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HelicopterAlignT-REX 700N › T-Rex 700 Main shaft bearing block - how to remove bearing?
06-02-2010 10:57 PM  7 years agoPost 1
snipealot

rrApprentice

Frederick, MD

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My top main shaft bearing on my 700LE is notchy, how in the heck do you remove the bearing from the bearing block/holder? I tried heating it up with a heat gun and tapping it on a wood block, what am I missing here?

Thanks!

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06-02-2010 11:33 PM  7 years agoPost 2
jschenck

rrProfessor

La Vista, NE.

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use a socket from your tool chest that just fits inside the bearing hole in the block and make sure there is clearance under it (hole in the wood block) to knock the bearing into. With some heat it should come right out I think.

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06-03-2010 12:11 AM  7 years agoPost 3
NQNA

rrElite Veteran

USA

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You can put it in the oven for about 15 mins at 350 degrees or so.. They will usually drop out with just a little force.. Don't burn yourself..

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06-03-2010 12:14 AM  7 years agoPost 4
Thumpernator

rrKey Veteran

Senoia, Georgia, USA

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I just did this the other day using a hair dryer and the socket method described above. Just a light tap and it fell right out.

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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06-03-2010 03:14 AM  7 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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Actually I heat stuff like this up with my old Monokote heat gun and hold it with a towel. then a solid tap with the right socket or drift will just about always knock them out. With something like engine bearings just smack it against a wood block and they pop right out.

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06-03-2010 04:40 AM  7 years agoPost 6
carzan

rrVeteran

Lone Star State

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Getting them out is the easy part. It's putting them back in that can really give ya fits if you don't have the right tools!

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06-03-2010 12:42 PM  7 years agoPost 7
marc8090

rrElite Veteran

Long Island, N.Y.

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If the bearing block is hot enough to easily get the old bearing out the new bearing should go in just as easily.

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06-03-2010 12:58 PM  7 years agoPost 8
snipealot

rrApprentice

Frederick, MD

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Thanks for all of the help...still having a hard time, she's in there pretty good. I must not be getting it hot enough.

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06-03-2010 01:28 PM  7 years agoPost 9
puma1824

rrVeteran

Maryland, USA

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As another had mentioned use sockets. Assuming you don't care about trashing the bearing that's coming out, I actually use one large socket larger than the bearing OD and a smaller one a slightly smaller than the smaller opening for the bearing in the block. Then I place the assembly in a C-clamp and screw in until it pops out. Kinda hard to describe in words but it works every time. 99% of the time NO heat required with the added benefit of no excessive force on the block.

I'll try and draw a picture or something or show you at the field.

*Edit drawing made ...make sense???

-Ron

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06-03-2010 03:41 PM  7 years agoPost 10
snipealot

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Frederick, MD

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Thanks Ron! I will give that a shot when I get home.

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06-03-2010 03:49 PM  7 years agoPost 11
PC12DRVR

rrKey Veteran

USA

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I used the socket method as well, and when I re installed the bearing, I had put the bearing in the freezer for about an hour, heated and oiled the block and the new bearing popped right back in.

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06-03-2010 06:59 PM  7 years agoPost 12
Rockohaulic

rrElite Veteran

Canyon Country, CA, USA, 3rd Rock from the Sun

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You did remove the 4 small screws and the retainer didn't you???

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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06-03-2010 07:21 PM  7 years agoPost 13
snipealot

rrApprentice

Frederick, MD

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You did remove the 4 small screws and the retainer didn't you???
You're kidding, right?

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06-04-2010 05:40 AM  7 years agoPost 14
puma1824

rrVeteran

Maryland, USA

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Thanks Ron! I will give that a shot when I get home.
No problem. So did it work out for you?

See you at the field.

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06-04-2010 01:00 PM  7 years agoPost 15
snipealot

rrApprentice

Frederick, MD

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Worked out great Ron, thanks again and thanks to everyone for the assistance.

I'n going to try and get down to the MHA Fun Fly on Sunday, weather permitting.

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