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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › Zenoah G20: could you help me?!
02-28-2012 01:18 PM  9 years ago
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lanalora

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Vasto, Italia

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Zenoah G20: could you help me?!
Hi, I am writing from Italy, so I apologize to you for my english.
I have a problem with the engine: I should unscrew the clutch, but I was not able to. Could someone tell me how to do?!
In the past I did it, but the clutch was broken so I didn't worry about how to unscrew it. But now it's different!
Thanks to you
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02-28-2012 01:49 PM  9 years ago
frgy28

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Santa Clarita, Ca.

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Hello...
There is a few tools from Century ...

a Clutch Puller... http://www.heli-world.com/detail.aspx?ID=6850

a Piston Stop... http://www.heli-world.com/detail.aspx?ID=5853

and a Puller... http://www.heli-world.com/detail.aspx?ID=10455

The pulled does the same job as the clutch pulled though, it has more tooling for different hubs....

You can always mock something like the puller with great results....
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02-28-2012 02:54 PM  9 years ago
ttaylor63

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Floresville,Tx

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U can also take the spark plug out and move piston all way down then put some rope in spark plug hole then move piston to top. The rope will work as a piston stop as well. I've done this. I used a pipe wrench to remove my clutch also. Just be careful.
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02-28-2012 03:04 PM  9 years ago
frgy28

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Santa Clarita, Ca.

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+1 ......The rope trick works well....

Though you can get something like this going if the rope trick won't do it for you....
http://www.heli-world.com/detail.aspx?ID=10455
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02-28-2012 03:41 PM  9 years ago
Pistol Pete

rrProfessor

Seffner, FL

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The tool you need to purchase or make is called a "spanner wrench", also known as "pin wrench".

Looks like this one

http://www.harborfreight.com/adjust...ench-36554.html

The link above is for an "adjustable" one as they also come non adjustable.

I made my own from ALU flat stock as I could not find the above in stock locally.

You can see photo in my gallery under "RAD20 modification". Its in the first photo next to a MOUSER catalog and the high tech piston stopper ( 12mm nylon rope )
~~Enjoying the hobby one flight at a time~~
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02-28-2012 04:15 PM  9 years ago
lanalora

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Vasto, Italia

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Really many thanks to all of you, guys.
Your suggestions will be very useful for me.
I had thought to use a toothbrush for babies as piston stop, but now I will try rope trick.
This forum is a really good site
You have to know that I made the same question on an italian site and up to now there was only one reply, asking to me to post a photo.
Thanks again
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02-28-2012 04:19 PM  9 years ago
Pistol Pete

rrProfessor

Seffner, FL

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Send him this link instead of photo

Best of luck!
~~Enjoying the hobby one flight at a time~~
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02-28-2012 04:35 PM  9 years ago
lanalora

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Vasto, Italia

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02-28-2012 11:05 PM  9 years ago
Rodney

rrVeteran

St.Cloud,Florida

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Be careful with the rope as you can twist the crank. I found it easier to use a oil filter strap wrench around fan. And I made a spanner type wrench from flat aluminium and drilled and tapped to bolt holes. Line them up with the holes in clutch and use it as a wrench. Works great for me. And no twisting on crankshaft,rod or wristpin bearingDx7 With Ion Power Supply. Why use anything else.
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