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Crank bearing fun

Justin Taylor

Justin Taylor

ArboristSite Guru
Joined
Dec 21, 2018
Messages
724
Location
Minnestoa
I bought a ms 291 in pieces and it looks like the crank bearings Went went out but the last guy took off the otter race so I’m now stuck with this I’m guessing the only way I’m getting this off is with a puller but if anyone else has any ideas let me know.
 

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Trailsawyer

Trailsawyer

ArboristSite Lurker
Joined
Oct 13, 2012
Messages
38
Age
73
Location
SW Washington
You might find a puller that will get a grip on the bearing race...... but I would try heating the old bearing race with a torch. If you stand the crank on end, nut resting on the workbench, and apply heat, the race will probably fall off! You don't want to use enough heat to get the crank hot. If the first attempt doesn't work, let it cool completely, and then....?
 
cuinrearview

cuinrearview

Red saw lover
Joined
Oct 24, 2014
Messages
9,146
Age
43
Location
Hillsdale, MI
The only way to fly... 63662_W3.jpg 20200607_122436.jpg
Slicker than **** even if the bearing is whole.

One time I had a bearing come apart and the outer race stay in the pocket. It was old saw so heat wasn't even moving it. Had to get creative with a puller and some round stock on that one.
 
Huskybill

Huskybill

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May 21, 2018
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I’ve collected just about every puller known to man, a Hf 12 ton press, a arbor press. When I was working I used their equipment. Now retired I lost that advantage.
 
Bob Hedgecutter

Bob Hedgecutter

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Jul 18, 2019
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Small Town, way down South- New Zealand.
I take my dremel cut off wheel and cut a slot in it. When it has a nice slot, whack it with a cold chisel/BFH and it will break the rest of the way through. You can tap it right off then and clean up the area for the next bearing
If it cannot be fixed with a BFH...... then you have an electrical problem. ;) :laugh:
 
Huskybill

Huskybill

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If it cannot be fixed with a BFH...... then you have an electrical problem. ;) :laugh:
Get the 16 lb sledge hammer. Two thousand degrees of liquid torch may work too.? Lol

I had to remove a wheel hub on a gravely tractor and used 2000 degrees of liquid heat. Once off it sizzled in the snow for 30 minutes.
 
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