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HelicopterBeginners Corner › Don't use "piston lock tools"
10-24-2004 05:53 PM  13 years agoPost 21
RRuiz

rrApprentice

Puebla, Mexico

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Thanks to all for the comments... RCerr22 what was your bad experience putting something in the carb?

Roberto

Don't let confidence exceed ability

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10-24-2004 06:32 PM  13 years agoPost 22
okw14

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Morgantown, WV

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I made my own crank lock similar to the OS version out of a piece of dowel rod. Just cut off a short piece of dowel and cut a notch in the end to fit over the connecting rod. Make sure the piston is at the bottom of the stroke.

Keith

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10-24-2004 11:08 PM  13 years agoPost 23
Rcer22

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Somewhere In The​Adirondack Mountains

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I had no bad experience putting anything down the troat of the carburator it's just something that sounds like a bad idea namely because you could wind up with a peice of whatever your putting in the carb in the carb. And that not a good thing.

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10-24-2004 11:16 PM  13 years agoPost 24
wisebob

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US

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I've always used a piston lock tool and never had any problems. Just be careful not to over torque the nut. As long as you are careful, it is one of the best tools for that purpose.

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10-25-2004 12:29 AM  13 years agoPost 25
RRuiz

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Puebla, Mexico

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The issue is that the fan is totally locked and I found that the rod is damaged and still I can't take the nut.

Roberto

Don't let confidence exceed ability

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10-25-2004 12:37 AM  13 years agoPost 26
Glenn in Den

rrKey Veteran

Longmont, Colorado​area

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I'm with Wisebob. . . never had a problem with a piston lock tool. I've done the "toothbrush in the carb and the cushy handle of pliers method" and prefer the dreaded glow plug piston tool.

Maybe some older or worn pistons had a problem?

If that's all it takes to ruin a piston . . .YIKES!!!



Glenn.

I'm not really an R/C pilot, I stayed in a Holiday Inn Express last n

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10-25-2004 12:43 AM  13 years agoPost 27
Al Magaloff

rrMaster

12,199 Posts- Enough​Time Wasted. See Ya!

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"I've always used a piston lock tool and never had any problems." I put one round in my 44 magnum Smith, and put the barrel in my mouth, while pulling the trigger. The last four or five times I've done this, I've never had a problem!

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10-25-2004 12:54 AM  13 years agoPost 28
wisebob

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US

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I put one round in my 44 magnum Smith, and put the barrel in my mouth, while pulling the trigger. The last four or five times I've done this, I've never had a problem!
Since I started flying, I've easily spent over $50,000 USD on RC helicopters going through many different helicopters and motors. After all that, I never had a problem with a piston lock tool and will still continue to use it. Like I said, just be careful and don't over torque the nut.

bob

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10-25-2004 08:53 AM  13 years agoPost 29
Rcer22

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Somewhere In The​Adirondack Mountains

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I have the piston lock tool also and I have used it from time to time on my larger engines where I know the piston is beefy at the top. In fact thats my first choice tool but you have an engine that the nut or fan don't want to turn your putting unnessesary stress on the connecting rod and bushings and running the risk of cracking the top of the piston or even breaking it. I had an engine hydro lock on me once and bent the connecting rod trying to turn the engine. So I know its possable to do damage. On a nut that hasen't been over tightened and has thread lock on it it shouldn't be too hard to loosen. If it is too tight you should invest the time to take off the four bolts from the back plate and use a locking tool or a peice of wood to hold the crank. And remember don't use the red thread lock use the blue . The red is really hard to get loose.

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10-25-2004 09:57 AM  13 years agoPost 30
cjw

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UK - Cheshire

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I have the piston lock tool also and I have used it from time to time on my larger engines where I know the piston is beefy at the top.
Actually the big block engines have very thin pistons, easily damaged

Use the proper tool. The engine manuals say don't use a piston punch, and not just so that OS can sell the crank lock tool.

Clive

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10-25-2004 10:08 AM  13 years agoPost 31
swshshplt

rrApprentice

S.W.Michigan

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i think you guys are still

gonna use what you have , a piece of wood in the case like the o.s. tool works good enough for all us really 'po people that would rather buy another gallon of fuel than a chunk of teflon

it says , grease here, huh..... go figure...air is supa-neeto!!!!

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10-26-2004 11:35 PM  13 years agoPost 32
zoom boy

rrKey Veteran

N.E. Lincolnshire UK

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I prefer the hydraulic lock method, contrary to popular belief if you lock it with a charge of fuel then you dont damage the motor, you only do that if you put a starter motor to it.

You are also spreading the load on the piston across all the surface, so thats another good point in this methods favor, and if you rotate the crankshaft slowly you will not overstress the con rod.

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10-26-2004 11:45 PM  13 years agoPost 33
Al Magaloff

rrMaster

12,199 Posts- Enough​Time Wasted. See Ya!

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The problem with anything in the cylinder, is the concentrated load put on the connecting rod. You can't tell someone who has never done this before" just don't tighten it too much". WTF is that? " I use a piston stop tool all the time, never have a problem, just don't tighten it too much", as defense for your position. With an OS crank holding tool, you will twist the end of the cranshaft off, tightening the nut, and not hurt the rest of the motor.

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10-27-2004 02:38 AM  13 years agoPost 34
sultan68

rrApprentice

Broomfield, CO​Elevation 5420'

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Piston lock tool

I have never busted a piston yet with a piston lock tool. It seems to me to be just another old-wives tale. Most pistons, today, are constructed of durable aluminum. I have used them on OS32, OS50, TT50, TT70, YS80, YS91and it doesn't even leave a mark on the piston!

Chris

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10-27-2004 06:40 AM  13 years agoPost 35
YSRRider

rrElite Veteran

usa

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do those tools have warnings on them? when I first saw those tools advertised, they were always in the R/C car section, i believe they were intended more for cars since the car guys were swapping flywheels/clutches alot, the shaft for an R/C car engine is pretty effortless to remove unless you use non-serviceable (red) loctite, even when i was in the car scene I never purchased one, i always used a hard wood dowel.

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10-27-2004 06:43 AM  13 years agoPost 36
YSRRider

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usa

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even if you dont damage the piston you can bend the wrist pin, bend the connecting rod or you could elongate the holes in the connecting rod.

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10-27-2004 10:26 AM  13 years agoPost 37
Al Magaloff

rrMaster

12,199 Posts- Enough​Time Wasted. See Ya!

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Sultan, if you consider a potatoe chip durable, then yes, most of today's pistons are constructed of durable aluminum.

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10-27-2004 12:14 PM  13 years agoPost 38
sultan68

rrApprentice

Broomfield, CO​Elevation 5420'

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Piston lock tool

Sorry, I forgot to mention all those engines still run without a problem. I will continue to use a piston lock tool for now. Taking the backplate off seems like so much work these days! Besides, I use toothbrushes for brushing teeth and wooden dowels for straightening bent booms.

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10-27-2004 06:02 PM  13 years agoPost 39
YSRRider

rrElite Veteran

usa

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i had a nice piece of mind all typed up for SULTAN68 and WINGTIP, i'll let their own ignorance bite them in the ass later, for now im just gonna shut up.

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10-27-2004 06:17 PM  13 years agoPost 40
sultan68

rrApprentice

Broomfield, CO​Elevation 5420'

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Please

I want to read it. YSRRider, perhaps if you would share your tips it would benefit someone?

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HelicopterBeginners Corner › Don't use "piston lock tools"
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