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stewmo

200t does it have an oil tank vent?

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Wondering if the oil tank has a vent that could get clogged? Or does it rely on the pump pulling oil through?

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breather one way valve is in the bar mount if I remember correctly.  If you remove the chain and bar you should see it. 

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Any tank that has fluid drawn from it needs a vent to allow air to replace the fluids removed. The MS200T oil tank vent is under the upper nylon chain buffer on top of the bar mount. You will need to remove the buffer, remove the oil cap and get a bit of pressure from something like an air line on the vent and a bit of WD40 or carb cleaner to shift any issue.

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9 minutes ago, spudulike said:

Any tank that has fluid drawn from it needs a vent to allow air to replace the fluids removed. The MS200T oil tank vent is under the upper nylon chain buffer on top of the bar mount. You will need to remove the buffer, remove the oil cap and get a bit of pressure from something like an air line on the vent and a bit of WD40 or carb cleaner to shift any issue.

I was close at least. ;)

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You can also bash it in to the tank with a suitable drift and fit a new one if you are that way inclined!

 

....Yes, close:thumbup:

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Thanks a lot. I'll check it out.....can't quite see what else could be the problem....it draws oil but very slowly

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Partially blocked pick up filter, partially blocked oil pump, semi worn oil pump - is the pump on maximum setting? The worms are pretty indestructible but worth checking! 

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On 12/07/2018 at 19:25, spudulike said:

Any tank that has fluid drawn from it needs a vent to allow air to replace the fluids removed. The MS200T oil tank vent is under the upper nylon chain buffer on top of the bar mount. You will need to remove the buffer, remove the oil cap and get a bit of pressure from something like an air line on the vent and a bit of WD40 or carb cleaner to shift any issue.

Hi Spud

 

Just for clarity do you mean some pressure to the vent from inside the oil tank or from the outside, under the chain buffer?

 

Cheers

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These vents tend to get plugged. They only operate one way so you need to use an airline on the outside of the vent to blow any shyte that could be blocking it inwards in to the tank. You can use a soft pipe over the vent to see if it is allowing air in to the tank but sealing under vacuum. 

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Emptying the tank of oil and rinsing with some sort of solvent or petrol solves many  non-oiling problems! does anyone else find that chain oil can become a bit jelly-like after a while in the tank?

 

Also, more modern saws seem to be really sensitive to what chain oil you use! I have a MS201T-CM in which I use Stihl Synthplus oil - very runny. The saw runs like a dream and I have the flow set right on the E mark. At work I use an identical saw but the oil we use is a more traditional style, thick, stringy stuff. We've had no end of problems with saws non-oiling and have to have the flow on full blast just to get anything down the bar!

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