Dummie’s guide to carrier steering and brake adjustment please

[colin jones]

darryl, if by raising the cam by 2-3mm can fix it then I would do it as it will not effect the operation of the machine. The cam sits on a thickish washer above the bearing so it is possible the washer was removed some time ago. I have had the same problem before and by raising the cam solved the problem for me.
Colin.

[Big D]

Hi Colin,

There is a washer under the castellated nut on the top but no washer between the bearing and the pivot pin. That seems to me to be the easiest fix as well - just a suitably sized washer fitted between the pivot and bearing.

Thanks

Darryl

[ron]

Hi Darryl &Lyn.
This is all that I have and its not much help really,
Regards Ron

[Big D]

Hi Ron,

Thanks for that. That diagram is also what I have.

It looks like a suitably machined washer will have to do the trick.

Thanks.

Darryl

[ron]

Darryl,
Now that you have the cam plate out on the bench,take off the large nut in the center of the plate and lift off the cam plate of the shaft, undo the three screws and take off the small cover plate that covers the bearing check that for any loose play, you can buy them at any bearing shop for a few dollars, tap off the cam plate from the shaft and place one or two washers on the shoulder of the shaft then reinstall the cam plate, that should then give you enough clearance to clear the surround that the cam plate is bolted to on the floor,also before you reinstall the plate check the clevis bar for play and if its to sloppy replace the pin or rebore the pin hole and fit an oversize pin to take up the slack,
Good luck Regards Ron

[Lynn Eades]

Can you post the page with the part numbers, that go with the pic.
thanks.

[ron]

Hi Lyn, here are a couple of pics as requested
Regards Ron

[ron]

another one

[ron]

This is the last page dealing with the track displacment

[Big D]

Hi Ron.

Thanks for those. They look a little different to the pages from the Australian carrier parts manual I have but I will check them out.

Cheers

Darryl

[Big D]

Hi Ron,

What is the manual you are referring to?

The one I have is the:

Australian Military Forces
Carriers, Machine Gun
LP., Nos. 2 & 2A
SPARE PARTS
Idenitifcation List

Mechanisation Pamphlet No 7B, 1942.


It doesn't have the pages you have in yours though.

Can you advise please?

Thanks

Darryl

[ron]

Hi Darryl,
The pics that I posted came from.
Carrier M.G
Aust
Spare Parts.
Catalogue
And Identifcation list
Revised,

August 1943,
Darryl the old catalogue was 7b, the one that I posted is 7B Revised
Regards Ron

[Big D]

Hi Ron,

Thanks for that.

I thought I would give everyone the latest on my wee project to see if any of you carrier gurus could offer some more advice. I find it also helps to think through the problem by describing it in writing.

After getting the camplate assembly out I did an overhaul of it.

I found the left side clevis (the problem one) to be quite sloppy in how it fitted around the camplate. I fixed this by squeezing up the entire opening on the end of the clevis and now it fits much more snugly around the camplate. The screw fitting at the end was still a nice fit. The movement that was obvious in this clevis before is now gone.

The right side clevis looked good.

I took the covers off the bearing and found that to be in good condition.

I cleaned up the baseplate, put a bit of paint on it and reassembled everything using a wee bit of loctite on the clevis screws.

I got one of the club guys to make up a nice washer of about 3 mm thickness to fit onto the cam. This seemed to do the trick and I figured the extra height with the raising of the camplate would do the trick in clearing the hullplate.

I refitted the whole camplate assembly today and from what I could initially see there was a good 2 mm of clearance between the underside of the clevis on each side to the metal surround on the hull that the camplate is bolted into.

All good I thought.

However, I then noticed the tops of the clevises were now rubbing on the hull cross-shaft! This was something I hadn’t even considered. From a distance there seemed to be enough clearance here.

I took the camplate assembly right out again and removed the washer I had put on. I refitted the camplate assembly and then managed to get a feeler gauge between the right side clevis and the hull cross shaft. Without mucking around too much with various gauge sizes I found there was about 1.75mm of clearance. I figure there may be a maximum of 2mm in clearance but I’ll confirm this once I get more time.

Obviously something isn’t quite right here and I expected a little more in the way of leeway between the bottom of the hull cross shaft and the tops of the clevises.

I’m now back to thinking about a combination of little fixes which might help solve the overall problem:

• Get another thin washer made of about 1mm in thickness to go on the camshaft
• Grind down about 0.5mm off the length of the top side of each clevis, which with the added height should help it clear the hull cross-shaft
• Grind down the underside of the front of each clevis by about 1 mm, which should help it clear the plate on the hull
• Grind down the plate on the hull that the clevis rides over, but getting at this area is still a problem


I figure there is not the clearance availabe to just fit a thinner washer and solve the problem.

Any thoughts chaps? Appreciate all the advice to date.


Thanks

Darryl