Al Negstad
New User
The anemometer on my WD-45 seems to register backwards...the faster the engine runs the farther toward discharge the meter shows. What's up?
- Thread starter Al Negstad
- Start date
First and simple. With your tractor OFF. Watch the meter and turn on your headlights. If the needle goes to minus...things are wired correctly. With the tractor running after the first test and the meter goes negative it sound like the generator has lost polarity. Try the first test and let us know so we can follow up with more tests and answers. Jeffcat
Steve@Advance
Well-known Member
First, I seriously doubt your WD has an aneomometer! LOL
But let's assume you're asking about the amp meter...
First thing to do is test the charging system with a volt meter to see if it is charging, and how much it is charging. If it is still 6 volt, with the engine RPM around 1500 or so, the voltage should be around 7.5 to 8.5 volts. If it has been converted to 12 volt, it should be about 13.5 to 15 volts.
Not being there to actually see what the amp meter is doing makes this a little hard to determine. But if the volt meter determines the system is properly charging, the simple diagnosis is the leads on the back of the amp meter need to be reversed. If the tractor has been converted from positive ground to negative ground, this has to be done for the meter to read properly.
If the volt meter determines the system is not charging or under charging, the problem could be a loose belt, or an internal short in the generator.
If the volt meter determines the system is over charging, the problem could be a defective regulator, poor regulator ground, or shorted wiring.
But let's assume you're asking about the amp meter...
First thing to do is test the charging system with a volt meter to see if it is charging, and how much it is charging. If it is still 6 volt, with the engine RPM around 1500 or so, the voltage should be around 7.5 to 8.5 volts. If it has been converted to 12 volt, it should be about 13.5 to 15 volts.
Not being there to actually see what the amp meter is doing makes this a little hard to determine. But if the volt meter determines the system is properly charging, the simple diagnosis is the leads on the back of the amp meter need to be reversed. If the tractor has been converted from positive ground to negative ground, this has to be done for the meter to read properly.
If the volt meter determines the system is not charging or under charging, the problem could be a loose belt, or an internal short in the generator.
If the volt meter determines the system is over charging, the problem could be a defective regulator, poor regulator ground, or shorted wiring.
Al........I always thought an Anemometer was one of those 3-cup wind speed thingys.
It turns out yer actually talkin' about an AMP-meter. Sumptin' that measures electrons that charge-discharge yer lead acid battery. Surprizingly enuff, the FASTER yer GENERATOR turns, the MORE AMPS it putts outt. This is NORMAL. Some tractors require the OPERATOR to regulate the generator output, others have automatic regulators.
Yer BelchFire-V8 has an automatic regulator built into its alternator and it shows you when it discharges by lighting a RED idiot lite on yer dashboard.
As explained, you've probably gottchur ammeter 2-terminals bassackwards. Just reverse them, engine OFF. Use CAUTION so none of the metal parts of the wiring touches tractor metal ...or... you'll haffa personal in-the-face demonstration of ARC-welding. ........electrical Dell
It turns out yer actually talkin' about an AMP-meter. Sumptin' that measures electrons that charge-discharge yer lead acid battery. Surprizingly enuff, the FASTER yer GENERATOR turns, the MORE AMPS it putts outt. This is NORMAL. Some tractors require the OPERATOR to regulate the generator output, others have automatic regulators.
Yer BelchFire-V8 has an automatic regulator built into its alternator and it shows you when it discharges by lighting a RED idiot lite on yer dashboard.
As explained, you've probably gottchur ammeter 2-terminals bassackwards. Just reverse them, engine OFF. Use CAUTION so none of the metal parts of the wiring touches tractor metal ...or... you'll haffa personal in-the-face demonstration of ARC-welding. ........electrical Dell
chucksoliver77
Well-known Member
you may have the battery cables reversed. Chuck
gene bender
Well-known Member
first thing to do is polarize the generator. Use a jumper one end to the batt terminal on the reg then just briefely touch the A terminal on the generator. That should produce a flash. Which terminal on the batt is ground and are you still 6v or 12v dont be afraid to get some help from someone who knows the charging system on your tractor. First i would ploarize the gen you dont want the engine running when doing the polarizing
buickanddeere
Well-known Member
Had me fooled for a while too. Why would a WD45 be doing measuring atmospheric air ?
Odds are somebody ran the battery dead then the tractor was jump started with the booster cables azz backwards. Not too many folk are familiar with th old positive ground/chassis equipment.
Using a multimeter measure the battery voltage and polarity.
Al Negstad
New User
Ah, the joys of spell check without proofreading
. I do think that the generator is charging
but the meter wires are reversed. The lights
don't work and there are no other electrical
applications on the tractor. Does it matter if it
registers in reverse?
. I do think that the generator is charging but the meter wires are reversed. The lights
don't work and there are no other electrical
applications on the tractor. Does it matter if it
registers in reverse?
Texasmark1
Well-known Member
Butting in: No, as long as the battery is being charged, not discharged.
Similar threads
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy