drf255
BAD CAD
I install the seals with 2 stroke oil on them, no sealant. Never a leak (With OEM Seals).
The PTO side lip can make the seal prolapse and lose the spring without the proper tools or using the coke can trick. The fly side keyway notch can cut or damage a tight seal, but I generally put some pressure on the contralateral side so the seal pushes over that area.
The OEM install kits for the seals are invaluable. Worth it IMHO, and multiple models can be worked on with the same tools. It seems that the fly side have 2 depths, with the 1128 series being deeper.
2 questions. Did you install the seals dry? Are the OEM?
I do the Wolfy trick as above. A tiny leak won’t make any difference BTW. We all get OCD about saw sitting for an hour and holding vac, etc... I forget the exact recommendation from Stihl, but it’s less critical than one would expect. Something like pulling 10mm Hg vac and having less than X amount of leak over a minute. Once you actually get a poor runner with a vac leak you’ll understand. Bad runners with enough leak to cause poor running either can’t hold any vacuum, or the needle drops like a lead balloon over a second or two.
The PTO side lip can make the seal prolapse and lose the spring without the proper tools or using the coke can trick. The fly side keyway notch can cut or damage a tight seal, but I generally put some pressure on the contralateral side so the seal pushes over that area.
The OEM install kits for the seals are invaluable. Worth it IMHO, and multiple models can be worked on with the same tools. It seems that the fly side have 2 depths, with the 1128 series being deeper.
2 questions. Did you install the seals dry? Are the OEM?
I do the Wolfy trick as above. A tiny leak won’t make any difference BTW. We all get OCD about saw sitting for an hour and holding vac, etc... I forget the exact recommendation from Stihl, but it’s less critical than one would expect. Something like pulling 10mm Hg vac and having less than X amount of leak over a minute. Once you actually get a poor runner with a vac leak you’ll understand. Bad runners with enough leak to cause poor running either can’t hold any vacuum, or the needle drops like a lead balloon over a second or two.