wiring problems with 743 bobcat

[Fefanatic]

Where are you getting the term "Diode Trio"? At one time (maybe still) that was a term Delco used for a smaller rectifier that powered the alternator's internal voltage-regulator. The main power rectifiers (six of them) were called the "Rectifier Bridge". This was a "10-SI Delcotron System", new stuff in 1969. As I recall, the starter on my 743 is Delco, so I wouldn't be surprised if the alternator is too. I'll be near mine later today, I may brave the mud and go take a peek... A picture of the other end of the alternator, the wiring end, may tell me more about yours.

Yes, that is a Delco alternator. It may have a one wire regulator in it. These are popular for conversions due to their versatility. Start it and check the voltage across the battery. If the alternator is good it should be putting out 13.8-14.2 volts. If the diode trio is partially damaged then the voltage will be lower but still above battery voltage. I've replaced dozens of diode trios and they are not that difficult to do. This is one of the easiest alternators to rebuild. FWIW, I seriously doubt that the alternator is the cause of your starter problems.

 

[Madbobcater743]

Yes, that is a Delco alternator. It may have a one wire regulator in it. These are popular for conversions due to their versatility. Start it and check the voltage across the battery. If the alternator is good it should be putting out 13.8-14.2 volts. If the diode trio is partially damaged then the voltage will be lower but still above battery voltage. I've replaced dozens of diode trios and they are not that difficult to do. This is one of the easiest alternators to rebuild. FWIW, I seriously doubt that the alternator is the cause of your starter problems.

Thanks for the info. fefanatic- I Hijacked this thread to talk about my altenator and what type it is. It hasn't presented a problem to me yet but i'll be patient. Ill check my manuals for the specs on the delco. I'm reading all types of specs for different models. Not sure what model bobcat mine is. I'm going to go with 15000 + looking at the specs of the hydraulic pump coming in at a right angle.

 

[billrbg]

Thanks for the info. fefanatic- I Hijacked this thread to talk about my altenator and what type it is. It hasn't presented a problem to me yet but i'll be patient. Ill check my manuals for the specs on the delco. I'm reading all types of specs for different models. Not sure what model bobcat mine is. I'm going to go with 15000 + looking at the specs of the hydraulic pump coming in at a right angle.

***"I'm excited to see the pictures in all honesty . My 743's wiring is hanging by a thread. I know I'll be in it before the winter. Hour meter seized, no fuse I could keep going. Pictures help by so much its not even funny. Hows that saying goes?"*** There is no hint there that you had a starting or alternator problem. Really, starting a new thread would be better for us all. I'm afraid Supernice's thread is going to wander in the weeds if we discuss your problem in the same thread. Follow along, of course, but let's discuss your's separately.

 

[Madbobcater743]

***"I'm excited to see the pictures in all honesty . My 743's wiring is hanging by a thread. I know I'll be in it before the winter. Hour meter seized, no fuse I could keep going. Pictures help by so much its not even funny. Hows that saying goes?"*** There is no hint there that you had a starting or alternator problem. Really, starting a new thread would be better for us all. I'm afraid Supernice's thread is going to wander in the weeds if we discuss your problem in the same thread. Follow along, of course, but let's discuss your's separately.

Sorry man. My bobcat's at the shop. I kind of have a jones to learn more about it. At the rate we are going here this guy might be able to produce a picture before the New year if we are lucky. Just thought I would ask a few questions about a similar machine. I surely will hit the books harder, make a thread. Cheers.

 

[superniceguy5687]

Yes, that is a Delco alternator. It may have a one wire regulator in it. These are popular for conversions due to their versatility. Start it and check the voltage across the battery. If the alternator is good it should be putting out 13.8-14.2 volts. If the diode trio is partially damaged then the voltage will be lower but still above battery voltage. I've replaced dozens of diode trios and they are not that difficult to do. This is one of the easiest alternators to rebuild. FWIW, I seriously doubt that the alternator is the cause of your starter problems.

I will agree with that one. Looks identical to mine it is a Delco. Billrbg just to let you know started a new thread. Figured with my page three starting I would start fresh per se. I left some info in that one for you. Don't give up on me yet? Please. I will get the pics. Let me know what you think of the orange wire idea in the new thread Thx ,superniceguy

 

[superniceguy5687]

I will agree with that one. Looks identical to mine it is a Delco. Billrbg just to let you know started a new thread. Figured with my page three starting I would start fresh per se. I left some info in that one for you. Don't give up on me yet? Please. I will get the pics. Let me know what you think of the orange wire idea in the new thread Thx ,superniceguy

Madbobcater:- I don't mind if you jump in as long as Billrbg doesn't get us mixed up with each other. When I said in my earlier post, about agreeing with...... I was saying that with regards to your alternator not directed at you personally. Do you have any pictures of your wiring harness connections on your 743 on here? Would you be able to post some. I really have to get my pictures on here but with working the way I do time is go go go.

 

[Madbobcater743]

Madbobcater:- I don't mind if you jump in as long as Billrbg doesn't get us mixed up with each other. When I said in my earlier post, about agreeing with...... I was saying that with regards to your alternator not directed at you personally. Do you have any pictures of your wiring harness connections on your 743 on here? Would you be able to post some. I really have to get my pictures on here but with working the way I do time is go go go.

As we used to say on the phish lot. " Sweet pics brah" - merry xmass

 

[jeff412562005]

My dad has an early 90's 753 bobcat skid steer with diesel engine and it caught fire. The fuel cutoff solenoid/timer caused it because he put off changing the solenoid, it had been acting up for more than a year. It didn't hurt anything except melted the connector from the solenoid/timer to the main harness and the 3 wires going to the solenoid/timer so far back in the wiring harness. Instead of buying whole wiring harness we just want to repair the 3 wires that are melted and connect them to the 3 wires coming from the new solenoid/timer. My question is the wire that and looks like it runs down to the bottom of the engine was soldered to a blue stripped wire that is putting out voltage. He tried to tell me that the wire that was connected to the blue striped wire was going to a ground. I know that isn't possible and he does too but is getting older and recently had a stroke. Im away at work and can't look at it in person so I hope somebody here can tell me what he is seeing. He put a new solenoid and timer on it and wants to hook it up and know its right before hooking up the battery and possibly doing worse damage. I couldn't find a wiring diagram for his particular machine, and all the ones I looked at that was close the colors of the wires were showed as different than on his machine and didn't show any of the 3 wires connected to one another, he sent me a picture of the mess and the coating was burnt off the wires but one of the wires was for sure soldered to a blue and had a little metal prong where they were connected. This connection was less that 18 inches from the plug going to the timer. His machine was bought new and the wiring has never been altered. Please somebody tell me what is going on, and where the wires go, the solenoid and timer he bought cost him around 300 dollars and I want to help him get it fixed back right.

 

[billrbg]

My dad has an early 90's 753 bobcat skid steer with diesel engine and it caught fire. The fuel cutoff solenoid/timer caused it because he put off changing the solenoid, it had been acting up for more than a year. It didn't hurt anything except melted the connector from the solenoid/timer to the main harness and the 3 wires going to the solenoid/timer so far back in the wiring harness. Instead of buying whole wiring harness we just want to repair the 3 wires that are melted and connect them to the 3 wires coming from the new solenoid/timer. My question is the wire that and looks like it runs down to the bottom of the engine was soldered to a blue stripped wire that is putting out voltage. He tried to tell me that the wire that was connected to the blue striped wire was going to a ground. I know that isn't possible and he does too but is getting older and recently had a stroke. Im away at work and can't look at it in person so I hope somebody here can tell me what he is seeing. He put a new solenoid and timer on it and wants to hook it up and know its right before hooking up the battery and possibly doing worse damage. I couldn't find a wiring diagram for his particular machine, and all the ones I looked at that was close the colors of the wires were showed as different than on his machine and didn't show any of the 3 wires connected to one another, he sent me a picture of the mess and the coating was burnt off the wires but one of the wires was for sure soldered to a blue and had a little metal prong where they were connected. This connection was less that 18 inches from the plug going to the timer. His machine was bought new and the wiring has never been altered. Please somebody tell me what is going on, and where the wires go, the solenoid and timer he bought cost him around 300 dollars and I want to help him get it fixed back right.

Wow, yet another level of confusion for this poor thread! Jeff, confirm that you are working with a 753, not a 743. Regardless, starting a new thread for your different problems (and type machine) would probably serve you better. If it really is a 753, I can't help; I only have schematics for the 743.