Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: aclarke on November 19, 2014, 08:43:00 pm

Title: 090 fan/flywheel removal
Post by: aclarke on November 19, 2014, 08:43:00 pm
Any special tools or technique to remove fanwheel from flywheel?
Title: Re: 090 fan/flywheel removal
Post by: neil on November 19, 2014, 08:57:34 pm
pretty sure they are just screwed onto the flywheel Adam, there is one here at work I could look at later.
Title: Re: 090 fan/flywheel removal
Post by: aclarke on November 19, 2014, 09:56:01 pm
Neil. hope all is well in Aus

Helping a friend get this thing apart Unscrewed the four machine screws and it seems to be locked on from age.
Title: Re: 090 fan/flywheel removal
Post by: ChoppinBill on November 19, 2014, 10:33:23 pm
There was a paper installed between fanwheel and flywheel - with age it seems to glue the two pieces
together. A slight tap against fanwheel at odd angles will get it separated- usually - But do not hit it too
hard or will have several pieces rather than just two parts.....
Title: Re: 090 fan/flywheel removal
Post by: mcbob on November 19, 2014, 10:48:02 pm
Theres the correct puller needed for the flywheel 4 screws hold the fan on
Title: Re: 090 fan/flywheel removal
Post by: stihls066 on November 20, 2014, 12:44:01 am
Just to clarify its a lightning not a standard 090. No threads on inside of flywheel hub like the 090 has. If aclarke is referring to the same friend. 
Title: Re: 090 fan/flywheel removal
Post by: aclarke on November 20, 2014, 01:04:09 am
No threads inside the hub for pulling! I figured my standard Stihl puller sets would work but no dice. Thks for the input
Title: Re: 090 fan/flywheel removal
Post by: neil on November 20, 2014, 02:53:16 pm
Neil. hope all is well in Aus

Helping a friend get this thing apart Unscrewed the four machine screws and it seems to be locked on from age.

All is good here in Oz mate, 1 meet to go this Saturday to finish off our racing season, been a long season this year.
I agree with choppinbill, the fan and flywheel do stick sometimes and need a little tap, a puller is needed for flywheel removal.
I have not had anything to do with the old lightning's.
Title: Re: 090 fan/flywheel removal
Post by: aclarke on November 20, 2014, 03:05:18 pm
Good deal Neil!
Fanwheel came off and this saw has the internally threaded flywheel so the 26x1.5 Stihl puller should work.  Thks guys...
Title: Re: 090 fan/flywheel removal
Post by: mcbob on November 20, 2014, 05:25:44 pm
Same puller works on the Stihl 660 Adam
Title: Re: 090 fan/flywheel removal
Post by: aclarke on November 20, 2014, 06:27:02 pm
Ok I should have the right one.
Title: Re: 090 fan/flywheel removal
Post by: stihls066 on December 03, 2014, 11:23:12 pm
Yeah 660 puller will work  mr. r didnt look close enough the first time
Title: Re: 090 fan/flywheel removal
Post by: EHP on December 04, 2014, 08:36:19 pm
or you could just wire the governor wide open for the carb and pin the 090, it will remove the whole flywheel unit with that part of the crank for you in very little time LOL
Title: Re: 090 fan/flywheel removal
Post by: aclarke on December 04, 2014, 10:18:10 pm
hahahahaha!     Ed, seen a few pics of old 090 racesaws with snapped cranks!!!   those long shafts dont help!!
Title: Re: 090 fan/flywheel removal
Post by: EHP on December 05, 2014, 11:53:25 am
I got a 090 that Marcel built , it broke 5 cranks before I got a hold of it , I cut the flywheel side of the crank alot shorter and tapers it to fit the 064 flywheel and mounted the 064 coil setup in it , No more crank problem breaking but once I got it to build some power that was no way the clutch setup would hold , So I parked the 090 , it runs pretty good but the clutch flys all to hell on it , I put a couple brandnew clutchs in it and still no good , I guess it was never meant to turn those kind of rpms and be on 120 fuel
Title: Re: 090 fan/flywheel removal
Post by: aclarke on December 05, 2014, 01:30:49 pm
That sounds like a good idea with the 064 coil!  Like you say, they were never designed to turn such high rpm or have heavy loads on the PTO side.