To do the seals or not to do the seals

logfrog

So I have my 064 taken down to do a 066 big bore rebilled. I have a gaskit on the way from Bailey's. Newguy18 gave me a web site with the shop manual. I don't have the tools to pull the fly wheel off I can take the clutsh off. The saw ran, so I'd say they are fine but the last rebilled was in 1988ish. I'd hate to brake something fixing what is not broke. So what do you think???

newguy18

if it were me,i'd do the seals,i've also done literally hundreds of rebuilds,if it ran okay,leave the seals alone,its real easy to screw them up.I can tell you how to pull the flywheel without a puller,but it got me flamed on another forum so if you wanna know how,pm me.Since your doing a rebuild,pull the clutch,change the rim or sprocket,change that bearing too,i tried to pack one once being cheap,it blew apart and broke the clutch shoes.Its a 3 dollar part,better safe than sorry.

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logfrog

The bearings feel good. The crank has no play and spins freely.

rbtree

hundreds of rebuilds? and you're how old?

Weren't you bashing on the flywheel to get it off? Not a good thing. Easy to mess things up. Didn't lakeside and others correct ya?

I've packed lots of clutch bearings, and do it often. And replace them now and then too, as they're cheap. I've had just a few wear out, and been running saws for twice as long as you've been breathing the pure and fresh. This is because they wear slowly, as the only time the bearing turns is when the saw is idling.

newguy18

No,i was talking about the sprocket bearing,the little needle cage bearing.You have to remove the seals to replace the main bearings.

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newguy18

Yes hundreds of rebuilds,i've been working on them since i was 12,no i don't beat on them and regardless,lake was and still is wrong,my way can be done quite effectivly and without damage if your careful.I've only packed one clutch bearing,it blew and the clutch shoes literally blew out because of it,they're only like 3 bucks so i replace them.I've done more since i was 12 then most people do in thier lives,and i still got about 20 years or so left in me.

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rbtree

What condition were the jug and piston in? Was the saw running smoothly? If good, there may be no reason to change the seals. A pressure and leak down test could confirm the presence of air leaks.
If all is well, there's no need to pull the flywheel.

rbtree

shows what lakeside knows....LOL...... actually, it's plenty. I'll have to talk to him, i know he remember's ya.....

I have bashed on a couple flywheels, didn't know any better.....lucked out I guess. How do you remove them without a puller? I might tear into my old 335 that was such as strong runner. The jug looks fair..but the bearings are toast.

That needle bearing didn't blow apart because you greased it, it just musta been its time to go.......

That's one reason I like outside sprockets, easier to change them and grease the bearing.

newguy18

I know,but i learned from that experiance to just replace the dang bearing,yes i'm sure lakeside remembers me,Tell him i said hi.I pull the flywheel with a large screwdriver,but it must be wrong because everyone over there says theres only one way of doing things,they'll also tell you that you can't sand the scores out of some pistons and reuse them,i've done that several times and everything i've done it to is still running strong.I've worked on everything shy of airplanes jets and helicopters,and thats only because none have ever come my way.I also won't go one a plane for one reason,everything i've ever driven or ridden in i've had it break down and had to fix it,hence me reason for not going on a plane.

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rbtree

Actually, a lot of folks save pistons...but why? relative to a cylinder, they're cheap.....and do wear..which creates piston slap.

That said, long before you were around there was Dennis Greffard, who modded saws and put on a couple log shows. A lot of us AS junkies met there, way north in the British Columbia wilds. He built my 488 Shinny, which I'd gotten on eBay. It had a badly scored piston and jug. He cleaned up both..and it's still running, 6 years later...I don't use it much.....I'd actually bought a new kit for it..but he didn't wait to me to send it to him......I oughta sell it back to the parts housea or try to unload it on ebay...If and when the saw dies, it won't be worth rejugging.....

How'd you come to do so dang many saws, did your dad have a saw shop?

rbtree

Here's why you should use the proper tool for flywheel pulling....no screwdrivers or hammers:


from Scott of "The Cutting Edge" who sells me Dolmars and parts, and some responses:

Well you all know Im working on resurrecting a Dolmar KMS4 actually thank to Curt I have a parts saw as well "Thanks Curt". With both of these saws previous owners had done Oiler repairs which meant they had to pull the Fan/Flywheel assembly. DOLMAR as well as Stihl dealers DO HAVE or have Access to the PROPER TOOLING to remove the flywheel PLEASE CALL BEFORE YOU USE A VISE OR HAMMERS AND PRYBARS!!!!!!!!!!!!!!!!!!!!!!!!! Parts for these saws are VERY hard to get Please do not try to destroy them!!!!!!!!!!!!!!!! Also when using screwdrivers on the fasteners PLEASE use the PROPER size screwdriver for the job so as not to ruin the fastener!!! Now ill get back to work now that I have Vented..........

Quote:
Originally Posted by LarryTheCableGuy
Hey, don't be hatin' on my heat wrench!

Just kidding. I'm all about using the correct tool for the job.

Also, as long as you are going to be using the correct size screwdriver, take some time to dress the ends once in a while and square 'em up. It makes such a difference.

.

You can do that? I thought that was like tearing the tags of a mattress a swat team would come and throw you in jail or somethin. Mech'n on airliners learned just how cool the right good quality tools work.
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Quote:
Originally Posted by LarryTheCableGuy
Hey, don't be hatin' on my heat wrench!

Just kidding. I'm all about using the correct tool for the job.

Also, as long as you are going to be using the correct size screwdriver, take some time to dress the ends once in a while and square 'em up. It makes such a difference.

.

You can do that? I thought that was like tearing the tags of a mattress a swat team would come and throw you in jail or somethin. Mech'n on airliners learned just how cool the right good quality tools work.
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Scott

logfrog

The ext. side of the piston started to go, but not that bag.

newguy18

No my dad never owned a shop,it was a backyard thing i did when i lived in ohio,I have many,many hours turning wrenchs,heres a job i did,i'll see if you can figure out,i spent a nickel to fix a car,and made 300 bucks.What did i do?
As for stihl needing a proper puller,i've pulled the flywheels of off an 026,s-10,and other models using a screwdriver without incident,its how i was taught from a long line of mechanics so that how i'll continue to do it.This thread has been hijacked so lets stop here or start another thread rb.

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Eric Frei

Is there one universal flywheel puller or does every saw manf and model etc needs it's own unique one?

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TrevMcRev

<On NewGuys Behalf>

Yes




Sorry, couldn't help myself

Attached Thumbnails

 

newguy18

They have differnt sizes for differnt flywheels,some of them that have threaded holes in them i use a harmonic balancer puller on,but for the most part a screwdriver,thanks trev.

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old schooler