removing clutch drum on an old komatsu zenoah

[tree_beard]

how would someone with no experience of clutch removal go about it with the pictured saw? limited tools as well, nothing too fancy. oh, and not damaging the saw would be a bonus...


thanks for any help

 

[Four Paws]

Are you handy? If so, make something! A wrench to tighten the arbor nut on a small 4" grinder might work. Or, take a sacrificial socket and cut it down so only some small nibs remain - they will fit in the notches of your clutch drum and grip - allowing you to turn it off.

 

[tree_beard]

so what does the actual process of removing the clutch drum involve?

stopping the piston and then just unscrewing the whole assembly? or do the clutch shoes need to come off first?

any pointers would be appreciated.

 

[Four Paws]

-remove spark plug
-insert piston stop (into plug hole) or insert rope, through plug hole into cylinder to act as a piston stop.
-use tool to remove clutch drum - the assembly will unthread when turned clockwise (follow the markings on the clutch).
-reinstall the clutch by reversing this process.

Good luck. Josh

 

[tree_beard]

many thanks josh, dont have a piston stop, but ive got a coil of starter cord lined up for the job, and i can get quite a good purchase with a couple of wrenches ive dug up, i just wanted to check i wasnt going to be greeted with torn metal and knackered threads when i put my back into it.

thanks again for your help

might have more questions to come, trying to get this old(ish), highly abused, komatsu top handle saw in working order. but dont want to spend much cash on the job, so am using it as an introduction to saw mechanics....

fun

 

[Sprig]

As Tom would say "Cool beans!", just wondering if there is a threaded nut on the starter side, on my old Sthil there was so removing the clutch nut was a cinch by putting a wrench on the opposite side against the bench and using it as a purchase to work against, saved stuffing rope etc. in the plug hole (fyi, never did get the flywheel off....yet.....darned thing ) Just a thought, probably useless but ya never know.

to a cool project!

Serge

 

[tree_beard]

job done

got the clutch off, after much swearing and wrench throwing, but not too much trouble (i just like swearing and throwing my tools around).

now to get a new sprocket, the one that came off looks like it has seen through more than its fair share of chains.

new chain and bar as well, the ones that came off looked like they had been used for turfing....

then we can get down to carb adjustment/repair


fun fun fun

 

[Four Paws]

I've seen worse! That said, good for you for learning by doing and wrenching on your own saw. Keep us posted and feel free to ask questions anytime!