alternator questions

[B Bair]

52, 8N side mount. 12 volt. I rescently posted about my battery smelling and leaking some acid. Thanks to all who replied. I took the battery and alternator to napa to have tested and both tested bad so I guess the alternater has been overcharging the battery longer than I thought.I plan to replace both but dont know about the alternator. It has a plug with 2 wires and 2 more wires that attach to the back. The only markings on the alt. is Delco 15R. The guy at napa said it was a chevy alt. Guess I need help knowing what to replace it with.

 

[Dell (WA)]

Bair.......most popular 12V alternator is the Delco 10-SI 'cuz it has the built-in voltage regulator. It is a "3-wire" unit and is very simple to wire-up and CHEAP. ($20 tested at the junque yard)

Some think the 1-wire is better 'cuz after all 1-wire is simpler than 3-wires, eh? Problem with the 1-wire is you haffta jazz yer cold engine to almost full throttle (1800rpms) before it will start charging. Cold engines and full throttle is receipt for rods thru the block. The 3-wire will start charging at about 600rpms.

HTH.......Dell a 12V advocate for the right reasons. That said, I haven't found the right reason for my eazy starting 52-8N. And I know 8-ways to convert and they all work the first time.

 

[JMOR]

(quoted from post at 16:46:15 10/29/10) 52, 8N side mount. 12 volt. I rescently posted about my battery smelling and leaking some acid. Thanks to all who replied. I took the battery and alternator to napa to have tested and both tested bad so I guess the alternater has been overcharging the battery longer than I thought.I plan to replace both but dont know about the alternator. It has a plug with 2 wires and 2 more wires that attach to the back. The only markings on the alt. is Delco 15R. The guy at napa said it was a chevy alt. Guess I need help knowing what to replace it with.

f you took it to a parts store & the parts man tested it, but didn't know what to replace it with!!!!!!!.........he isn't much of a patrs man!!!!!
Fine a new parts man, pronto!

 

[B Bair]

Dell, do you know if this is the 10-SI? The tractor was already 12 volt but I dont know if all Delco alternators that hook up this way will work. I have not looked for another yet mainly cause I dont know for sure what to look for.

 

[old]

I'll make it very simple for you so simple that any body who can talk can get the correct one. Ask your parts guy for an alternator that will fit a 1980 Chev pick up with no power any thing and no AC. He will give you one that is around 40 amps and should cost you less then $50 with your core.

 

[Ken(Ark)]

The guy at napa said it was a chevy alt. Guess I need help knowing what to replace it with.

While YOU would want the 37 or 42 amp 10SI so it draws less horsepower from your 25 hp motor , most parts store I have found give you the free up grade to the 63 amp alt . I recon they only have to stock a few this way .

AMX 77-78 6 cyl, 37 amp
APOLLO 73-75 37 amp
ASTRE 75-77 37 amp
BLAZER S10/JIMMY S15 83 4-121 (2.0L) and 6-173 (2.8L), 37 amp
BLAZER/JIMMY (full size) 73-86 37 amp
BONNEVILLE 81-83 37 amp
BUICK 73-79 37 amp
CAMARO 73-81 37 amp
CAPRICE 80-83 37 amp
CAPRICE 84 gasoline, 37 amp
CATALINA 81 37 amp
CENTURY 73-82 37 amp
CHEVELLE 73-77 37 amp
CHEVROLET 10 PICKUP 73-83 37 amp
CHEVROLET 10 PICKUP 84-86 gasoline, 37 amp
CHEVROLET 20 PICKUP 73-83 37 amp
CHEVROLET 20 PICKUP 84-86 gasoline, 37 amp
CHEVROLET 30 PICKUP 73-83 37 amp
CHEVROLET 30 PICKUP 84-86 gasoline, 37 amp
CHEVROLET FORWARD CONTROL 73-83 37 amp
CHEVROLET FORWARD CONTROL 84-86 gasoline, 37 amp
CHEVROLET PASS. 73-79 37 amp
CHEVROLET VAN 73-83 37 amp
CHEVROLET VAN 84-86 gasoline, 37 amp
CITATION 80-82 37 amp
CONCORD 78 4 cyl and 6 cyl, 37 amp
CORVETTE 69-82 37 amp
CUSTOM CRUISER 80-82 37 amp
CUTLASS 73-76 37 amp
CUTLASS 81 37 amp
EIGHTY EIGHT 80-82 37 amp
ELDORADO 71-74 37 amp
FIREBIRD 69 37 amp, 8-400
FIREBIRD 70-81 37 amp
GMC 1500 PICKUP 73-83 37 amp
GMC 1500 PICKUP 84-86 gasoline, 37 amp
GMC 2500 PICKUP 73-83 37 amp
GMC 2500 PICKUP 84-86 gasoline, 37 amp
GMC 3500 PICKUP 73-83 37 amp
GMC 3500 PICKUP 84-86 gasoline, 37 amp
GMC FORWARD CONTROL 73-83 37 amp
GMC FORWARD CONTROL 84-86 gasoline, 37 amp
GMC VAN 73-83 37 amp
GMC VAN 84-86 gasoline, 37 amp
GRAND PRIX 71-82 37 amp
GREMLIN 75-77 6 cyl, 37 amp
GREMLIN 78 37 amp
HORNET 75-77 6 cyl, 37 amp
IMPALA 80-83 37 amp
IMPALA 84 gasoline, 37 amp
INTERNATIONAL 72-73 Pickup & Travelall; 37 amp
INTERNATIONAL 74 Pickup & Travelall; 37 amp, exc. 8-400
INTERNATIONAL 75 Pickup & Travelall; 37 amp
LE MANS 73-77 37 amp
LE MANS 80-81 37 amp
MALIBU 78-81 37 amp
MALIBU 82 exc. 6 cyl diesel; 37 amp
MALIBU 83 6-229 (3.8L), 37 amp
MALIBU 83 8-305 (5.0L), 37 amp
MALIBU 84 gasoline, 37 amp
MONTE CARLO 73-81 37 amp
MONTE CARLO 82 exc. 6 cyl diesel; 37 amp
MONTE CARLO 83 6-229 (3.8L), 37 amp
MONTE CARLO 83 8-305 (5.0L), 37 amp
MONTE CARLO 84 gasoline, 37 amp
MONZA 75-80 37 amp
NINETY EIGHT 80-82 37 amp
NOVA 73-79 37 amp
OLDSMOBILE 73-79 37 amp
OLDSMOBILE F85 69 37 amp, 4-4-2
OLDSMOBILE F85 71 37 amp, 4-4-2
OMEGA 73-82 37 amp
PACER 75-77 37 amp
PACER 78 6 cyl, 37 amp
PARISIENNE 81-83 37 amp
PHOENIX 77-82 37 amp
PONTIAC 71-79 37 amp
REGAL 73-81 37 amp
RIVIERA 73-79 37 amp
RIVIERA 81 37 amp
S10/S15/SONOMA 82 6 cyl, 37 amp
S10/S15/SONOMA 83 4-121 (2.0L), 37 amp
S10/S15/SONOMA 83 6-173 (2.8L), 37 amp
SCOUT 72-76 37 amp
SCOUT 77-80 gasoline, 37 amp
SKYHAWK 75-80 37 amp
SKYLARK 75-82 37 amp
SPRINT (GMC) 73-83 37 amp
SPRINT (GMC) 84 gasoline, 37 amp
STARFIRE 75-80 37 amp
SUBURBAN 10 73-83 37 amp
SUBURBAN 10 84-86 gasoline, 37 amp
SUBURBAN 1500 73-83 37 amp
SUBURBAN 1500 84-86 gasoline, 37 amp
SUBURBAN 20 73-83 37 amp
SUBURBAN 20 84-86 gasoline, 37 amp
SUBURBAN 2500 73-83 37 amp
SUBURBAN 2500 84-86 gasoline, 37 amp
SUNBIRD 76-80 37 amp
TEMPEST 71-72 37 amp
TORONADO 72-75 37 amp
VEGA 71-77 37 amp
VENTURA II 72 37 amp, 8-350
VENTURA II 73-77 37 amp

 

[Hobo,NC]

(quoted from post at 23:02:04 10/29/10) Dell, do you know if this is the 10-SI? The tractor was already 12 volt but I dont know if all Delco alternators that hook up this way will work. I have not looked for another yet mainly cause I dont know for sure what to look for.


They are EZ to repair and check,,, I don't know why anyone would remove it to have it checked... its bolted to the engine check it their... course you need a good battery...

I would install the new bat install the alt and recheck... You will need a voltmeter and mite as well use the useless amp gauge that's on the tractor,,, all its needed for is to test the rated max amp output,,, tho I doubt yer tractor engine is capable of churning out.... That make it still useless... a voltmeter is really all you need...

I also guarantee it not the first are last that a parts store rejected that mite B good...

 

[B Bair]

Thank you all. You have answered my question and then some. Along with the alternator I will need to purchace a volt meter as there is no ammeter on the tractor.

 

[Fairlane6t9]

Industry standard part number is a 7127M-3, M-9, or M-12. The difference is the clock position for the wiring harness. Any of these would work, although you may need to loosen the case bolts and pull the front forward just enough to rotate the front case a bit. You'll have to swap pulleys anyway, so that's the time to "clock" the alternator. These alternators are popular from about 1972 on up into the 1980's.

 

[Jimmyjack]

Dell, you gets what you pay for in one wire alternators. The el cheapo ones may need to get jazzed to high rpms to kick in, but for a few more bucks you can get one that will match the 600 you mentioned easily. Im talking $40 vs. $55 new off the shelf.

 

[Bob]

FWIW, a bad (sulfated) battery will puke acid when charged at a normal rate.

 

[Phil Eastman]

That is the correct alternator. I bought 2 of them today at $44 each.