Question about Husqvarna Chain Saw 20" Bar

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Ryobi 40cc chain saw oiler not working correctly

I have blown the oiler port out with air and cleaned any debris from oiler port, someone suggested running petrol throgh it which I did seemed to come out more but as soon as I added the chain oil it only used about one fifth of the oil to a full tank of petrol? So I am stuck the unit looks like it is sealed inside the oil tank so no idea onto go further with a repair

Cheers

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  • John Clark Jan 26, 2009

    Hi, I have the same problem (Ryobi pcn 4040). Would appreciate guidance on how to strip down the oil tank to carry out repairs.

  • Andy Williamson Oct 01, 2013

    The oil pump drive is plastic far too soft and will only last a vry short time. I recently machined one from brass, works fine. Now I know not everybody can use a lathe but any local machine shop should be able to make one for you this will solve the problem. Easy to change as well. Remove the blade and chain, remove the clutch assembly (left hand thread) and there it is.

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Hi
Check and clean the oil filter from oil tank.Check the worm gear wich engages with the oil piston pump(under the clutch).Near the hole where the oil comes out from oil tank there is an oil tank valve(see if it is clogged),it equalises the presure between interior and exterior of the oil tank.
best reagards savumihai71

Posted on Dec 23, 2008

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You have done what I would have done and have done successfully in the past. If the chain is not sticking or seizing on the bar than you may be O.K. - many saws still have a portion of their chain oil left when the gas tank has run dry. If the chain is not seizing then run the saw in a safe manner with a fairly large piece of clean cardboard under the saw. As you rev the saw moderately look and see if there is any oil being thrown onto the cardboard - if so you may be fine.

If the chain does seize than you may try the petrol/gas mix method again and this time dump the petrol after a few seconds into a container - hopefully this may dislodge any debris that may have gotten into the oil resevoir. You''ll have had to empty the oil resevoir of oil before you try this and lossen the chain with the adjustment provisions of your saw. As a side note, I can say that prolonged running of petrol through the oil pum may damage it.

A final thought - is the weather you are working in extremely cold and if so are you using summer/heavy grade chain oil. This combination may cause or contribute to a lube problem. If I'm correct in this assumption then swiching to winter grade chain lube may work. For a tank or so you could try a 5-30 weight motor oil for a chain lube - don't use it for gas mix though!

Should these suggestions fail a visit to the chain saw shop may be in order as pulling apart the oil tank usually involves dismantling a large portion of the saw.

Posted on Jan 27, 2009

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