gwest_ca-(File Mod) 11,561 #1 Posted July 30, 2020 Need some advice. The early 300-Series Kohler single cylinder wiring diagrams have mixed up the labels for the charge/rectifier wire and the accessory wire. If the R was grounded when shut OFF would there not be a short as the engine rolled to a stop? They show the R wire on the A ignition switch terminal. This mistake carries over to the detailed circuit diagrams as well. Charge wire goes to the A terminal which is shorted to Ground when shut off. I think the two X labels should be reversed. Comments Garry 1 Share this post Link to post Share on other sites
oldredrider 2,553 #2 Posted July 30, 2020 100% agree. If I were to wire that machine, I would reverse those leads. Only makes sense. 1 Share this post Link to post Share on other sites
JoeM 8,495 #3 Posted July 30, 2020 Garry if it was a new machine I would say it is right. The newer machines used the alternator as a engine brake under an emergency stop situation. Has someone had an issue with the wiring shown on the print? I attached a New Cub diagram that shows the switch wired the same. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,561 #4 Posted July 30, 2020 I can see the Case working. The same M and A1 are grounded when OFF but their alternator DC+ output is connected to the Battery+ and not switched. WH has the alternator DC+ connected to the A terminal and then grounds M and A in OFF. The stator output is not going to stop until the engine quits turning. To me that is a dead short. What am I missing? Garry Share this post Link to post Share on other sites
Tractorhead 9,212 #5 Posted July 30, 2020 (edited) 7 hours ago, gwest_ca said: Need some advice. The early 300-Series Kohler single cylinder wiring diagrams have mixed up the labels for the charge/rectifier wire and the accessory wire. If the R was grounded when shut OFF would there not be a short as the engine rolled to a stop? They show the R wire on the A ignition switch terminal. This mistake carries over to the detailed circuit diagrams as well. Charge wire goes to the A terminal which is shorted to Ground when shut off. I think the two X labels should be reversed. Comments Garry As it looks to me in the upper schematics, they switch the Regulator B+ in off position hard directly to ground. in first case of a defect regulator it canot drop the battery while key in off position and regulator is released from battery. i can imagine that they will use the DC Coils as a electric Brake to fastened stop the Engine, because the Rectifier set the coil under full Load on ground while switch the Key to off position. But for the regulator that is a Stress Situation i wouldn‘t like to deal with. If i must rewire that Machine, i would take the regulator out B+ to the Accessories Terminal provided with Light bulbs. So the Bulbs act as a defined load connected to the rectifier and give it a preloaded shutdown but with a known resistance. The end of the Regulator wasn‘t free but the Regulator wasn‘t stressed electrically that much as it was, if its switched directly to ground. In the lower Pict they just leave the output of the regulator open, what can cause a damage in the regulator Depending on what kind of regulator you use. Edited July 30, 2020 by Tractorhead Share this post Link to post Share on other sites
JoeM 8,495 #6 Posted July 30, 2020 12 minutes ago, Tractorhead said: regulator that is a Stress Situation I agree, on the AC side the field would collapse quickly. There is no good reason to ground that DC side. Direct it back to e battery and open in the off position. 1 Share this post Link to post Share on other sites
953 nut 60,705 #7 Posted July 30, 2020 The R/R unit will not produce DC voltage unless it has a 12 Volt DC source connected to it. When the key switch is in the off position the battery is no longer connected. I don't see a problem. Share this post Link to post Share on other sites
