Posted by The tractor vet on January 01, 2016 at 15:05:31 from (104.179.81.68):
In Reply to: defective sleeves posted by jay Liedman on January 01, 2016 at 11:13:38:
well he may vary well be a good wrench , BUT like anything You can not be the expert on them unless you only work on them all the time . Those sleeves are NOT a hand fit or hand press in they have to press in with and exact fit . Now when this is done wright and everything goes wright , then you FIT each piston to the HOLE . The pistons ARE NOT all the same size . Also you must check for wrinkling of the sleeve . So yo had best have a really good bore gauge and use it along with a good set of mic.s and a ridged hone to make things JUST WRIGHT . Next on the C291 engine is ing timing . Timing has to be set at (OH WOW brain went dead here ) it is either 18 or 19 degrees BEFORE TDC at full throttle . I am not running out to the truck to look at the books in my slippers . Must have been tomuch C/R lastnight . Anyway the next thing is you HAVE to run a min. of 93 octane gas in them . Now that has become a problem now as we now can not get 93 and best we get now is 90 and once again i now have two 706's down with C291's with toasted pistons . No we have not plowed - disced - Chopped - or even ground feed with them Yes one was used to pull a load of silage out of the field and down the road , no that tractor should have never been hooked to the silage wagon going down our back roads because even the 1066 can be brought her knees pullen a full wagon . But back to your problem If your wrench does not have the OTC hyd sleeve remover installer then i can only guess on how he installed them can he vary well could have cracked them as he was putting them in . SOOOOOOOOO since you are going to have to do this all over again , the way i remove them is with a BORING bar till they are paper thin and peal them out . Then you had best put the inside mic.'s to the block and see what your working with . If it is on the vary loose side then Huston you have a problem and you will never hold a sleeve If you are CHEAP and running the cheapest gas you can find then you will not hold a sleeve or pistons in it . These pistons that we now get are not Forged Pistons like what came in that engine when it was new , what they use now are CHEAP CLEVITE CAST pistons and they swell big time when they get hot , they can not transfer the heat from the top down to the skirt and side of the piston to the cylinder walls and to the water jacket . Now If the block checks out good for a good tight fit then here is a way to install the sleeves . Warm up the block to like 180-200 degrees place the sleeves in a freezer overnight along with two pair of pliers . Place the block close to the freezer and keep it warm . You have to be fast and have a good oak 4x4 and a dead blow mallet ready . JUST INCASE . They should go in fast and set . Once you have them in and everything has cooled down to room tep then ya start checking the bores again with the bore gauge and inside mic.'s then ya mic. each piston and start fitting . You want NO LESS the .004 SKIRT TO WALL clearance . it is like building a performance engine where everything is done wright and fits . we would not be having problems if we had the gas to run them on . No 87 octane gas was not what they ran on when new it was between 93- and 95 octane just like the cars and pickups of the day . Gas back in the early 60-75was at most station a min. of 95 for reg gas and 105+ on the hightest . Yes you can run you old H and M on 87 and not have tomuch problems because they are a SLOW turn engine when you get up to the 460-560 you can still squeeek by but they do better on the 89 . Now if that 560 has been up graded to the 706 engine then your going to have problems . Same hold true with the oil ya need a LOW ASH OIL . Once i learned that valve problems went away , shot myself in the foot with that as valve jobs put food on my table . When ya got the guys to switch oil they saved money on repairs and cut me out on the repairs.
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