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HomeAircraftHelicopterFuel-Helicopters New or Limited ActivityJS › More clutch bell problems... bell sliding down..
04-29-2010 03:30 AM  8 years agoPost 1


Cross Lanes, WV

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Well I posted before of how the clutch bell started rubbing the clutch after my first two tanks, I took it apart, removed the engine shim re-installed and idled a tank through it with no blades..
All seemed ok.
So today I goto the field and hover a tank through it, seemed good except the head didn't want to spool down when idling just kept spinning.
I thought it was due to my higher idle since I'm running it rich for break in.

Well on the second tank it just didn't feel right so when checking the engine temp the engine died (just from being so rich at idle) On restart I noticed some dragging of the clutch bell and metal noise again.

Sure enough the clutch bell has dropped down more and is rubbing the clutch again.
It was at this point I noticed this.

What gets me is the starter coupler is not loose, it never has become loose, I wouldn't think its the bell slipping down on the shaft as I have installed the snap ring in place of the eclip as suggested.
I'll have to tear it apart tomorrow and see, but I'm guessing once I get everythign back in place I'm gonna have to go back and re-install that shim between the fan and engine as I had it to start with.

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04-29-2010 05:20 AM  8 years agoPost 2


Nancy, Kentucky

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Looks like it has dropped, make sure the starter coupling is tightened and the starter shaft pulled all the way up. Drop the engine and verify the c-clip is still there.

also double check to be sure the bearing block is in properly (right side up)so the bearing on top(the one the starter coupling goes against) is not dropping out the bottom of it.

You're not too far from me, If you feel like making a drive to Prestonsburg I will gladly help you fix it. I have an extra clutch and bell for it. Won't cost you anything but your drive time and fuel.

Impacting the earth one heli at a time

04-29-2010 05:50 AM  8 years agoPost 3


las vegas

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make sure that you're pushing the starter shaft all the way up when you install the hex adapter. also, there is a 10 mm flat washer between the main gear and the upper bearing block to prevent the main gear from shifting up and down.

team solo

04-30-2010 12:37 AM  8 years agoPost 4


Cross Lanes, WV

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well I got it apart today. the 1/4" C clip I am using had come loose and was sliding down allowing the bell and bearing to slide down.
I don't know if the clip came out or faulty install on my part so I cleaned the groove really well and reinstalled everything.

I'm gonna look for a 3/16" c clip I think it would fit better / tighter.

Testing it, with everything in place I"m gonna have the put the shim back between teh fan / engine now as teh cluth sticks out from below the bell.
So this was the original cause / start of all my problems, the clip sliding down.

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