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December 10, 2018, 12:56:15 PM
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  Crank Bearing puller
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   Author  Topic: Crank Bearing puller  (Read 282 times)
oly_man
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Crank Bearing puller
« on: June 11, 2018, 03:56:21 PM »
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What are people using to pull crank bearings off?  Most engines I have done were easy, as I now realize were all smaller on average (440 and smaller).  My 640 needs one popped off and my puller set wont do it.  Bearing measures ~3" O.D..  Opinions on this puller set?  I wonder if "up to 3" diameter bearings" will do it or not.
https://www.amazon.ca/OTC-4527-Pressure-Bearing-Splitter/dp/B0046Z7EJK

Or do I  need the next size up?  It's a 4" max bearing diameter.  Overkill?
https://www.amazon.ca/OTC-4526-Heavy-Duty-Pressure-Splitter/dp/B004FZ9CPU/ref=pd_lpo_sbs_263_t_1?_encoding=UTF8&psc=1&refRID=84X1PSX9N2GS5BF42ATM
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Green and Gold
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Re:Crank Bearing puller
« Reply #1 on: June 12, 2018, 07:35:38 AM »
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https://www.harborfreight.com/automotive-motorcycle/pullers/bearing-separator-and-puller-set-62593.html

I’ve used and abused the Harbor Freight models for 20 years.      Misused em to unload torsion bars on a Chevy Blazer;  have applied an impact wrench at 500 foot pound.  Over the years managed to bow a few of the bolts that pull the bearing separator together and one of the main puller bolts has a slight angle to it now.      They've pulled many a  crank bearing and still do just fine.

The fit and quality of my  few OTC pullers are a bit nicer.    The HF is ¼ the price.  The large bearing separator will work to pull 62/65mm bearings, but you might tweak a few of the side bolts.

Don't know how much other stuff you work on, but what would be handy in my shop is a puller of similar design with a H assembly (the large, heavy cross bar) with a 12 to 16 inch span (or larger).    Could use it to pull belt pulleys and the like from lawn mowers, tillers, cars etc..  Often dealing with that task and have to get creative.....usually wind up damaging the pulley.       


« Last Edit: June 12, 2018, 07:43:48 AM by Green and Gold » Report to moderator Logged
rkalter
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Re:Crank Bearing puller
« Reply #2 on: June 12, 2018, 08:22:22 PM »
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Hi Vince. I have the pullers I think you need. I can send some pics if you like. One of mine came from princess auto the other is a Mac tool.
Ray
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1970 Skidoo TNT 292 Ratsled
1971 Skidoo TNT 340
1971 Skidoo TNT 775
1976 Skidoo RV340
1996 Skidoo Formula III 600
2008 Skidoo Renegade 600 sdi
oly_man
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Re:Crank Bearing puller
« Reply #3 on: June 14, 2018, 11:07:54 AM »
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Thanks again guys.  Good info there G&G as always. 
The HF puller you were talking about maxes out @ 62/65mm (2.5"), which is just a little too small for the 640 crank bearing.  That thing has a 6203 (if I recall correctly) bearing which is at least 3" O.D. and my puller which is about the same as the HF you mentioned.  My existing puller came from Princess Auto too Ray and its the biggest one they sell.  If your other one is bigger it might do the job. 



I don't use pullers every day by any means but I'd say that I wouldn't be buying this for just a one time deal and then never again.  It would be nice to have the pullers that were made for these engines, but those are REALLY few and far between.

I don't want to put you out Ray.  I will likely try the first one I posted the link for.  Hopefully works fine for this thing.

Cheers lads and thanks again
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oly_man
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Re:Crank Bearing puller
« Reply #4 on: June 14, 2018, 04:03:31 PM »
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Correction that's a 6306 bearing.

Dimensions - d (inside diameter)    30mm
Dimensions - D (outside diameter)    72mm
Dimensions - B (width)    19mm
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oly_man
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Re:Crank Bearing puller
« Reply #5 on: June 15, 2018, 09:44:23 AM »
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So I got a little creative last night.  Took the puller I already that was "too small".  Ended up grinding some angles into the once flat spots, so that it could engage a larger diameter bearing.  THe throat was plenty big enough but it just couldn't open up enough nor get behind a larger bearing.  So once I did the grinding (crudely) I picked up some longer 1/2" bolts and the bearing popped out very easily.


Then just put a few short carriage bolts into the splitter so my normal pullers could bring it off the crank.



Now I can focus on getting the cylinders measured....
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rkalter
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Re:Crank Bearing puller
« Reply #6 on: June 16, 2018, 07:37:50 AM »
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That's awesome Vince. I have one that is very large. Will likely remove a five inch bearing. The body on it is 12 inches wide and bolts are 5/8 diameter fine thread. I used it on my 775 and it dwarfed the little 3 inch bearing lol.
Ray
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1970 Skidoo TNT 292 Ratsled
1971 Skidoo TNT 340
1971 Skidoo TNT 775
1976 Skidoo RV340
1996 Skidoo Formula III 600
2008 Skidoo Renegade 600 sdi
oly_man
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Re:Crank Bearing puller
« Reply #7 on: June 17, 2018, 07:10:23 AM »
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Quote from: rkalter on June 16, 2018, 07:37:50 AM   

That's awesome Vince. I have one that is very large. Will likely remove a five inch bearing. The body on it is 12 inches wide and bolts are 5/8 diameter fine thread. I used it on my 775 and it dwarfed the little 3 inch bearing lol.
Ray

Ha! that's awesome!  Thanks again for the offer of borrowing it too.
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