The wire to the generator from the voltage regulator that carries the power from the battery has burned out. Fortunately nothing caught fire. The generator has not been working for a while and I have been charging the battery. The heat seems to have been greater near the generator. It's easy to rewire. I need to strip the generator. What sort of fault would cause a fire? The 6945 had an alternator. Would one fit straight onto a 6745?
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6745 wiring fire
- Thread starter corundal
- Start date
- Joined
- Sep 5, 2006
- Messages
- 212
- First name
- Bjarne
Machinery:
4911
Hi
The reason things started to burn is possible the old dynamo has shorted. personly i wold haw trown it avay and installed an altenator, you can mount the braket of a series 9 or later or you will have to modify the one you have. then get yourself a alternator with bilt in regulator, the bosc from VW`s or opel`s fit straigt on but thei nead new pulli, i beleve there are aftermarked that will fit and have the coreckt pulli, then you only nead one wire from the dashbord ligt to the manetishing terminal and one heawy wire to the bateri terminal on the starter.
Bjarne
The reason things started to burn is possible the old dynamo has shorted. personly i wold haw trown it avay and installed an altenator, you can mount the braket of a series 9 or later or you will have to modify the one you have. then get yourself a alternator with bilt in regulator, the bosc from VW`s or opel`s fit straigt on but thei nead new pulli, i beleve there are aftermarked that will fit and have the coreckt pulli, then you only nead one wire from the dashbord ligt to the manetishing terminal and one heawy wire to the bateri terminal on the starter.
Bjarne
- Joined
- Jul 5, 2003
- Messages
- 4,021
- Location
- Laag Zuthem
- First name
- Renze
Machinery:
1976 5718
1978 5718 35kmh: Work in progress
1967 3011
Dont forget to throw away the external voltage regulator because an alternator would have one built in. Also the dash light needs to be connected, the resistance of the lightbulb is required to make the system work.
- Joined
- Jul 5, 2003
- Messages
- 4,021
- Location
- Laag Zuthem
- First name
- Renze
Machinery:
1976 5718
1978 5718 35kmh: Work in progress
1967 3011
It just needs resistance. Dont know enough about electricity to tell if resistance changes with wattage
go to a scrap yard find an alternator with a single vee pulley , old fords cortinas , escort , transit used to do the job,, but some more modern small cars still use single vee belts. corsa? modifying the bracket is simple metal work... if you get the bracket with the alternator its only fixing the bracket to the tractor , easier than trying to fit the alternator to the existing zetor bracket.
the existing in dash bulb is fine... you need volts from the battery through the ignition switch to the little terminal on the alternator, this wakes the alternator up , when it starts charging and sending volts back up to the bulb , the light goes out cos its got the same volts on both sides of it. and the thick wire from the big alternator terminal to the battery , often run to the battery lead on the starter solenoid.
ive done all three of mine , a crystal and two little uns
the existing in dash bulb is fine... you need volts from the battery through the ignition switch to the little terminal on the alternator, this wakes the alternator up , when it starts charging and sending volts back up to the bulb , the light goes out cos its got the same volts on both sides of it. and the thick wire from the big alternator terminal to the battery , often run to the battery lead on the starter solenoid.
ive done all three of mine , a crystal and two little uns
- Joined
- Dec 8, 2006
- Messages
- 628
- First name
- Dave P
No, ammeter goes in the line from the large terminal to the battery. Other line, again from the battery, goes through the key, across any bulb and then to either of the smaller terminals on the alternator. this is for a Lucas type Alternator. You don't necessarily have to fit a bulb, but its a good reminder to turn the key off when you leave the tractor otherwise the alternator will run the battery down.
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