Fitting a waisted polybush?

[Skyedriver]

Tried the long bolt technique but the bush tends to twist rather than go into the housing. The steel insert is removed.

[hidetheelephants]

Warm it up a bit, clean the orifice and use some lubrication? Fnarr.

[GreenV8S]

You might need a locating collar to keep the free end of the long bolt centered in the hole. Use soap or washing up liquid to lubricate it. (Avoid oil, because some rubbers don't react well to some oils.)

[E-bmw]

If you have a "jubilee clip large enough, you can start with it "shrinking the end you are starting with & push through from behind (when it goes through the clip remove it obviously) but above that any water based lubricant works well, KY is good if you have any to hand.

[stevieturbo]

As others say, some lube, maybe some heat, but mainly it needs shrunk down, or at least a ring preventing it from expanding when pressed into the arm.

Whether a piston ring type tool, large wide banded clamp, tapered cone, etc etc.

[TwinKam]

I always hang onto every old tube, spacer, bearing shell etc that I change, as outer races, being tapered, are very handy to use as a compressing cone in this instance, as stevieturbo suggested above. A press is easier to use than a nut & bolt though.
My wife says there will be two skips ordered the day I die. Personally, I know she's gonna need four.

[Skyedriver]

E-bmw said:

If you have a "jubilee clip large enough, you can start with it "shrinking the end you are starting with & push through from behind (when it goes through the clip remove it obviously) but above that any water based lubricant works well, KY is good if you have any to hand.

First thought was the jubilee, I fitted two together, but they tend to lozenge the bush rather than a uniform compression. And as soon as the end gets in a little bit, the jubilee pushes up the taper and slides off, No more compression. Same goes to a lesser extent to the piston ring compressor.

[GreenV8S]

If you want to pre-shrink it then compress it with a jubilee clip and then bind it with button thread to stop it expanding. You can get some eye-watering compression forces by binding it, without increasing the diamater much.

[Skyedriver]

Interesting idea, worth a try.

[E-bmw]

Skyedriver said:

E-bmw said:

If you have a "jubilee clip large enough, you can start with it "shrinking the end you are starting with & push through from behind (when it goes through the clip remove it obviously) but above that any water based lubricant works well, KY is good if you have any to hand.

First thought was the jubilee, I fitted two together, but they tend to lozenge the bush rather than a uniform compression. And as soon as the end gets in a little bit, the jubilee pushes up the taper and slides off, No more compression. Same goes to a lesser extent to the piston ring compressor.

Yes, I know it comes off, but if you do it right (start with a big push) you are already in the waisted section and the lube will help you get it in.

A vice is normally my preferred method of applying compression as you can get the initial push out of the clip & into the waisted section much quicker which helps.

WRT the jubilee clip mis-shaping the bush, you need to fiddle with it a bit to keep it round but if you use 1 rather than 2 it is much easier, hence why I said "a jubilee clip large enough".

[Skyedriver]

E-bmw said:

Yes, I know it comes off, but if you do it right (start with a big push) you are already in the waisted section and the lube will help you get it in.

A vice is normally my preferred method of applying compression as you can get the initial push out of the clip & into the waisted section much quicker which helps.

WRT the jubilee clip mis-shaping the bush, you need to fiddle with it a bit to keep it round but if you use 1 rather than 2 it is much easier, hence why I said "a jubilee clip large enough".

Thanks, will try again, large collection of jubilees but typically none big enough. Used to have a big vice but left it behind in a house move 2 ago sadly. Just have a relatively diddy one now.
Once I get these two big ones in I've 4 smaller ones to fit. Hopefully easier.

[hidetheelephants]

If you were minded to buy something an arbor press might be of more use than a vice.

[Skyedriver]

hidetheelephants said:

If you were minded to buy something an arbor press might be of more use than a vice.

Not thought about it, always assumed presses were hydraulic and expensive. Just had a look and arbor presses aren't expensive at all. Are they any good for this sort of thing, what sort of load can they exert?

[hidetheelephants]

They usually state what force they can exert, with the caveat that chinese tonnes are a variable quantity.