cuinrearview
Red saw lover
Unless that oiler line is leaking I'd leave it all where it is. You can unbolt the oiler and kind of swing it out of the way to clean and check the seal for leaks if needbe
Unless that oiler line is leaking I'd leave it all where it is. You can unbolt the oiler and kind of swing it out of the way to clean and check the seal for leaks if needbe
You're gonna need the clutch on tight to seal off the worm gear bushing when doing your vacuum test
You could remove the springs and shoes from the clutch. Without it being tight, air can be pulled through between the crank and bushing while pulling vacuumI took the clutch off I was under the impression it needed to be off for the test. How will I see a leak if it's on there? Thanks
I don't think so... This is an 034 NOT an 044 with the built in leak through the worm gear sleeve. I just pressure/vac tested my 034S without the oil pump (or clutch) even on the machine. I believe that the 034 crankshaft PTO stub is smaller hence the seal is directly on the shaft like little brother 026.You're gonna need the clutch on tight to seal off the worm gear bushing when doing your vacuum test
Could be. I just saw it in his pic and thought it had the same bushing like an 044I don't think so... This is an 034 NOT an 044 with the built in leak through the worm gear sleeve. I just pressure/vac tested my 034S without the oil pump (or clutch) even on the machine. I believe that the 034 crankshaft PTO stub is smaller hence the seal is directly on the shaft like little brother 026.
You're gonna need the clutch on tight to seal off the worm gear bushing when doing your vacuum test
I don't think so... This is an 034 NOT an 044 with the built in leak through the worm gear sleeve. I just pressure/vac tested my 034S without the oil pump (or clutch) even on the machine. I believe that the 034 crankshaft PTO stub is smaller hence the seal is directly on the shaft like little brother 026.
044/ms440 utilize a different style worm gear bushing than 1125s. The 044 style bushing is stepped and the pto oil seal seals around it. Proper torque with the clutch is essential when pressure/vacuum testing. It can still leak (a bit) when things are torqued, so we pack it with grease and figure any tiny leaks can be tuned out. The bushings are known to crack as well.Steve, educate me on this.
Built in vac leak?
Have not been inside 044/046 yet. Don't have any until next week.....FREE!
Steve, educate me on this.
Built in vac leak?
Have not been inside 044/046 yet. Don't have any until next week.....FREE!
Ok I cranked it up to 7 psi and in 3 minutes it went down to just a tick above 6. Spraying bubble water but not seeing any bubbles. After 4 minutes it's still at 6. Is it supposed to not go down at all? What's my next step?
Edit: I tightened the hose barb down and now it only moved a tiny bit below 7 in a couple minutes, barely moved at all.
Ok I cranked it up to 7 psi and in 3 minutes it went down to just a tick above 6. Spraying bubble water but not seeing any bubbles. After 4 minutes it's still at 6. Is it supposed to not go down at all? What's my next step?
Edit: I tightened the hose barb down and now it only moved a tiny bit below 7 in a couple minutes, barely moved at all.
It has been several years since I rebuilt my 044 so all of this is from my failing memory! Looking at the 044 IPL the PTO seal seals between the oil pump worm bushing which installs directly over the crankshaft. It is advised to put some thick grease between the crank and the inside of the oil pump bushing to slow down any leak. When you see this design you'll shake your head and wonder why?
Sounds like you passed your vac and pressure test, at least to me. When you eventually get a saw with a leak, you’ll get the “aha” moment of what it’s like. The Stihl manual calls for a less stringent test than we all do. I can’t recall the actual number, but it’s something like 8mm of Hg for 60 seconds. Can just say, any saw I’ve had that acted like it had a leak (but still ran ok) couldn’t achieve any vacuum or dropped like a lead ballon in under 10 seconds.
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