Help with 034

[red dawg461]

Howdy y’all. I‘ve come to seek help from the pros here. I just can’t figure it out.
I’m bringing back to life my dad’s old 034AV, which I think dates back to the early 80s, and just can’t figure out what IPL parts to use. I’ve located a few 034 manuals on various sites and it looks like parts changed with the 034AV and I’ll be honest it’s really hard to figure out the Stihl parts list wit’s all the symbols and letters. All I have is the Serial Number that may give you an idea what year this may be: 1-39-152-83X, and from various parts dealers online this is an “early”model.

I put on a new rim sproket kit, 1125 007 1041 and it came with a drum with the numbers 1125 169 2902A, which is the oversized spline compared to the small spline that was original and wore out completely. I also added the cover washer on the inboard side of the clutch itself, as it was not originally pn the saw but the IPL showed it as a part I needed. Changed the clutch sprigs too.

The issue I had on my first test with her is the chain never did quite stop turning and the E-clip and outer washer, 27mm, appeared to be putting pressure on the drum itself and possibly the needle cage. Needless to say that after a few minutes the bearings literally flew out of the saw and my fun was done.

Is it possible that the washer that is on the inboard side of the clutch, perhaps to keep the oiler pump and crank bearing protected was not meant to be on this saw, which causes the whole clutch assemble to be under pressure by the E-clip and washer?

I hope that someone on this great forum has come across this before and can give me a hand in getting the right parts. Unfortunately the Stihl deals in my neck of the woods are parts changers and look at me like a deer in a headlights.

Thanks for your help y’all
RedDawg461

 

[drf256]

Post a picture of your clutch.

You are correct about the washer, that’s your problem. The older style clutch has some elongated shoe retainers on the rear part. It’s thicker and won’t allow proper fitment if the washer is used. Get rid of the washer and everything will work again.

The upgraded drum is the MS360 Drum. The bearing is pretty easily identifiable as it’s the same as the 044/046 one with less and bigger rollers. The drum has a rim gear that’s the same as the 044 drum and allows use of the larger sprockets.

The drum is not the same and the 044/6 drum. The 360 drum is deeper. If you use an 1128 drum in error, you won’t engage the oil pump worm gear unless you bend it up.

I haven’t ever had problems with the original 034/036 drum and bearing. Just gotta keep it’s oiled.

 

[red dawg461]

Thanks drf256 for your reply and sounds like I’m headed in the right direction. I don’t know why the Stihl folks make it so hard to find the right parts. I thought I was doing the right thing by installing that in board washer but I never was able to get the drum to stop turning due to the friction of the outer washer and the E-clip. I’ll take that dang thing off this weekend and try again. I’ll post a picture too.

Just curious, is the new bearing the 10 x 16 x 12mm or is it the smaller one at 10x13x12? The one that blew out on me was the 16mm one and this one was supposed to be the right one for the 2902A clutch drum.

 

[drf256]

I don’t know which one it is. I’d use the longest one that doesnt stick out of the drum when all is fully seated.

I know the 360 drum is different, but I am pretty sure the bearing is the same as the 044 one. I could be wrong, one could conceivably be shorter. I generally don’t swap out the original, I just grease it.

 

[jacob j.]

The 044/MS-440 needle cage Dr. Al refers to is 9512 933 2380 and measures 10x16x12mm. As Al mentioned, the newer clutch drum (036/MS-360 style) uses that needle bearing.
The old-style needle bearing was 9512 933 2260 and measured 10x13x10mm. As Al also mentioned, you need to re-set your clutch and take out the washer.

 

[red dawg461]

The 044/MS-440 needle cage Dr. Al refers to is 9512 933 2380 and measures 10x16x12mm. As Al mentioned, the newer clutch drum (036/MS-360 style) uses that needle bearing.
The old-style needle bearing was 9512 933 2260 and measured 10x13x10mm. As Al also mentioned, you need to re-set your clutch and take out the washer.

Thanks for jumping in on this jacob. I plan on taking that washer off next. I have the shorter bearing that I can use, but I really don’t nave to use the saw, it was my dad’s and for the age of that old girl I would say that she runs like a new one. With it getting older and parts not as easy to get, and there are not many dealers anymore that are saw mechanics. Here is a picture of my clutch drum on an 034AV and what I was told was the 9512 033 2382, 10X16x13mm was the right one for the clutch. I don’t know if that 1mm will make that mush of a difference. The first bearing pic is the new 2382 last pic shows] the shorter bearing that was with the 1041 kit.
Thanks again jacob.

 

[drf256]

The entire clutch drum is sticking out too far. Remove the washer behind the clutch before you do anything else. In addition, the washer’s are marked “top” which needs to face outwards. Installing backwards would push the clutch even further outboard.

 

[5155]

I need to pay attention since this same thing is coming here soon.

My existing has no inner washer, but that means nothing.

When I first saw the latest clutch pic I thought the bell or drum was not fit to the oil pump properly.
Per those two little cut outs.