Anonymous-0
Well-known Member
i plan to install a delco alternator on my 2010 JD. Its from a pontiac so i need to change the pully for the v belt. Is there a pully made for this?
- Thread starter Anonymous-0
- Start date
Any standard V-belt pully should work as long as it is the same size belt as your tractor. The delco alternators have a standard shaft size. Sometimes they need a different spacer behind the pully than the serpentine pulleys. The NAPA I work at has a box of em out back that came off cores and such. I would go to your local NAPA and ask em what they have.
old
Well-known Member
- Location
- Camdenton Missouri
A lot of times you can take the pulley off the generator that was on it and put it on the alternator. I can not say for sure you can do that with the one you have but you might be able to
whizkidkyus
Member
- Location
- South Central , Ky.
Any V belt pulley will work as long as it is designed to fit on the shaft of your alternator . The main concern is that the alternator is turning in the direction that it's supposed to turn in order to work . In other words , if the alternator has to turn clockwise in order to work and the engine is turning counterclockwise then you will have a problem . I'm no expert on the way alternators have to turn nor am I on how engines turn, so I don't know if this will be a problem in your case or not . Another problem is that you need to get the same diameter pulley as what was originally on the alternator as that was what it was designed for in order to produce the correct voltage .
Whizkid
Whizkid
whizkidkyus
Member
- Location
- South Central , Ky.
Also , you need to make sure that the alternator pulley and the engine pulley that the belt(s)come off of line up correctly or straight and not at an angle . Also , be sure to make sure that the alternator belt is not over tight or too lose .
Whizkid
Whizkid
Whizzy, 'Most ALL alternators will happily charge rotating in either direction. The only downside is the possibility of the pulley unscrewing the nut on those alternators tht son't have a keyed pulley.
HOW did you come up with the notion they are rotation-sensitve as far as charging?
HOW did you come up with the notion they are rotation-sensitve as far as charging?
Generally with tractor applications you want a smaller pulley because tractors run at a much lower rpm then a car. An alternator will produce the same voltage at different rpms, what actually varies is how much amperage the alternator will produce at a given rpm. With a tractor that just needs the battery(s) maintained and a few lights run, the pulley size doesn't need to be to exact just as long as it is spinning close to the desired rpms.
A delco alternator can be run the opposite way as what it is intended for and still work, however if too much load is put on it running backwards it can possibly overheat. again, with a tractor that just needs the battery maintained and maybe lights every once in a while it would be fine.
A delco alternator can be run the opposite way as what it is intended for and still work, however if too much load is put on it running backwards it can possibly overheat. again, with a tractor that just needs the battery maintained and maybe lights every once in a while it would be fine.
Anonymous-0
Well-known Member
Unless someone here has knowledge you might consider having one made. As the belts used in the automotive and the industrial applications can differ. The v groove can be of different width or profile causing belt life and performance to suffer if mismatched. The RPM range can also be a consideration.
I would imagine most users don't give it much thought.
I would imagine most users don't give it much thought.
There is a special regulator made for the Delco regulators different from the standard SE (self exciting) type. It is a AC regulator (D10AC) i believe is its designation. It uses AC from the stator to trigger DC from the input post to the rotor and the result is that it starts charging IMMEDIATELY at very low rpm. I have that regulator in my 830 Case alt. and it has worked great. For you guys with a better understanding, you remove the diode trio and lay it aside, add the new regulator and a couple small wires (supplied) internally. This is the answer for those low rpm tractors that a standard SE regulator will not energize till high rpms. It charges from an extremely low rpm. If interested you may research it online or go to a knowledgable independant rebuilder and ask him. mEl
Paul Janke
Member
If you want to run the alternator the opposite direction, get a fan for it from a Corvair. They ran the alternator the opposite direction.
old
Well-known Member
- Location
- Camdenton Missouri
I have found a few that would not work but those are the ones that screw onto the armature instead of being bolted to then armature but those are the only ones I have found that you can not use. Some times you do need to use washers extra as extra spacers between the house and pulley but other then that most wlll work out fine
If you alternator is from a serpentine drive car (flat-ribbed-belt), it's likely a CS Delco series and not a SI. Correct? If so, info for it is a bit different then often posted here - since most people putting Delco alternators on tractors are using Delco 10SIs or 12SIs, not CS units.
The pulley from the 2010 generator will fit fine on the 10SI or 12SI alternators. For a CS series, you might have to buy a new pulley -available in many places.
The pulley from the 2010 generator will fit fine on the 10SI or 12SI alternators. For a CS series, you might have to buy a new pulley -available in many places.
To be technical, when alternators are installed on tractors from the factory, they tend to have bigger pulleys then used on cars, not smaller.
Cars and trucks use small pulleys so alternators can put out a lot of current with the engine at low-idle speed. That because cars often have to stop at red lights, stop signs, traffic, etc. with many accessories on.
GM typically used 2 3/4" OD pulleys on Delco 10SIs and 12SIs in cars and trucks. When Deere used the same alternators, 3 1/2" OD pulleys were often used.
Big pulleys were often used to extend the life of the alternators for farm and industrial use. Bigger pulley equals less total RPMs turned. They also provide more traction for the belt. It is also why cars and trucks with V-belts DID have belt-slippage problems with big alternators and small pulleys.
Can't see where the big pulley is an issue. I've got 4" pulleys on many of my tractor alternators and the 10SIs easily make 30 amps at engine idle-speed.
Cars and trucks use small pulleys so alternators can put out a lot of current with the engine at low-idle speed. That because cars often have to stop at red lights, stop signs, traffic, etc. with many accessories on.
GM typically used 2 3/4" OD pulleys on Delco 10SIs and 12SIs in cars and trucks. When Deere used the same alternators, 3 1/2" OD pulleys were often used.
Big pulleys were often used to extend the life of the alternators for farm and industrial use. Bigger pulley equals less total RPMs turned. They also provide more traction for the belt. It is also why cars and trucks with V-belts DID have belt-slippage problems with big alternators and small pulleys.
Can't see where the big pulley is an issue. I've got 4" pulleys on many of my tractor alternators and the 10SIs easily make 30 amps at engine idle-speed.
whizkidkyus
Member
- Location
- South Central , Ky.
Bob,
He asked about any problems and I just listed a few that HE COULD POSSIBLY RUN INTO by changing pulleys . The possibility is a slim chance on these problems ,but still you never know . Never said that I was an alternator or pulley expert.
Thank you ,
Whizkid
He asked about any problems and I just listed a few that HE COULD POSSIBLY RUN INTO by changing pulleys . The possibility is a slim chance on these problems ,but still you never know . Never said that I was an alternator or pulley expert.
Thank you ,
Whizkid
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