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Author Topic: 034 Rebuild  (Read 2219 times)

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Re: 034 Rebuild
« Reply #10 on: January 28, 2020, 11:23:56 am »
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Re: 034 Rebuild
« Reply #11 on: January 28, 2020, 11:36:50 am »
Was experimenting with photo size.  The last one was resized to thumbnail but still very large.  Guess that will have to do.  Have several other looks of piston and inside jug.  Maybe I can get away with just cleaning the jug and piston.  Any thoughts. 

Also, how do I post up thumbnails that can be expanded.  Hate throw these huge photos up. 
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Re: 034 Rebuild
« Reply #12 on: January 28, 2020, 12:36:36 pm »
Next ques. would be how do I drift/press that piston pin out??  Do not have any special tools. 

Later
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Re: 034 Rebuild
« Reply #13 on: January 28, 2020, 02:47:03 pm »
Remove circlip or both. I used to use a punch that fit outer edges.   Now I got right tools.
Redneck trick a guy told me he does. Use a wood dowel rod.

Also cylinder looks clean. 

I use Berrymans B12 to soak top of piston to remove and soften carbon. Then with razor





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Re: 034 Rebuild
« Reply #14 on: January 28, 2020, 07:35:05 pm »
C4F  Thanks for the tip on soaking the piston.  Anything I should do to the outside of that piston?  New rings or use old. 

How about the jug, acid then ball hone?  I checked Baileys for hones.  3 sizes, 45, 48, 51.  I would assume 48 but that might be too large since they are suppose to run large.  I'd be guessing and nothing back from Baileys yet.

Hope all is well and have a great one.

Fred
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Re: 034 Rebuild
« Reply #15 on: January 28, 2020, 10:21:28 pm »
I have a set of nylon drifts which are similar I use to install the circlips .The smaller diameter fits in the hollow of the pin,the larger shoves the clip in .To get a stubborn pin loose I use a 1/4" drive socket extension and tap it with a nylon hammer .I also have a few drifts that are make of aluminum .
Another tip I do,don't spare the oil,I mean drown it .If on a cold new start if that engine doesn't blow smoke about 5 minutes I worry I didn't use enough .
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Re: 034 Rebuild
« Reply #16 on: January 29, 2020, 08:20:06 am »
I would put new rings. It's down and their cheap = Caber. Now OEM ones close to cost of a piston kit. 
Check skirts for wear? Shiney looking at bottoms and thickness.

Meteor piston kits about 35 and just rings about 10

IMO if cylinder has no scoring or transfer you dont need to do anything.  I dont use the acid method either. 

Maybe rough up with scotchbrite pad and flush when done.   

I use a 1 2 3 method on bad cylinders.  Flapper for removal of transfer, emery clothe by hand to finish checking areas, ball hone to to deglaze and crosshatch.   Really not needed but like what I have seen for my uses.

Thread on ball hones. They have the sizes on them. Say 47-51 etc. http://chainsawrepair.createaforum.com/stickys-of-how-to-basics/honing-ball-hone-etc/





 
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Re: 034 Rebuild
« Reply #17 on: January 29, 2020, 08:36:04 am »
Thanks C4F

I'm getting dizzy going from one forum to another.   ;D
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Re: 034 Rebuild
« Reply #18 on: January 29, 2020, 09:36:03 am »
Quote from: ENTS on January 29, 2020, 08:36:04 am
Thanks C4F

I'm getting dizzy going from one forum to another.   ;D

Yeah I seen you was there now.  So many stihl techs and dealers there. They will lead you right on the 44 deal.

Pull them rings and soak them lands too and clean out good before new rings IMO
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Re: 034 Rebuild
« Reply #19 on: January 29, 2020, 02:35:22 pm »
Was worried about getting that wrist pin out.  Shouldn't have.  Pushed it out with a drift pin and my hand.  No resistance at all.  Gonna just get a new piston.  From what I see they are not that expensive. 

later,

Fred
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