I got my Farmall 100 that I picked up at an action this spring and have a question about the 6V system charging. Had the generator checked out at a local shop and they said it was good but needed a new regulator. Bought a regulator from the same guy and the tractor charges fine at about half throttle. At full throttle the gauge goes nuts and flutters all over the place. Was wondering if I could have a bad connection or ground problem. I haven't put a meter on it yet to see if it does the same thing. Guy sells good quality regulators. I've had him fix other generators and alternators so I know he knows what he is doing . Could it still be a regulator problem.
- Thread starter Charlie M
- Start date
Janicholson
Well-known Member
Put a non digital volt meter across the battery terminals. If it reads 14+ to 14.7 volts, all is well even though the meter is going wacky. Some meters are cheap and some are old. Either tend ot not have enough dampening on the needle movement. Try another meter. Jim
The old meter part surely could apply - it may be original to the tractor. Its also possible I had a loose wire as I was looking things over tonight the wire on the generator terminal of the regulator just fell off. Tightened it up and wanted to run the tractor as I had another issue with the carb I wanted to see if I fixed and it started smoking the fan belt when it started. I didn't get anything apart yet but I'm thinking the bearing in the fan assembly is bad as the belt slips on that pulley only. I love buying non-running project tractors - never know what mystery is next sometimes.
banjoman09
Well-known Member
Jim doesn't miss - he must have read the entry wrong. 
Janicholson
Well-known Member
OOps. 7 to 7.3 would be better. Jim
I would suspect the voltage regulator. It is pure mechanical and it is rare to find a new one that is built anywhere near as well as the original ones. I pretty much gave up using them. I had three new regulators on my TO35. Two from here. All crap with soft points that fluttered and/or stuck.
That generator is supposed to make 16-19 amps @ 6.9 to 7.1 volts at 2500 RPM.
That generator is supposed to make 16-19 amps @ 6.9 to 7.1 volts at 2500 RPM.
banjoman09
Well-known Member
6V has worked fine for me.... I like "original".
banjoman09
Well-known Member
I have never had to replace anything but the regulator- $30..... and no- I don't like spending more money.
Charlie, you ask
1) Was wondering if I could have a bad connection or ground problem.
Almost anything is possible, you might remove clean n wire brush and re attach the connections and grounds
2) "I haven't put a meter on it yet to see if it does the same thing."
If I had it I would take my old trusty ANTIQUE Simpson 260 Analog VOM and try it to see what it registers.
3) "Could it still be a regulator problem"
YES just because its new and just because a reputable sold it DONT MEAN ITS GOOD QUALITY. When looking at parts catalogs
I sometimes get the impression nowadays they make some generic or one size fits all VR's which aren't as well
specifically tailored to certain Generators but that's ONLY an impression.
Try an old fashion quality ANALOG meter n see what it registers,,,,,,,Check grounds and connections,,,,,,,Insure the gennys commutator and brushes are all good n clean with good tight brush hold down springys
John T
1) Was wondering if I could have a bad connection or ground problem.
Almost anything is possible, you might remove clean n wire brush and re attach the connections and grounds
2) "I haven't put a meter on it yet to see if it does the same thing."
If I had it I would take my old trusty ANTIQUE Simpson 260 Analog VOM and try it to see what it registers.
3) "Could it still be a regulator problem"
YES just because its new and just because a reputable sold it DONT MEAN ITS GOOD QUALITY. When looking at parts catalogs
I sometimes get the impression nowadays they make some generic or one size fits all VR's which aren't as well
specifically tailored to certain Generators but that's ONLY an impression.
Try an old fashion quality ANALOG meter n see what it registers,,,,,,,Check grounds and connections,,,,,,,Insure the gennys commutator and brushes are all good n clean with good tight brush hold down springys
John T
Well in my case a lot of the batteries I get are the cost of a core battery but I have a friend who works at a parts store and she checks there batteries and any she finds good come o me and I give her a true dead battery core.
A for repair with all the tractor I mess with many have bad generators and to replace one is 2 or 3 times that of an alternator
A for repair with all the tractor I mess with many have bad generators and to replace one is 2 or 3 times that of an alternator
Janicholson
Well-known Member
For sure. Jim
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