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RPM-meter SuperMajor

Posted: Wed Jun 25, 2008 8:34 pm
by 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!

Posted: Thu Jun 26, 2008 11:57 am
by 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.

Posted: Thu Jun 26, 2008 6:09 pm
by 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 :)

Posted: Fri Jun 27, 2008 4:57 am
by 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.

Posted: Fri Jun 27, 2008 7:09 pm
by 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.

Posted: Sat Jun 28, 2008 7:27 pm
by 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. :cry:

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?

Posted: Sun Jun 29, 2008 8:53 am
by 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

Posted: Sun Jun 29, 2008 8:43 pm
by Pascal
Thank you very much for your advice, Emiel!

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

Worn square drive

Posted: Mon Jun 30, 2008 12:12 am
by 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

Posted: Mon Jun 30, 2008 9:03 am
by Sandy Mac
Or you could just buy a new angle drive unit.......
Sandy

Posted: Mon Jun 30, 2008 1:58 pm
by Grani
Sandy Mac wrote:Or you could just buy a new angle drive unit.......
Sandy
From where :?:

Posted: Mon Jun 30, 2008 4:27 pm
by 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

Posted: Mon Jun 30, 2008 4:38 pm
by Sandy Mac

Posted: Wed Jul 02, 2008 6:00 pm
by 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.