Posted by Hugh MacKay on August 07, 2008 at 16:47:46 from (209.226.106.86):
My Farmall 130 has been converted to 12 volt alternator, and with few exceptions it has worked well for 15 years. This is a Delco very simple arrangement with a push button to excite the alternator after tractor starts.
Back in Jan., I bought a new factory type starter switch from CaseIH. In May that starter switch stuck, not enough to turn starter, but it was making contact. At the end of the day I started the tractor, moved it 10', and shut it off. I started for the house, and remembered an item I wanted from the tool box. As I approached the tractor I could hear bubbling like a boiling, and could smell a sulphur smell. Quickly I discovered the stuck starter switch, and uncoupled the ground cable. I figured both starter and battery would be cooked. I got some penetrating oil sprayed up around starter switch, got it working free. I put the ground back on and it started. Next morning it started fine and did for next 1.5 months. The battery being 6 years old then started going dead overnight. Two weeks later it wouldn't crank the engine, which didn't surprise me given the age of the battery and what had happened.
Last week I purchased a new battery. This tractor like my SA and 140, all wired the same never crank more than 5 seconds until they are running. A push of that excite button and amp gauge jumps to 15-20 amp range then back to 0 within 30 seconds. The problem I'm having with 130 is the amp gauge indicates 15 to 20 amps after I push the excite button at beginning, quickly coming back to 10 amps and there it stays. If I don't push the botton, amp gauge will stay at 0. Could the stuck starter switch have damaged the built in regulator in the alternator, back two months ago? Could this new Delco battery not have reached full charge yet? I guess I could disconnect battery and hook up battery charger see if it shows amps being drawn. Am I missing something? I don't want to over charge this new battery. It cranks the tractor as if it's already at full charge. Your thoughts please.
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