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#1
08-07-2017, 05:32 PM
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Cub 127 newbie question
I'm new to the forum, also a proud new owner of a Cub Cadet 127. I have tried everything I can think of to get the charging system to work. Starter generator tested good. Installed new brushes bearings, voltage regulator. Cleaned the grounds. I have run out of ideas, any advice is appreciated. Thanks
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#2
08-07-2017, 05:43 PM
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Welcome to the forum!
What indication are you having the charging system isn't working? Is the amp gauge not showing a charge, or are you not getting proper voltage on the battery while running? Was the new voltage regulator verified as the proper one for the tractor? How does all the wiring look on the machine? The 6/7 series tractors are known for their insulation rotting off the wires.
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#3
08-07-2017, 06:54 PM
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Last time I started the engine the battery seemed weak, but it fired up. I checked the voltage at the battery it read 11.2 volts at full throttle. Wiring looks good. The factory volt meter slightly shows discharge when cranking but stays on 0 otherwise. The voltage regulator was advertised as the proper one for a 127, but had different terminal locations than the original one. The original v.r. was missing a set of points and had a burnt copper wire inside.
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#4
08-07-2017, 08:17 PM
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At WOT throttle, you should have about 13.7VDC at the battery....if everything is working OK.
__________________
[B]Roland Bedell[/B] CC Models: 100, 105, 1450, 782, (2) 784, & 2072 [SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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#5
08-07-2017, 08:24 PM
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Ground the f terminal on the starter generator while engine is running with a meter hooked to the battery. Voltage should peak at over 14 volts. If it does, generator is good. Don't do this for more time than necessary to measure battery volts.
Aftermarket regulators mostly have the ""G" terminal on the back side of them. Is it wired correctly?
__________________
(2) Original, 100, 102, 124, 73, 800, #1 and #2 cart, brinly plows, disk, IH184, IH244, 1948 F Cub
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#6
08-07-2017, 08:29 PM
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First, with the engine off, check the voltage on the battery terminal on the voltage regulator. It should read battery voltage. If it doesn’t, check that wire. They rot out over time.
If that’s ok, you’ve probably got either a voltage regulator problem, or a generator problem. With the engine a bit over half, check the voltage on the Armature on the generator and see what the voltage is. If it’s the right voltage (~13.7) you’ve got a problem between there and the V/R.
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#7
08-08-2017, 04:27 AM
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I went thru the troubleshooting generator check list in an old post. Set the polarity of the generator, the voltage at the battery is now 14.25 at full throttle. Is the generator supposed to charge the battery at lower a rpm? Is there a way to test/calibrate the volt meter? Thanks for the help.
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#8
08-08-2017, 06:35 AM
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Quote:
(B) Meters can be re-calibrated but it usually requires sending them into the Manufacturer. Since you have 14.0+ VDC at the battery, here are some things that would contribute to a poor charging performance: * Incorrect V/R * Improperly wired V/R * Poorly grounded V/R * Poor wiring (broken and/or high resistance) * Poor chassis grounding from battery to engine
__________________
[B]Roland Bedell[/B] CC Models: 100, 105, 1450, 782, (2) 784, & 2072 [SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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