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HelicopterAlignT-REX 600N › 600 N fan puller?
07-07-2008 02:20 PM  9 years agoPost 1
cliffbarrimore

rrApprentice

Welcome Bay, Tauranga, New Zealand

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Hi all.... not that this is a problem yet, but when I need to get new bearings in my os 50 hyper, what/ how are you getting the fan assembly off the engine....the only reason I ask is when I fitted mine I had to use the prop nut to wind it down, so I guess its going to be a slight issue getting it off...

just looking for ideas so I can be prepared

Cliff

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07-08-2008 12:41 AM  9 years agoPost 2
deisel

rrApprentice

north carolina us

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did you loosen the two crub screws before you installed the fan hub

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07-08-2008 01:40 AM  9 years agoPost 3
Helijost

rrApprentice

Pevely, MO - USA

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If you take the two pinch screws loose and the fan still won't come off, you will need to heat up the assy to get it off.

Team Mikado USA

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07-08-2008 02:59 AM  9 years agoPost 4
Forced_Inductio

rrApprentice

Camrose, AB

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i use a medium sized flat screwdriver between the fan and the crankcase. dont twist it against the crankcase, but use it like a lever. mines come off every time without even scoring the crankcase or bearing.

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07-08-2008 03:00 AM  9 years agoPost 5
Nightstalker

rrElite Veteran

UK (BEDFORDSHIRE)

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Once you have the two pinch screws loose just stick the nut back on the crank shaft and get a socket and hold the fan only and hit the socket, It will then come free very easy and safe with no risk of damage and no need for heating anything up

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07-08-2008 04:57 AM  9 years agoPost 6
allenl

rrApprentice

Petaluma, CA

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MA fan puller

Hey Cliff,

This is what I use from back when I had a bunch of Min Air helis. This tool comes in handy more times then I can count. The part number is 0554 Fan Hub/Flywheel Puller.

http://www.heliproz.com/prodinfo.asp?number=114865

allen

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07-08-2008 06:11 AM  9 years agoPost 7
mille man

rrNovice

San Bruno, California U.S.A.

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removing fan assembly...

what's so hard about it????
i just pull and twist it off like it was screwed on.
(just make sure you have the crankshaft locked. or you'll be twisting all day long. haha)
comes off for me all the time.
no tools or thing-a-ma-jiggies required.
always try the simple way first.
good luck!!!
---rich (mille man)

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07-08-2008 07:30 AM  9 years agoPost 8
cliffbarrimore

rrApprentice

Welcome Bay, Tauranga, New Zealand

My Posts: All  Forum  Topic

Ok thanks for the replies....

I dont need just yet to take it off, but It was really hard to get on, I was at the point of having to bash it with a hammer, but used the prop nut to wind it down, it was really tough to get on, I guess I got a tight one...and yes I took out the pinch bolts and opened up the slots with a screw driver and put the engine in the freezer and hub in boiling water and it was still hard to get on....hence the question of how to get it of when the time comes

Cliff

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07-08-2008 07:32 AM  9 years agoPost 9
cliffbarrimore

rrApprentice

Welcome Bay, Tauranga, New Zealand

My Posts: All  Forum  Topic

This is what I use from back when I had a bunch of Min Air helis. This tool comes in handy more times then I can count. The part number is 0554 Fan Hub/Flywheel Puller.

http://www.heliproz.com/prodinfo.asp?number=114865
that looks just what I need

thanks

Cliff

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07-08-2008 01:56 PM  9 years agoPost 10
baddynergy

rrElite Veteran

sierra madre, ca- usa

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hub in boiling water and it was still hard to get on
THat was part of your problem. When you heated the hub you caused the metal to expand making the hole smaller. Next time freeze it.

**Unattended children will be givin a shot of espresso and a puppy**

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07-08-2008 02:37 PM  9 years agoPost 11
cliffbarrimore

rrApprentice

Welcome Bay, Tauranga, New Zealand

My Posts: All  Forum  Topic

ok so when I heat it to get it off the hole gets smaller making it harder to get off...heat the hub it expands cool the crank and it shrinks....why would anyone say use heat if the hole got smaller?????

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07-08-2008 02:58 PM  9 years agoPost 12
floop

rrVeteran

Southern, NJ

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I used a big pair of pliers. Put the but end on the pliers around the engine and have them touch the fan in two points. Then lightly tap the head of the pliers with a rubber mallet. It should come lose easily then.

IT's what I do.

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07-08-2008 03:41 PM  9 years agoPost 13
baddynergy

rrElite Veteran

sierra madre, ca- usa

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.why would anyone say use heat if the hole got smaller?????
you may be confusing heating the crankcase to remove the bearings from the engine.

For an easy way to get the hub off, remove all bolts and gently twist the hub off while using a crank lock. When it is installed you cannot heat the hub without heating the crank. You can also try LIGHTLY honing the inside of the hub with a small brake hone. Make one pass and with the hone check fit, repeat GENTLY if needed.

**Unattended children will be givin a shot of espresso and a puppy**

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07-08-2008 05:40 PM  9 years agoPost 14
Zaneman007

rrElite Veteran

Texas - USA

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I just pulled mine off this past weekend, no problems.

Are you guys having problems?

Old Guys Rule!

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07-08-2008 05:44 PM  9 years agoPost 15
Helijost

rrApprentice

Pevely, MO - USA

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Ok. you heat the crank, not the fan. I have seen multiple of these where guys have put loctite on the pinch screws and got a little(ok alot) over zealous. The loctite leaks on the shaft and attaches itself between the fan and the crank.

Team Mikado USA

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