We were running the 37 Pu today to check out the systems and sort out any issues and found the gen light stays on.
Generator first - while checking the wiring I noticed that the 37 generator has 3 wires coming out-in, Field, Armature, and Ground -
The Regulator we have does not have a post for ground, as it is only a 4 post (B-F-T-A) regulator. The 37 was F-Gd-A-T-B. We polarized the generator.
I also notice in the manuals that earlier 36 does not have the extra generator ground wire and the 1940 doesn't have it in the schematic either. So I guess from 37 until 39 the generator ground was used?
Can I use a 4 post regulator in place of the 5 post with ground that the 37 came with? Just leave off the ground wire from Gen to Regulator?
Hi.
Is this a charging system that has performed correctly in the past but has changed its attitude recently?
The ground wire is only necessary if the regulator base is insulated from the frame/body or if you just like the warm fuzzy feeling of having a dedicated ground connection....I know I do.
There are too many unknowns to give you a clear answer. Do you know the history of the vehicle so that you can be sure the generator and regulator are correct or at least a match for one another? (I've never gotten a "yes" to that one).
Let's just start with "is this a new problem?".
Frank,
This whole project came to me in boxes and pieces. I had to assemble everything after years of being taken apart by some one else. According to the manual, the 36 regulator is a 4 post and the 37 is a 5 post that used a ground from the generator like the one installed.
So, we are starting from scratch with no "knowns".
I guess I should have mentioned that NOT using the ground wire makes it imperative that there be a good grounding path through the engine/frame/body. If the vehicle had been disassembled, it may not have the ground straps between the frame, engine and body. I'm not a fan of grounding through old sheet metal parts (or new ones, either) so using a dedicated ground between gen and reg is a good idea anyway.
I'll have more after I pass it by my "staff" electrical engineer. I hope you can wade through it........I'm one of those guys who, when you ask how to turn on the lights, I attempt to tell you how to build a nuclear power plant. No, I don't know how.
P[quote="Frank Hughes" post=235]I guess I should have mentioned that NOT using the ground wire makes it imperative that there be a good grounding path through the engine/frame/body. If the vehicle had been disassembled, it may not have the ground straps between the frame, engine and body. I'm not a fan of grounding through old sheet metal parts (or new ones, either) so using a dedicated ground between gen and reg is a good idea anyway.
I'll have more after I pass it by my "staff" electrical engineer. I hope you can wade through it........I'm one of those guys who, when you ask how to turn on the lights, I attempt to tell you how to build a nuclear power plant. No, I don't know how.
Frank, I put extra grounds to the fire wall, frame and engine to firewall. Made sure the paint is off for good grounds. The engine readily turns and starts,runs. I will double check to make sure we have good ground to regulator.
Thanks!
UPDATE
Everything working ! Problem was the generator dash light was in the wrong socket.
Light comes on when "key on" and goes out when running.
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