Ok, being a magnet guy, let me help with the rumors of lost magnetism.
Permanent magnets can lose magnetism.
Over Time, some magnetism is lost (usually insignificant to the design of the device)
Heat can discharge a magnet (but it takes a lot of heat). Typical ALNICO magnets keep their magnetism up to about 1000 degrees Fahrenheight
Impact can discharge a magnet. By repeated impacts to the magnet, the material demagnetizes.
A large impact can break the magnet into pieces causing multiple poles and a much lower performance. (This is the most likely cause of a magnet related issue)
A non-broken magnet can be re-energized using a capacitive discharge magnetizer. The magnet would have to be removed from its assembly and inserted into a coil and then a large DC current would be directed through the coil. You cannot "overcharge" a magnet. The magnet just saturates with as much magnetism as it can hold.
This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link: Privacy Policy
NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.
Weak Spark
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
-
- 10+ Years
- Posts: 2795
- Joined: Tue Jul 22, 2008 12:44 pm
- Zip Code: 48370
- Tractors Owned: 184
- Location: Oxford, MI
Re: Weak Spark
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
-
- 10+ Years
- Posts: 414
- Joined: Sun Jul 14, 2013 11:24 pm
- Zip Code: 04730
- Tractors Owned: 1950 Cub...so far
- Location: Houlton, Maine
Re: Weak Spark
Closest thread I see that has bearing on my issue of the day. I'm attempting to change the points and condenser in my distributor (never done this before) and I see the pinion gear lining up with the rotor. There are three screws holding a plate over the area I gather I have to access to get to the points. Is this correct? If so, how do I get the plate over the pinion gear? I'm not pulling on the pinion gear until someone here tells me to.
-
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: Weak Spark
I think you got your answer in another thread, but the pinion gear just pulls off. While there inspect the teeth of the pinion gear, if they are worn down to sharp points replace it also or it will eat up the teeth of the rotor.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
-
- 10+ Years
- Posts: 414
- Joined: Sun Jul 14, 2013 11:24 pm
- Zip Code: 04730
- Tractors Owned: 1950 Cub...so far
- Location: Houlton, Maine
Re: Weak Spark
John *.?-!.* cub owner wrote:I think you got your answer in another thread, but the pinion gear just pulls off. While there inspect the teeth of the pinion gear, if they are worn down to sharp points replace it also or it will eat up the teeth of the rotor.
They look good, John. I need you back in the other thread. And contrary to what some people say, things can get worse. I didn't know there were this many parts to a tractor.
-
- 10+ Years
- Posts: 414
- Joined: Sun Jul 14, 2013 11:24 pm
- Zip Code: 04730
- Tractors Owned: 1950 Cub...so far
- Location: Houlton, Maine
Re: Weak Spark
Rick Spivey wrote: the points in a magneto are gapped to .013", while a distributor is gapped to .020".
I don't understand this distinction. I have a magneto coil and what I call a distributor, or at least a distributor cap. What is the difference between the two? Pics would be great.
-
- Cub Pro
- Posts: 2779
- Joined: Sun Jul 01, 2007 10:07 pm
- Zip Code: 29518
- Circle of Safety: Y
- Location: SC, Cades 29518
Re: Weak Spark
Magneto, courtesy of TM Tractor. Note the square coil cover.
Distributor, also courtesy of TM Tractor. Note, no coil cover, because coil is external.
Both have to have a tower to distribute the spark. Due to the internal design, and how each controls "timing" of the spark, a magneto is gapped to 0.013", and a distributor to 0.020". If you have a magneto that has been "converted" (a kind word) to run from an external coil, you still should gap the points to 0.013", because the internal mechanisms have not been changed, just the spark source.
***Edited because I had the wrong number in the last statement. Thanks to Don McCombs for the correction!***
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
-
- Similar Topics
- Replies
- Views
- Last post
-
- 4
- 204
-
by AL Farmall Boy
Wed Mar 06, 2024 12:12 pm
-
- 22
- 666
-
by Glen
Wed Feb 07, 2024 7:45 pm
-
- 7
- 580
-
by Royalwulff24
Sun Dec 10, 2023 4:34 pm
-
- 2
- 526
-
by Bill V in Md
Tue Dec 12, 2023 7:35 am
-
- 9
- 301
-
by KETCHAM
Mon Mar 11, 2024 9:29 am
Who is online
Users browsing this forum: Glen and 1 guest