Suspension bush pullers

[TheGriffalo]

I'm replacing the suspension bushes on my Griff with a poly kit. I can get the old wishbone ones pressed out at a workshop but I'm planning to do the rear hub ones in situ as I don't fancy undoing the hub nut. Has anyone done it in situ and got a link to a cost effective bush puller/extractor?

[AntonyJ]

Griffalo,if you are going as far as you are , undoing the big scary hub nut(not) isnt that much further to go is it?

Just go for it, good time to check the rear wheel bearings too.

[TheGriffalo]

True, but I would rather do them in situ if I can find a suitable tool.

[RedCabbage]

Do you mean a puller to take the whole standard bush out?
I made one in about 10 mins to pull the inner tube and rubber before hacksawing the outer sleeves.
It has done 9 out of 14 on the rear so far with no problems.

If you like I could post a photo tomorrow.

[TheGriffalo]

That would be good

I'm sure someone must make a bush extractor as you can't take the diff out every time a bush wears, surely...

[crackedfinger]

Take the diff out? Only need to that if you are replacing the diff bushes I would expect.

i replaces he bushes with the rear carriers in place, was simply a blast with the burner from both sides, the inner slide out easy then, then hacksaw the outer sleeve, get a socket of the right size, give it a tap and out it comes (eventually!). To avoid stressing the cv joints etc I did the whole procedure on top of buckets, as the rear carriers are quite heavy (i do wonder if they could be made a lot lighter, the seen way over the top).

[TheGriffalo]

For such a light car TVR's seem to carry a phenomenally high amount of unsprung weight I've shed loads from the front but the back end is still massively over weight IMO.

[adam_rbts]

Do you need to undo the hubnut..? What about unbolting the driveshaft from the diff, remove hub and driveshaft together, then unbolt driveshaft from the back of the hub?
You can then get the hub on a bench which IMHO would make life much easier..

[RedCabbage]

adam_rbts said:

Do you need to undo the hubnut..? What about unbolting the driveshaft from the diff, remove hub and driveshaft together, then unbolt driveshaft from the back of the hub?
You can then get the hub on a bench which IMHO would make life much easier..

Exactly, undo the six bolts on the Lobro and the upright can go on the bench which makes life a lot easier. Sorry I didn't photograph the pullers today, they were hard at work but I will charge the camera tonight and do it tomorrow.

[RedCabbage]

Here we go -



The top one is my diff bush puller the bottom one is my suspension bush puller. The Diff puller gets the whole thing in and out, is made by BritTool and had to be modified to clear welds on the chassis.

The suspension puller has fittings to pull the whole bush or just the inner. However I found that with the wishbones/uprights off the car I couldn't get enough leverage to get the whole bush out and found it easier to pull the inner before hacksawing the outer sleeve.

[TheGriffalo]

Thanks... I'm off to pick mine up from the local engineering shop this morning. I'll post pics up later, but it should look remarkably similar to yours.

[crackedfinger]

When taking the bushed & sleeves out I used the previously suggested burn and hacksaw out with a bit of encouragement from a hammer. The challenge I had was getting the new 2 part poly bushes all the way on in without damaging them, i.e would be easy with a press of some sort as it take quite a bit of pressure.

Instead of a proper press I used an old suspension bolt with lots of washers and wound them in. This made fitting the wishbones much easier as they are a tight fit to start with, and if the bush has not been compressed in fully it is a challenge to squeeze them back into the chassis mounts.

[TheGriffalo]

here's mine



Over engineered it a bit, but in theory I can attach it to my slide hammer while still applying a compression force and I can also use it to press the new ones in. I say theory, I haven't had time to try it out yet!

[chrispitman]

Tip - If your fitting poly bushes to aid in fitting place the bushes in the freezer for awhile and then get the wishbones warm not so hot that you cant hold them, also make shure there is no powdercoat/paint on the inside where the bush will fit. Then just push them in straight from the freezer as quick as you can, all mine went in easily using this method makes alot of dirrerence.

[RedCabbage]

TheGriffalo said:

here's mine



Over engineered it a bit, but in theory I can attach it to my slide hammer while still applying a compression force and I can also use it to press the new ones in. I say theory, I haven't had time to try it out yet!

Oooh! Nice and shiny.

Let us know how easy it is to use. My own experience was that it was easy to use a puller on the top diff bush because it was held securely by the chassis and therefore easy to apply a huge amount of torque. However with loose suspension components the torque required to pull the whole bush was too high and I resorted to pulling the middle and cutting the outer.

[TheGriffalo]

It only bloomin works

Five bushes, some on and some off the car in less than an hour... Doddle.

The over engineering definitely helps, You can thump it with a 2lb ball pein hammer while applying a compression force. Added to the fact that everything is at least 10mm thick the force goes where it's supposed to.

Result.

[RedCabbage]

Great effort!

Now go and tidy your bench.

[ray_von]

TheGriffalo said:

here's mine
Over engineered it a bit, but in theory I can attach it to my slide hammer while still applying a compression force and I can also use it to press the new ones in. I say theory, I haven't had time to try it out yet!

Sorry mate, that doesn't look over engineered at all. It looks like a 'proper bit of kit' 10/10 good job