Re: 8n issues (6V, front mounted distributor)

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Posted by Tim Daley(MI) on May 16, 2020 at 10:01:54 [URL] [DELETE] :

In Reply to: 8n issues (6V, front mounted distributor) posted by Tony on May 16, 2020 at 08:27:56:

First, welcome aboard. Do you have the Essential Manuals? No? Invest in them. They are every bit as important as any wrench. #1 –Suspect a fuel issue, read more below. #2 -No, you don’t need 12V, why do you think that? Are you running an 8-Track Player? 6V works and runs fine, has for 100 years. 12V has its merits but I’ve never found a reason to convert. #3 – using a 12V battery source to jump with? Whatever, not doing it right. You can jump start a 6V by connecting to starter post then touching to ground see 75 Tips. No need to add any useless whistles and bells to the ‘circuit’. Do this: Set your VOM to DC VOLTS, place one probe on LH terminal post of ballast resistor, the single wire goes to the top of coil. Place other probe to metal ground. KEY ON but do not turn engine over. Reading should be battery voltage with points open, half that with points closed. #4 – A WOODS 600 mower is fine. ¾ Throttle is normal. Open full can mean loss of power due to worn engine. Mow in 2nd gear. #5 –there are aftermarket tachs and temp gauges but not really needed in my opinion. Many were and still are used without them. Save you money and spend on PM.

FUEL, SPARK, COMPRESSION are needed to run. First, check battery on a bench test machine, not simply charging. A starter shop or auto parts store will do it for free. A 6V battery does not mean it is wired correctly. From our HOW-TO’s forum, get the manuals and JMOR's WIRING PICTOGRAMS and verify wiring is correct. Check for spark per Bruce(VA)'s 75 Tips. Next, check fuel flow. One system at a time and do not start pulling off parts and replacing. Perform a true root cause problem solving method to determine if a part is defective. Spark test first before fuel test. You don't want any spilled gas around when you test for spark. Test for battery efficiency first. Pass? Move on. Fail? Get tested and replaced if defective. Next step is to spark test. Pass? Move on. Fail? Use a VOM to test wiring via continuity to coil and distributor. None? It's in the distributor. Next step, fuel flow test. Pass? You should be good. Fail? Fuel system needs troubleshooting from tank and sediment bulb to carb –see below.
Probable NO-GO fuel issue causes are: plugged vent, plugged screens, plugged sediment bulb, dirty gas tank, dirty carb, and more. There are three OEM screens in the fuel system. Two are on the Sediment Bulb Assembly; the 3rd is on the brass elbow inside the carb where the fuel line connects to. SEE PICTURES. I wouldn’t be shoving anything, wires especially, up into the sediment bulb assembly. You have a vertical fine mesh screen on the inlet port inside the tank that you can damage. Best solution is to remove the tank and thoroughly clean.

FORD N-SERIES TRACTOR FUEL SYSTEM & POSSIBLE CAUSES OF NO FUEL:






FORD 8N TRACTOR WIRING DIAGRAMS:
PRIOR TO S/N 8N-263844:




A float charger is needed, NOT a trickle charger, but a float charger, like the DELTRAN Battery Tender Jr. ® ™ . A battery charger, even a "trickle" charger, left unattended will eventually boil out a battery. Use a float charger for two reasons: battery longevity and a sure start. Battery sulfation occurs at a specific rate at "X" temperature. Over time, sulfation reduces battery performance and eventually its effects are irreversible. Sulfation of batteries starts when specific gravity falls below 1.225 or voltage measures less than 12.4 for a 12v battery, or 6.2 for a 6 volt battery. Sulfation hardens on the battery plates reducing and eventually destroying the ability of the battery to generate current. Using a float charger significantly reduces sulfation. Your battery loses 33 percent of its power when the temperature dips below freezing, and over 50 percent of its power when the temperature falls below zero. A fully charged battery will not freeze until -76°F; however, a fully discharged battery can start to freeze at 32°F. So……keep the battery fully charged! If you have a digital volt meter, 6.03 volts on a 6 volt battery and 12.06 volts on a 12 volt battery is only a 25% charge!

BATTERY TENDER JR (6V) BY DELTRAN:



FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:


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