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HelicopterHIROBOOther › Gold dust on top of Evo main gear??
05-31-2004 11:02 AM  13 years agoPost 1
Wes Crockett

rrApprentice

Bourne End, Buckinghamshire, UK.

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Ive had my Evo 4 or 5 months now but in the last couple of weeks I've noticed a buildup of gold coloured dust sitting on top of the main gear.

Must be caused by friction between the auto hub and the gear itself, just seems strange how its just started to appear.

Anyone else experienced the same thing with their evo's?


Cheers


Wes

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05-31-2004 11:06 AM  13 years agoPost 2
Bigg

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Western Massachusetts

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Gold dust!

Lucky charms from the Leprechaun?

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05-31-2004 11:20 AM  13 years agoPost 3
Wes Crockett

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Bourne End, Buckinghamshire, UK.

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Only problem is its causing some nasty glitching, maybe not so lucky

Wes

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05-31-2004 12:24 PM  13 years agoPost 4
Kino

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Navan, Ireland

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I've seen this but only after a 300$ lockout, don't ignore it.
I think its time for a rebuild and replace the affected parts.

Why do we fear change, one of the two certainty's in life

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05-31-2004 12:54 PM  13 years agoPost 5
Taipan

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Sydney, Australia

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That'll be from the sleeve rubbing the big brass washer on top of the one-way. Maybe you have the main gear in too tight, if there is a shim in between the 2 gears, try removing it to free it up.

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05-31-2004 02:01 PM  13 years agoPost 6
Wes Crockett

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Bourne End, Buckinghamshire, UK.

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Thanks for the advice, think I will take out the gear and investigate before it costs me some doh.

The glitching started for the first time when I flew yesterday, did well to get it down in one piece as it is was a long way away at the time.

Cheers

Wes

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05-31-2004 03:23 PM  13 years agoPost 7
rob_jones

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Perry, GA

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Mine did the exact same thing after about 150 flights. The flange on the top of the autorotation hub sleeve wore a groove into the top of the upper brass main gear bushing. It's actually brass dust, not gold dust

I think the cause was having a tiny bit of vertical play in the main shaft.

I flipped the bushing over and made sure there is no more play in the main shaft (and check it often). After every flying session, I check for dust but so far haven't seen any. I've flown about 30 times since I flipped the bushing.

I think that bushing is going to end up being a disposable wear item. But so far, so good!

Blade 550X, T-Rex 450 Pro FBL

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06-01-2004 09:44 AM  13 years agoPost 8
mrNoodles

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Borlänge, Sweden

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Kind of same experience as BimmerM3
Didnt see any dust though.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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06-01-2004 04:30 PM  13 years agoPost 9
Kino

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Navan, Ireland

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BimmerM3 My problem got worse when I took the play out of the main shaft with some shim material. It went from intermittent glitch to complete lockout.

Why do we fear change, one of the two certainty's in life

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06-01-2004 04:35 PM  13 years agoPost 10
mrNoodles

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Borlänge, Sweden

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Wouldnt it be enought just pulling the mainshaft up and lower the maststopper?

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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06-01-2004 04:52 PM  13 years agoPost 11
rob_jones

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Perry, GA

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Wouldnt it be enought just pulling the mainshaft up and lower the maststopper?
That's what I did. No problems since.

Kino, why did you use a shim instead of what mrNoodles did? Where did you install the shim?

FWIW: I never experienced any glitching. Are you sure it isn't being caused by something else?

Blade 550X, T-Rex 450 Pro FBL

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06-01-2004 10:53 PM  13 years agoPost 12
mrNoodles

rrProfessor

Borlänge, Sweden

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Same as BimmerM3 again!

And yes Im also wondering why you used shims?

No glitching here either.

/Fredrik
'Hm now I just have to find out where to connect the GV1 sensor to the Jazz80 ESC.

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06-02-2004 09:26 PM  13 years agoPost 13
Kino

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Navan, Ireland

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I measured the play between the two gears with a feeler guage and shimmed with the appropriate size shim material to remove play and then pulled the main shaft up and lowered the mast stopper.

The result of this error in judgment (fu@k up) was the upper flange separated from the auto-rotation hub sleeve and wore a groove into the top of the upper brass main gear bushing and the upper bearing wore a grove in the flange.
If that makes any sense here a pic to help

Why do we fear change, one of the two certainty's in life

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06-02-2004 09:36 PM  13 years agoPost 14
rob_jones

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Perry, GA

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Damn. I can't believe that the flange actually broke off! Now I can see where the glitches were coming from!

When you put it all back together, don't use any shims. Just pull the mainshaft up and push down on the mast stopper when you tighten it. It's not designed to use any shims and using them could be what led to the failure.

Does Ireland have a counterpart to Jeff Green that you could talk to about it?

Blade 550X, T-Rex 450 Pro FBL

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06-03-2004 04:53 PM  13 years agoPost 15
Kino

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Navan, Ireland

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Not really, to get any support here cost$ and even then then its usually you need to buy this or that. Its a shame but the retailers here are assholes, the ones I know of anyway.
This is one time I'd like to be wrong by the way so chime in if anyone can recommend some good impartial advise in Ireland.

Why do we fear change, one of the two certainty's in life

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06-03-2004 05:29 PM  13 years agoPost 16
rob_jones

rrKey Veteran

Perry, GA

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Well, it wouldn't hurt to send JG an email. He may or may not be able to do anything about it, but maybe he could at least direct you toward somebody who can.

It's worth a try, anyway!

Blade 550X, T-Rex 450 Pro FBL

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06-27-2004 06:24 PM  13 years agoPost 17
ddang

rrApprentice

Corona, CA

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Hi guys,

I'm a little confused. I also have brass dust on my main gear but no play with the main mast though.

What shim are you guys talking about (part number please)? My main gear come assembled.

Thanks.

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06-28-2004 08:54 PM  13 years agoPost 18
rob_jones

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Perry, GA

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I'm a little confused. I also have brass dust on my main gear but no play with the main mast though.
There is probably a tiny bit of vertical play in the main shaft. May not be much. Just flip the bushing over and you are good to go!
What shim are you guys talking about (part number please)? My main gear come assembled.
There should not be a shim. I think was something somebody added to remove the vertical play. A better solution is to just tighten the main shaft collar.

Blade 550X, T-Rex 450 Pro FBL

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HelicopterHIROBOOther › Gold dust on top of Evo main gear??
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