Hey Old Piston ring end-gap positioning is determined by the piston design.One piece aluminum piston ring gap should be 120 Degrees apart.On a 2 piece cross head piston like the one used for the Detroit Diesel series 50 and 60 180 degrees apart 1st and 3dr ring.On a two cycle Detroit Ddiesel you fallow the direction that come with the pack. There are 3 top rings 120 degrees apart. They have 4 oil controll rings with 2 expanders, and the expanders are color coded for the application,city bus, on highway etc.the color determines the expander's tension.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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