My Case VAC won't start. It was converted to 12 volt several years ago. It started and ran fine about three weeks ago, but now makes no attempt to fire at all. I have current from the switch into the Coil. I have current from the Coil to the Distributor cap on both the coil wire and the wire that leads to the points. I can see no sparking on the points at all. I filed the points with an emery board, but still have no sparking at all across the points. Is this indicative of bad points or bad condenser? Or could the coil be bad even though I am getting current through it to the distributor cap.
- Thread starter DRussell
- Start date
guido
Well-known Member
Hello drussell,
Easy enough to check the condenser. With a volt meter set in tbe Ohm's range, see if you can get a reading. Go through each range, and reverse the leads too. If I recall correctly it should show a reading, if good, towards the lowest 2 ranges. But don'stop there, go through all of them. No reading if it is open,
Guido.
Easy enough to check the condenser. With a volt meter set in tbe Ohm's range, see if you can get a reading. Go through each range, and reverse the leads too. If I recall correctly it should show a reading, if good, towards the lowest 2 ranges. But don'stop there, go through all of them. No reading if it is open,
Guido.
Steve@Advance
Well-known Member
The wire from the - coil terminal to the points, with the points closed, it should drop to 0 volts, and the wier from the switch to the + terminal of the coil should stay near battery volts, or drop to around 8 volts if there is a resistor.
If the - terminal volts do not drop to 0, the points are not making contact, the wire from the coil to the points is open, or the distributor housing/breaker plate has lost it's ground.
If the volts to the + terminal drop to below 9 volts, (or 5 volts with a resistor) with the points closed, there is a problem with power to the coil. Check the ignition switch, connections to the switch, wiring between the switch and coil.
If the - terminal volts do not drop to 0, the points are not making contact, the wire from the coil to the points is open, or the distributor housing/breaker plate has lost it's ground.
If the volts to the + terminal drop to below 9 volts, (or 5 volts with a resistor) with the points closed, there is a problem with power to the coil. Check the ignition switch, connections to the switch, wiring between the switch and coil.
old
Well-known Member
- Location
- Camdenton Missouri
Emery board works ok if you then go back and use a piece of card board like box the points came in to clean off he grit the emery board leaves behind. One simple no brain way of testing it the points are making good contact is run a hot wire from the ignition side of the battery to the coil touch the wire to the ignition side of the coil and then back off. Each time you do that you should see a small spark and when you pull it back off if your holding the center wire from the cap close to the block you should see a good blue/white spark that jumps a 1/4 inch or more. NO spark means the points are not conducting power
Instead of guessing at the cause of no spark or throwing parts at it if you work through my Ignition Troubleshooting procedure linked below it can help find the problem...?..
John T
John Ts Ignition Troubleshooting
John T
John Ts Ignition Troubleshooting
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