Generator
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[QUOTE=Super88chris;1544585]
and no I have not removed the shoes
Stellar - I'm pretty certain SuperChris has not removed the shoes - the shoes are still attached to the yoke. Since previously we knew he measured ~14VDC I was thinking we just measure for open, short, resistance & continuity and call it a day? If the numbers reported work out we just reassemble. What do you think?[/QUOTE
hey guys I know you’ve sent me a few messages and I apologize I haven’t event read them completely yet cuz I haven’t had the time. I had a more pressing issue on the old 88 that’s taken me all yesterday and today to get straightened out. But I saw the posts and I’ll read them tonight if I’m not too out of it or tomorrow when I plan to get back on the gen so I can give a proper reply back. Thank you guys I appreciate the help. Happy new years to you guys and be safe! Talk tomorrow
hey guys I know you’ve sent me a few messages and I apologize I haven’t event read them completely yet cuz I haven’t had the time. I had a more pressing issue on the old 88 that’s taken me all yesterday and today to get straightened out. But I saw the posts and I’ll read them tonight if I’m not too out of it or tomorrow when I plan to get back on the gen so I can give a proper reply back. Thank you guys I appreciate the help. Happy new years to you guys and be safe! Talk tomorrow
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Hey guys I’m back, and wow there’s a lot of posts to catch up on. Thank you for all that. Yes you’re correct on what’s been happening with my gen since it’s been going out. And yes I believe my VR is grounded through the base of it. Yes I still need to check the field windings. My rebuild kit should be here this sat. Sorry there’s just the overall to all those posts. And there is a -30 and +30 on my amp gauge in my car if that answers your question. When the gen worked and was charging my battery it was at almost 14 volts. So I don’t have a tap or a vise but I do have a drill if that helps? Sorry if this vague compared to all the detailed posts
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Chris - Let's move along w/ basic testing to get ahead of the game. Now that we know there is one wire which runs through the field coil windings, this one wire must be continuous from one end to the other end. Makes sense right? It can't be touching some other piece of the GEN such as the yoke (case) - it must be continuous and you'll measure continuity of this wire as you've done previously w/ the armature.
Set your volt meter to continuity symbol. Place one probe on one end of the wire the other probe on the other end of the wire. You should hear the meter beep - indicating a continuous flow from end of the wire to the other end of the wire. If you do NOT get a beep, the wire is not continuous and has shorted (open circuit) somewhere along its path.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
Set your volt meter to continuity symbol. Place one probe on one end of the wire the other probe on the other end of the wire. You should hear the meter beep - indicating a continuous flow from end of the wire to the other end of the wire. If you do NOT get a beep, the wire is not continuous and has shorted (open circuit) somewhere along its path.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
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tomorrow is the day my rebuild kit comes, only thing I’m worried about is getting that bushing out, did we decide what my best bet is for that? Seeing as how I have minimal tools. If there’s something cheap I can go get I will
I hate to break it to you, but if you don't have some tools and at least a little money to spend, old cars will be a challenge. Go look around at Harbor Freight. They have some cheap tool sets that have the basics you need to get by. Most of us didn't start out with Craftsman or Snap On tools. One other thing you really need is a Factory Service Manual. You can find them on ebay and shop them for the best price. Prices are all over the place. Get an original one and not one of the repros. It will pay for itself quickly. It is the best money you will spend on you car.
Reply,
I hate to break it to you, but if you don't have some tools and at least a little money to spend, old cars will be a challenge. Go look around at Harbor Freight. They have some cheap tool sets that have the basics you need to get by. Most of us didn't start out with Craftsman or Snap On tools. One other thing you really need is a Factory Service Manual. You can find them on ebay and shop them for the best price. Prices are all over the place. Get an original one and not one of the repros. It will pay for itself quickly. It is the best money you will spend on you car.
DO NOT buy the manual from Rock Auto. That will be a reproduction. You want an original with some greasy fingerprints on it. There are several on ebay with the cheapest one being $20.00. It is a little tired but that is okay. The next one is $37.69 and looks to be in better condition. You can be the judge and you know what your budget is. DO NOT get the CD version either. Here is a link to the $20.00 one. Other are at the bottom.
1955 Oldsmobile Shop Service Repair Manual | eBay
1955 Oldsmobile Shop Service Repair Manual | eBay
Since we're not clairvoyant we don't know what tools you have (do you have a vice?). In any case, it's going to require some finesse, patience & prudence on your part to decide what best works for you. Each of us might likely remove the bushing a little differently. The one side of the bushing looks very thin from wear. Personally, I'd work on collapsing that really thin side of the bushing w/ whatever tool(s) you have available & yanking that sucker out of there. (You could saw it out w/ a Dremel if you had a Dremel) Just don't deeply gouge or round-out the hole which accommodates the bushing. Good Luck!
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Very nice to see the videos. If you use a tap, be sure to not drive the tap against the bottom of the hole. It will break the end of the housing. The end cap that holds the bushing is aluminium , so don't drive it in and bottom it out to remove the bushing like shown in the first video. The last video would be better. You could even just put the tap in a vise instead of finding a bolt to use and tap either side of the housig to remove the bushing like it is shown in the third video. You could also chisle it out like the second video, but I would use a smaller pointed tool to do it. Even an old screwdriver ground and sharpened to a point on a grinding wheel. You will not find a parting line on the bushing. There is none on that bushing. If you score the aluminium when chipping out the old bushing, do not be overly concerned as long as it isn't a severe gouge. The bushings are thick and pretty stout. I can't tell from the pictures if the bushing in there now has a hole for the oil wick. Some replacement bushings don't have the hole. If it doesn't have the hole it is probably an oil impregnated bushing and won't need to be oiled in the future.
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I tested the field windings and all was good. There was no beep. And I got the bushing out I just chizled it out with a screw driver didn’t take much force so I didn’t damage the end cap, just waiting on the rebuild kit
Chris - Let's move along w/ basic testing to get ahead of the game. Now that we know there is one wire which runs through the field coil windings, this one wire must be continuous from one end to the other end. Makes sense right? It can't be touching some other piece of the GEN such as the yoke (case) - it must be continuous and you'll measure continuity of this wire as you've done previously w/ the armature.
Set your volt meter to continuity symbol. Place one probe on one end of the wire the other probe on the other end of the wire. You should hear the meter beep - indicating a continuous flow from end of the wire to the other end of the wire. If you do NOT get a beep, the wire is not continuous and has shorted (open circuit) somewhere along its path.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
Set your volt meter to continuity symbol. Place one probe on one end of the wire the other probe on the other end of the wire. You should hear the meter beep - indicating a continuous flow from end of the wire to the other end of the wire. If you do NOT get a beep, the wire is not continuous and has shorted (open circuit) somewhere along its path.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
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To be honest I wanted to be sure I did it right so I tested the fields on the lowest ohms setting and it came up 7.3 then I tested on that arrow symbol on the multi meter and there was no beep and it came up 007. The video wasn’t really clear to me. My bad if I did it wrong, don’t give up on me yet
To be honest I wanted to be sure I did it right so I tested the fields on the lowest ohms setting and it came up 7.3 then I tested on that arrow symbol on the multi meter and there was no beep and it came up 007. The video wasn’t really clear to me. My bad if I did it wrong, don’t give up on me yet
Set your volt meter to continuity symbol. Place one probe on one end of the wire the other probe on the other end of the wire. You should hear the meter beep - indicating a continuous flow from end of the wire to the other end of the wire. If you do NOT get a beep, the wire is not continuous and has shorted (open circuit) somewhere along its path.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
Report back if you get a beep indicating continuity.
Next, measure the resistance of this same wire. Set the meter to the lowest setting which most likely is going to be around 20 Ohms or maybe 200 Ohms. Read the amount of resistance contained in this wire's pathway.
Report back what the resistance (Ohms) is of this wire.
OK. I have things to take care of...you realize both ends of the field windings are unattached/disconnected just like in the video - even though you haven't removed the field windings themselves. It is "that" wire (both ends) in which you need to measure both continuity & resistance.
No. It is not a requirement to remove the field windings at this point. Stellar suggested you leave the field windings and the shoes in place in the GEN. That will more or less assist in not having to re-align the field shoes since their position is rather important - they can't be off-centered, flipped around, etc.; so, leaving them in place is a good idea. However, that one wire which emanates from the field windings on both sides cannot be touching anything - both ends need to free so you can get a measurement of continuity & resistance.
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No. It is not a requirement to remove the field windings at this point. Stellar suggested you leave the field windings and the shoes in place in the GEN. That will more or less assist in not having to re-align the field shoes since their position is rather important - they can't be off-centered, flipped around, etc.; so, leaving them in place is a good idea. However, that one wire which emanates from the field windings on both sides cannot be touching anything - both ends need to free so you can get a measurement of continuity & resistance.
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The process to check continuity between fields. It is for me to cuz it’s my gen I can’t figure out. My meter is a piece of junk all I hear is it trying to beep. It was 5 bucks so that’s what I get. Just got the new busing in. If it doesn’t work I’ll get a new gen, I’m not an electrical guy never have been
Understand this can be frustrating. Make sure battery is good in the meter. I'd really like to see you measure continuity & resistance of that one field windings wire.
FWIW, what we're doing at this point is validating integrity of wiring, armature, collector & field windings wire for any suspect conditions such as continuity, opens, shorts, resistance. This is essentially a "static" test of the wiring/components to help you make an informed decision regarding the re-assembly of your GEN. You may arrive at some point where you've had enough of it all (again, understand it's frustrating) and just want to reassemble the GEN w/ new bushing, bearing & brushes. Don't forget to clean those spaces of carbon build-up in the commutator, spray the armature, perform a good overall cleaning of everything.
A "dynamic" test would be more informative and help to illustrate the actual capabilities of the GEN - something likened to what a GEN rebuild shop would perform. However, this is more or less outside the direction of this thread since you would be measuring the GEN under load (amperage/voltage), etc. while the GEN was actually turning/operating in a "dynamic" state. Do the best you can. Good Luck!
FWIW, what we're doing at this point is validating integrity of wiring, armature, collector & field windings wire for any suspect conditions such as continuity, opens, shorts, resistance. This is essentially a "static" test of the wiring/components to help you make an informed decision regarding the re-assembly of your GEN. You may arrive at some point where you've had enough of it all (again, understand it's frustrating) and just want to reassemble the GEN w/ new bushing, bearing & brushes. Don't forget to clean those spaces of carbon build-up in the commutator, spray the armature, perform a good overall cleaning of everything.
A "dynamic" test would be more informative and help to illustrate the actual capabilities of the GEN - something likened to what a GEN rebuild shop would perform. However, this is more or less outside the direction of this thread since you would be measuring the GEN under load (amperage/voltage), etc. while the GEN was actually turning/operating in a "dynamic" state. Do the best you can. Good Luck!
I don't need to chill. I have been on this website since 2006 and have seen plenty long threads. I don't care if he has a thousand posts. I was just making a suggestion that would save the OP some time and lots of frustration.
Rrply
Understand this can be frustrating. Make sure battery is good in the meter. I'd really like to see you measure continuity & resistance of that one field windings wire.
FWIW, what we're doing at this point is validating integrity of wiring, armature, collector & field windings wire for any suspect conditions such as continuity, opens, shorts, resistance. This is essentially a "static" test of the wiring/components to help you make an informed decision regarding the re-assembly of your GEN. You may arrive at some point where you've had enough of it all (again, understand it's frustrating) and just want to reassemble the GEN w/ new bushing, bearing & brushes. Don't forget to clean those spaces of carbon build-up in the commutator, spray the armature, perform a good overall cleaning of everything.
A "dynamic" test would be more informative and help to illustrate the actual capabilities of the GEN - something likened to what a GEN rebuild shop would perform. However, this is more or less outside the direction of this thread since you would be measuring the GEN under load (amperage/voltage), etc. while the GEN was actually turning/operating in a "dynamic" state. Do the best you can. Good Luck!
FWIW, what we're doing at this point is validating integrity of wiring, armature, collector & field windings wire for any suspect conditions such as continuity, opens, shorts, resistance. This is essentially a "static" test of the wiring/components to help you make an informed decision regarding the re-assembly of your GEN. You may arrive at some point where you've had enough of it all (again, understand it's frustrating) and just want to reassemble the GEN w/ new bushing, bearing & brushes. Don't forget to clean those spaces of carbon build-up in the commutator, spray the armature, perform a good overall cleaning of everything.
A "dynamic" test would be more informative and help to illustrate the actual capabilities of the GEN - something likened to what a GEN rebuild shop would perform. However, this is more or less outside the direction of this thread since you would be measuring the GEN under load (amperage/voltage), etc. while the GEN was actually turning/operating in a "dynamic" state. Do the best you can. Good Luck!
Not a thing. I never said there was. Norm has been very patient to help this young man. We all started somewhere. For many of us, it was a long time ago. Nuff said.
I understand and trust me I’m frustrated, I’ve never understood electrical. I’m basically just trying to get the gen working and keep my bat charged. This gen won’t put out 14V ever again probably. The battery in the meter is fine but it’s been left outside many times and it’s junk. I but the bushing in cleaned commutator and new brushes and the gen works! But it still goes out. So it’s bumping around in there or something because it goes off and on some times due to RPMs. I didn’t change the front bearing yet so it may be that.
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There’s nothing wrong with that. Also remember this stuff is difficult just over text trying to understand new things. I thank you all for all the patience. I’m spending all day tomorrow on this thing again which will include the bearing as well.
I admire you pursuing the route you've chosen. Everyone has provided ample suggestions - get a rebuilt GEN, a one wire ALT, etc. You elected this route since $$ was tight. Had you deep pockets, you could easily have gone a different route. At the end of the day, you may still find you're going to need another GEN or ALT. Good Luck!
In my experience, when a bearing or bushing goes out in a generator it lets you know, rattle squeak vibration noise, no mistaking it. I wonder if what you are experiencing is the voltage regulator kicking out with a full battery, not showing a charge because it doesn't need one at this time. Just a shot in the dark from afar...Tedd
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Thank you sir! And you’re exactly right I may get another one but at least now I know how to test and rebuild a gen which I hope I don’t have to do again. And my gen is still shaking and makes noise and it’s probably that bearing! That’s exactly what I was thinking too about the VR cutting it out because my battery is over 12 v and it’s just idling using no power from accessories so I’ve been thinking that too
If the genny has been smoking it is probably damaged. The wire and brushes being not broken does not tell much. The armature and fields need to be tested for opens, shorts and grounds. Pictures of the inside would have been better than pic of the outside of the genny. You should let a professional have a look at the genny and reg together.


