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Tractor Talk Discussion Forum

ih 434 starting

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sa brown

04-18-2008 22:44:30




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i recently aquired a 1969 international 434 from my old dad, its been sitting outside unused for 2 years and the clock says 5700 houres,
hes been starting it with a sniff of ether since he got it and retired the fergie 35tvo, me and a friend managed to get it started with a large fresh battery and jump leads to his twin battery 4x4 and put it in the shed out of the weather,
it seems to run pretty sweet once its started, i had a ride round the field but dare not drop the rotorvator until its had a service of fluids and filters,
the heater plugs are not getting any power and they are open circuit,
im wondering if anybody knows if i can fit modern dual coil heaters if i machine thread adaptors or lathe out the old plug centers and tap to fit the new style plugs,
can it be done or is the old girl destined for its remaining life to have a taste for ether,
i can make any type of wiring harness but im a petrol head and dont know anything much about old diesel engines,
any tips or tricks from you tractor folk would be very much apreciated,

thanks.

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Rex in Australia

04-19-2008 14:50:37




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 Re: ih 434 starting in reply to sa brown, 04-18-2008 22:44:30  
G'day again.
Heater button is pressing the key inwards after turning the ignition on. Should be able to feel it go in, and if the ignition lights still work they dull very slightly when the glow comes on. Another thing i had to do was to pull the ignition switch apart and clean the contacts. (another story)
OK, power goes through the ignition switch, and up to the controller through heavy cables. As mentioned, worth pulling that controller right out and cleaning up the contacts, it is only a resistor coil so you can check if it is open circuit.
From the resistor, it goes to the rear glow plug, then through each one via the buz bars to the earth linkage at the front plug. There is a fair sized draw on the circuit so all contacts have to be very clean and tight.
Try removing all the buz bars, you should be able to see how they are not earthed through the glow plug as in other systems. it passes from the single contact in the middle to where the buz bar contacts and through to the next one. If they are wired any other way they can burn out.
You could remove them to test, or can test by touching a couple of leads across the contacts FOR A VERY SHORT TIME! But again, you will need two leads - one for the contact, one to the earth side. Just touch the contact and see if it sparks when contacted. If it does, that is good enough - not open circuit.
Charging? good luck, they have the old British system. (Don't forget it is positive earth.)

You can email me direct if you wish, I could send you some diagrams or something if it helps.
All the best, God Bless,
Rex

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sa brown

04-19-2008 17:42:40




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 Re: ih 434 starting in reply to Rex in Australia, 04-19-2008 14:50:37  
rex your a star, i dropped you an email, a wiring diagram would be a huge help in sorting the heaters and charging systems out,

thanks.



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Rex in Australia

04-19-2008 20:17:25




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 Re: ih 434 starting in reply to sa brown, 04-19-2008 17:42:40  
third party image

third party image

Sorry mate, email did not come through. I have jpegs of the wiring diagram, will try to put it up here.
God Bless,
Rex

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sa brown

04-19-2008 22:51:12




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 Re: ih 434 starting in reply to Rex in Australia, 04-19-2008 20:17:25  
rex thats brilliant, i see how its wired, that will make the job much easier, all the connections on the wiring harness look crook, i included my email addy if you would like to try sending the jpegs,

thanks again for your help and take care down under,
bob.

wa10@btinternet.com



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Rex in Australia

04-19-2008 00:33:29




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 Re: ih 434 starting in reply to sa brown, 04-18-2008 22:44:30  
Hi, I have one of these old girls and like it very much.
I had trouble starting it when I first got it. The glow plugs were not operating, it would start after a little bit of winding over, but as the weather got colder it was harder. I fixed the glow system and it starts first flick of the starter now.
You may know that these glow plugs are wired in series, and that they are powered in line with a "controller"?
Why not keep it the same? The glow plugs are not particularly expensive, and it is a fairly easy fix.
Just ensure that the controller is not open circuit. I thought mine was, but it was only a bad contact. Pull it all out and clean up the terminals. Ensure that the buz bars and all contacts are clean and tight, you would be amazed how easily it starts.
It is not good to continually use ether, look after this old tractor and it will serve you well.
All the best,
Rex

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sa brown

04-19-2008 02:06:48




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 Re: ih 434 starting in reply to Rex in Australia, 04-19-2008 00:33:29  
thanks for the reply rex, i dont have a wiring diagram for it yet, i find it amazing how little info there is in the way of service manuals/schematics for old tractors online other than people selling reprints of owners manuals and service manuals considering the wealth of info available on other subjects and the amount of people into restoring old tractors, i only got it inside yesterday evening so i have not had chance to look whats under the hood other than testing that the heaters have no power to them, if i can clean up the original wiring relays ect like you suggest i would much rather do that and keep it original but i have a feeling the farmer who owned it before my dad has been meddling with the wiring, the charging does not work either but im not sure if it just needs cleaning up and the generator polarising or if somethings burnt up that i cant see until i remove the hood.
i read on another forum about pressing a button for the heaters, the only button on there has power and its switching when pressed but nothing else happens, i will steamclean everything so i can see what im dealing with then start cleaning or resoldering every electrical connection i can find, i did notice a thin wire in the harness near the battery has been cut.


thanks again.

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