Re: Broken clutch knob

Peter Santangeli

Unfortunately, the piece that remains in the mount is 3mm INSIDE the
casting (the knob came off with 5mm - enough to leave the rest truely


--- In ap-gto@..., "Rick K" <JunkMailGoesHere@...> wrote:

--- In ap-gto@..., "Peter Santangeli" <peter@> wrote:

Sadly, while setting up today in my yard, I went to tighten one of my
RA clutch knobs on my AP900 and it snapped off in my hand. It broke
off about 5mm down, so that I can just see about 2 mm of the bolt
inside of it. The rest of the shaft is no doubt stuck down in the hole
it screws into.

A couple of questions...

Is there a way for me to get the shaft out?
Can I order a replacement?
Am I stuck sending my RA assembly back to AP :-(
Any danger of me using it this way until a convenient time?

I'm really surprise - I've never, ever tightened this much. Never used
hex keys, for instance. I must be stronger than I thought!

Sounds like you had a faulty part. I doubt that you could have twisted
it off otherwise. Now, getting it out is going to be a thorny issue.

One of the first things that come to mind is to use a Dremel tool with
a cut-off wheel attachement to carefully grind a slot across the
exposed end of the 2mm portion extending out of the piece and then use
a flat blade screwdriver to back it out.

Another is to use a brand new set of high quality vise grips so that
the biting edge is new and sharp. 2mm isn't much to grip but it might
be possible.

The next obvious method is using a bolt extractor, but this will
probably require a drill press and some sort of jig to hold the head
in position. You might be able to use a hand held drill to drill the
hole for the extractor if you use a Dremel and grind a cross centered
on the exposed broken end. The center of the cross will act a a guide
to center the bit for the hole. If it looks like this isn't going to
work, or you are not mechanically inclined with small parts and
precise work, I think taking the head to a machine shop or possibly
shipping it back to AP is in order. Give AP a call on Monday and see
what they say.

In the meantime, I can't see why you can't use the mount.


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