The engine is the ad3.152. On cold start the engine has 50 psi oil pressure, as it warms up ( takes about 30-45 mins of run time), it gradually goes down to 10 psi, maybe a little less @1700 RPM. I think I need to pull the pan and expect to find worn main bearings but hopefully good journals. I will probably replace the oil pump while I'm in there. Oil pressure was verified and checked with another gauge.
The engine runs strong, cold starts fine, even in near freezing temps, does not use oil, no blow-by, no strange noises and runs smooth. From these things, I believe the engine to be healthy except the oil pressure.
Questions,
1. Can main and rod bearings be replaced without splitting tractor, or simply dropping oil pan?
2. What about the thrust washer/bearing halves, these seem to be problematic or known to fall out, are these serviceable without splitting too?
3. I searched, but did not find a write up, tips or tricks to doing this job, is there anything out there other than using the manual.
The engine runs strong, cold starts fine, even in near freezing temps, does not use oil, no blow-by, no strange noises and runs smooth. From these things, I believe the engine to be healthy except the oil pressure.
Questions,
1. Can main and rod bearings be replaced without splitting tractor, or simply dropping oil pan?
2. What about the thrust washer/bearing halves, these seem to be problematic or known to fall out, are these serviceable without splitting too?
3. I searched, but did not find a write up, tips or tricks to doing this job, is there anything out there other than using the manual.