the three missing caps are from the combustion chamber, that version of the perkins had flat top pistons the later 152 in the 135 had the combustion chanber machined into the top of the piston, if you look into them you should be able to see the tip of the injector,there is only two exhaust ports on both versions of the 152.hope this helps,tom
This post was edited by casestudy at 15:17:13 04/07/10.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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