Bearing Puller

[transatlantic]

I need to replace a bearing on my wheelchair. The bearing is located in a piece of round tubing (about 5mm thick) that isn't much bigger than the bearing itself. I've had a look around and there seems to be quite a few different types of pullers. Which one would be best suited to this job, seeing as I don't have much area for the puller to work with?

The first image shows the two bearings I need to change, and the second image shows the part of my wheelchair in question.

 

[flh801978]

You want need a puller for that
Prise off the top cover
there will be a nut...undo that
the fork will then come out below
then insert a punch or long screwdriver from above on to the bottom bearing and knock it down and out the spacer will fall out then repeat knocking up for the top one

gently tap in new ones remebering the spacer insert the fork and tighten the nut up ,replace cap

Ian

 

[transatlantic]

You want need a puller for that
Prise off the top cover
there will be a nut...undo that
the fork will then come out below
then insert a punch or long screwdriver from above on to the bottom bearing and knock it down and out the spacer will fall out then repeat knocking up for the top one

gently tap in new ones remebering the spacer insert the fork and tighten the nut up ,replace cap

Ian

I tried doing extactly that but after many taps, it isn't budging. Also, when you insert the punch (in my case a small socket), it's at an angle, so when you're tapping it, the force is going more into the sides, which I presume is why it isn't helping?

 

[Racers]

You need to tap 12:00 6:00 3:00 9:00 to drive the bearing down straight.

Pete

 

[transatlantic]

You need to tap 12:00 6:00 3:00 9:00 to drive the bearing down straight.

Pete

Yep - that is what I was doing, but after 10 minutes of that, it hadn't moved at all?

The bearing is already damaged (hence me changing it), so the inner ring is very loose (there is a few balls missing I think). I was worried that I may tap too hard and knock that inner ring off. If I do knock it off, is it game over?

 

[flh801978]

It depends on how deep the step is in the outer housing

Try and knock the undamaged one out first

You are passing the punch/drift /socket through the bearing that you are NOT trying to knock out? to knock out the opposite one?

 

[flh801978]

There isnt a circlip holding the outers in is there ( not shown in exploded diagram )
when you have bearings out there may be circlips locating the outers in the middle rather than a machined shoulder so then even if the inners have collapsed its easy to get the outers out

 

[ColeyS1]

Probably a silly suggestion but would some gentle heat perhaps help with tapping it out ?

Sent from my SM-G900F using Tapatalk

 

[transatlantic]

You are passing the punch/drift /socket through the bearing that you are NOT trying to knock out? to knock out the opposite one?

Yep. The top one is fine, it's just the bottom one I need to replace. The exploding diagram is not my chair, it was just an example. I'm not sure what is between the upper and lower bearing.

 

[Hot stuff]

There'll be a spacer between the two inner races which makes it nearly impossible to get at the outer edge of the bearing to get a solid chap at it. If the inner race comes out it's not game over, just makes it a bit harder. If that happens then the spacer will drop out too letting you see what's happening with the outer race.
Heat, as mentioned, is your friend here. A hot air gun or even a hair dryer is better than nothing then a few hefty smacks at 12, 6, etc, as you've been doing. Better trying that before you wreck the bearing completely.

 

[sunnybob]

Dont use heat. The bearings will come out from each end, you wont be able to push them through.

The secret is in the central spacer. Use a heavy screwdriver or bar that is a sloppy fit through the bearing. Lever the spacer to one side. THEN you can use a drift to knock the bottom bearing out by tapping opposite sides of that bearing.

turn the chair over and knock the other bearing out in the other direction.

Refitting is a reversal of the above, but as the final bearing is lined up for the final hit, put the shaft back through to get the central spacer correctly located before whacking the bearing.

 

[Phil Pascoe]

Are you actually registered disabled? If you are you should be able to phone up the company that supplied it and get it fixed.

 

[transatlantic]

Are you actually registered disabled? If you are you should be able to phone up the company that supplied it and get it fixed.

I am, but this is one of my chairs that wasn't provided by the Wheelchair service, one I bought myself.

I like trying to do stuff like this myself though, as it's good to know how it works so I can fix it. Of course I don't want to damage it though, as that would cost more to fix than getting someone to do it in the first place. I'll be spending the rest of my life confined to a wheelchair, so I figure leaning how to change a bearing like this makes sense.

 

[Phil Pascoe]

You and me both.