Charging System Help

GardinBuggy · 02-27-2010, 09:16 PM

I have an old Taylor Dunn with a Yamaha engine, equivelent to a G1. I have read through the forums and seen the many diagnoses of a Voltage Regulator when the generator does not charge, but changing the VR has not fixed my problem. Here are the details:

1. With a voltmeter I see only 12.7ish voltage at full throttle.
2. Tried grounding the field input on the generator, doesn't change anything.
3. Have put 3 different generators on the unit (all new), still no change.
4. Have adapted a 3 wire VR that is manually set, still no change.
5. Have verified the engine is turning 2500 RPM's with a photoelectric tach, nothing.
6. If I reach down and grab the butterfly on the carb by hand and over-rev the engine with ANY of the above changes, it charges correctly.

I posted this here in the Yamaha section because even in the T/D service manual there are diagrams taken straight out of the Yamaha G1 service manual.

I have 4 different carts, all T/D's, that are presenting the same/similar problem(s) and I am going crazy trying to figure this out! I should note that the generators we have are not Hitachi's but some generic knock off's that I have no control over.

Any ideas?

DOOmsman · 02-27-2010, 09:23 PM

Not to savey here but what do the belts look like? Could they be worn and slipping before the high RPMs

GardinBuggy · 02-27-2010, 09:28 PM

Belts are both in above average shape, not new....

Also, a G-9 schematic has the same VR that is on this unit.

DOOmsman · 02-27-2010, 09:35 PM

Are the belts tight? It is odd that it is rpm related electronics are on or off in my exp.

GardinBuggy · 02-27-2010, 09:39 PM

Yes, the generator belt is tight.

DOOmsman · 02-27-2010, 09:41 PM

4 different carts, all T/D's, that are presenting the same/similar problem(s) a

Check VOM to anougther one

GardinBuggy · 02-27-2010, 09:43 PM

Quote:

Originally Posted by DOOmsman

4 different carts, all T/D's, that are presenting the same/similar problem(s) a

Check VOM to anougther one

Sorry for my NOOB-ness... VOM?

breugel · 02-27-2010, 09:46 PM

Quote:

Originally Posted by GardinBuggy

Sorry for my NOOB-ness... VOM?

Voltage Ohm Meter

Voltmeter...

GardinBuggy · 02-27-2010, 09:48 PM

Thanks for that....

None of them can keep the battery charged. I send them out, and within a week I have them back for a dead battery, because they aren't charging. They all have different readings, but none of them above 13 volts.

DOOmsman · 02-27-2010, 09:52 PM

I send them out,

What were is out? Put put stop, put put stop will not charge a battery.

02-27-2010, 09:16 PM	#1
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9	Charging System Help I have an old Taylor Dunn with a Yamaha engine, equivelent to a G1. I have read through the forums and seen the many diagnoses of a Voltage Regulator when the generator does not charge, but changing the VR has not fixed my problem. Here are the details: 1. With a voltmeter I see only 12.7ish voltage at full throttle. 2. Tried grounding the field input on the generator, doesn't change anything. 3. Have put 3 different generators on the unit (all new), still no change. 4. Have adapted a 3 wire VR that is manually set, still no change. 5. Have verified the engine is turning 2500 RPM's with a photoelectric tach, nothing. 6. If I reach down and grab the butterfly on the carb by hand and over-rev the engine with ANY of the above changes, it charges correctly. I posted this here in the Yamaha section because even in the T/D service manual there are diagrams taken straight out of the Yamaha G1 service manual. I have 4 different carts, all T/D's, that are presenting the same/similar problem(s) and I am going crazy trying to figure this out! I should note that the generators we have are not Hitachi's but some generic knock off's that I have no control over. Any ideas?
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9

02-27-2010, 09:23 PM	#2
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Charging System Help Not to savey here but what do the belts look like? Could they be worn and slipping before the high RPMs

02-27-2010, 09:28 PM	#3
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9	Re: Charging System Help Belts are both in above average shape, not new.... Also, a G-9 schematic has the same VR that is on this unit.
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9

02-27-2010, 09:35 PM	#4
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Charging System Help Are the belts tight? It is odd that it is rpm related electronics are on or off in my exp.

02-27-2010, 09:39 PM	#5
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9	Re: Charging System Help Yes, the generator belt is tight.
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9

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02-27-2010, 09:41 PM	#6
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Charging System Help 4 different carts, all T/D's, that are presenting the same/similar problem(s) a Check VOM to anougther one

02-27-2010, 09:48 PM	#9
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9	Re: Charging System Help Thanks for that.... None of them can keep the battery charged. I send them out, and within a week I have them back for a dead battery, because they aren't charging. They all have different readings, but none of them above 13 volts.
GardinBuggy Not Yet Wild Join Date: Feb 2010 Posts: 9

02-27-2010, 09:52 PM	#10
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Charging System Help I send them out, What were is out? Put put stop, put put stop will not charge a battery.

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