Perhaps the fact that the 6-71 was produced in much greater numbers and had a longer production run should tell something? I know one of the first guys to run hydraulic excavators for pipeline. Had 5 P&H H418 hoes and 1 1250(upgraded 418). They all had 6-53's in them. Major overhaul at 3000 hours. He also had experience with 6-71's and knew a lot people in the construction business who all said the same thing. He also said the 3208 Cat was OK in a truck application but a bad choice to put in an excavator. That would explain why Cat 225's were never as common as 235's and 245's. It's also generally agreed that the inline 6-71's are better than than the V6 models. The 8-92's weren't the best Detroit engines either. The Silver 92's were better but still not considered as reliable as the 71's. The 6-71 is a good work horse and so is the 12-71. I think the 8-71 is pretty good too but not quite as much.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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