voltage regulator

JAYSON

JAYSON

Member
74 100 p/u 345 problem:
just installed my voltage gauge found out my alt is only duming out 12v and with lights and heater on drops to about 10-11 im going for a v regulator ? And where is it located and anyway to test
 
If the engine is original to the truck, then it would have come with a GM 10si style alternator with internal voltage regulator. No telling what's on there now without a picture. I'd pull your battery and your alternator and take them both down to the parts store of your choice for free testing. If the alternator fails, inexpensive remanufactured units are plentiful as it is a GM device and not at all specific to IH. The general consensus on this forum and others is that it generally isn't cost and labor effective to replace the ivr on your old-ass alternator. Better to replace the whole unit and have a warranty.
 
scoutboy74 said:
if the engine is original to the truck, then it would have come with a GM 10si style alternator with internal voltage regulator. No telling what's on there now without a picture. I'd pull your battery and your alternator and take them both down to the parts store of your choice for free testing. If the alternator fails, inexpensive remanufactured units are plentiful as it is a GM device and not at all specific to IH. The general consensus on this forum and others is that it generally isn't cost and labor effective to replace the ivr on your old-ass alternator. Better to replace the whole unit and have a warranty.
Click to expand...

Times dos!!

Even I don't fook with them crapball 10si juicers, too cheep to replace.

You will have to swap the pulleys most likely, the replacements never have the same pulleys IH spec'd. And that oem pulley issa "variable" groove pulley...it ain't an "a" groove, aint' a "b" groove...it's a variable groove bastard workaround that IH and delco dreamed up.
 
I recently went to get a new alternator myself at my local kragens.

The parts monkey pulled the part, and offered to swap pulleys for me. So I watched him pull the pulley off and attempt to put it on mine..

The IH pulley wouldn't go on the alternator. The alt had a metal collar or bushing spacing out the single groove pulley on the alternator and removing the bushing made the IH pulley rub on the case of the alternator.

Be sure and check the fit of your new pulley before you leave the parts store I guess!
:ciappa:
 
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