Re: Gas-additive question

Posted by The tractor vet on September 27, 2013 at 22:13:16 from (75.19.125.100):

In Reply to: Gas-additive question posted by Kirk Affeldt on September 27, 2013 at 18:33:37:

One the 34089 will work fine as that is what was needed for that sires same as in 460-560 UNLESS like on a lot of 560's that were upgraded to 706 C263 pistons then ya needed to go to the higher. The old M- 450 will get by on 87 but here again depending on WHAT pistons were used . On my S/MTA i can get by with 87 as it had M&W 4 1/8th flat tops , my buddy's S/MTA with the 4 1/8th 8500 ft. high alt. pistons and a 450 gas head that one needs the 93 , What people forget that back in the 60's reg gas was 95 octane and hightest was 105 octane and FARM gas was guess what 93 same as the good old fashioned GULF TANE that was three cents a gallon less then reg. at the rest of the stations , down side of the old 93 gas was that even the OLD 6 cylinder Chebby pick ups would rattle and ping on it . the 93 octane is the MIN octane for the 06-56 gas tractors and when they nolonger made gas tractors people started to forget , then along came unleaded gas and lower compression cars and trucks and down went the octane around 76 is when all cars and light trucks were all unleaded and on into the 80's compression ratio's went down and so did the octane . The 87 octane burns much hotter then the 93 also. I had a old Massey 300 combine with the 225 slant six and i was having a problem with it running hot so i did the usual new water pump , new T stat pulled the rad and had it cleaned and rodded out checked ing. timing did it all . Still ran HOT Then i bought some gas out in In. that was FARM gas as i was coming home from a equipment sale and i had bought two 105 gallon pick up tanks at the sale and had them on the back of my truck and gas in Hoosier land was twenty cents a gallon less then here it was a 92 octane and i put that in the combine and instead of the temp gauge setting at 210 now it was running at 180-190 . When that gas was gone i put the 93 in it and same results . I have always run the hightest in my gas tractors as that is what i ran in my pickups and never had a problem and never gave it much thought as when i was going to farm i would fill the truck then fill the tank at the same time with the same gas . Not till i had and engine go down that i had rebuilt did this come to mind about the gas till i saw the damage and i knew it was a fuel related failure . At the same time this happened i had just bought two 706 at a sale and the owner of the one came up to me and gave me the org. operators manual . In all the tractors i have owned bought and sold i never had and operators manual before and i sat down and read it and in the back under FUEL it stated that the Min. Fuel req, for a 06 was 93 in the research met. I showed this to the customer who is also my personal friend and that is when we had his fuel tested at a lab in Columbus Ohio and the gas that was brought to the farm was 87 octane laced with MTB and the people at the lab also said that this was the cause for the melt down . One other thing here back when these OLD tractors were new they had FORGED pistons in them , now today the rebuild kits come with a CAST piston . a CAST piston can not and will not shed the heat like a FORGED piston will and they are not as tough . So for all the tractors in the gas end that were built in the sixtys to the mid 70's they were the HIGH COMPRESSION engines and were high RPM . There is a world of difference between a working engine in gas then the one in your car or pick up .I will say it again IF you use as much gas as we do thru our tractors it will cost you around 80 -100 buck a year more over the 87 and that amount over will not buy one piston or the gskt. to replace just on smoked piston . Same as usen the low ash engine oil yep Case I H is real proud of that OIL BUT you will not eat exhaust valves . I have also found that we have longer plug life and we can get thru a lot of acres to the tank of fuel . I bought gas powered because they were cheap and i did not have a lot of money to get what i really wanted . Back then sure i wanted atleast a 806 diesel but they were 5-6000 bucks i could buy a have decent looking 706 gasser out of the dead row for 750-950 bucks and usually once home two to three hundred bucks it was up and running. Yep i wanted a Massey 550 combine , they were 7-10000 i settled for a Massey 300 for 650 added a cab for a 150 added lights and a alt. for 100 and a two row corn head for 7.50 yep bought a two row corn head for seven dollars and fifty cents . Go ahead and laugh that little 300 Massey 225 slant six gasser made me over 26000 dollars doing custom combining for small guys and when i sold it the buyer set the price as he said he would give me 2850 bucks and he had CASH , but i made him wait till i was done doing wheat for a guy . I do know my gassers and what does work when you WORK them . For the most part most of you just play and never made your living farming with them or repairing them where i have . Go ahead and laugh at me but i am here to tell ya i know far more about them then maybe three other guys on here . Remember YOUR THE ONE's Asking for the HELP .

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