If a starter use permanent magnets it will spin backward with negative voltage. If it use winding in the stator it will spin the same way regardless of the polarity
Correct. I have a Case starter that has coils for the stator and the polarity doesn't matter. However, the brushes have two different positions where you may reverse the direction of rotation by clocking the brush cage by 90⁰.
@@JosephCowen-fz8vj We had farm equipment that ran a 10hp b&s hooked to a motor/generator and battery for starting. Dc winch motor is a good example of a permanent magnet motor that runs either way by changing polarity with relays or solenoids
@@JosephCowen-fz8vjit depends on the type of DC motor and how it’s wired. A permanent magnet motor reverses with supply polarity but a universal DC motor does not. If the power feeding a universal motor is reversed, both the field and armature coils reverse causing the motor to continue to run in the same direction. They’re called “universal” because they can run on both AC and DC.
Not only that a six volt starter will work on 12 volts as long as you don't crank on it for a long time. If you are having issues getting it running just feel the starter now and again to make sure it's not getting too hot while you are working on it.
Generators will lose their residual magnetism, and you have to flash them. Yes, DC generators can indeed lose their magnetism if the polarity is reversed or incorrect connections are made. Here's what can happen: 1. Reversed polarity: If the positive and negative terminals of the generator are swapped, the magnetic field can become demagnetized or even magnetized in the opposite direction. 2. Incorrect connections: If the generator's field coils are connected incorrectly, it can cause the magnetic field to collapse or become severely weakened. 3. Armature reaction: If the armature (the rotating coil) is connected with the wrong polarity, it can create an opposing magnetic field that cancels out the main magnetic field, leading to a loss of magnetism. When this happens, the generator may experience a range of issues, including: - Reduced output voltage - Erratic operation - Complete failure to generate electricity - Permanent damage to the generator's magnetic components So, it's crucial to ensure correct connections and polarity when working with DC generators to avoid magnetism loss and potential damage. Flashing is a process that remedies magnetism loss in DC generators by re-magnetizing the generator's magnetic field. Here's how it works: 1. Flashing involves briefly connecting a DC voltage source (like a battery) across the generator's field coils. 2. This sudden surge of voltage creates a strong magnetic field that re-magnetizes the generator's magnetic components. 3. The brief flash of voltage restores the original magnetic polarity and strength, effectively "rebooting" the generator's magnetic field. Flashing can help: - Re-establish the original magnetic field strength - Correct reversed polarity or demagnetization issues - Restore the generator's ability to produce the desired output voltage Additionally, flashing may not always be successful, especially if the generator has suffered physical damage or severe demagnetization. In such cases, replacement of the magnetic components or the entire generator may be necessary. But if you feel comfortable using the term polarity by all means.. Flashing an AC generator is a bit different from flashing a DC generator. AC generators have a rotating magnetic field, so the flashing process is designed to re-establish the magnetic field and synchronize it with the rotor. Here's a general outline of the flashing process for an AC generator: 1. Disconnect the generator from the load and ensure it's isolated. 2. Identify the exciter circuit (usually a separate winding or a pilot generator). 3. Connect a DC voltage source (like a battery or a flashing device) across the exciter circuit. 4. Apply a brief, high-voltage surge (typically 1-5 seconds) to the exciter circuit. This creates a strong magnetic field that re-magnetizes the rotor and synchronizes it with the stator. 5. Remove the DC voltage source and reconnect the generator to the load.
Setting it up backwards ruined the residual magnetism in the generator that is required for it to function. You used to have to do this on old air cooled VW generators.
@@dunk5647yeah, I remember that there was a procedure where you had to use a wire and touch one of the terminals to the battery for like two seconds, and it would work. Believe it or not, there's actually another thing you can do where you wire an old corded drill and manually twist the chuck a couple of times. I watched a guy do that with a generator that wasn't producing power, and it worked.
You may have to set the polarity on the generator. You take 1 wire loose and tap it against a different terminal. Sorry, it’s been too long to tell you which wire or terminal. Check an old Motors Manual.
Positive batt to field coil sets polarity, or neg if it’s true pos ground. Called polarizing the generator, or “ flashing”. Must be done whenever it’s disconnected. If the gen is already toasted it won’t help though.
I experienced this with my to20 furgeson. Got the kit to convert it to 12 volt negative ground, didnt have to change out the starter. It was 6 volt positive geound. Starter still works just fine :)
My JD 520 generator puked at my tractor show. I didnt want to do alternator conversion but decided to do it. I sed to boost my tractor just about everytime getting out of barn for the day. Now like 3 years later i haven't boosted battery once and i used it to jump a temperamental bobcat. Havent looked back other than would like to make a better bracket. Gen was pos ground alts are neg ground. I did a kit 6v pos ground to 12v neg ground without replacing starter😊
Had two push lawn mowers they were identical i was just rope starting till one day tried to start with battery hooked up direct they would not turn over unless i hooked it up to positive ground.
The old guys were smart. Just positively charging the body prevents rusting. Its science. Austin Healy used it back in the day and lexus done this till the early 2000's.
Switch to neg ground, add a 12v alternator get a starter for a diesel ford 900 series, they are 12v neg ground. Switch to a 12v ignition coil with ballast resistor or you’ll burn up the ignition points.
The generator is alone thing that needs to be positive ground. Most generators don't work anyways on old tractors. Best to change it to a 12volt system and alternator
Battery explosion in my 66 Chevy Van while trying to jump start my 63 MGB (Positive Ground) Friend hooking up the cables moved faster than the battery parts!
My classic 62 was positive ground..i changed it to positive to use a radio..So if you charge the field winding of the generator opposite it will make the generator work with negative ground. All you do is connect the field winding to batter for a few seconds it will reverse the magnetic field... The requilator does not Care it works off solenoids too.
IIRC Ford finally gave up on positive ground around the early-mid 50s, and other than a few system changes need prior to hooking up a battery the technology of the day handled it extremely well.... FWIW, the Model T transmission is essentially the mechanics of an automatic transmission the bands are just manually operated....
Some old solar arrays are positive grounded. Some are both (bi polar), postive ground one side, negative on the other. So you get a line to line voltage and a "center tap" voltage, like a transformer for a house.
Most DC starter motors use permanent magnets and will spin backwards if you reverse polarity. A positive ground system means that the positive battery terminal is connected to the frame as the common "ground", as opposed to the more commonly used negative ground system, so on a positive ground system, the positive lead on the starter is still connected to the positive battery terminal.
Those positive ground systems were also 6v so if the same person that hooked it up backwards used a 12v battery that's probably why the genny in burned up. The sarter can handle the extra voltage, other components especially lights and ballast resistor, cannot
Generators don't brake very often. They are made like a starter. Take it apart .clean it. Brush the copper plates. Clean the copper out between the plates. New brushes. new bushings. Some times just cleaning out the copper dust works.
Commutator and brushes change AC to DC in a generator armature. . DC to AC in a starter armature. Alternator is DC in rotor. AC in stator. Diodes convert 3 phase AC to pulsating DC.
We had a Case pulll plow at work and somebody hooked the battery up backwards and nobody noticed and couldn't get it to start. You would think it would have shorted something out. But instead it made the starter. Rotate in the opposite direction. 😂
This cost me a job. I didn't look at the battery when I went to charge it and made an assumption based on how it was hooked up... imagine how that went. (Also the battery was covered in dirt).
I'm surprised that the starter relay can withstand having the Ign terminal grounded. It must've "smoked" internally during the first crank after installation.
Not all starters are the same. You can get some and hook it up right red on positive and black on negative and turned it the key and they will spin in the wrong direction. Which is fine but it will not engage the motor. They have to be hooked up right. I had a generator starter on an old wheel horse. I had at rebuilt by a starter generator rebuild shop. Went back to get it after it got rewired. The dam thing wouldn't turn the motor over. They tried to tell me it was just a generator motor so I proved to them it was a generator/ starter motor. One field was much bigger than the other field thus it was a starter.
Wait till you run into an original 24 volt battery system out of 60’s era John Deere diesels. 1 battery is positive ground. 1 negative ground. Or the first years of the 4010 and 4020
Had a pld ford 3/4 ton that the boss had installed backwards.....he asked why it wouldn't start and I admittedly stared at the engine for a minute. Couldn't figure it out so I decided to start from the beginning by removing the battery, that's when noticed. The engine was turning backwards! Something you don't expect to see...🤔
Some starters are and some starters aren't. Just like any electric motor. All of them have the capability to run backwards, but that doesn't mean they were designed to run backwards. It's really hard on the brushes if they weren't designed for it. Solenoids on the other hand, are going to fry really quick.
I worked on a few antique tractors that positive ground and the instruments on the dash were also that way the gentleman didn't know that and was complaining about Sparks and melting wiring when you wired it up the other way when was changing the dash deirdre's one at a time as he add no idea
I found this out by getting the starter wiring wrong on an abrams tank. It worked fine when i did the ground hop but when i put the pack in the hull i couldn't get the connectors to mate up on the disconnect panel. Turned out I'd done this
@@markallen4364Just wanted to mention that the preferred "old GM" alternator is a Delco model 10SI. Get the lowest amp rating you can find and certainly not higher than 60amps. Those old tractors did not use shunt resistors to feed the ammeter so ALL the amps going between the alternator and battery are going through the ammeter. Most of the ammeters on old tractors (at least all that I've seen) use a meter with the maximum readable scale of 30 amps in either direction. If you have a serious draw from the battery side of the circuit the alternator will supply as many amps as it can to satisfy the draw. Any amount over 30amps will exceed the meters ability to tolerate for any length of time, and the wiring isn't going to take much of it either. A 60 amp 10SI (which are extremely common, and probably the least expensive option-even cheaper than a 30amp version) should be ok for normal operation but keep an eye on that ammeter to make sure it's not pegged one way or the other. If it is, whatever you're welding out there is also ruining your ammeter and circuit wiring. ;) I'm just mentioning it because there are people out there that will assume a 90-120 amp 12SI from the 1980's, or a 130+ amp CS130 from the 1990's is an "old GM alternator" when they are actually welders when compared to a 30 amp 10SI. I think there is one or more builders that still make 30amp 10SI's specifically for old tractor alternator conversion applications. I'm an old guy and the older I get, the more I realize how "new" stuff is that young people say is "old" lol.
Ask someone who is replacing an AC compressor and had to remove the alternator and accidentally hook the wires up backwards I can certainly vouch that a starter does not care what polarity it is but if you do hook it up backwards it'll grounds to the case
DC generator field MUST be FLASHed to establish its polarity or upon the application of power it will run backwards thereby frying the fan belt. Ask me how I know....
Isn't it great to own machinery that you can work on yourself? You so much as take a shroud off a new tractor the factory will send you a cease and desist email.
If it was backwards the generation is burned up. Probably why it was sold. The GM (generic motors) 1 wire self regulating alternator will be awsome. 45amp min.
@@richwood8650if your starter don't has permanent magnets it will always turn in one direction, unlike you switch the 2 cables which are connected to the carbon brushes. If you have a corded drill and you switch directions the switch does exactly this
@@simonm1447 The outboard motor I'm referring to was an old Kiekhaefer Mercury and the starter motor actually had two drives. One for forward, one for reverse. I'm not challenging anyone's knowledge. Simply looking for explanation. I initially asked this of @ queernmental who stated the starter would only ever spin in one direction.
If a starter use permanent magnets it will spin backward with negative voltage.
If it use winding in the stator it will spin the same way regardless of the polarity
YUP I hooked the battery in my mower backwards once and the starter spun backward
Correct. I have a Case starter that has coils for the stator and the polarity doesn't matter. However, the brushes have two different positions where you may reverse the direction of rotation by clocking the brush cage by 90⁰.
Not true , DC motors turn either way dependant on voltage polarity , and in fact a DC motor if turned by an outside force will turn into a generator !
@@JosephCowen-fz8vj
We had farm equipment that ran a 10hp b&s hooked to a motor/generator and battery for starting.
Dc winch motor is a good example of a permanent magnet motor that runs either way by changing polarity with relays or solenoids
@@JosephCowen-fz8vjit depends on the type of DC motor and how it’s wired. A permanent magnet motor reverses with supply polarity but a universal DC motor does not. If the power feeding a universal motor is reversed, both the field and armature coils reverse causing the motor to continue to run in the same direction. They’re called “universal” because they can run on both AC and DC.
Not only that a six volt starter will work on 12 volts as long as you don't crank on it for a long time. If you are having issues getting it running just feel the starter now and again to make sure it's not getting too hot while you are working on it.
Yeah I converted my 67 beetle to 12 volt by just swapping out the battery to a 12 volt one I miss the older days
Same goes for 12v starters on 24v
Only way i can start my 42 Cadillac
Generators will lose their residual magnetism, and you have to flash them.
Yes, DC generators can indeed lose their magnetism if the polarity is reversed or incorrect connections are made. Here's what can happen:
1. Reversed polarity: If the positive and negative terminals of the generator are swapped, the magnetic field can become demagnetized or even magnetized in the opposite direction.
2. Incorrect connections: If the generator's field coils are connected incorrectly, it can cause the magnetic field to collapse or become severely weakened.
3. Armature reaction: If the armature (the rotating coil) is connected with the wrong polarity, it can create an opposing magnetic field that cancels out the main magnetic field, leading to a loss of magnetism.
When this happens, the generator may experience a range of issues, including:
- Reduced output voltage
- Erratic operation
- Complete failure to generate electricity
- Permanent damage to the generator's magnetic components
So, it's crucial to ensure correct connections and polarity when working with DC generators to avoid magnetism loss and potential damage.
Flashing is a process that remedies magnetism loss in DC generators by re-magnetizing the generator's magnetic field. Here's how it works:
1. Flashing involves briefly connecting a DC voltage source (like a battery) across the generator's field coils.
2. This sudden surge of voltage creates a strong magnetic field that re-magnetizes the generator's magnetic components.
3. The brief flash of voltage restores the original magnetic polarity and strength, effectively "rebooting" the generator's magnetic field.
Flashing can help:
- Re-establish the original magnetic field strength
- Correct reversed polarity or demagnetization issues
- Restore the generator's ability to produce the desired output voltage
Additionally, flashing may not always be successful, especially if the generator has suffered physical damage or severe demagnetization. In such cases, replacement of the magnetic components or the entire generator may be necessary.
But if you feel comfortable using the term polarity by all means..
Flashing an AC generator is a bit different from flashing a DC generator. AC generators have a rotating magnetic field, so the flashing process is designed to re-establish the magnetic field and synchronize it with the rotor. Here's a general outline of the flashing process for an AC generator:
1. Disconnect the generator from the load and ensure it's isolated.
2. Identify the exciter circuit (usually a separate winding or a pilot generator).
3. Connect a DC voltage source (like a battery or a flashing device) across the exciter circuit.
4. Apply a brief, high-voltage surge (typically 1-5 seconds) to the exciter circuit. This creates a strong magnetic field that re-magnetizes the rotor and synchronizes it with the stator.
5. Remove the DC voltage source and reconnect the generator to the load.
Flash them??
@@krakrtreacysr907 remagnetize the permanent magnets
Scratch a hot wire on the armature post. Kinda like striking a match.
On the generator I mean.
@@porcupinepunch6893oh ok interesting... Thanks
Setting it up backwards ruined the residual magnetism in the generator that is required for it to function. You used to have to do this on old air cooled VW generators.
or it cockt the diods in the regulator som old regulators cant handel swiching polarity
Sometimes you can switch the polarity and can reset it. Old harley generators are like that ...
@@dunk5647yeah, I remember that there was a procedure where you had to use a wire and touch one of the terminals to the battery for like two seconds, and it would work.
Believe it or not, there's actually another thing you can do where you wire an old corded drill and manually twist the chuck a couple of times. I watched a guy do that with a generator that wasn't producing power, and it worked.
So that may explain why my generator does nothing. The wires are hooked up backwards
You may have to set the polarity on the generator. You take 1 wire loose and tap it against a different terminal. Sorry, it’s been too long to tell you which wire or terminal. Check an old Motors Manual.
You can also look up videos on the same thing for vw generators...
Positive batt to field coil sets polarity, or neg if it’s true pos ground. Called polarizing the generator, or “ flashing”. Must be done whenever it’s disconnected. If the gen is already toasted it won’t help though.
Replace that generator with a 1wire gm alternator.just finished one on a ford 5000 tractor.worked great
I put a Delco 10SI on my dad's old Ford tractor.
Actually there's a Rule of Motors that the windings are wound a certain direction called the Left hand rule. Generators are Right hand rule.( Fleming)
I experienced this with my to20 furgeson. Got the kit to convert it to 12 volt negative ground, didnt have to change out the starter. It was 6 volt positive geound. Starter still works just fine :)
The old Alice-Chalmers tractors were positive ground. There was a W-9 on our place for years.
Polarize the generator and it'll probably start working.
+ to armature terminal, flash the field terminal to ground.
Generators have to b polarized at the regulator to flow in the correct direction
My JD 520 generator puked at my tractor show. I didnt want to do alternator conversion but decided to do it. I sed to boost my tractor just about everytime getting out of barn for the day. Now like 3 years later i haven't boosted battery once and i used it to jump a temperamental bobcat. Havent looked back other than would like to make a better bracket. Gen was pos ground alts are neg ground. I did a kit 6v pos ground to 12v neg ground without replacing starter😊
Had two push lawn mowers they were identical i was just rope starting till one day tried to start with battery hooked up direct they would not turn over unless i hooked it up to positive ground.
The old guys were smart. Just positively charging the body prevents rusting. Its science. Austin Healy used it back in the day and lexus done this till the early 2000's.
Switch to neg ground, add a 12v alternator get a starter for a diesel ford 900 series, they are 12v neg ground. Switch to a 12v ignition coil with ballast resistor or you’ll burn up the ignition points.
You need to reset the field on the generator.
The generator is alone thing that needs to be positive ground. Most generators don't work anyways on old tractors. Best to change it to a 12volt system and alternator
Only wound field DC motors are not polarity sensitive. Permanent magnet DC motors are however.
Learned that when I swithched a 6 volt Ford NAA to positive ground and an alternator.
Battery explosion in my 66 Chevy Van while trying to jump start my 63 MGB (Positive Ground) Friend hooking up the cables moved faster than the battery parts!
Generators will also work as a motor. A lot of the old stuff is very flexible. Alternators can also put out 110v with a little regulator hack.
My classic 62 was positive ground..i changed it to positive to use a radio..So if you charge the field winding of the generator opposite it will make the generator work with negative ground. All you do is connect the field winding to batter for a few seconds it will reverse the magnetic field... The requilator does not Care it works off solenoids too.
Positive ground on MOTEL T also
IIRC Ford finally gave up on positive ground around the early-mid 50s, and other than a few system changes need prior to hooking up a battery the technology of the day handled it extremely well....
FWIW, the Model T transmission is essentially the mechanics of an automatic transmission the bands are just manually operated....
If you have a Amp gauge, it will read backwards if polarity is wrong
Most generators are hooked up with a positive ground, check coil if positive goes to distributor then it needs to be positive ground
Making a small assumption here but I would be safe betting this is a diesel.... no coil, no distributor, and no need for power after starter fires....
Some old solar arrays are positive grounded. Some are both (bi polar), postive ground one side, negative on the other. So you get a line to line voltage and a "center tap" voltage, like a transformer for a house.
Most DC starter motors use permanent magnets and will spin backwards if you reverse polarity. A positive ground system means that the positive battery terminal is connected to the frame as the common "ground", as opposed to the more commonly used negative ground system, so on a positive ground system, the positive lead on the starter is still connected to the positive battery terminal.
Series wound. The field and armature both reverse when polarity is reversed, cancelling out.
The starter does not mater. But the coil does!!! The regulator & generator does!!!
My grandfather had that same tractor in East Texas! Thing ran forever
Those positive ground systems were also 6v so if the same person that hooked it up backwards used a 12v battery that's probably why the genny in burned up. The sarter can handle the extra voltage, other components especially lights and ballast resistor, cannot
In ford ,6 volt was positive ground,when they changed to 12 volt it was negative ground,and yes you will have charging problem
Is there a mini bus in the background it kinda reminds me of the barn burner from twister
Generators don't brake very often. They are made like a starter. Take it apart .clean it. Brush the copper plates. Clean the copper out between the plates. New brushes. new bushings. Some times just cleaning out the copper dust works.
Commutator and brushes change AC to DC in a generator armature. . DC to AC in a starter armature. Alternator is DC in rotor. AC in stator. Diodes convert 3 phase AC to pulsating DC.
I did NOT know this, thanks for the tid bit!!👍👊
We had a Case pulll plow at work and somebody hooked the battery up backwards and nobody noticed and couldn't get it to start. You would think it would have shorted something out. But instead it made the starter. Rotate in the opposite direction. 😂
Field winding is in series with the armature. Reverse the polarity and it's like a double reverse,.
My 1940 ford is positive ground and it does mater as we had wiring catch fire in the entice ground position
I found it out too and now I have a new alternator in my tracktor!
My ‘94 starter relay is not hooked up right. I can’t find the right way to do it either. Still works though 🤣🤣
Ole ford 443. We own one unbelievably bullet proof. Great purchase
Hook it up negative ground and you can put a modern style alternator on it.
As a diesel mechanic thank you
This cost me a job. I didn't look at the battery when I went to charge it and made an assumption based on how it was hooked up... imagine how that went. (Also the battery was covered in dirt).
I will never understand why so many folks pronounce solenoid as "sill-a-noid."
Most circuits don't care if you have the ground on positive or negative. It's just a return line.
More and more circuits do care.
Hooking it up backwards burns out your regulator
I'm surprised that the starter relay can withstand having the Ign terminal grounded. It must've "smoked" internally during the first crank after installation.
Wouldn't they spin backwards
Not all starters are the same. You can get some and hook it up right red on positive and black on negative and turned it the key and they will spin in the wrong direction. Which is fine but it will not engage the motor. They have to be hooked up right. I had a generator starter on an old wheel horse. I had at rebuilt by a starter generator rebuild shop. Went back to get it after it got rewired. The dam thing wouldn't turn the motor over. They tried to tell me it was just a generator motor so I proved to them it was a generator/ starter motor. One field was much bigger than the other field thus it was a starter.
You can use one of the welder generators on that bad buy. Stick weld ½"
Wait till you run into an original 24 volt battery system out of 60’s era John Deere diesels. 1 battery is positive ground. 1 negative ground. Or the first years of the 4010 and 4020
Had a pld ford 3/4 ton that the boss had installed backwards.....he asked why it wouldn't start and I admittedly stared at the engine for a minute.
Couldn't figure it out so I decided to start from the beginning by removing the battery, that's when noticed.
The engine was turning backwards!
Something you don't expect to see...🤔
Wrong starter?
Some starters are and some starters aren't. Just like any electric motor. All of them have the capability to run backwards, but that doesn't mean they were designed to run backwards. It's really hard on the brushes if they weren't designed for it. Solenoids on the other hand, are going to fry really quick.
But the solenoid that actuates the drive on anything but Ford will not engage the starter
I worked on a few antique tractors that positive ground and the instruments on the dash were also that way the gentleman didn't know that and was complaining about Sparks and melting wiring when you wired it up the other way when was changing the dash deirdre's one at a time as he add no idea
Yes only with the old 6v battry it was ground positive before
I found this out by getting the starter wiring wrong on an abrams tank. It worked fine when i did the ground hop but when i put the pack in the hull i couldn't get the connectors to mate up on the disconnect panel. Turned out I'd done this
You know why else are generator doesn't work because it's a 6-volt generator not 12 volt.
The diesels (172ci) came with 12v batteries and generators (at least according to the service manual)
@@AustinCoulson if it was positive ground it was a 6-volt turned into 12-volt.
@@AustinCoulson another thing just get a regular old GM alternator their internally regulated they worked better than them generators do
@@markallen4364Just wanted to mention that the preferred "old GM" alternator is a Delco model 10SI. Get the lowest amp rating you can find and certainly not higher than 60amps. Those old tractors did not use shunt resistors to feed the ammeter so ALL the amps going between the alternator and battery are going through the ammeter. Most of the ammeters on old tractors (at least all that I've seen) use a meter with the maximum readable scale of 30 amps in either direction. If you have a serious draw from the battery side of the circuit the alternator will supply as many amps as it can to satisfy the draw. Any amount over 30amps will exceed the meters ability to tolerate for any length of time, and the wiring isn't going to take much of it either.
A 60 amp 10SI (which are extremely common, and probably the least expensive option-even cheaper than a 30amp version) should be ok for normal operation but keep an eye on that ammeter to make sure it's not pegged one way or the other. If it is, whatever you're welding out there is also ruining your ammeter and circuit wiring. ;)
I'm just mentioning it because there are people out there that will assume a 90-120 amp 12SI from the 1980's, or a 130+ amp CS130 from the 1990's is an "old GM alternator" when they are actually welders when compared to a 30 amp 10SI. I think there is one or more builders that still make 30amp 10SI's specifically for old tractor alternator conversion applications.
I'm an old guy and the older I get, the more I realize how "new" stuff is that young people say is "old" lol.
Just have to repolarize the generator and it should start working again. Might have to replace the voltage regulator depending on what type it is
8n with 12v neg ground. I run it with the solenoid flipped. It doesn't really matter though
I did not know that !!! THANKS !!
In before someone spins a starter motor backwards or fries any diodes or magnets.
You are correct. I definitely didn't know that
I do know. The solenoid will engage, but the, starter motor will run in reverse. As will your diesel when cranking in reverse. So now you know.
My starter motor spins the same way whether its negative ground or positive ground. That was the whole point of the video
Gavin reminds me of Clutch Cargo!
That there is a somewhat rare beast, 1801 industrial.
Polarity Sencecivity is a big problem I'm America apparently 😅
I'm offended 😅
I think you meant to say that the gauges are analog, not mechanical. Except for the temperature, and oil pressure gauge possibly.
Yeah the old generator was still positive ground !
That cant be right. Isn't it just a brushed dc motor like any other starter? I you reverse polarity, it will go backwards..
Am I missing something?
Honestly, thanks for letting me know 😮
Ask someone who is replacing an AC compressor and had to remove the alternator and accidentally hook the wires up backwards I can certainly vouch that a starter does not care what polarity it is but if you do hook it up backwards it'll grounds to the case
Look at the brushes on the generator… there are no magnets in the gen so no need to “reset “ the field…
Most starters are definitely polarity sensitive. It goes the same with all electric motors. If you hook it up in reverse it spins in reverse.
Gavin is so good looking, but what's with his mouth!?!?
you mean his money maker?
Reversing the polarity will damage the voltage regulator.
DC generator field MUST be FLASHed to establish its polarity or upon the application of power it will run backwards thereby frying the fan belt. Ask me how I know....
It happened on our 8n they is exactly why it’s not charging
Those old generators shit out
Generators are polarity set based on the system…that tractor in not old enough to be a pos. ground…
Comment section is taking care of it for me.
My riding lawnmowers starter is deffo polarized
Yeah because he hooked it up incorrectly he blew out the zener diode in the alternator. You can replace the diode or you can buy another alternator.
Isn't it great to own machinery that you can work on yourself? You so much as take a shroud off a new tractor the factory will send you a cease and desist email.
If it was backwards the generation is burned up. Probably why it was sold. The GM (generic motors) 1 wire self regulating alternator will be awsome. 45amp min.
Congrats in figuring out how a coil works
DC motors spin the opposite direction when you change polarity
So the starter drive ( bendix ) will work both directions?
The starter will only ever turn one way
I ask because some old two strokes would start and run in both directions. Reverse polarity would spin the starter backwards.
@@richwood8650if your starter don't has permanent magnets it will always turn in one direction, unlike you switch the 2 cables which are connected to the carbon brushes.
If you have a corded drill and you switch directions the switch does exactly this
@@simonm1447 if it's a reversible drill, explain how that works. All of mine are, whether AC or DC.
@@simonm1447
The outboard motor I'm referring to was an old Kiekhaefer Mercury and the starter motor actually had two drives. One for forward, one for reverse. I'm not challenging anyone's knowledge. Simply looking for explanation.
I initially asked this of @ queernmental who stated the starter would only ever spin in one direction.
I didn't know that, now i do. The more you know 🌈
I didn't even know Ford made tractors
Old trucks used to be the same.
It's not sensitive but will run backwards unless you sap it internally. You may be running the engine backwards! Lol
Ur generator needs to be polarized by useing a jump wire from battery its like n old vw
I found this out by accident and i was mind blown
That’s not true for all starters. Many outboard motors WILL run backwards and will not kick out the abendix
Yeah my tachometer is messed up because my mechanic hooked up the started backwords and the gauge went the other way. Don’t do this
The generator needs to be flashed
My car is burning down on the freeway because you told me this. Thanks for putting me out of my $29k car because you lied about this
Start it my friend.
The generator has to be polarized. It may work.