge so I have found this a good
resource. More importantly, it lists the Technical Service
Bulletins and recalls so you know what the problem areas are
The TSBs and recalls are worth the $25 and the info helps you
work with your mechanic in a more knowledgable manner:
http://www.alldatadiy.com
And the best:
http://volvospeed.com/bay13.htm
With alldata and volvospeed you will have almost everything
covered that you might need for regular service and maintenance.
In the end I think you are going to end up printing files
off the computer to get the hardcopy. I keep a binder and
I am slowly building my own manual. To some extent the
maintenace info is dynamic with new TSBs frequently issued
so an online resource has the most "fresh" info (TSBs are often
issued to cover service or problem diagnostic procedures).
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