Posted by pete 23 on July 13, 2011 at 19:34:04 from (74.32.234.149):
In Reply to: 685 tractor pistons posted by Albert Goerzen on July 13, 2011 at 18:31:07:
Yes, and most suppliers carry both. I would definetly go with the high comp as they were introduced for better starting and cleaner exhaust and they work well on the D-310 and D-358 from my experience but never overhauled a four cyl. Actually, If I remember right, they were introduced on the small four cyl engines first to over come complaints. You know, that eye burning exhaust. Service rep told me one time, a farmer claimed his cows were getting sick due to that as he cleaned barns with it I understand. There were other changes as well, a different injection nozzle with what is referred to as a low sac nozzle. You may want to retard inj a couple degrees and decrease max fuel adjustment also. These are simple changes to make right on outside of pump.
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