Another 40 series woe ...

[bobk]

So this tractor has always a tendancy to throw a 27 error code which is easily sorted

7840 sle with electro linkage blue roof

This time though the dash is reading 99 and the arms are at 0 , wtf is going on @agrimax @forblue @Nearly

 

[Nearly]

It reads the arm position from a variable resistor on the right hand lift shaft end.
Has the little link fastening the top lift arm to the resistor fallen off or has the wire to it broken?

 

[bobk]

It reads the arm position from a variable resistor on the right hand lift shaft end.
Has the little link fastening the top lift arm to the resistor fallen off or has the wire to it broken?

I will investigate , thanks .

 

[bobk]

May have found the problem , one of the wires on the potentiometer has busted , now , where do you get a potentiometer ?

 

[Nearly]

Dealer or breaker?
Might be available none genuine.
Others will know better.
I've done the hard bit. 8)

 

[bobk]

Dealer or breaker?
Might be available none genuine.
Others will know better.
I've done the hard bit. 8)

Not surprising the wire has given up , that connector has been pulled apart that many times ,

 

[bobk]

Dealer or breaker?
Might be available none genuine.
Others will know better.
I've done the hard bit. 8)

Is this the potentiom ?

Black wire bust bottom right of pic , goes to the black connector

 

[agrimax]

Best price here for a new one...

Ford New Holland Potentiometer - MDE agri parts

www.mdeagriparts.co.uk

Malpas and Kramp supply them too but are a good bit dearer. Clutch pedal and quadrant lever use the same pot if you're looking at a breakers.

 

[Blue_In_Shropshire]

Im sure ive got a few spare new ones in the garage. You can have one for whatever it cost me.

One thing to note- From that black broken wire, follow the short length of cabling to the plastic plug. Check that there are no rubbed/ bare wires on the tractor loom side of that plug.

To deal with lift arm errors, that black plastic 3 pin plug/socket usually gets pulled apart, as this is the easiest joint to get to. As it has been said, many 40 series have had this area pulled apart that many times, it sometimes can put stress on the three wires for at least 6 inches after the plug, going deeper down into the wiring loom above the hyd pump.

The result of this is, new Potentiometer gets fitted, works fine for a few weeks then errors 27 and 28 show up again!

If anyone needs these Pots or replacement plug for the tractor side of the joint, then private message me.


-Bluey

 

[bobk]

Found this one http://www.fordtractorspares.co.uk/product/potentiometer-ford-40s-clutch-hydraulics/

Doesn't look like the correct connector