Posted by davidroller on October 01, 2022 at 18:54:02 from (68.45.142.231):
Hello, I just purchased this tractor and I would appreciate any assistance on the 3 issues I have on this tractor. Probably all related.
Tractor runs on ( diesels ), when key is turned off. ( PROBLEM # 1 )
* I believe it to be electrical. I have adjusted timing both advanced and retarded with no change to the problem. So set properly
* new factory dash harness installed. These function as they should ( lights, dash lights, fuel gauge, temp gauge, oil light )
* Has a one wire alternator ( only wire on it was connected from ALTERNATOR BATT to BATTERY wire ) GEN light bulb removed
* I assumed this was the issue, so I connected alternator output #2 ( side plug ) to alternator BATT output with the wire to BATT
* I then ran the alternator output #1 ( side plug ) to one side of GEN light, other side connected to IGNITION on Fuel/Temp gauge
* diode was installed on this output #1 wire
* GEN light now works properly, but will not shut of with KEY switch ( PROBLEM # 2 )
* when output wire #1 totally disconnect, GEN light is obviously dead, but no effect on problem ( run on / dieseling )
* When engine running, system is charging at 14.4 vdc
* All other wiring is I believe factory
* When the key is turned off, starting button voltage drops to 2.4 - 3.5 vdc ( best my Fluke meter can read ) engine knocks / sputters
* I feel like I have not isolated the feedback voltage
NOTE - If engine is cold ( started cold and ran for just a few minutes, before water temp comes up ) it shuts right off ???
PROBLEM # 3 - when lights are turned on, they all work, pulling around 5.5 - 6.8 amps ( read with Fluke clamp on meter ), but the resistor on the light switch gets very hot. Smoked some at first as it burnt off factory coating. ( purchased as a direct IH part from Steiner ). IS THIS NORMAL ?
* Additionally, the input BATTERY amperage to the light switch reads NEGATIVE amps??? LIGHT wires read POSITIVE amps on same Clamp on Fluke meter.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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