Agco Allis 6680 Question

Have saw some that got sea water in cables on boat over here. Replace cables.   MACK

I remember a service school on these Same built tractors. They were terrible to start in North America's cold weather. Most were bought back by AGCO and reworked at Coldwater Ohio with a bigger starter, bigger battery, which needed a bigger battery tray, and heavier cables. They couldn't, at that time, get the Italians to build them right even though AGCO owned most of the Same company. This would have been an AGCO service school I attended in about 1993 or 1994. The AGCO rep at the service school, whose name was Paul ........ I forget his last name, but he was from SE Minnesota, he had a lot of colorful language when he started talking about trying to work with those stubborn Italians. He wasn't happy.


Edited by Lonn - 28 Dec 2017 at 6:00am

SAME engines are no different than any diesel . IF one goes to any diesel in cold weather and it turns slow - it will not crank. As described above the battery cables were not heavy enough and of poor quality. Install either a 4DLT or two heavy group 24 batteries - they will fit if turned for and aft - install two grounds, one from each battery and one heavy or two positive cables to the starter. We also install a slave solenoid activated by the key switch trigger wire to get full voltage to the solenoid. I thought all the 6600's had the thermo start system like the 170AC had. Ours did..I think.. We installed a soft drop light with a rough service bulb between the injector lines and the cylinders - reinstall the chamber cover- join this with a 2 amp trickle charger and if left plugged it they will fire off on coldest day - ok maybe down to 15. The drop light bulb and trickle charger will cost less for a year than the chamber heater running one day. The last series did have a much better air heater system. (the slh same engine was susceptible to ether damage with a good starter.)   The 7600 and 4650 and 4660 had a retard knob on the pump rack - we told every one just to tie it up for the winter for feeding - it does by pass the max fuel stop and then will go into retard if pulled hard. Anyway they were very difficult to start w/p popping the button.