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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › taking the fan off a hyper 50
10-20-2009 04:34 PM  8 years agoPost 1
Wingman77

rrProfessor

Pulaski Tennessee

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hey guys, I am unable to get the fan of my hyper, it would appear that the taper collet is holding the whole thing on and I cannot get it out

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10-20-2009 04:39 PM  8 years agoPost 2
MikeSherman

rrVeteran

Racine, WI

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If you have the stock fan, it may screw on. Aftermarket fans, can be both colleted or screw on.

Your best bet, in my opinion, is to remove the carb and stick the end of a toothbrush into the crank to lock it.

Now just twist off the fan. IF it's screwed on tight, adding some heat to the fan will help loosen it.

DO NOT USE A PISTON LOCK TOOL OF ANY KIND.

-Mike

Team QuickUK Pilot
Team Heliproz

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10-20-2009 04:39 PM  8 years agoPost 3
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

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I've had that same problem...had to use a straight screw driver to help pry the parts apart...work slowly and very carefully, do not put tons of pressure because you do not want to bend anything else.

Team Synergy, Rail blades, Team Scorpion, V-Team

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10-20-2009 04:42 PM  8 years agoPost 4
Wingman77

rrProfessor

Pulaski Tennessee

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well I am sending it in for a warantee repair, do you think I should just leave it on.

oh and it is the vibe fan.

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10-20-2009 04:51 PM  8 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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You need a fan puller, MA sells them.

They will (probably) charge you labor to take it off if you send it for service that way.

Andy
AMA 77227
http://www.jaxrc.com

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10-20-2009 04:53 PM  8 years agoPost 6
Wingman77

rrProfessor

Pulaski Tennessee

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dagummit...

got a link for a good puller?

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10-20-2009 04:55 PM  8 years agoPost 7
rxwarrior

rrNovice

Mishawaka In. USA

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You can get a fan puler at rchover.com part #GFA7086 it comes from g-force products cost about 17.99

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10-20-2009 05:01 PM  8 years agoPost 8
MikeSherman

rrVeteran

Racine, WI

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You can make a simple puller if you have a piece of steel or aluminum and a tap for about a 1/4" screw.

You may just want to try some heat first. If you have a torch, iron or even a candle would work.

Just hold the motor upside down over the flame so that it is hitting the crank. Give it a few seconds and then twist off the fan. You may need a towel around the fan so it doesn't dig into your hand.

I never had a problem removing a 50 size fan by hand.

-Mike

Team QuickUK Pilot
Team Heliproz

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10-20-2009 05:17 PM  8 years agoPost 9
Wingman77

rrProfessor

Pulaski Tennessee

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well I just put the cooling can hub in a vice with the engine hanging below. I took the heat gun to it then one very gentle tap with a punch to the shaft and the engine just fell right out

I think the heat gun made a huge difference.

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10-20-2009 05:18 PM  8 years agoPost 10
MikeSherman

rrVeteran

Racine, WI

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Ahhh....collets!

Some guys, not knowing any better, do the same thing with a threaded fan and end up ruining the fan.

Glad you got it off the motor.

-Mike

Team QuickUK Pilot
Team Heliproz

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10-20-2009 05:54 PM  8 years agoPost 11
Tohme

rrApprentice

Sao Paulo - Brazil

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I´m used o lock with something like this...

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10-21-2009 08:27 AM  8 years agoPost 12
Aaron29

rrProfessor

USA

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Best locking tool is the nylon insert. You remove the backplate, rotate the engine to bottom dead center, push the insert over the rod, and it is secure.

It's secure but doesn't concentrate forces on the piston or pin. It is the only tool I recommend.

The toothbrush in the carb hole technique can damage the crankcase. The place on the crankcase where you are wedging the toothbrush into is very thin. Almost bladelike. The area can be damaged by any side forces. If you do it use a very soft handled toothbrush.

The toothbrush, however, is far better than jamming the top of the piston with a piston lock tool.

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10-21-2009 08:27 AM  8 years agoPost 13
Aaron29

rrProfessor

USA

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Yes, as I was posting, Tohme linked some pictures of the exact tool I recommend.

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10-21-2009 01:14 PM  8 years agoPost 14
MartyH

rrProfessor

USA

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Were you able to see that it was a collet type fan before you got it off? I'd hate to be prying and poking on one that screws on. As others mentioned, if you dont have the backplate locking tool, get one. They are the safest and least likely to damage components.

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10-21-2009 01:16 PM  8 years agoPost 15
MikeSherman

rrVeteran

Racine, WI

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Aaron -

All good points; however, it's my opinion that the toothbrush, though not the greatest, is still better than the delrin lock.

The delrin lock, from my understanding, installs from the rear around the connecting rod. Well guess whats taking all that torque - a very SOFT and thin brass bushing in the lower crank rod journal.

I've never seen a toothbrush win in a fight with hardened steel.

Just my 2c.

I do agree both are miles apart better than the screw in style.

-Mike

Team QuickUK Pilot
Team Heliproz

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10-21-2009 08:00 PM  8 years agoPost 16
BarracudaHockey

rrMaster

Jacksonville FL

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Cranklock is the way to go.

As for the Vibe fan, yes it's colleted. It will take you about 2 seconds to break loose with a fan puller.

Andy
AMA 77227
http://www.jaxrc.com

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10-22-2009 09:52 PM  8 years agoPost 17
TankDirt

rrKey Veteran

Illinois

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For years Ive just removed the glow plug, and put in small pieces of fuel tubeing through the exhaust port till it was full to lock the piston...Works great and you can put as much pressure on it as you want with no damage.

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10-22-2009 10:04 PM  8 years agoPost 18
Wingman77

rrProfessor

Pulaski Tennessee

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how in the world did this get off on crank locking?

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10-22-2009 10:22 PM  8 years agoPost 19
MikeSherman

rrVeteran

Racine, WI

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how in the world did this get off on crank locking?
The original poster did not know if his fan was screwed on or not, thus needing to lock the crank!

The rest was just added babble to make the workday pass.

-Mike

Team QuickUK Pilot
Team Heliproz

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10-22-2009 11:03 PM  8 years agoPost 20
racingstripe

rrVeteran

Sacramento, CA

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Puller for collet style fan hubs here.

andy-

Proofread carefully to see if you any words out.

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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › taking the fan off a hyper 50
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