Zetor 5745 - blue and black smoke

[EgilF]

I got a 1976 Zetor 5745 that have some problems. When driving on low speed the smoke is blue, when I put the throttle down fast it become a lot of black smoke. The top gasket is new. There is no pressure in the oil pan in bottom of the motor. Motor is not as strong as it should be, but is starts very easy so the compression can't be that bad.

Black smoke indicates is too much diesel and too little air; does anyone have any tips how to troubleshout Zetor-wise to find what probably is the problem/problems?

 

[Roadworthy]

I'd start with the air cleaner. Be sure it's clean and there's no blockage in the path from there to the intake manifold. It's amazing how fast they can clog with dust.