Need Alternator

[Tntneave]

Looking for an alternator and belt for a Satoh S750D with an Isuzu 3AB1 engine in it. Hoping someone can help. Thanks in advance.

 

[Dave M7040]

Many of these small tractors actually have a dynamo and not an alternator although sometimes the dynamo is called an alternator.

Could you plse post a photo and also explain how you decided the alternator needed to be replaced.

Many owners find it much better to take the route of a one wire Denso Alternator. Its output is 35 amps.

I suggest you go with a mini DENSO one wire alternator. About $60 on ebay.

12V ALTERNATOR FOR CHEVY GM MINI DENSO STREET ROD RACE 1-WIRE 1218� 87-92 | eBay

You remove the existing wiring to your old alternator and tape up the ends of the wires.

With the new alternator, you run one new 10 or 12 gauge wire from the large terminal on the new Denso to the battery post on your starter.

Job done.

You don't use any existing wiring just leave it in place to make the job simple.

Using your existing wiring and connecting it to an alternator, which is not identical in every respect to the original one will leave you and most others frustrated.

If you absolutely have to have a charge light, then go with as charge indicator which is a self contained voltage sensor which turns on the lamp if the voltage goes below a set threshold. Absolutely as simple to install as a voltmeter. It has no interaction with the alternator nor its wiring. One wire to ground and the other to the battery +. Less than $10.

DC12V-24V New Car Motorcycle LED Panel Digital Voltage Meter Display Voltmeter | eBay

Here is the feed back from an owner of a small Kubota who chose to follow my suggestions.

Re: Alternator Prices
Got the new alternator installed the other day, very simple installation without having to make any mechanical changes.
Used the original battery + terminal and cut off the old 4 pin connector.
Thought about it for while and decided to connect the new LED voltmeter to the key switch.
Left everything else as was. This way if I forget to turn the key off the old idiot light will stay light and remind me to turn it off.
Worked great, 14.8v at startup and idle.

Dave M7040

 

[VashonFarmer]

This post does not apply to me (at this moment, any way), but I'd like to give Dave M7040 a big kudos. This is the kind of response that makes this such a great site. Tractorbynet has pulled me out of several metaphorical ditches and I am always greatful. Thank you!

 

[Dave M7040]

This post does not apply to me (at this moment, any way), but I'd like to give Dave M7040 a big kudos. This is the kind of response that makes this such a great site. Tractorbynet has pulled me out of several metaphorical ditches and I am always greatful. Thank you!

Sent you a pm

Dave M7040

 

[Tntneave]

Thanks Dave. Sorry for the 2 month past due reply. Got tied up at work and the tractor has been sitting with no time to mess with it. Finnishing up a big project and finally got around to reading your reply and ordering the mini denso. Great advice and detailed directions. I love it. Thanks again!! I will update once I get it installed.

 

[radios1]

Many of these small tractors actually have a dynamo and not an alternator although sometimes the dynamo is called an alternator.

Could you plse post a photo and also explain how you decided the alternator needed to be replaced.

Many owners find it much better to take the route of a one wire Denso Alternator. Its output is 35 amps.

I suggest you go with a mini DENSO one wire alternator. About $60 on ebay.

12V ALTERNATOR FOR CHEVY GM MINI DENSO STREET ROD RACE 1-WIRE 1218� 87-92 | eBay

You remove the existing wiring to your old alternator and tape up the ends of the wires.

With the new alternator, you run one new 10 or 12 gauge wire from the large terminal on the new Denso to the battery post on your starter.

Job done.

You don't use any existing wiring just leave it in place to make the job simple.

Using your existing wiring and connecting it to an alternator, which is not identical in every respect to the original one will leave you and most others frustrated.

If you absolutely have to have a charge light, then go with as charge indicator which is a self contained voltage sensor which turns on the lamp if the voltage goes below a set threshold. Absolutely as simple to install as a voltmeter. It has no interaction with the alternator nor its wiring. One wire to ground and the other to the battery +. Less than $10.

DC12V-24V New Car Motorcycle LED Panel Digital Voltage Meter Display Voltmeter | eBay

Here is the feed back from an owner of a small Kubota who chose to follow my suggestions.

Re: Alternator Prices
Got the new alternator installed the other day, very simple installation without having to make any mechanical changes.
Used the original battery + terminal and cut off the old 4 pin connector.
Thought about it for while and decided to connect the new LED voltmeter to the key switch.
Left everything else as was. This way if I forget to turn the key off the old idiot light will stay light and remind me to turn it off.
Worked great, 14.8v at startup and idle.

Dave M7040

you don't want 14.8 volts at the battery, 14 volts is about it, unless you don't mind cooking the battery, he may have measured that voltage at the alternator itself, which, if only a 10 or 12 gauge wire was used, would account for the voltage drop at the battery itself.. the problem is, if there is not enough load on the alternator wire, the voltage at the battery will go to that 14.8 volts, like if the battery is fully charged, and not enough accessories are drawing enough amperage to drop the voltage.. from me, an MSEE.. I'd use a 6 gauge wire..

 

[Homeline]

When replaced the alt on my Iseki with an Isuzu 3AE1 engine, I found that searching for a alt for an industrial engine was much cheaper than one specifically for my tractor. Spent $125 vs $200+

Also learned later that some of late 70's alts for (IIRC) a Datsun would have worked too.

I did have to make an adapter harness as the connections were different. But it bolted right up with no issues.

Belt can be picked up at any well stocked parts store. Take old one with and size it up.