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HelicopterEngines Plugs Mufflers Fuel › O.S. 55 rear bearing failure Should I change out when I get it back from Service?
08-14-2010 07:14 PM  7 years agoPost 1
Slim pickins

rrApprentice

Clarkston Michigan

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Yup, actually my first rear bearing failure on ANY O.S. motor... Barely 2 gallons on it, never run lean. Hell, the piston and inside top of the head arent even discolored. Looks like the race failed and spilled a couple bearings which the con rod smooshed on the bottom of the block and sent them up through the cylendar and ended up in the glow plug (without a crash thankfully). Top of the piston is pretty chewed up. NICE!!!

Anyhow, sending it back for warranty service on Monday. My question is... Should I change bearings when it's returned to me? Im kinda hesitant to because that will probably void any other warranty work.

If I do decide to change, What rear bearing do you suggest I use?

Epic Helis

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08-15-2010 03:14 AM  7 years agoPost 2
Gearhead

rrMaster

Vt

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I would send it in to HS, but I'm telling you if there is rust on the bearings they will most likely blame it on you,,

it's funny how many plane engines can set for years and their bearins wont rust but these bearings in these heli engines only last 2 or so gallons..

good luck with that !!

Jim
Buzz Buzz Buzz

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08-15-2010 03:58 PM  7 years agoPost 3
Aaron29

rrProfessor

USA

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..

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08-15-2010 06:25 PM  7 years agoPost 4
Slim pickins

rrApprentice

Clarkston Michigan

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No, IT HAS to be sent in for warranty repair, the rear bearing failed and the engine is FUBAR. I just dont want another rear bearing failure when I get it back (assuming they'll but the same rear bearing in).

What bearing type should I get? A stainless steel caged one or the plastic caged one?

Anybody have a link? I've seen some at boca....

Epic Helis

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08-16-2010 02:19 AM  7 years agoPost 5
Gearhead

rrMaster

Vt

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Aaron, I here that, in the passed I have opened a Plane Engine and Castor dribbled out, , but some of the Bearings have Ball Skidding, and Skidding is from a lack of a Preload, LOL and of-course a broken Cage is something else,,

""What bearing type should I get?""

well many people have had luck with different Bearings, some have had luck with SS Bearings, sorry I don't remember what their Cage (Retainer) was made of,, do a search or ask what Bearing to buy..

Jim
Buzz Buzz Buzz

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08-16-2010 05:58 AM  7 years agoPost 6
Aaron29

rrProfessor

USA

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08-16-2010 03:46 PM  7 years agoPost 7
fla heli boy

rrKey Veteran

cape coral, florida

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never could figure out why OS doesn't just spend a few extra bucks and put in good bearings and raise the price accordingly. I'm sure most OS pilots would be glad to pay an extra 5 or 10 bucks when they buy new.
Back in the day, I had to replace rears, but that was after many,many gallons of use. But, then again, we didn't twist them as hard as is done today.

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08-16-2010 05:10 PM  7 years agoPost 8
DS 8717

rrProfessor

Here wishing i was somewhere else

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[quote]it's funny how many plane engines can set for years and their bearins wont rust but these bearings in these heli engines only last 2 or so gallons..

Thats because there is a lot more stress on the engines in helis than airplanes. It has to deal with clutches and gears,not to mention the load from the main blades....

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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08-17-2010 07:50 PM  7 years agoPost 9
supertigre

rrApprentice

Castle Rock, Colorado

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If they put in the same bearing as stock, you can expect the same results. OS switched to a plastic retainer in the 50 a long time ago because of cage failures. Funny thing is, the NEW replacement bearings have steel retainers! The old style with the plastic retainer is discontinued. Thanks, Tower!

Stainless steel bearing with a plastic retainer gives you the most protection available.

Paul Mcintosh
Owner-CRCustom.com - custom vinyl lettering, banners, signs

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08-17-2010 07:51 PM  7 years agoPost 10
supertigre

rrApprentice

Castle Rock, Colorado

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Most plane engines don't rust because most sport fuel has at least a little castor oil, or better synthetic oil packages. Heli fuels seem to use the thinnest, cheap oils they can find.

Paul Mcintosh
Owner-CRCustom.com - custom vinyl lettering, banners, signs

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