Glad you found it. The SP on the end means Special. Now what is special about it I likely couldn't tell you. Caterpillar stamped SP if something was different from the basic build. For example I had a D4 Traxcavator serial 7U prefix that had SP on it. Before Cat bought Traxcavator they would sell dozers to Traxcavator or to the dealers and they would fit them with the loader. The Traxcavator model had a longer undercarriage than a standard D4, hence the SP for Special on the Serial tag.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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