What is Inner Diameter of Air Pump Pulley? (Need Correct Drift to Remove Bearing) - PeachParts Mercedes-Benz Forum

EricSilver · #1 08-28-2007, 08:49 AM

I need to find, or fashion a Drift to push the bearing from my air pump pulley. What is the inner diameter?

I will either hammer the bearing out, or use a three-jaw gear puller. Has anyone who has done this found one method to be better than the other?

brewtoo · #2 08-28-2007, 09:59 AM

I just used a socket that fit, and hammered it out.

EricSilver · #3 08-28-2007, 10:17 AM

Thanks.

No problems at all getting it out?

Also, that was a good idea you described in one of your posts about heating the pulley and freezing the bearing. I intend to do that also.

I ordered the bearing yesterday from BearingsDirect.com, and should have it in time for my planned replacement on Friday.

brewtoo · #4 08-28-2007, 10:56 AM

Mine came out without too much fuss. YMMV.

EricSilver · #5 08-28-2007, 11:50 AM

Great. Thanks again.

gmercoleza · #6 08-28-2007, 11:56 AM

Be careful - when I did mine a month ago using a 3-jaw puller, the race separated and spewed the ball bearings out, then left a ring behind which was nearly impossible to remove. I don't even remember how I removed it, to be honest. The puller would work on a bearing that isn't as shot as mine was, but you still take your chances. In my opinion, use something to drift it out.

EricSilver · #7 08-28-2007, 12:01 PM

Quote:

Originally Posted by gmercoleza

Be careful - when I did mine a month ago using a 3-jaw puller, the race separated and spewed the ball bearings out, then left a ring behind which was nearly impossible to remove. I don't even remember how I removed it, to be honest. The puller would work on a bearing that isn't as shot as mine was, but you still take your chances. In my opinion, use something to drift it out.

Thanks -- that did not occur to me.

I am thinking I will probably need the puller to get the pulley/bearing off the pump shaft (I am certain it will not slide smoothly off). After that, I will hammer the bearing out of the pulley.

brewtoo · #8 08-28-2007, 12:17 PM

I don't remember that being a problem, but my memory is not what it used to be.

EricSilver · #9 08-28-2007, 12:25 PM

Quote:

Originally Posted by brewtoo

I don't remember that being a problem, but my memory is not what it used to be.

OK. I saw one in a parts store clearance bin, before I decided to do this repair, and saw it as a sign that I may need it. Should be cheap insurance for just $9.

Also there should be two locking rings requiring removal, correct? One that secures the pulley to the shaft, and one that secures the bearing in the pulley?

gmercoleza · #10 08-28-2007, 02:09 PM

Yes, I believe there are 2 locking rings.

brewtoo · #11 08-28-2007, 02:32 PM

That's right. You'll need a c-clip tool.

gmercoleza · #12 08-28-2007, 04:35 PM

I just used a tiny pair of needle-nose pliers I had on hand. I suppose a large pair would work too. The tips just have to be tiny enough to fit the holes of the c-clip.

EricSilver · #13 08-30-2007, 08:37 PM

Quote:

Originally Posted by gmercoleza

Be careful - when I did mine a month ago using a 3-jaw puller, the race separated and spewed the ball bearings out, then left a ring behind which was nearly impossible to remove.

Got mine out of the car a while ago, and that is precisely what happened when I pushed the bearing with my thunbs.

You certain you don't remember how you removed the ring?