Are the New Pistons Aluminum? I have rebuilt several two cylinder tractors having the blocks bored and installing new pistons. The specs for aluminum pistons are different than the original cast pistons. The aluminum pistons typically require 0.012 -0.015 clearance while the original cast pistons only required 0.008 - 0.009. When the tractor starts to heat up the pistons enlarge greater, being aluminum. One parts provider I have used for many years stated he was aware of cases were the aluminum pistons ceased to the cylinder walls and locked the engine down. He gave fare warning on the first set of aluminum pistons I purchased from him. If you like you can contact me (Bruce) at 864-933-5073
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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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