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Dang, those diode’s are a whopping $3.50 each.

Maybe a different plan of attack. The front drive pulley removed would allow aprox 3” more for the armature to travel back. That would give me enough access to the diode pack to lift the leads going to the armature to test the diodes without unsoldering them(preffered method in serv manual) and...

Thanks for the heads up. I am going to space the pulley on the front of the GEN head so it can only travel approximately a half inch. Use some wood blocks on this end bell and force it off of the bearing race. My employer told me that I was welcome to use the company induction heater, so I may...

I do not have those and thank you for those TM numbers. I will start searching those out immediately, as with winter coming I want this generator working properly as an emergency back up.

I am using this file as a reference for disassembly and circuit configuration

Top pic is the offending end bell. When the 4 bolts are removed, The Armature assembly will slide back approximately One and a half inches. But the bell does not want to come off of the bearing race that is attached to the Armature

I apologize. This is an M1031 contact maintenance truck with the PTO driven genset. It is a 208/120 V set up. But thank you for your assistance as all is appreciated. I will snap some pictures, So others can get a better picture in their head about this end bell That appears to be stuck on the...

An added twist ,I was walking past the truck and just had to try it again. Put my meter in a 120 V outlet and fired it up. Watch the voltage climb up to 120, plugged in a trouble light and it worked fine. After about 30 seconds I watch the voltage start falling off to the original exciter...

Ok fellow 1031 owners, Who has pulled off of one of these end cap/bearing retainers before? I am sure that it must be a tight fit for the race in the cap, otherwise the race would spin inside the cap. I am ashamed to ask this, as I replace electric motor bearings quite frequently on the job. But...

The bearing cap is stuck on the race and I cannot remove it without getting radical. The disassembly image shows that bearing cap should come right off that race. If there is a bad diode, I’m going to have to pull the bearing. I do not own an induction heater to get the bearing back on if...

Thank you for your reply, as I was thinking the same. If I am reading the print correctly, they’re basically using a wheat stone bridge as a shunt circuit. I think I’m going to open her up today and check the diode‘s.

I forgot to mention that I checked continuity through all the breakers.

Been doing a little refreshing on the old truck. A fresh Inj. pump, Filters etc. so I go to use the generator today, RPMs come up, air compressor kicked on and everything went dead. Got the meter out and open the distribution panel and measured directly off the leads coming from the gen head. I...