Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: KilliansRedLeo on March 10, 2014, 10:09:51 am
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I have noticed that you can sometimes get air leaks around the plastic carb flange (HVA # 503 71 27-01). Even if the pipe (HVA # 503 96 45-02) is new or in good shape. It appears to me that the plastic flange is the problem. What appears is that the plastic gets a bow in its' surface that mates with the carb and does not force the pipe evenly against the carb to create a seal, possibly from heat or being over tightened. The intake pipe I was using was new.
I had that problem the other day, and removed the flange. Putting the mating surface on a flat surface I could definitely see that the plastic was bowed up in the middle of the flange. Fortunately I had a new one in stock that was flat and that cured the problem. This is a worry some situation since the leak could come at any time or reappear after use. Even if all parts are new.
Wondering if anyone else has seen this or has an explanation for what is going on. Just for laughs I am going to try laying the flange on a flat surface and see if I can get it to flatten out with a little heat.
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Over tightening maybe? Maybe factory issue. What about warming it up on a flat plate in oven?
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Going to try warming but hard to do because the throttle cable guide gets in the way. Perhaps a little compound on a dead flat surface. Who knows.
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Good tip,I,ve vac tested an old 65l
that has a leak aruond the bakelite
heat block also . I will try the flat surface
test ,thanks
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I have not seen this but I have not done a lot of work on this model or series of Huskys.
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Out of all the 362 365 372 rebuilds I did when into this series of saws. I never seen one leak between the carb and intake mount area.
Warped, oem parts?
husky 372 IPL http://www.husqvarna.com/ddoc/HUSI/HUSI2003_AAaa/HUSI2003_AAaa__1062604-63.pdf
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Seems there is a little stainless inner tapered sleeve, cone, or collar 503 43 18-01 that goes inside that plastic adapter before you bolt it up? Never had any trouble on that series. Haven't had one apart in a little over a year. Last year I was doing Dolmars and grinders.
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The ss ring was there!
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I have had 100's of 372's across my bench and never seen a leak at the mounting surface of the carb unless it was over tightened.my guess is you have a bad part and its not typical of that saw.
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I agree, I have done many of that series of saws over the years and have seen two with the same problem lately. Both older saws at least 1998 or older and both from warm climates, MS and GA. It appears that the flange is a cast or injection molded part so should not have a memory, other than bad parts I have no explanation.
One other thought is that I use the factory blocking plates when doing the vac/pressure test, perhaps that may be part of the problem. I have two of those tools for the carb side and tried both with the same result. Also when using the blocking plates you cannot have the ss ring in the intake pipe, so perhaps that is also part of the problem?
Terry, how is your wife doing, if I may so bold as to ask?
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Well, I found it, albeit after the saw blew up.
It seems that the carb boot had an irregular surface (little mold sprews or ****) on the surface. So bad part, however the saw did pass factory leak down and vac tests. Well another jug and piston as well as a new carb boot, flange and SS collar, oh yeah the boot was new aftermarket, never again!
Won't mention where the boot came from; needless to say NO more of those!
Pizzes me off to no end!
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That is not a cheap way to find out.
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I agree but sometimes you get the bear other times the bear gets you. I just want the customer to be satisfied with their saw. Was it my fault, yes definitely, so if it costs money so be it. Still can't figure out how I missed it.
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I agree but sometimes you get the bear other times the bear gets you. I just want the customer to be satisfied with their saw. Was it my fault, yes definitely, so if it costs money so be it. Still can't figure out how I missed it.
You know Tim I have a pair of magnifiers much like a jeweler would use that I put on sometimes so I can inspect things up close and personal. I just wonder if maybe that would have helped you.
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Thank you Roger what you suggest could be, but it was just an oversight on my part! I do not think that it is any big deal just do not like that it happened to a customer! I will look into the jewelers magnifiers you speak of. I actually found the problem while taking the saw apart, felt the little sprews when removing the SS ring and thought, OH NO! Guess what, I will NEVER make that mistake again!
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I always use my magnifiers when rebuilding carbs. It gives me a really good view of any corrosion and dirt in the carb. It also allows me to see the needle and seat height really well.
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Where did you get them and what brand are they? In my old age my vision has diminished to about 10% of normal. Normal being 20/20 mine is at 20/200. Bad but I try to manage. Even the Obama government says that I am blind, ha ha let that sucker run out there beyond my rifle, we will see who is blind!
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Optivisor is the brand I use. They have glass magnifiers and not plastic. You can find them on eBay for around 36.00 dollars plus shipping. There are different magnifications depending on what you want and working distance.
My wife has a pair she uses to thread a needle I believe they are DA 5 magnifiers. I use a stronger one which are DA 8, but you have to be willing to work up close to your eyes with these.
I did watch repair and restoration of pocket watches for 30 plus years and these visors are the industry standard.
I still have a collection of close to 100 pocket watches. Two watch benches, 3 antique stake and sets, a watch lathe, jewel pushers, various tweezers and other tools.
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Here is a link to what I use except these are DA 5 and I use the DA 8. My wife like the DA 5.
http://www.ebay.com/itm/Donegan-OptiVISOR-Binocular-Magnifier-DA-5-2-1-2X-8-/280524222541?pt=LH_DefaultDomain_0&hash=item41508bf04d
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Where did you get them and what brand are they? In my old age my vision has diminished to about 10% of normal. Normal being 20/20 mine is at 20/200. Bad but I try to manage. Even the Obama government says that I am blind, ha ha let that sucker run out there beyond my rifle, we will see who is blind!
I like that.
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Thank Roger, I'll order a pair!
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Optivisor on order! What really frosts my attachments is that I ran a tank through the saw and so did the owner before the leak showed up.
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Wow, watches, that is really cool! I have always had a fascination with fine time pieces. Just really cool stuff. Did you see a special on the history channel a while back about John Harrison who invented the marine chronometer? Very interesting stuff and what a process he had to go through. I believe he is also the guy who came up with the idea of bi-metal rods for tall case clock pendulums to counteract changes in temperature effecting the pendulums' swing.
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Wow, watches, that is really cool! I have always had a fascination with fine time pieces. Just really cool stuff. Did you see a special on the history channel a while back about John Harrison who invented the marine chronometer? Very interesting stuff and what a process he had to go through. I believe he is also the guy who came up with the idea of bi-metal rods for tall case clock pendulums to counteract changes in temperature effecting the pendulums' swing.
I missed that. I read a book called the Art of Brequet and Brequet was the inventor of many of the things that you find in the American railroad pocket watch that was used from about 1890 to 1940. Those pocket watches were at their peak for time keeping, made in the USA and very few countries came close to matching the quality of those watches. The variety of damaskeening is incredible during that time and works of art.
American Waltham was the first company in the world to invent the machinery to make watch parts with close enouph tolerances so that they were interchangable. That was around 1857.
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I wonder what one of those railroad watches would go for today? You could probably buy a 1st generation Rolex GMT Master or perhaps a Daytona for less!
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I wonder what one of those railroad watches would go for today? You could probably buy a 1st generation Rolex GMT Master or perhaps a Daytona for less!
There are some rare ones that would be up there in that range of the Rolex GMT, Daytona, or even the submariner.
Most Railroad watches would fall in the 350 to 1000 dollar range. Your not going to find a Rolex for that.
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I suppose not! The last time my GMT went back to Rolex NYC for work the bill was $1500! Needless to say I don't wear it much anymore. Bought myself some no name cheapie to wear and if it goes south, I throw it away and buy another for 19$.
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I suppose not! The last time my GMT went back to Rolex NYC for work the bill was $1500! Needless to say I don't wear it much anymore. Bought myself some no name cheapie to wear and if it goes south, I throw it away and buy another for 19$.
I have some nice wristwatches too like yourself but since I retired and working outside all the time I do not use them any more. I use my phone now.
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I have one nice watch, the Rolex. The rest are junkers!
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I have one nice watch, the Rolex. The rest are junkers!
Well being a watch collector it is much like chainsaws.
In wrist watches I have Omegas, Breitling, Rolex, Jaeger LeCoultre, Tudor, and a few old Hamiltons.
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What are your thoughts on Breitling watches? Have thought more than once about getting one.
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What are your thoughts on Breitling watches? Have thought more than once about getting one.
The Breitlings are excellent and of course are known for their chronographs. Alot of airplane pilots use them.
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Here is a link to what I use except these are DA 5 and I use the DA 8. My wife like the DA 5.
http://www.ebay.com/itm/Donegan-OptiVISOR-Binocular-Magnifier-DA-5-2-1-2X-8-/280524222541?pt=LH_DefaultDomain_0&hash=item41508bf04d
Those work good when you get serious into hand square filing chain too. ;)
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Here is a link to what I use except these are DA 5 and I use the DA 8. My wife like the DA 5.
http://www.ebay.com/itm/Donegan-OptiVISOR-Binocular-Magnifier-DA-5-2-1-2X-8-/280524222541?pt=LH_DefaultDomain_0&hash=item41508bf04d
Those work good when you get serious into hand square filing chain too. ;)
Yes I have used them for chain also.
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If anyone wants to know where the carb boot that probably will cost me $250 56$ shipping two ways plus 110$ for a new C/P and 28$ for the OEM part, not to mention doing the work twice, once for free) (as well as pizzed off my customer) came from send me a PM. I will post a picture of the faulty part be Friday. I am going to send it back to the vendor with a mild complaint and see what happens.
If anything good or bad comes of the complaint I will post that also!