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Massey Harris & Massey Ferguson Tractors Discussion Forum

fuel gauge problem

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MARK

07-22-2003 11:39:19

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I have a 1968 M/F 135 Diesel Deluxe. It is absolutely awsome! My problem is...

The fuel gauge reads full when the tank is full.
The gauge starts working its way down...and when it reads 5/8ths of a tank, I'm out of fuel and spraying starting fluid in the air cleaner to get it to restart...which the tractor really doesn't like...and eventually I'll probably damage it from the starting fluid as it makes noises that are not good when I have to do it.

Obviously, I will avoid ever running it out of fuel ever again...but it's one of those deals that I own the tractor...it's at my hunting cabin and others (a 71 year old friend of mine) has accidently run it out twice. I have several questions...

If it runs out of fuel again (God Forbid), how do I restart it without starting fluid?

What is that lever for on the I assume fuel pump on the right side of engine block?

Does the tractor have any fuel filters?

The agg-lo-glomm-eter (who came up with that?)...the glass bowl thing on the left side of the tractor rearward of the engine...what is that and what am I supposed to do with it/ to it?

How do you test the fuel gauge to determine if it's the sending unit or the gauge itself?

Are the parts expensive...do you know? Are they readily available from AGCO?

Should I bother fixing it...I think so?

Has anyone had the same problem?

Anyway, thanks for the help. It amazes me that something that old is engineered as well as it is and works so great. I appreciate it...as you guys generally really know the answers!

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Charlie

07-23-2003 18:55:51

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Re: fuel gauge problem in reply to MARK, 07-22-2003 11:39:19

You could replace the tank sensor and while you have the new one out connect wire to screw terminal and ground the edge of sensor. Now you can try and see if gauge reads correct when float is in full position and when float is donw does the gauge read empty. You could use a stick to measure level and put a notch on it to indicate "too low needs fuel for your old friend". I have used a stick on a MF65 for 25 yrs. I fixed gauge and sensor on a MF 1100 that I have. The local dealer might beable to get sensor unit.

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Big Dean

07-22-2003 20:49:20

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Re: fuel gauge problem in reply to MARK, 07-22-2003 11:39:19

Hi Mark If you will send me an Email address I will send you a picture with details showing how to bleed the fuel system. You want to be careful using starting fluid on those engines it only takes a little to much one time to bust the piston in them. I have built a lot more of those engines because of that than I have that were worn out.

Big Dean's Massey Ferguson web site

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red-n-green

07-22-2003 17:52:01

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Re: fuel gauge problem in reply to MARK, 07-22-2003 11:39:19

First thing to do when you run a diesel out of fuel is to bleed all air out of the fuel lines. You should have a bleeder valve or bleeder screw on the fuel filter. And the lever on the lift pump is for pumping air out and fuel in by hand. You work the lines closest to the lift pump first and work your way to the injectors. Take the line loose at the injector pump and pump fuel by hand with the pump lever or make sure the engine shutoff is in the off position and turn the engine over until fuel comes out of the lines. DO NOT stand or keep your hand in front of any open fuel lines as they can have have extreme pressure and can blow the fuel through you skin. You may have to loosen the lines at the injectors to get the air out of all the lines. You can shoot a little starting fluid to help give it a boost but I wouldn't use much. Starting fluid is much worse on a dry engine than one with fuel in it. The diesel fuel acts as a lubricant and without it the starting fluid could burn up the rings.

The glass bowl is probably your fuel strainer. Your model may not have a spin on or cartridge type filter. Does the glass bowl have a screw on the bottom? And if so, loosen the screw and drain any water and trash out.

A new fuel guage should only be about $30 and a sending unit should be about the same. To check the one you have, take the sending unit out of the tank and operate it by hand while watching the gauge. These parts are easy to get and can probably be bought cheaper online than at a dealer.

My fingers are getting tired now, so if you have any more questions, I will be glad to try and help.

Jay

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