Dis-assembly of Megarange Freewheel

Jeffrey June

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Jun 16, 2001, 9:28:17 PM6/16/01

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Anyone know what tool is required to remove the lockring on a Shimano
Megarange 6-speed freewheel? I tried the old two-chainwhip procedure,
working on just the cogs themselves, but there is apparently a lockring with
evenly spaced notches that secures the small cog. I looked in the QBP
catalog for a possible tool, but found nothing. This has me stumped.

Thanks.

Jeff
(aiki...@worldnet.att.net)

Sheldon Brown

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Jun 17, 2001, 3:01:48 PM6/17/01

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Jeffrey June wrote:
>
> Anyone know what tool is required to remove the lockring on a Shimano
> Megarange 6-speed freewheel? I tried the old two-chainwhip procedure,
> working on just the cogs themselves, but there is apparently a lockring with
> evenly spaced notches that secures the small cog. I looked in the QBP
> catalog for a possible tool, but found nothing. This has me stumped.

It can be done with an adjustable spanner wrench, or with a hammer and
punch, but there's not much point since replacement sprockets are not available.

Sheldon "No Special Tool Available" Brown
+---------------------------------------+
| Whatever became of eternal truth? |
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Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772, 617-244-1040 FAX 617-244-1041
http://harriscyclery.com
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http://captainbike.com http://sheldonbrown.com

kh6...@pe.net

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Jun 17, 2001, 6:28:21 PM6/17/01

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Sheldon Brown <Capt...@sheldonbrown.com> wrote:

: Jeffrey June wrote:
:>
:> Anyone know what tool is required to remove the lockring on a Shimano
:> Megarange 6-speed freewheel? I tried the old two-chainwhip procedure,
:> working on just the cogs themselves, but there is apparently a lockring with
:> evenly spaced notches that secures the small cog. I looked in the QBP
:> catalog for a possible tool, but found nothing. This has me stumped.

: It can be done with an adjustable spanner wrench, or with a hammer and
: punch, but there's not much point since replacement sprockets are not available.

:

I like the punch method myself.

Sometimes we like to put the new cogs on a better freewheel body since
the megarange freewheel body is kinda a piece of junk (no offense). There
is some grinding involved to do this however.

--------------------------------
Bob Masse' kh6...@PE.NET
--------------------------------

neill currie

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Jun 23, 2001, 7:42:39 AM6/23/01

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It uses either the recommended Shimano tool(from your LBS), or if you have
one, a Shimano Freewheel removing tool. The splines are the same on both,
just deeper on the latter.
You use one chainwhip for removal only, plus the tool.

"Jeffrey June" <aiki...@worldnet.att.net> wrote in message
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neill currie

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Jun 23, 2001, 7:44:30 AM6/23/01

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Just noticed that you are trying to get a FREEWHEEL apart, not a cassette.
Sorry, not familiar with THAT tool.

"Jeffrey June" <aiki...@worldnet.att.net> wrote in message
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A Muzi

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Jun 23, 2001, 7:58:32 PM6/23/01

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The Mega freewheel has a lockring on the top that holds the cogs to the body.
Remove it with a punch while holding the freewheel by the low gear cog in a
cog vise.

neill currie wrote:

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Yellow Jersey, Ltd
http://www.yellowjersey.org
Open every day since 1 April, 1971

Jeffrey June

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Jun 25, 2001, 12:18:46 AM6/25/01

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The punch method works, but as Sheldon pointed out in an e-mail to me, there
aren't any individual cogs to be had that will fit onto the thing. I was
hoping to fill in the gap between the 24t and 34t cogs (with at least one
other cog, say a 28 or 30) Oh, well. Thanks for the replies.

Jeff

"A Muzi" <am...@yellowjersey.org> wrote in message
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