No Fire

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nwfan1
10+ Years
10+ Years
Posts: 73
Joined: Tue Mar 01, 2005 3:42 pm
Zip Code: 14559
Circle of Safety: Y
Location: NY, Spencerport

No Fire

Postby nwfan1 » Thu May 07, 2020 7:12 pm

Here's what we have:
-'55 loboy
- Engine cranks, lights work
- No spark
- Ammeter shows no discharge when ignition is switched on
- Ignition switch ok (shows continuity when pulled out)
- Continuity from switch to neg side of coil
- Swapped known good coil, same result

Ideas?
Thanks!
'54 Standard Cub #185939
'55 Standard Cub #192323
'55 Loboy #732 with IH 1000 loader
'55 LoBoy #1937
"No holes in my hoods!"

Rodney51Cub
10+ Years
10+ Years
Posts: 441
Joined: Fri Feb 11, 2011 6:06 pm
Zip Code: 62995
Tractors Owned: 1951 Farmall Cub
1950 John Deere A
1950 Case VAI
1944 Farmall H
1943 Farmall H
1940 Farmall H
Circle of Safety: Y
Location: Southern Illinois

Re: No Fire

Postby Rodney51Cub » Thu May 07, 2020 7:25 pm

Check point gap and clean them.

Crimson Tim
5+ Years
5+ Years
Posts: 558
Joined: Wed Feb 19, 2014 1:09 pm
Zip Code: 32736
Tractors Owned: The crew:
"John", 1952 Cub
"Paul", 1951 Cub
"George", 1958 LoBoy Cub with Wagner 45 Loader
"Ringo", 1977 Cub

So far, Paul and Ringo have arrived. John and George were supposed to follow ages ago, but apparently have gone awol. Long story.
Circle of Safety: Y

Re: No Fire

Postby Crimson Tim » Thu May 07, 2020 9:24 pm

A voltage drop test will tell you more about the health of your wiring and connections than a continuity test. Check wiring connections, especially grounds. Clean and shiny?

What is known about the history of the tractor? When did it run last, and how did it run? Has anything changed since then?

Where are you checking for Spark? Is there any place upstream that has spark?
Which style ignition system do you have?

User avatar
Glen
5+ Years
5+ Years
Posts: 5115
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: No Fire

Postby Glen » Thu May 07, 2020 11:55 pm

Hi,
I would check the ignition points, like was said above.
They get old and burned from use.

They need flat, shiny surfaces to work best, so the engine will start, and run good.
If they are still useable, I take them out of the magneto, or Battery Ignition unit, and file them one at a time, with a large sharp file.
Set the point on a solid surface to file it.
Wipe off all filing with a clean cloth.

If the points look too burned, new points are better.
TM Tractor has new points and condenser, below is the listing, you can look at the pics.

http://www.tmtractor.com/new/el/367fp.htm

Below are pages showing the Battery Ignition unit, and the points. It shows setting the point gap also. :)

http://farmallcub.com/rudi_cub/www.clea ... age-11.jpg

http://farmallcub.com/rudi_cub/www.clea ... age-12.jpg

There is info in the 1957 LoBoy operator's manual also, and magneto info, if it has a magneto.
That manual is at the top of the page, at Cub Info, then go to Rudi's Manuals.

nwfan1
10+ Years
10+ Years
Posts: 73
Joined: Tue Mar 01, 2005 3:42 pm
Zip Code: 14559
Circle of Safety: Y
Location: NY, Spencerport

Re: No Fire

Postby nwfan1 » Fri May 08, 2020 9:05 am

Thanks for the direction. Checking voltage drops is a good idea, and I'll take a closer look at the points today.
'54 Standard Cub #185939
'55 Standard Cub #192323
'55 Loboy #732 with IH 1000 loader
'55 LoBoy #1937
"No holes in my hoods!"

nwfan1
10+ Years
10+ Years
Posts: 73
Joined: Tue Mar 01, 2005 3:42 pm
Zip Code: 14559
Circle of Safety: Y
Location: NY, Spencerport

Re: No Fire

Postby nwfan1 » Sat May 09, 2020 9:06 am

Points did the trick. A quick file and all is good. Something looked funny when I took the distributor off- took me a minute to realize the dust cover was missing. Have one on the way this morning.
Thanks again everyone.
'54 Standard Cub #185939
'55 Standard Cub #192323
'55 Loboy #732 with IH 1000 loader
'55 LoBoy #1937
"No holes in my hoods!"


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