bullfrog5.9

will a 94 voltage regulator work on a 93 truck im talking bout the one that goes on the back of the alternator

ofcmarc

There's a link in the Sticky on coverting the alt. to an internaly regulated version. I don't know if the 2nd gen alternators are the same though......

wannadiesel

That black thing on the back of the alternator is not a regulator.

bullfrog5.9

ok the black thing on the back of my alternator is broken and i hav a 94 black thing will it work on the my 93

Jim Lane

The black thing is only the terminals so you get them on the proper studs.

That was the first thing that I removed and installed #4-gauge welding cable from the alternator directly to the battery through a 200-amp fuse.

I could not see how the engineers thought they were going to push 120-amperes through a #6-gauge wire without overheating it.

BTW if you decide to upgrade the battery (+) wire make sure that you also supply a better (-) ground from alternator to engine AND alternator to chassis.
Jim

BearKiller

Is that what these externally-regulated alternators are, 120-amp ??

Who actually makes them ??

Do they have a reputation for durability/ longevity/dependability; or, are they short-lived, troublesome, and prone to failure ??



Thanks.

wannadiesel

Yes, 120 amps. They are Nippondenso alternators and they are very good. Most of the trucks I've worked on still had the original alternator after 10-15 years and hundreds of thousands of miles. When they stop charging, usually a new set of brushes is all that's required to get them going again.

Jim Lane

The only problem that I have had with the ND was the brushes and they get hot when they get to the upper limits.

I have an inverter that I use that can draw up to 100 amps off my Deep Cycle battery, I sometimes have to run equipment off the inverter for hours so I had to leave the engine running at a fast idle to keep the battery charged.

The alternator case would get so hot that you could not touch it for more that a second, I also melted the connector about 18" down from the alternator so I replaced the tiny 6-gauge wire with #4 welding cable straight to the battery.

The alternator was never designed to charge at an idle but more at cruising speeds.
Now with my Leece Neville 160-amp alternator I can run my inverter with the truck idling, the 555JHO puts out 100-amps at 2000 shaft RPM or just a bit above an idle.