Hard time replacing tail pitch slider on 125CP

Mark83 · 02-04-2012, 06:52 PM

I'm having a really hard time replacing the tail pitch slider on my 125CP. It seems as if the ball on the tail pitch slider is too large for the socket on the tail pitch control arm. Or the socket is too small. Anyway I've already buggered one up and thought I should ask for some advice before taking out another one.
Any tips?

phoenixheli · 02-05-2012, 06:48 PM

You are aware that all ball links have a slighter larger hole on one side and a slightly smaller one on the other?

And to clarify, did you mean the ball on the pitch slider that connects to the bell crank or the link from the push rod to the bell crank?

If you meant from the bell crank to the pitch slider ball, then yes, they are a bear to snap on sometimes.

Mark83 · 02-06-2012, 12:23 PM

I'm referring to the part descriptions from the exploded view in the 125CP manual. Bear with me I'm new to to this.

The tail pitch slider (HMXE8454) has a ball on one side and a short rod on the other, 180 degrees apart. The tail pitch control arm (HMXE8453) has a socket on one side and a grooved section on the other. So it can only go together one way. I'm having a really hard time getting that ball into the socket. As I wrote I already buggered one up and now have another on order. I e-mailed Helimax support and the answer I got was basically "yeah that has to be a tight fit to so that there isn't any slop in the tail."

phoenixheli · 02-06-2012, 06:34 PM

Ok, well atleast I understood your correctly. However, I can only concur with helimax that they simply are very tight.

Mark83 · 02-06-2012, 10:19 PM

Okay when the new part arrives I'll give it another go. Perhaps the mold was a little off on the first one. I'm pretty good with these things so we shall see...

Thanks again for you help.

Mark

pcsc1097 · 03-24-2012, 01:24 AM

I had the same problem on my 125 cp. After trying to just push it in for 20 minutes, I noticed that the ball on the new slider was way to big to fit in the socket.The fix was to carefully grind the ball on the tail pitch slider down the diameter of the ball to fit in the socket on the pitch control arm. I am sure there is a better way to do it but I wanted it fixed at the time and this did the trick.

10 flights later there is no vibration and it flies like new.

02-04-2012, 06:52 PM	#1
Mark83 Registered Users Join Date: Feb 2012 Location: Columbus, NJ	Hard time replacing tail pitch slider on 125CP I'm having a really hard time replacing the tail pitch slider on my 125CP. It seems as if the ball on the tail pitch slider is too large for the socket on the tail pitch control arm. Or the socket is too small. Anyway I've already buggered one up and thought I should ask for some advice before taking out another one. Any tips?

02-05-2012, 06:48 PM	#2
phoenixheli Registered Users Join Date: Jul 2009 Location: Apollo, PA	You are aware that all ball links have a slighter larger hole on one side and a slightly smaller one on the other? And to clarify, did you mean the ball on the pitch slider that connects to the bell crank or the link from the push rod to the bell crank? If you meant from the bell crank to the pitch slider ball, then yes, they are a bear to snap on sometimes. __________________ CPv3, Axe 400, Exi 450, Franken Heli 450, mCPx, Swift 16, Blade 450x Thumbs Only!

02-06-2012, 06:34 PM	#4
phoenixheli Registered Users Join Date: Jul 2009 Location: Apollo, PA	Ok, well atleast I understood your correctly. However, I can only concur with helimax that they simply are very tight. __________________ CPv3, Axe 400, Exi 450, Franken Heli 450, mCPx, Swift 16, Blade 450x Thumbs Only!

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02-06-2012, 12:23 PM	#3
Mark83 Registered Users Thread Starter Join Date: Feb 2012 Location: Columbus, NJ	I'm referring to the part descriptions from the exploded view in the 125CP manual. Bear with me I'm new to to this. The tail pitch slider (HMXE8454) has a ball on one side and a short rod on the other, 180 degrees apart. The tail pitch control arm (HMXE8453) has a socket on one side and a grooved section on the other. So it can only go together one way. I'm having a really hard time getting that ball into the socket. As I wrote I already buggered one up and now have another on order. I e-mailed Helimax support and the answer I got was basically "yeah that has to be a tight fit to so that there isn't any slop in the tail."

02-06-2012, 10:19 PM	#5
Mark83 Registered Users Thread Starter Join Date: Feb 2012 Location: Columbus, NJ	Okay when the new part arrives I'll give it another go. Perhaps the mold was a little off on the first one. I'm pretty good with these things so we shall see... Thanks again for you help. Mark

03-24-2012, 01:24 AM	#6
pcsc1097 Registered Users Join Date: Feb 2012 Location: Temecula, CA	I had the same problem on my 125 cp. After trying to just push it in for 20 minutes, I noticed that the ball on the new slider was way to big to fit in the socket.The fix was to carefully grind the ball on the tail pitch slider down the diameter of the ball to fit in the socket on the pitch control arm. I am sure there is a better way to do it but I wanted it fixed at the time and this did the trick. 10 flights later there is no vibration and it flies like new.