Removing piston from OS 91 surpass  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Removing piston from OS 91 surpass
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Removing piston from OS 91 surpass - 7/23/2008 2:34:05 PM   
flyingbells


 

Posts: 66
Joined: 5/4/2004
From: Sydney, AUSTRALIA
Status: offline 		Hi folks,

Just need some help in removing piston and liner on an OS surpass 91
I've removed backplate, cam gears and the head. What do I do next???

thanks!

Bill.
       Post #: 1

RE: Removing piston from OS 91 surpass - 7/23/2008 3:26:35 PM   
Bax


 

Posts: 12449
Joined: 4/26/2002
From: Champaign, IL, USA
Status: online 		Remove the cylinder liner, which slides straight up. Then the connecting rod can be removed from the crankshaft. The piston/rod assembly will then slide straight up, out of the crankcase.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

(in reply to flyingbells)
       Post #: 2

RE: Removing piston from OS 91 surpass - 7/23/2008 4:02:37 PM   
flyingbells


 

Posts: 66
Joined: 5/4/2004
From: Sydney, AUSTRALIA
Status: offline 		thks for your quick reply. I've tried removing the sleeve it won't slide out, and there's no where for me to leverage on to pull or push out?

(in reply to Bax)
       Post #: 3

RE: Removing piston from OS 91 surpass - 7/23/2008 4:12:40 PM   
masama1107


 

Posts: 18
Joined: 6/29/2004
From: Long Beach, CA, USA
Status: offline 		Make sure you have removed all rubber O-rings and seals and "bake" your engine block in a small toaster oven at 300-325 Degrees F for about 8 to 10 min...
The sleeve should slide right out of the block when you carefully, with out burning yourself, turn the engine block upside down. Make sure you handle the very hot engine with a thick pot holder, or something else to protect your hands.
I always use this system to remove and re-install ball bearings of both two and four stroke engines and it works great....

Hope this helps.

(in reply to flyingbells)
       Post #: 4

RE: Removing piston from OS 91 surpass - 7/23/2008 6:07:56 PM   
proptop



Posts: 4497
Joined: 10/18/2002
From: Rome, NY, USA
Status: online
quote:

ORIGINAL: flyingbells

thks for your quick reply. I've tried removing the sleeve it won't slide out, and there's no where for me to leverage on to pull or push out?



I wear leather gardening gloves (after heating the case ) and push the sleeve up and out with the handle of an old tooth brush or piece of dowel.

_____________________________

It's bad luck to be superstitious...
Revver Bro #77

(in reply to flyingbells)
       Post #: 5

RE: Removing piston from OS 91 surpass - 7/23/2008 8:26:51 PM   
pilotpete2



Posts: 1473
Joined: 10/31/2002
From: Lyndonville, VT, USA
Status: offline 		As others have said, you have to heat up the case usually before you can remove the cylinder liner. If you have a heat gun for shrinking iron on covering, that will also work very well.
Pete

_____________________________

"If the woman don''t find you handsome, they should at least find you handy"

(in reply to flyingbells)
       Post #: 6

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