PDA

View Full Version : problem with head assembly on extreme

Data
05-09-2005, 12:42 PM
the spindle 120-5 is in the head and seems to be fine.
after the c-clip (going towards the outside) comes one washer 0331 (0.5mm) then a bearing 0319 then the blade grip 0317, another bearing 0319, a washer 0324, the trust bearing 0840-12 (3 parts) another washer 120-7 and the bolt with washer 0086-1
the bolt goes all the way into the spindle and is tight, but I can still move the blade grip in and out about 2mm (both grips).
I understand that centrifugal force will keep it pushed to the outside, but somehow it doesn't look right.
it seems like the spindle is to long from the c-clip groove to the outside or there must be some additional washer installed.
any help is greatly appreciated.
cdrking
05-09-2005, 01:55 PM
http://www.rcheli.com/extreme/head.jpg Here's a picture. It seems you have it all correct BUT having that much play isn't right IMO.

What orings are you running? Also what shimming are you running "inside" the snap ring?

Mine is completely tight but I'm running four 90 durometer orings.

Jeff
Joel Mann
05-09-2005, 02:23 PM
Data

Make sure the inside bearing is fully seated in the blade grip..you have to apply a little more to get it to set down in there..

I hope that helps, JOEL
DavidH
05-09-2005, 02:38 PM
Sounds to me like you may have 0848-1 blade axle instead of the 120-5 blade axle.
0848-1 is the clipped style blade axle for the 0848 rotor head. Which is the metal head block with metal grips.
120-5 is the clipped style axle for the metal head block with plastic grips.

0848-1 is a little longer than 120-5. The grooves in each axle are virtually in the same location. Just the 0848-1 axle is a little longer from the grooves outward on each end than 120-5 axle.

0848-1 Groove is 1.156 from each end.
120-5 Groove is 1.140 from each end.

The 0848 is .008 longer on each end than 120-5

David
Data
05-09-2005, 08:12 PM
thanx guys, I think davidh got it right.
I got the spindle without a package, it could be the wrong one.
cdrking, there is no problem inside the c-clip the problem is from the c-clip to the outside and if the difference is 0.016 between the two spindles, this is the problem.
I will try to get one tomorrow and see if that is it.
thanx again
Data
05-13-2005, 07:10 AM
yup, the spindle was the problem.
I got the new one and it works the way it should.
DavidH
05-13-2005, 07:58 AM
Glad you go it corrected.
That is a problem, most people will see the blade axle with the grooves in them and think they all are the same. I guess there needs to be a way to visually distinguish between the two without measuring them.


David