Alternator for a 400 Cummins

Ended up taking the coach to a friend who owns an airplane parts place and alternator rebuilding service. Once they got it off and was diagnosing for a rebuild we discovered the guts were terminally rusted and would be better to buy a new or factory rebuild.( Coach lived in Michigan for the first 4 years) So we contacted Leece Neville and they sent us a new one the next day. Thanks for the replies !

A SERIOUS big rig repair shop, such as Kenworh or Peterbilt authorized dealers usually have really good prices on new or reman stuff.

I am with ivy on the icon. When my last alternator shot craps the symbol/icon on the dash was a battery.

Anyway, I don't run a DP, but when I need an alternator I go to ORilleys and get a rebuilt one. You can get one with a life time warranty. I never got to cash in on the warranty though.

Leece Neville, Prestolite, Motorola Load Handler, all the same company different divisions.

If you decide to get it rebuilt tell them UNDER NO CIRCUMSTANCES use a rewired stator or rotor. Only use BRAND NEW stuff. Fifty Amp 200 volt PIV rectifiers. Transpo used to make some good regulators, now everything comes with soy sauce.

Yes run fast before they get you completely bent over. Any good alternator shop can rebuild that for you. The Leece Neville parts all come from Cincinnati so you shouldn't be down more than a couple of days. Easy fix. :)

Run, you are being had with a side radiator DP. I would be ashamed if I could not get it out in less than an hour which includes a coffee break while finding the right tools. There is no reason to replace it as it can be rebuilt. I'm not sure but I question that it would show up as a check engine as it has it's own light (looks like a battery) on the dash that lights up when it's not putting out enough voltage.
There are plenty of starter/alternator repair places in LOUISVILLE KY.

Take an image of the alternator and post it here in the forum. The rear side makes for the best visual ID. It should have a plate on it somewhere unless it is a Delco 21SI. If this is an 855 series 400 the alternator will be mounted starboard side of the engine (opposite the PT fuel pump) and be level with the top of the frame rail.

I would check the price of the alt to make sure they don't screw you there too.