Guide pulley near pinion????

[dl5973]

Is it just me or does this fail every 50 or so flights for everyone?

I wish they made an upgrade guide pulley out of carbon fibre or metal for the mini P

[rossk]

Never had it fail on the mini p, I have had a couple let go on the P500.

How tight is your belt?
How are the bearings in the pulley?

Mine melted on the P500's due to bad bearings on a hot day doing back to back flights

[dl5973]

Belt is not that tight.

I changed the bearing and pulley and guide pulley 3 months ago.

[scott s]

Originally Posted by dl5973

Belt is not that tight.

I changed the bearing and pulley and guide pulley 3 months ago.

Do you oil the bearing regularly ?

[dl5973]

no do I have to oil it or all the bearings in the pulleys?

[scott s]

[QUOTE=dl5973;4976254]no do I have to oil it or all the bearings in the pulleys?[/QUOTE

Yes you sure do! just a small drop or 2 and about every 15 flights to 20 flights or even less! Tri flow with the nylon tube applicator works fine or even scorpion motor bearing oil that comes with needle applicators. I prefer the tri flow on everything except the motor bearings, where I use the scorpion oil. Not just the pulleys, but the swash bearing, the main shaft and tail bearings, the main shaft where it goes thru the swash, the tail shaft and bearing in the tail pitch slider. Lube is your friend LOL!
Oh and the bearing in the y support bracet for the motor shaft and a drop on the top of the pinon also

[rossk]

Originally Posted by scott s

Oh and the bearing in the y support bracet for the motor shaft and a drop on the top of the pinon also

I stay away from that one, I thought u do not want a wet OWB?

I do all the others tho with scorp oil - I also have triflow now too, but I wont mix them.

You don't need it straight away as there is grease in the bearing, but after a few flights(30-50) its time to start oiling and once you start, keep it up, as the oil does not last as long as grease, the oil will also wash the grease out.

[scott s]

Originally Posted by rossk

I stay away from that one, I thought u do not want a wet OWB?

I do all the others tho with scorp oil - I also have triflow now too, but I wont mix them.

You don't need it straight away as there is grease in the bearing, but after a few flights(30-50) its time to start oiling and once you start, keep it up, as the oil does not last as long as grease, the oil will also wash the grease out.

There is a post somewhere around here where corrado himself says grease in the one way bearing is a no,no and the pinions are shipped with light oil to lubricate the one ways. So yes a bit of oil on top of the pinion wont hurt as there is a bearing on the very top of the one way if I remember correctly anyways.

[dl5973]

thanks guys

learning new stuff all the time

[SMJT]

Originally Posted by dl5973

Is it just me or does this fail every 50 or so flights for everyone?

I wish they made an upgrade guide pulley out of carbon fibre or metal for the mini P

I have the metal upgrade ones because mine use to go all the time, dont know why no one mention these
http://www.msheli.com/Item.aspx?IDItem=312

[rossk]

I thought the op was referring to the pulley holder, not the actual pulley
http://www.msheli.com/Item.aspx?IDItem=210

I have always used all the cnc upgrades

[SMJT]

Originally Posted by rossk

I thought the op was referring to the pulley holder, not the actual pulley
http://www.msheli.com/Item.aspx?IDItem=210

I have always used all the cnc upgrades

Guide pulley sounds like he is referring to the pulley to me, but he maybe is referring to the holder and if he is then my apology I misunderstood.

[sl4ppy]

Resurfacing this..

I too blow threw these pulleys and their plastic mount like theres no tomorrow. Literally every 15 flights or so of aggressive flying on a 6s stretch at 2300 rpm.

Just to clarify, I'm talking about the guide pulley support part number MSH41042. The one on the left...


Usually the plastic is melted, gouged, worked loose or otherwise not right and often the bearing is totally shot as a result.

None of the other pulleys or bearings have ever failed on me.

It's getting a little tiresome to replace especially since I have to buy an anti-spin bracket with it overtime it fails. :/ I probably have 6-10 anti-spins now, and I've never broken one....

http://www.msh-direct.com/products/a...-msh41042.html

[JustPlaneChris]

If that plastic part is failing, that almost certainly indicates the bearings are bad and getting so hot it's destroying the plastic. So I don't think the bearing is shot as a result of the plastic failing, more likely it's the other way around!

[Aryemis]

Originally Posted by JustPlaneChris

If that plastic part is failing, that almost certainly indicates the bearings are bad and getting so hot it's destroying the plastic. So I don't think the bearing is shot as a result of the plastic failing, more likely it's the other way around!

+1 on that

It happened to me once, the pulley melted it's way out of the support, and the bearing was completely stuck.

Flying hard at 2300rpm ?? Isn't it more like 3300rpm ?
Also, this bearing failing usually happens when you run the belt too tight. Are you sure your belt tension is set correctly ?

[sl4ppy]

Originally Posted by Aryemis

+1 on that

It happened to me once, the pulley melted it's way out of the support, and the bearing was completely stuck.

Flying hard at 2300rpm ?? Isn't it more like 3300rpm ?
Also, this bearing failing usually happens when you run the belt too tight. Are you sure your belt tension is set correctly ?

Sorry, yes.. typo on the rpm.

I don't think the belt is too tight, but I don't have any point of reference as I don't know any other MiniP owners.. I run it about as tight as I run all my tail belted heli's (Logo 5/6).. a couple of millimeters of play.... 3 or 4 I guess?

I guess it could be the bearing failing first... It seems like the slots the bearing fits into get deformed and cause the bearing to shift off it's pivot resulting in the bearing being slightly askew.. This then eventually destroys the bearing as it now has tons of lateral forces that shouldn't be there.

It seems as the plastic is the primary point of failure as I've had to replace the holder at least twice where the bearing was totally fine.. I just happened to hear the belt sound funny before the bearing let go and checked the holder...

[Fooferdoggie]

that bearing is spinning really fast the same rpm as the motor. so it needs oiled often i use the scorpion oil on it.

[JustPlaneChris]

Tension on the front side of the Mini P can be run quite loose (much looser than on the P500), so I suspect you're running it too tight. My first pulley lasted over two years before the bearing failed, so your experience is definitely atypical.

[crickr1]

Originally Posted by sl4ppy

Sorry, yes.. typo on the rpm.

I don't think the belt is too tight, but I don't have any point of reference as I don't know any other MiniP owners.. I run it about as tight as I run all my tail belted heli's (Logo 5/6).. a couple of millimeters of play.... 3 or 4 I guess?

I guess it could be the bearing failing first... It seems like the slots the bearing fits into get deformed and cause the bearing to shift off it's pivot resulting in the bearing being slightly askew.. This then eventually destroys the bearing as it now has tons of lateral forces that shouldn't be there.

It seems as the plastic is the primary point of failure as I've had to replace the holder at least twice where the bearing was totally fine.. I just happened to hear the belt sound funny before the bearing let go and checked the holder...

I run the cnc pulley as others mentioned, I use red high perf grease packed between the 2 bearings,
Also, make sure the pulley is "seated" properly in mount, it's a tight click, and it is running true,//. to motor shaft.
Then belt tension

As stated by others , too much tension, lack of grease, can cause your failure. Also if not seated properly nor // to shaft. I have more problems with pre mature tail pulley wear on my mini.

[Mikej]

This may help when it becomes available Lynx CNC pulley and bracket
http://www.lynxheli.com/product_info...ducts_id=24042