Author Topic: Poulan pro 5020 PR5020 Poulan 5020 4818  (Read 13177 times)

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Offline 660magnum

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Re: Poulan pro 5020
« Reply #140 on: April 22, 2015, 12:26:53 pm »
I've sanded bases down to a certain dimension with sand paper on a glass pane. I take preliminary measurements on each corner and attempt to get each corner reduced by the desired amount and the entire surface flat. It takes a little more pressure towards one corner or the other.
 
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Offline 3000 FPS

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Re: Poulan pro 5020
« Reply #141 on: April 22, 2015, 01:00:41 pm »
I've sanded bases down to a certain dimension with sand paper on a glass pane. I take preliminary measurements on each corner and attempt to get each corner reduced by the desired amount and the entire surface flat. It takes a little more pressure towards one corner or the other.
 

I sand in a figure 8 and rotate the base as I go.  I have never had a problem with it being uneven.
PP 505, 475, 445.

Offline 3000 FPS

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Re: Poulan pro 5020
« Reply #142 on: April 22, 2015, 01:02:48 pm »
Here is a picture of the sanding drum I made sitting in the cylinder of the 5020.  As you can see it is not wide enouph for the cylinder because it was originally made for a 295 cylinder.  The bearing size looks to be the same.

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Offline 660magnum

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Re: Poulan pro 5020
« Reply #143 on: April 22, 2015, 01:22:12 pm »
Neat tool
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Offline Cut4fun .

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Re: Poulan pro 5020
« Reply #144 on: April 22, 2015, 01:50:23 pm »
Redneck Award goes to Roger.   ;)




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Offline Chris-PA

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Re: Poulan pro 5020
« Reply #145 on: April 22, 2015, 02:31:17 pm »
I don't know about the 5020 bearings, but the diameter of the rubber coated bearings for the 42cc family is different than that used in the 295.

Offline 660magnum

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Re: Poulan pro 5020
« Reply #146 on: April 22, 2015, 02:47:01 pm »
I like the idea of using the print back technique and observing the lines left on the rubber bearing jacket from the original seam between the cylinder and the pan or bearing cap to make the new bearing pockets.

On a MS250 there is the bearing pocket, the seal pocket, and then the seal lip. That makes it more difficult to recess the crank to decrease the squish. The combined seal/bearing takes half the work out of it.
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Offline 3000 FPS

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Re: Poulan pro 5020
« Reply #147 on: April 22, 2015, 03:05:14 pm »
I like the idea of using the print back technique and observing the lines left on the rubber bearing jacket from the original seam between the cylinder and the pan or bearing cap to make the new bearing pockets.

On a MS250 there is the bearing pocket, the seal pocket, and then the seal lip. That makes it more difficult to recess the crank to decrease the squish. The combined seal/bearing takes half the work out of it.

I believe the Husqvarna 455 is the same.
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Re: Poulan pro 5020
« Reply #148 on: April 22, 2015, 03:06:03 pm »
Redneck Award goes to Roger.   ;)






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Offline Chris-PA

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Re: Poulan pro 5020
« Reply #149 on: April 22, 2015, 03:38:28 pm »
I've wondered how much vibration damping and how much movement the rubber coating allows?

 

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