Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: ENTS on January 24, 2020, 08:17:46 pm

Title: 034 Rebuild
Post by: ENTS on January 24, 2020, 08:17:46 pm
While waiting for parts on the 044 I dug out an old 034.  Jug and piston scored enough that I'll replace same.  Having a hard time finding a 46mm jug and piston, only 48mm.  Also says cover mod is required with replacement jug.  What mod is required??  If I go with the 48mm jug will the stock carb (tillotson, hk43b) be o.k.  What else might be waiting in the wings to bite me on this rebuild?

Hope all is well.


Fred
Title: Re: 034 Rebuild
Post by: Al Smith on January 24, 2020, 10:40:54 pm
An 036 cylinder will work but the cover is slightly different than a standard 034 cover .The 034 super is basically the same as an 036.
I did do one like that once and Kevin ended up with it .It ran good but I didn't have it long enough to work out the fine details it took to straighten it out .I do have an 034 Super but it's just one on the "to do " list which is getting longer than shorter .
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 25, 2020, 08:07:11 am
@Al Smith  she ended up a little beast for years.  036 on the 034av you did and traded me. I kept it going for 2 local firewood cutters. After first one traded in to go newer due to air leak. I put new crank seals and carb kit etc and topend still looked good. 

2nd firewood guy ran it till he retired last year and took it with him to AZ with a 026 I rebuilt for him too. 

Thread where I used it to compare to some other 60cc-62cc saws when it was in one time.  Videos in dry ash. http://chainsawrepair.createaforum.com/poulan/test-in-11'-dry-ash-3450-380-3750-036/



Title: Re: 034 Rebuild
Post by: ENTS on January 25, 2020, 08:59:54 am
Anyone have an IPL and SM for the 034??

It  looks like a 48mm jug and piston will work just fine.  Would have liked to keep it stock but can't find after market 46mm.  For that matter, OEM.

Hope all is well,

Fred
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 25, 2020, 11:25:53 am
Anyone have an IPL and SM for the 034??

It  looks like a 48mm jug and piston will work just fine.  Would have liked to keep it stock but can't find after market 46mm.  For that matter, OEM.

Hope all is well,

Fred

Let me check chainsaw repair group facebook for ya. Have 39,000 members. Someone might have a used 034 oem set.   https://www.facebook.com/groups/415662708518445/

How scored is your cylinder? Most will clean up and just need a piston kit.
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 25, 2020, 11:50:48 am
Oem used set  https://www.ebay.com/itm/OEM-PISTON-CYLINDER-FOR-STIHL-CHAINSAW-034-BOX-1818-T/233260927893?hash=item364f6f4b95:g:jZkAAOSwUBJdCF3b

This used set would clean up so easy. Could throw a piston kit in there.  https://www.ebay.com/itm/Stihl-034-OEM-PISTON-CYLINDER/173940121089?hash=item287fa39e01:g:XSIAAOSwVXRdDDeO
Title: Re: 034 Rebuild
Post by: ENTS on January 25, 2020, 09:04:43 pm
C4F as far as "...how scored ..."  I haven't pulled the jug yet but I'll post thru the exhaust pics tomorrow.  2nd opinion (and more experienced) much appreciated.

Later,

Fred
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 26, 2020, 08:10:05 am
There was guys there in the CRG with used to NOS 034 p+c too.  So your covered if wanting to stay 034 between ebay and them IMHO.
Title: Re: 034 Rebuild
Post by: ENTS on January 27, 2020, 11:03:06 am
Just tried to take pictures of piston and jug while on the saw.  Not too clear.  Anyway, took a closer look at the top of the piston and there is a lot of carbon build up.  Gonna pull that jug and take a closer look.  It'll have to wait tho since I have that 044 on the bench right now.  Not much room on my bench and I'm not good at multitasking.  :) 

Later and have a great day
Title: Re: 034 Rebuild
Post by: Al Smith on January 27, 2020, 09:43:28 pm
I found another 034 but this one is a super so it already has the larger bore and all the plastic will fit .I've been so busy the last few years I haven't had the time to do anything to it or another half a dozen saws on the list .Although I didn't use the last one very long I thought it was pretty peppy and it was a stocker,no mods .I'll give this next one the treatment and see what that does .
Although my favorite Stihl saw is the 038 Mag I really like this series of saws the 034/36 series which I think includes the 044 and 046 .They take to mods very easily .It really doesn't take much to make them really scoot .On that though it's just a hobby for me .My only competition is myself .
Title: Re: 034 Rebuild
Post by: ENTS on January 28, 2020, 11:23:56 am
(http://)
Title: Re: 034 Rebuild
Post by: ENTS 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. 
Title: Re: 034 Rebuild
Post by: ENTS 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
Title: Re: 034 Rebuild
Post by: Cut4fun . 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





Title: Re: 034 Rebuild
Post by: ENTS 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
Title: Re: 034 Rebuild
Post by: Al Smith 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 .
Title: Re: 034 Rebuild
Post by: Cut4fun . 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/





 
Title: Re: 034 Rebuild
Post by: ENTS on January 29, 2020, 08:36:04 am
Thanks C4F

I'm getting dizzy going from one forum to another.   ;D
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 29, 2020, 09:36:03 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
Title: Re: 034 Rebuild
Post by: ENTS 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
Title: Re: 034 Rebuild
Post by: ENTS on January 29, 2020, 05:36:46 pm
SURPRISE  SURPRISE (said in a Gomer Pile accent)

So I was cleaning up some of the parts laying around and I keep pushing that piston around.  For what ever reason it kept getting in my way.  Finally decided to measure it just for grins.  Well, it's 48mm NOT 46mm.  I dig out the cover and it's badged 034 AV  electronic quickstop.  Go to Acres and look up 034.  There's a 034SEQ and a 034EQ.  The fact that this piston and jug measure out to be 48mm makes this a 034 super.  Why was it not badged that way??  Any way, good thing I checked cause I was on the verge of ordering a piston. 

Onward and forward.

Hope all is well and have a great night.

Fred
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 30, 2020, 08:04:48 am
Good thing to know before ordering rings too. ;) 

Like said dont know stihl well. But always thought the super had it on the tag super or the S

stihl 034 034S owners manual https://m.stihlusa.com/WebContent/CMSFileLibrary/InstructionManuals/STIHL-MS-034-Owners-Instruction-Manual.pdf
Title: Re: 034 Rebuild
Post by: ENTS on January 30, 2020, 08:32:19 am
The one picture I found of a 034 Super showed SUPER spelled out on the cover.  This one is just plain jain 034 AV.  Live and learn.  Measure before you leap.  :)
Title: Re: 034 Rebuild
Post by: Cut4fun . on January 30, 2020, 09:21:18 am
The one picture I found of a 034 Super showed SUPER spelled out on the cover.  This one is just plain jain 034 AV.  Live and learn.  Measure before you leap.  :)

You buy used or new?

Like that one I got from Al was a 46mm AV and switched to 48mm and if someone in AZ works on it since my friend retired and moved there. He will find same thing as you. 
Title: Re: 034 Rebuild
Post by: Al Smith on February 07, 2020, 06:36:04 am
What happened  on the 034 before I put the 036 cylinder on it was it was used by a tree service and badly abused .They ran that thing with all the flocking sucked out of the air filter,just the wire screen.Ran it without the bearing in the clutch and actually broke a clutch segment .It didn't have any transfer but did have a lot of wear caused by ingesting dust into the engine .I screwed up the cylinder by using too aggressive type of flap wheel and cut right through the plating.
I put that thing back together with parts robbed from other parts saws except the Meteor piston and Caber rings .The clutch was repaired with I think a segment from an 029 .
I think the reason a tree service would use them is they were  a cheaper option than say an 044 having first used 029/039 that would no way hold up to the abuse they would be subjected to .Had they been been taken care of they would have done okay as a ground saw .It proves once again to let things go eventually they turn into junk .BTW tree service saws are the most wrung out abused saws anybody would ever  find. In case you have an option to buy one .If you do be prepared to work on it and don't pay much money for it .
That's it in a nut shell .Good saws and would make a dandy fire wooder .Light enough and certainly have enough power .