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Its now August and the days are getting shorter again and we will all be all up neck of snow as to say before we know it again, This Diesel the problems just seem to go on and on , it seems this tractor has been restored in a way Like back to 1960 , have a look at this picture
this is the main shaft that operates the brake on the left hand side as you sit on the tractor as you can see its like a bit worn ,
and the bush and hole in the main trumpet housing is in the same state ,Oval ( do you think im being a bit picky ) Its only his brakes , and its only a ton tractor , GEES US F ING CRISPS ,cheese n onion thanks , A ton tractor doing say three miles a hour now hits weighing about 3 tons , how stupid are people, so after reaming out this hole to make it round again ,
and a new bush made on the lathe and fitted all was well
and after releasing the joint ,
it was all reassembled tho I the main shaft was replaced with a new one , then the shoes recentered and adjusted it all worked as it should. The engine is coming along fine new pistons, rings, liners,
the pistons and liners moved up in the block ready to fit the crank
the old liner retainers are now scrap , broken, bent and worn, seems some people just havent got a clue about these things ,
you have to be very careful when replacing then liner retains you need to check the height above the block otherwise you will end up with all sorts of problems ,
the head has seen better days as you can see its had a few knocks and been thrown about a bit, lucky all the knocks are inside the cylinder area , which also tells you what ever did it was in the cylinder ,
you can even figure out what some of the marks were made by , look at the shape, there should be no way for a collet to get in to the cylinder unless it was stuck to the bottom of the head when it was fitted , which means they dident look or wipe down that face , very sloppy ,
look at the dent on the edge of this seat, they have now been recut and ground,
seems to me this engine had just been thrown together to get rid of , the thing is when you buy one of these so called Restored tractors you carnt see any of this , the head has new valves ground in ,
new springs and collets,
, and this is the old stuff,
it goes on the crank has been reground .010 ends and mains Heres the crank after the regrind looks all nice
and bright and as you can see in the picture new big end and man shells too ,
I got a surprise when I removed the main bearing housings off the old crank shaft guess what was jamed in the web ,
yes its a bit of a liner and not one of the ones I took out , as you can see its pritty well jammed in ,have a look at the old main bearing
can you see the scuffed metal in them , the thrust bearing that check the crank end float where just as bad showing 25thou of movement when I stuck a feeler gauge down the side
see even the rear crank seal is the original one I mean its still got the leather seal in it
and this is one of the big end caps i had to replace some idiot had put the shell in the wrong way round and damaged the cap it dont quite show up in the picture but its enough to give you problems if you try fitting a shell in it
ho well wonders will never seace with this RESTORED ENGINE ha ha ha , yes im going on a bit , you just try imagining what you would be saying if this was your tractor ,that had been "RESTORED"
anyway the motor is back together now and fitted back to the tractor ,head on push rods in and tappets adjusted ready for first run, the timimg all set up and been checked and rechecked
, as you can see in the picture
i use a bit of an old chain case the part with the cam chain adjuster in it so i can set everything up and see everything thats going on ,now all im waiting for is the pump and injectors to come back , Wednesday 18th August Its not surprising that I’ve only got the first two jobs done of the fifteen on my list to-do-today because of the interesting things going on in the workshop which made it necessary for me to keep stopping and looking. The Z120 engine was being dismantled today and the comments floating through made the sight of the dense black gunge over and inside most of it not a surprise. Measured on the side of the crankshaft the solid oil was 2mm thick! Its been baked, was the verdict. Hopefully a technical blog on the topic will follow shortly but what I was shown, apart from the 2mmm thick baked on oil coating was that the water jacket was completely blocked , the head and the main cylinder block itself looks as if about ten cans of radweld had been used on this tractor at one time , then pin from the oil pump had some how found its way into one of the pump outlet ports which explained why the cog had been slopping around on the shaft because someone had replaced it with a pin from a (needle-bearing) impressive work by a previous ‘mechanic’ (I use the term loosely) had dropped the proper pin inside the pump. Lack of oil would explain the overheating which had taken place and the burnt on oil in the rocker cover. But, I also had it pointed out, this engine had not only been seized up but had stood for some time afterwards. All the evidence was pointed out to me- marks on the top shells of 1 and 4 cylinders but not on 2 and 3 - like a good detective story it all hung together! (Tomorrow I’ll try to catch up with my list but its much more fun having an engine explained to me).
Thursday When I arrived it was to be greeted with a demonstration of oil spurting from all the correct places in the chaincase of Trevor (the diesel). With the cover off it could be seen that the oil pump was working like a dream and all the oilways were clear (I approve of this checking at all stages- means it doesn’t get to total rebuilt stage only to find that something which was easily accessible earlier then meant a dismantling). Cursing and swearing from the workshop alerted me to a crisis… ‘No wonder it wouldn’t------ stay adjusted!’ |
