I posted this over on the Ryobi forums, but it has not appeared, so I'll try
My BT3000 has the blade raising issue, lowering seems OK. after doing some
reading, it seems I'm a victim of the dreaded shims. I tried to remove the
arbor guide to look at the shims (both present), but stripped two of the
screw heads. I can probably get them out with an impact screwdriver. I
cleaned the gears that raise/lower the blade and this helps, but it still
jams. If I apply upaward pressure to the back of the arbor guide, the blade
raises OK. The guide seems to have some slop in it from back to front.
Since both shims are still present, is this still likely a shim issue or
I used to have the Ryobi and in fact did have the dreaded shim problem
at one point. It's not so much that the shims disappear, it's the
little tabs that are folded over that hold them in place get bent out
of shape and bind up a little bit. I'd highly recommend going over to
www.bt3central.com and follow their instructions for disassembling the
saw. I disassembled mine, cleaned it up, gently bent the shims back
into shape and the problem was fixed.
The one thing you want to be careful with is raising and lowering the
blade from stop to stop. Don't crank it down so tight that it runs
against the stops.
Had that problem once maybe 5 years ago. Same upward pressure allowing it to
move. At that point the shims had creases in them. Flattened them and cleaned
everything. Seem to recall the issue was a precise adjustment on some set
screws, allowing it to slide but without cocking. After doing this, all was
fine. Usually clean it about twice a year, or whenever I feel any resistance,
just using a toothbrush and some simple green, then a light lube. When
properly adjusted, it raises and lowers easily from one stop to the next, and
haven't had any problems since then.
Suggest www.bt3central.com for more detail. If their advice doesn't help you
fix it, send me an email.
Mine (which was an old one) did not have any loctite. I added some of the
light stuff after I set them. If screws are binding, try wd40 or some thinner
and let soak a bit first. Also make sure the head are clean first. This was a
big issue with the early BT3k's. I don't know how old yours is, or how it's
been maintained, but jammed screws are going to be a really big problems if
you can't get them loose.
On the www.bt3central.com site, try the articles section, under BT3
maintenance, especially Jim Frye's articles.
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