Re: My 8N Tractor In AD

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Posted by SelectOSpeed on November 16, 2017 at 08:19:48 [URL] [DELETE] :

In Reply to: Re: My 8N Tractor In AD posted by Larry on November 16, 2017 at 07:05:27:

Larry, the early SOS transmission Was problematic, but like GP stated, FoMoCo immediately addressed the problems with the goal of total satisfaction to the dealers and owners. Out of many problem areas in the early units, one of them was the input shaft bearing in the pump cover was too small and couldn't stand up to the loads imposed on it. The bearing would fail, grind itself up, and send metal shavings all through the hydraulic and mechanical circuits. A service campaign to correct that particular problem involved removal of the trans front cover, ( Ford nomenclature was Pump Adapter Plate) boring the plate for a larger bearing, and installation of a larger bearing accommodating input shaft. Another upgrade was the replacement of the One Way Sprag Type Clutch with a Overrunning Roller Type Clutch. This unit provided the Direct Drive Speeds of the trans. The Sprag Clutch was prone to failure in early units. It is located directly behind the Pump Adapter Plate, so it usually was replaced during the Bearing replacement. As stated by Kirk, A Hydraulic Direct Drive Clutch replaced the Roller Clutch in the later 63/64 2000/4000 series. It is interesting that the Ford 6000 Tractor that was introduced in late 1960 as a 61 model, had the Direct Drive Clutch installed. The higher horsepower and increased load capacity of the 6000 necessitated that change. The 601 to 901 series continued with the Roller type until 1963. It should be noted that the Ford 6000 SOS transmission was the same unit as was utilized in the smaller tractors as well as the 1801 Industrial series, with two notable differences. The 6000 had its Final Reduction Gear at the Rear Axles. The 601-4000 series Final Reduction Gear was in the rear of the transmission case. The 6000 was also fitted with a transmission Cooler system. Other than that they are the same. SoS


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