question Repairing my Zetor 6945

[Vikafarm]

I dont have issue with that it sounds good but I can see enough under the cab. I'll leave the orginal cables in place and mark them, so when I get time next year i can see if I can get to the bottom of things

 

[Vikafarm]

I'll post here rather than starting something new, the fans for the heating need replacing. This is done from inside or by taking the roof off?

 

[Joachim]

You can lift up the cab roof in front of cab a litle bit, that makes it easier to change them.

 

[Vikafarm]

Perfect thank you so much, do you have any idea what the part number for the grill cover for them? I have one but am missing the other. I´ve found part ZE 59117807 but it doesn't match the one I have.

 

[Vikafarm]

So next thing to fix is the alternator. From the look of the electrics throughout the tractor I'm pretty sure a monkey has been doing the wiring . I don't think it was connected properly before but the previous alternator is heavily corroded.
I've got a new one with an in-built regulator. There's a b+ and b- which are straightforward.
I have two wires unconnected at the moment a red and grey. The red is reading around 10v without the tractor running and the grey isn't reading anything. I'm guessing the grey is for the D+ (I've not check this goes to the light on the dash) but does that sound right?
Currently there's D+ and W terminals on the new alternator.
Also where would I find the regulator if it's not been previously removed?

Attached photos are of the old alternator and the terminals of the new one.

 

[Joachim]

OK, thats not the original one alternator

I'm guessing the grey is for the D+ (I've not check this goes to the light on the dash) but does that sound right?
Currently there's D+ and W terminals on the new alternator.

Take a look at this Zetor FAQ entry:

FAQ - Alternator, regulator and co - Zetor and ZTS

Alternator, regulator and Co Caution - never let the engine run with the ignition key removed or the battery disconnected. There is a risk that the diodes in the rectifier of the three-phase alternator will break and thus destroy the rectifier. Design and structure of an alternator on a Zetor...

zetorworld.com

Also where would I find the regulator if it's not been previously removed?

The new one is mounted there:


The original old one was mounted just betwen alternator/starter and your ignition/starting switch - if its not removed previously.
I think it was mounted above the starter on the Zetor 6911/6945, and in later models it was mounted in the cab below the dashboard.