RPM-meter SuperMajor

[Pascal]

Hi guys,

I have a 1961 SuperMajor with a vacuum fuelpump.

As my previous RPM-meter (tractormeter) was broke, I replaced it. I also replaced the RPM-cable.

But unfortunately, when I connected them, nothing happened: the RPM-meter didn't work.

It looks like to me, that the "whole" in the RPM-mechanisme next to the fuelpump has become round in stead of square (just like the RPM-cable).

A friend of mine gave me the advise to put a match in the RPM-mechanisme next to the fuelpump and see if it turned around. It did, but maybe just because of the vibration?

Does one of you have any tips to get the RPM-meter working?
Do I need to replace the RPM-mechanisme next to the fuelpump?

You can see somepictures at http://www.mijnalbum.nl/Album=4UZYMIHO

Thank youin advance!

[Grani]

Is the new meter exactly like the old one? On Majors with Minimec pump the meter is turning anticlockwise and will not work on your Major.

[Pascal]

Hi Grani,

Thank you for your reaction.
Yes, the new clock is the same as the old one.
I noticed that there were some different clocks.
I got myself the right one

[Grani]

Next you can check the little geardrive on the engineside. It is mounted with two bolts. When you take it off you can inspect the gear by turning it by hand. Sometime the problem it a little pin that secure the gear.

[Pascal]

Thank you for your advise, Grani!

I will give it a try the next few days. I'll let you know if it helped.

I surely hope so.

[Pascal]

Hi Grani,

I removed the geardrive on the engineside. It works perfectly.

When I compared the wholes (where the RPM-cable gets in) of the RPM-meter and the geardrive, I noticed that the whole of the geardrive is that much worn, that it doesn't turns the cable around.

Is it an idea to put some glue in the whole of the geardrive and then put in the cable?
Or don't you think that's a good idea?

[Emiel]

Hello Pascal,

What you can try is to beef up you cable with very thin sheets of foil. In dutch called "latoen koper" or maybe aluminium foil from the kitchen will work.

At least can you take these out when it doesn't work.

Give it a try

[Pascal]

Thank you very much for your advice, Emiel!

I will give it a try and let you know if it worked.

[Mike Kuscher]

Pascal,
OK, now to use my toolmaking background.
How to properly repair a worn square drive.
First, dismantle the gear and shaft from the casing.
Second, fill up the end of the hole with weld or brazing.
Now find a small engineering company that does Electro Discharge Machining, commonly know in the Uk and US as 'spark erosion', german is Funkenmachinen.
You will need to give them the exact size of the square on the end of the cable.
They will make a carbon electrode that is 0.15mm smaller than this.
They will then place the gear shaft under a dialectric in the tank of their machine, usually paraffin, and use the electrode to 'burn' a new, perfectly square hole for your drive.
The process should take approximately 10 minutes.
It will then be as good as new.

Mike

[Sandy Mac]

Or you could just buy a new angle drive unit.......
Sandy

[Grani]

Or you could just buy a new angle drive unit.......
Sandy

From where

[Tubal Cain]

Agriline at www.agrilineproducts.com, sell the right angled drive units for the tractor meters. Lok under the section headed Fordson Major.

Gerald

[Sandy Mac]

or here
http://cgi.ebay.co.uk/fordson-major-tra ... 18Q2el1247

sandy

[Pascal]

Hi guys,

Thank you very much for your reactions.

First I will try the option of Emiel.
If that I will buy another one, I think.