Stihl Clutch Help

[Vintage Engine Repairs]

Chaps,

My local dealer had a spur drive sprocket for years, I came in one day and saw him chuck it in the bin.

I asked why, he said because he didn’t know what saw it fit and it had been there a decade.

it was covered in rust, but new. I asked if I could have it and he agreed.

I took it back, soaked it in evaporated and used scotchbrite to clean it up and exposed a part of a part number.

1125/06

and the internal diameter is 76mm.

Searched around to find its likely an 034/036 spur sprocket clutch drum.

I just had a quick look in the ipl and seems to be

1125 640 2006

However they also mention a clutch drum 1125 640 2000

I can’t seem to figure out the difference between them. Here is the clutch drum and also a snapshot of the two part numbers.

Also, what do the asterix (*) next to the part numbers refer to?

 

[pioneerguy600]

Does it have a oil pump drive notch below that indicator? If so its not all that old. The number on it would make sence as the /06 would be the abbrevation for 2006

 

[Vintage Engine Repairs]

Does it have a oil pump drive notch below that indicator? If so its not all that old. The number on it would make sence as the /06 would be the abbrevation for 2006

Yes mate it has a notch, I have an 034 super, red lever coming, from the IPL they all seem to show notches. Do you know if they ever made an oil pump for the 034 / 034s / 036 that didn’t require the notch to drive the worm gear? I know the 026 did..

 

[pioneerguy600]

All I know is from the ones I owned and those I worked on all had the notch in the drum oil pump drive for the adjustable oil pump. The IPL that I have does not list one but it may not cover the oldest 034/036 saws.

 

[DND 9000]

The * indicates this part as a part for a older version of the chainsaw. The serial number brake is mentioned to which it was used.

 

[berrnard]

i believe the * is the older part# and the plain is the one that took its place or vice versa. it should say in your IPL. maybe on the first page or at the bottom
and they all have notches and that line for the 034. the line is reference for us to line up the notch to in turn drive the worm gear.
drums without a notch are for crankshaft driven oilers(oil anytime the engine is running) like on the 026/260 non pro version

 

[HarleyT]

Would this apply?

 

[Vintage Engine Repairs]

Would this apply?
View attachment 880267

Thanks Harley ! Mines 16mm

will replace with the bigger bearing too if it isn’t already



Surprised to see the clutch drum isn’t square, the notch side and 180 degrees too isnt...

 

[Vintage Engine Repairs]

Would this apply?
View attachment 880267

Harley do you have any other tech service updates for the 034 super you could send my way?

 

[HarleyT]

The stuff I just post here is off of the old mediacat. I am going to check out some stuff this week on the dealer's computer, I'll see what I can turn up.

 

[PogoInTheWoods]

This may help.

 

[PogoInTheWoods]

Surprised to see the clutch drum isn’t square, the notch side and 180 degrees too isnt...

That's pretty uncommon to see. May be why it was sitting aside all these years and will probably require a notch 90 degrees either direction from the current one for the oiler worm gear spring to remain engaged.