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  #1  
Old 12-29-2012, 02:56 PM
petrotech petrotech is offline
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Default 104 alternator install

I have a 104 that has had charging problems for several years. It has a new V/R and the S/G tests OK. I am considering putting a 30 amp alternator on it and using the S/G as a starter only. I am concerned about getting enough RPM to let the alternator charge properly. The front pulley is a large enough diameter but the muffler is in the way of routing the belt on the opposite side of the motor from the S/G (the only place to mount the alternator). The rear pulley diameter is what concerns me. Has anyone had any experiance with this?
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Old 12-29-2012, 05:10 PM
wawcub47 wawcub47 is offline
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ive considered this option my self. keeping s/g to start and alt. to charge battery. I saw a very small alt.ithink the brand was denso.
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Old 12-29-2012, 05:46 PM
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cubfixer cubfixer is offline
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My 100 would not keep the battery charged. Did a lot of stuff to it over a year. I recently bought a new S/G to put on my 100. Also had put a VR on it. No problems charging now.

Took the old S/G to an generator shop. They tested it and found that it would charge for 5 minutes, then the windings in the armature would open up, and it would stop charging. They replaced the armature and it works perfectly now.

It would start fine, but not keep the battery charged.

Cheapest fix is to buy a new generator. Usually $120.00, includes shipping.
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Proud Owner of a Model 100 and a Model 124.
A homemade cart, 2 x 42" mower decks, a 38" deck,
a 42" front NF blade, and a lawn sweeper!
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Old 12-29-2012, 08:52 PM
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ol'George ol'George is offline
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An alternator will charge @ a much lower RPM. than a gen. one of the many reasons we went to it in the big 3 auto ind. in '63
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Old 12-29-2012, 09:23 PM
petrotech petrotech is offline
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Thanks for the advice. One thing I didn't mention is that I want to put lights on the 104 as it has none now. I primarily use it for blading snow and it is usually dark when I have time. An alternator should keep the lights from dimming since it will run the electric system a lot more effeciently than a generator. I've looked at some low amperage automotive units I can buy for less than $50.00 and some Denko ones that run $250.00. Being cheap, I will probably buy something made for a 1980s Japanese car. They are low amperage and physically small.
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Old 12-30-2012, 09:17 AM
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ol'George ol'George is offline
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Denso used to make a little en, we used them on out hi/lows @ work,
thinking it is like 35-45 amps. they had Nissan 4 cyl.s in them.
I'm using one on the IH 400 loader tractor, and a nutter one on my 2 cyl 730 J.D.Diesel
You might go to an auto salvage yard, and look for little ferrin units, the older the better as they use huge 100Amp + units today to run all the
eeelectronicks. Ha,LOL!
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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