Slobbering bar and chain oil

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StoneyMeadowMaple

ArboristSite Lurker
Joined
Sep 8, 2024
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Location
Southern VT
Is there any solution to drooling bar and chain oil when storing a saw out of position? I want yo put a scabbard on my tractor and just leave the saw there. Apart from not wanting the huge mess, if it pukes out a tank of B&C every time I use it, that is inconvenient and expensive.
The 365 I would like to use leaves a pool every time it is set out position, it seems to come from the oiler tube under the bar.
 
Usually from the oil tank being pressurized after the saw heats up, or temp changes. Sucks air in but doesn't let any out, so it pushed oil out the oil hole. Just crack the cap and vent it after the saw cools down. Usually solves most of the issue. Basically became a habit of mine after I'm done with a saw. They will always leave a little bit from what's slung around under the cover and in/on the bar, but not near as much.
 
I had a cap leaking once it took days to find what was leaking. Found a tiny (hardly see it) crack in the centre of the oil filler cap. New cap and it never leaked again. The symptoms all pointed to an O ring but it wasnt.
 
When the air in the tank cools and contacts at night it draws in more cool air through the vent.

During the day the air in the tank warms and expands but the one-way valve in the vent prevents it from escaping, so the oil is pushed through the oil pump channel and out the bar oil port.

If you want the saw to not puddle oil, fill the oil tank (minimizing the amount of air) and keep the saw in a constant-temperature environment. Note this doesn't always work, if your oil pump is in the exact wrong position it's basically an open valve depending on the design.

Otherwise get a suction setup and suck the oil out of the tank and put it back in the jug.
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