1952 18s swingarm bushes

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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1952 18s swingarm bushes

Postby Steve Harding » Sun Nov 10, 2019 3:12 pm

Just removed swingarm and alloy casting, to enable removal of sheared bolts for stand clip and powder coat arm.
I've used the search facility and realise I will probably have to get the tube pressed out.
I can see the bushes in the swingarm, are there bushes in the alloy bridge or is it a press fit?

Regards

Steve

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Re: 1952 18s swingarm bushes

Postby dave16mct » Sun Nov 10, 2019 3:55 pm

It's a press fit in the alloy bridge piece. You can make a long drift with a spigot to fit the pin or make a draw bolt with large washers and some studding and nuts to pull it out. Bit of heat on the alloy will help.
Dave

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Re: 1952 18s swingarm bushes

Postby Steve Harding » Sun Nov 10, 2019 6:18 pm

Thanks for the reply, I take it will be tight all the way through?

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Re: 1952 18s swingarm bushes

Postby Pharisee » Sun Nov 10, 2019 7:57 pm

I've changed a couple of pivot pins fairly recently. I used a length of 12mm studding and a piece of steel tube with a suitably sized socket and a large washer to draw the pin out. They weren't that tight and no heat was needed.

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Re: 1952 18s swingarm bushes

Postby asterysk_usa » Mon Nov 11, 2019 4:24 am

On a related issue, does anyone have a suggestion on how I can separate the bronze sintered inner from the outer part of the bush. The top hat shape of the bronze bush means I cant push against the ends of the outer. I'm loathed to try and hold the outer in a vice.

I did the other side correctly ! i.e. I pushed out the bronze first then pushed out the outer form the swing arm, learnt from my mistake !
1954 AJS 18S Cyprus export (frame decode says 1954 but many components match a 1955).

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Re: 1952 18s swingarm bushes

Postby Steve Harding » Mon Nov 11, 2019 12:15 pm

Thanks for the advice, managed to get it out but tube is badly pitted at on end, new bits required.
Was the alloy bridge originally painted?

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Re: 1952 18s swingarm bushes

Postby bitza » Tue Nov 12, 2019 12:42 pm

Painted same as the frame.check you have the small studs for the main stand retaing spring.

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Re: 1952 18s swingarm bushes

Postby Steve Harding » Fri Nov 15, 2019 5:14 pm

Swingarm flew back together with new bushes and tube etc.
I take it the end plate with the filler screw goes on the r/h side?

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Re: 1952 18s swingarm bushes

Postby Mick D » Fri Nov 15, 2019 5:31 pm

Hi

Yes and I've set mine with the filler point at 09:00 to allow access past the oil lines.

Regards Mick

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Re: 1952 18s swingarm bushes

Postby Steve Harding » Fri Nov 15, 2019 7:51 pm

Thanks for the tip

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