I would like to get my 4020 functional again but I don't have much experience working with diesels. The tractor generally will not start without assistance from the block heater or ether (which I generally avoid) unless the ambient temperature is approaching 80 degrees. It's a 1970 model, with a M&W turbo (installed early 1980's and I don't think they turned up the fuel). The engine has never been rebuilt and probably has 9-10K hours (hourmeter was replaced some time ago). The tractor runs fine at all engine speeds once started. It only is used for light work on a blade and brush cutter, so I can't comment on absolute power level. It has a Roosa Master pump model CBC-633--244L. The tractor has smoked constantly since new. I'm told this is a characteristic of that particular pump.
Other observations: One time I started it, let it run a few minutes, then shut it down. I tried to start it a few minutes later, and it refused to start, which made no sense to me as it had not been shut down long enough to cool off. A shot of either (ugh) got it going. Also, it is not consistent - some times it will start at a given temperature without help from the block heater, other times it will not.
My first thought was that with the advanced age and hours, compression is bad and that is the main problem here. But the other things I have noticed suggest that there might be fueling issues.
Advice? Thanks.
Other observations: One time I started it, let it run a few minutes, then shut it down. I tried to start it a few minutes later, and it refused to start, which made no sense to me as it had not been shut down long enough to cool off. A shot of either (ugh) got it going. Also, it is not consistent - some times it will start at a given temperature without help from the block heater, other times it will not.
My first thought was that with the advanced age and hours, compression is bad and that is the main problem here. But the other things I have noticed suggest that there might be fueling issues.
Advice? Thanks.