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HelicopterEngines Plugs Mufflers Fuel › How to remove the O.S. Piston Pin Retainer for​O.S. 50 Hyper?
05-12-2008 07:45 AM  9 years agoPost 1
jackheli

rrProfessor

Vancouver - Canada

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I need to replace the piston on my Hyper. How do I isolate the con rod?

thanks.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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05-12-2008 11:41 AM  9 years agoPost 2
Paul Woodcock

rrElite Veteran

Dubai - United Arab​Emirates

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Hi

Before you remove the conrod..... mark or take note of the piston and con rod. It has the half moon cut up at the rear bottom of the piston. The conrod will have the lower 'big end bearing' skuffed at the rear by the back plate and the inner part will be beveled where it goes onto the crankshaft.....important stuff.....

Grap the small "G" clip with long nose pliers. Rotate and pull in towards the middle.

Take both out and replace with new ones. They are cheep and i would never re-use them for a new piston.

While the gudgeon pin is out, give it a good clean and the inside of the con rod.

When you install the new clips, make sure they are in the groove on the inside of the piston.

Regards

Paul

PS: new piston, are you replacing the ring?

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05-12-2008 09:23 PM  9 years agoPost 3
jackheli

rrProfessor

Vancouver - Canada

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Thanks. Will try tonight.

Appreciated.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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HelicopterEngines Plugs Mufflers Fuel › How to remove the O.S. Piston Pin Retainer for​O.S. 50 Hyper?
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