HELP - Need Help Installing a DA Crankarm - I'm at a Loss

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2010-01-15 9:06 PM

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Subject: HELP - Need Help Installing a DA Crankarm - I'm at a Loss
Hi all.  A buddy of mine got a deal on DA crankarms and bottom bracket.  I've got some tools, so he's at my place and we're trying to install it on his ride.

The drive side of the DA crank has no installation cover.  It's just a smooth side.  The other side (non-drive side) has what looks like an allenwrench style cover.

How do we get that allen wrench style cover out?  Do we need a special tool?

For that matter, does anyone have a link for a good install site to help with this installation.  ParkTool has a pretty good site, but I've still got questions.

Thanks for the help!!

-Joel

2010-01-15 9:14 PM
in reply to: #2616825

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Subject: RE: HELP - Need Help Installing a DA Crankarm - I'm at a Loss
Outter cover is usually reverse threaded. It pulls the arm off when you use the allen wrench to unscrew the inner bolt that actually holds the arm on. The outter cover needs to be in place to ttake the arm off but not needed to put it on. It can be put on afterward.

Hope this helps.
2010-01-15 9:16 PM
in reply to: #2616825

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Subject: RE: HELP - Need Help Installing a DA Crankarm - I'm at a Loss
BTW, sorry for the spelling...
2010-01-15 10:26 PM
in reply to: #2616825

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Subject: RE: HELP - Need Help Installing a DA Crankarm - I'm at a Loss
I unscrewed the bolt in the middle of my 7800 crank arm with a pair of needle nose pliers extended. I'm sure shimano has some $15 tool "required" to do it though.

On my 7800 installation went like this:

1. Install bottom bracket (I did use the Shimano wrench to screw it into the frame...though you could probably get by without it if you didn't mind scratching the BB a bit.)

2.) slide drive side into bottom bracket (might need to be a bit forceful.)

3.) slide other arm on.

4.) Screw in the 2 smaller bolts (one on each side) with allen wrench.

5.) Screw in the middle bolt with my fingers, tighten with needle nose's extended into the grooves.

the end.
2010-01-16 12:16 AM
in reply to: #2616912

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Subject: RE: HELP - Need Help Installing a DA Crankarm - I'm at a Loss
Leegoocrap - 2010-01-15 10:26 PM I unscrewed the bolt in the middle of my 7800 crank arm with a pair of needle nose pliers extended. I'm sure shimano has some $15 tool "required" to do it though.

That's basically what we ended up doing.  He's going to take it to the LBS to get it snugged up tomorrow.  It's looking good and running very smoothly right now.  After being tightened to spec tomorrow morning, he'll be ready to ride.

Thanks for all the help!!

-Joel
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