I have just acquired a very nice 850 and there are a few things that need doing.
One thing at a time. How do I take the Instrument cluster out to replace the Odo cog? I have done it heaps of times on a 240GL and was hoping this has been written up somewhere with pics.
Cheers,
Dan

Here is the one I referenced when I did mine.

http://www.matthewsvolvosite.com/odometer-fix-how-to.html

It's not a terribly difficult job, but does take some time and patience.
Re. the bulbs, it might be wise to have an extra bulb holder too.
I got mine all apart to do the bulbs and gear and found a broken holder. Had no choice but to get the car back together that day so I still have one bulb out. Not interested in taking it all apart again.

It was nice to fix the odometer. Kind of felt like I gave the car a heartbeat again. I rolled the odometer forward to match what the OBD I box under the hood displayed as the mileage. Took me about an hour turning it by hand to add 15,000 miles or so.

Check youtube also, there are a couple of videos that show how to remove the dash top without breaking any plastic bits. The 1993 has only 2 electrical plugs to worry about.

Normal failure is the small plastic drive wheel in the speedometer. Change out the 4 larger 194 spade bulbs while there and check the smaller bulbs also.

Before you pull the cluster, check the mileage that is stored electronically in the cluster. Put the probe in A-7, push the black button 5 times, wait for the light to come on, push once, wait for the red light, push once, wait for the red light and push twice. The response will be the left 3 digits, 10 blinks of the light = zero.
Do the same thing 5,1,1,1 to get the right 3 digits.

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My back feels better when I sit in a Volvo seat

Try this link:

http://www.matthewsvolvosite.com/odometer-fix-how-to.html

Matthews Volvo Site is a great resource for the FWD and AWD cars. Even has RWD info too..:)

Or do a search here on the BB.

Thanks everyone, doesn't look too bad.
Yeah quite impressed with Mathews site for the 850. I'll ask my next question over there re central locking.
But for the 240 Brick Board rules!
I got my son's 240 running like a Swiss watch as they say, thanks to this place.