sub frame / radius arm

[huwbertus]

Decided to get my Marcos rolling again only to be left scratching my head.

It appears that
a) My new subframe is out of alignment
b) My reconditioned radius arm is faulty

when mounting the radius arm in the subframe all goes well right up untill the four bolts that hold the outer pivot support plate need to be insterted. The problem seems to be that the radius arm pivot shaft is too long as the bolt holes are about 4mm out of alignment.

If you understand me I would appreciate some ideas

Cheers Huw

[huwbertus]

With the big washers I am assuming that there should be one at each end of the radius arm pivot and it is this that is effectivley making the radius arm pivot to long, pushing the mounting bracket out to a point where it can not be bolted on.

[huwbertus]

If I get a chance I'll have a look tonight.

Any idea how long the shaft should be between mating faces? And how big the gap in the subframe should be?

To me it looks like the shaft is sitting a little proud one side of the radius arm. Should the mating faces (Where the tread ends) be flush with the outer edge of the arm?

[huwbertus]

Ok then Guru here you go

1 It is a pattern frame
2,3 Yes. The arm is a reconditioned exchange unit

Bought from my local parts suppliers months ago (Partco and CES) as the price was about the same as most mail order outlets without the postage costs!

[huwbertus]

Tried the bearing rod from the other side in my re-con arm and it fits OK ish!!!!!! So I will be getting the bearing rod turned down a couple of mm.

One bolt hole was still out of alignment though on the subframe.

Cheers for all the help
Later
Huw

[huwbertus]

Sorted. Bought a radius arm rebuild kit instead of turnig the original one down and it fits like a glove.

I eould advise that when buying a reconditioned radius arm to do up the nuts each end complete with washers (leave the rubber seals off) to make sure that the arm bearing is not to long. there should be hardly any movement along the axis of the bearing.

If I had done this it would have saved me £15.

Cheers for all the support
Huw