Author Topic: Poulan check valve fix micro chainsaw  (Read 2051 times)

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Re: Check Valve poulan micro saws
« Reply #10 on: May 13, 2015, 10:30:34 pm »
Update:
I finally got it apart and re-assembled. My bushing was steel not brass. Must have been an earlier version. I filed the crimp off (I don't think it would have helped having it anyway). Used my propane torch to heat up the outside a little, while also using the short leg of a allen wrench that fit in the hole to pry up. Popped up easy then.
Cleaned it all up w/brake cleaner. Inserted the new duck bill and put a little RED Loctite on both mating parts and tapped the bushing tight with a drift pin. 
The only messy part was putting the screen back on with JB weld. When/if I do another one, I'll put the JB Weld around the perimeter of the valve body, and push the screen into it.

I hope this helps anyone else wanting to re-build the check valve. After you've done one, you see what works and what don't, it's really easy. I got the duckbills from my Husky dealer for $1.49 each.

Thanks for the report.  Good job.
PP 505, 475, 445.

Offline Al Smith

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Re: Check Valve poulan micro saws
« Reply #11 on: May 14, 2015, 05:14:52 am »
Good info .I never did know how those things oiled .

I've only got one,an early 1.9 cube with that system .Plus it has a thumb button .Neat little saw .It was my climber before I got the 200T Stihls .

Offline ChipsAhoy

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Re: Check Valve poulan micro saws
« Reply #12 on: December 20, 2016, 09:59:09 pm »
Just an update to my previous post.
I've done several of these now, and have found that a just a very small touch of Aviation Permatex to the duckbill side shoulder when installing it will guarantee a airtight fit. I like to tap the bushing snug but not so tight that I may mess up the small shoulder. After rebuilding one I still didn't have the proper sealing when testing it. I took it apart and added the Permatex, reassembled it and problem solved. I did let it cure over nite before installing it.

I think the screen is more safety net to contain the check valve part/parts if they fail, from having direct access to the crankcase then being a filter.
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Offline Cut4fun .

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Re: Check Valve poulan micro saws
« Reply #13 on: May 09, 2018, 09:06:59 am »
@Todd Loosli   a member here and as has them FS too.   18 shipped. 

Just wanted to save a poulan check valve he made before it gets buried and lost.


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Offline ChipsAhoy

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Re: Check Valve poulan micro saws
« Reply #14 on: May 09, 2018, 04:01:34 pm »
Fantastic, that is ingenious.  8)
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Offline Eccentric

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Re: Check Valve poulan micro saws
« Reply #15 on: May 10, 2018, 05:07:05 pm »
Cool.  I'd much rather pay him $18 for a newly made check valve assy (with a fresh new duckbill within) than pay an eBay parts scalper $30+ for an NOS valve that might well decay and fail shortly after instalation.
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Offline Super360

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Re: Check Valve poulan micro saws
« Reply #16 on: January 07, 2020, 07:57:44 am »
Here is a rebuild of one i did. I just used a sander to sand down the filter.
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Offline Cut4fun .

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Re: Poulan check valve fix micro chainsaw
« Reply #17 on: June 23, 2021, 07:55:56 am »
One brass would budge so put duckbill on top like guys pic above using Threebond 1194.  Oils sweet now.

This one yesterday to try later. I was able to get the brass out. -  Think I know why the redneck fix for check valve for oiling is so much better. Black duckbill is what came out with small hole. Green is new.
Surprised to get one out instead of wad of goo.

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