New Armature? - 11/14/09 02:56 PM
Help, I need a new (or rewound) armature for a 943J Delco-Remy
generator. Anybody know where I can get one? Thank you, Bob
generator. Anybody know where I can get one? Thank you, Bob
Re: New Armature? - 11/14/09 03:57 PM
Go to your local starter/generator shop. They can either order one for you or send your armature in to be rewound.
Re: New Armature? - 11/14/09 06:18 PM
Hello JYD,
I don't know of any local starter/generator shops in my immediate area. So I'll look and ask around. I was hoping
just to find some new ones and buy them out right. I've asked
one place (email) that I bought new bearings and field coils from to see if they had any armatures that would work. I read that the 1929 to 1939 armatures are pretty much the same and will interchange. Fortunately I'm a firm beleiver in spare parts and in the past I scooped up an NOS Delco-Remy
armature #1871826, the 1929 armature part is #817221. It "appears" to be working o'k, but my freshly emplaced NOS amp guage is now acting funny. I had driven the car about 10 miles with the wires to the brushes on backward.....
'nough said about that. Thanks for the advice, JYD. Bob
I don't know of any local starter/generator shops in my immediate area. So I'll look and ask around. I was hoping
just to find some new ones and buy them out right. I've asked
one place (email) that I bought new bearings and field coils from to see if they had any armatures that would work. I read that the 1929 to 1939 armatures are pretty much the same and will interchange. Fortunately I'm a firm beleiver in spare parts and in the past I scooped up an NOS Delco-Remy
armature #1871826, the 1929 armature part is #817221. It "appears" to be working o'k, but my freshly emplaced NOS amp guage is now acting funny. I had driven the car about 10 miles with the wires to the brushes on backward.....
'nough said about that. Thanks for the advice, JYD. Bob
Re: New Armature? - 11/14/09 06:56 PM
JYD,
Will a part #1854856 armature work? It supposedly is for 34-35-36 Chevy Masters.
Bob
Will a part #1854856 armature work? It supposedly is for 34-35-36 Chevy Masters.
Bob
Re: New Armature? - 11/15/09 02:24 AM
Yes, that armature will work.
On your amp gauge, make sure it is defective before you change it. You can test the amp gauge off of the car to see if it is working correctly. What is your amp gauge doing?
On your amp gauge, make sure it is defective before you change it. You can test the amp gauge off of the car to see if it is working correctly. What is your amp gauge doing?
Re: New Armature? - 11/15/09 11:39 AM
The NOS amp gauge is very irratic with the NOS armature that I placed in the generator. The gauge neddle jumps around a lot, but does give a basic reading of charge/discharge when it is suppose to, I guess. I was thinking (or is that hoping!) that the gauge readings would be "smoother". I guess if I had been in a box for 80 years I would be hopping around too when I got out....LOL! 
I was unable to replace the field coils becuase I could not loosen the coil shoe screws. Maybe that has something to do with it? What'a ya' think Mutt?
;)Bob
PS: The NOS gauge worked find for the generator until the crossed brush wires burnt up the armature. When I realized
that something was wrong and headed home. The amp gauge neddle was hopping all over the place, but mostly in the discharge area
then quit moving all together just before I rolled into my shop.
I was unable to replace the field coils becuase I could not loosen the coil shoe screws. Maybe that has something to do with it? What'a ya' think Mutt?;)Bob
PS: The NOS gauge worked find for the generator until the crossed brush wires burnt up the armature. When I realized
that something was wrong and headed home. The amp gauge neddle was hopping all over the place, but mostly in the discharge area
then quit moving all together just before I rolled into my shop.
Re: New Armature? - 11/15/09 03:45 PM
Sounds like the problem might be with your generator and not your amp meter. You can remove your amp meter and test it on the workbench using a six volt battery and a current draw like a six volt fan motor. The bench test will determine if your amp meter is working correctly or not.
If the comm. on the new armature is slightly rough that will cause the brushes in the generator to bounce, therefore the needle on the amp gauge will also oscillate back and forth. The brushes must be seated with a brush stone or the amp meter needle might tend to oscillate. A weak brush arm spring will cause the same problem.
To remove the pole shoe screws, place a long round metal bar the size of the screw head on top of the screw and hit the metal bar hard several times with a heavy hammer. Then use a impact screwdriver to remove the pole shoe screws.
If the armature is definitely fried, then I would replace the field coils as well as an added precaution, and when you attach the wires inside of the generator make sure that you attach the wires correctly.
If the comm. on the new armature is slightly rough that will cause the brushes in the generator to bounce, therefore the needle on the amp gauge will also oscillate back and forth. The brushes must be seated with a brush stone or the amp meter needle might tend to oscillate. A weak brush arm spring will cause the same problem.
To remove the pole shoe screws, place a long round metal bar the size of the screw head on top of the screw and hit the metal bar hard several times with a heavy hammer. Then use a impact screwdriver to remove the pole shoe screws.
If the armature is definitely fried, then I would replace the field coils as well as an added precaution, and when you attach the wires inside of the generator make sure that you attach the wires correctly.