Steering Head Bearing Race extractor

Got some useful tips for doing a tricky job or know of a cheap alternate part? This is the place to list them.

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SteveJ
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Steering Head Bearing Race extractor

Postby SteveJ » Thu Oct 18, 2007 11:23 pm

I just got one of Ed Korn's steering head bearing race extractors through the post today.
A really clever piece of kit on first inspection. Its basically a machined up jig consisting of a split and tapered disc with a sharp leading edge, think a cutting wheel on a can opener the diameter of a headstock. It runs on a tapered plug connected to threaded stock which opens up the disc between the base of the race and it's seat. The race is then extracted by winding up a nut along the threaded stock.
Ed was really helpful and friendly, whole thing cost $67 (about 33) including post from the states, arr in 10 days (a cheque sent to Merseyside three weeks ago hasnt arrived yet :sad: ).
I'll post up some pictures of it in action when I get 'round to actually using it!
Check out Ed's tools for BMWs@
http://www.cycleworks.net/" onclick="window.open(this.href);return false;

(This sounds a bit like an advert but I was very impressed by this guys helpfulness and ingenuity)
Steve Jones
'85 R80 mono
'83 R80G/S

nad

Postby nad » Fri Oct 19, 2007 10:24 am

Steve

Bought mine about 3 years ago from him. His tools work and are of a decent quality for DIY work.

Nice bloke to deal with, I'm planning to buy a few more of his tools this Autum.

I'd recomend him.

Tim (Midland Section)

Postby Tim (Midland Section) » Fri Oct 19, 2007 9:12 pm

It's not just the outers than need a cute removal solution.
I used a Dremel type grinder to cut a small slot (1mm deep, 1mm wide) in the race inner, to create a weak spot. Then the fun bit, BIG hammer, favourite chisel, one good, well aimed clout, loud crack, followed by metallic ringing as the race rattled loose on the shaft.
To refit, put yoke in freezer overnight, New race centre in oven, work quickly, you only get ONE chance. DO NOT FORGET to put the new "seal" thingy on first.

Steve, I know who to ask, when I need to do mine. [-o<
HTH

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SteveJ
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Postby SteveJ » Sat Oct 20, 2007 1:36 am

Thanks for the tip about removing the race Tim. Apparently there's a BMW tool but I've never seen one, (is it a puller, a splitter?)
Cheers
s
Steve Jones
'85 R80 mono
'83 R80G/S

Tim (Midland Section)

Postby Tim (Midland Section) » Sat Oct 20, 2007 11:29 pm

The only BMW tool I am aware of, is for pulling the outer races from the headstock.
There should be an expert along soon.

Mike D
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Head Race Removal

Postby Mike D » Mon Oct 22, 2007 7:34 pm

AFAIK there isn't a puller for the inner race on the steering stem.

The original BMW manual suggests tapping the stem through the lower yoke to remove the race. The two pieces would then be reassembled and driven together. The idea was that as they were a tight fit, the steel stem cut its way into the aluminium yoke.

I actually witnessed this in a BMW dealership, when doing the job for the first time on my R100RS in 1979. You had to be careful to ensure that the stem went back exactly as removed, because if not, the hole for the steering lock didn't line up. (I fell for that one! )

Since then I have changed many sets and resort to the grinding/dremel and chisel method. Also agree with the idea of stem in freezer and race in oven (not for too long though), and don't forget that aluminium dust cap otherwise you've wasted your money on the bearing.

Regards

Mike

BMWOC Post /5 Toolhire Sec.

Pete Rihoy

Postby Pete Rihoy » Fri Oct 26, 2007 7:49 pm

Hi All,

I used this method on my K100LT and it worked perfectly, though you do need access to a MIG or Arc welder.

http://www.ibmwr.org/ktech/steer-bearing-removal.shtml

scuthber

Re: Steering Head Bearing Race extractor

Postby scuthber » Wed May 25, 2011 10:22 pm

I need to replace the bearings in my RS. Is there any way to get the puller from anywhere but the US?

Mike D
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Location: Near Daventry, UK

Re: Steering Head Bearing Race extractor

Postby Mike D » Wed May 25, 2011 10:43 pm

Hi,

There are a couple of specialist tools for the job.

See:

viewtopic.php?f=13&t=13413&p=82405#p83173" onclick="window.open(this.href);return false;

Where about are you, as although being the Toolhire Secretary of the BMW Club, so have the special tools available to members, I also have my own. If you are close enough to me you could borrow one.

Mike

scuthber

Re: Steering Head Bearing Race extractor

Postby scuthber » Tue May 31, 2011 4:51 pm

Hi Mike,

I'm in the west midlands... I've been researching the steering head bearing thing on the forums and there's plenty of info and suggestions about, including the Dremel option. My bearing's not too bad at the moment, but it definitely needs doing as I can feel it notching slightly when passing through stationary traffic.

Steve

Mike D
Forum User
Posts: 1646
Joined: Thu Oct 18, 2007 3:12 pm
Country of Residence: UK
Location: Near Daventry, UK

Re: Steering Head Bearing Race extractor

Postby Mike D » Tue May 31, 2011 5:53 pm

Hi Steve,

If it helps, I'm about six miles south of Daventry.

Mike

scuthber

Re: Steering Head Bearing Race extractor

Postby scuthber » Tue May 31, 2011 9:30 pm

That's not too far... "Toolhire Secretary" sounds pretty useful too... I'll have to buy a set of bearings and pluck up enough courage to strip the forks out.

Steve

Mike D
Forum User
Posts: 1646
Joined: Thu Oct 18, 2007 3:12 pm
Country of Residence: UK
Location: Near Daventry, UK

Re: Steering Head Bearing Race extractor

Postby Mike D » Wed Jun 01, 2011 8:52 am

Steve,

Don't forget to buy another aluminium dust cap (few pence) that is fitted beneath the bearing on bottom yoke. It always gets damaged as you remove the bearing.

You should be able to complete the job in a few hours.

P.S. Check the cost of the bearings from BMW as you may be suprised how cheap a set is.

Mike

scuthber

Re: Steering Head Bearing Race extractor

Postby scuthber » Thu Jun 02, 2011 2:51 pm

Checked the price of the bearings at the BMW dealer in Rednal & they want £22 each plus a tenner for the dust cover, so £50-odd pounds in total. I can get them for £35 inc. P&P, so that's the route to take. Nice looking at all the R1200RT's though. Worlds apart from mine!
I think that I might end up overhauling the forks as well though while I've got everything undone. They dive under braking quite a lot and seem to stick down a bit, so there's probably some seals gone somewhere.

Steve


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