No oil pressure

[Gene in La.]

The other day while bushhogging I lost oil pressure! Story; tractor runs hot brcause radiator needs cleaning out; so after cooling radiator down by running water over, I started back to field (no "0" oil presure) removed oil pump cleaned, looked OK; still "0" oil pressure: good oil gauge no oil from block: Any ideas; or replace oil pump!!! Sorry for long post; Thanks Gene
 

[miner09]

Did you take oil line off and see if you were getting oil to gauge?
 

[John(UK)]

You will need to drop the oil pan and check the Pump and while you have it off, you should check the bearings on the Crankshaft as well.
What is the oil like right now, have you got the correct grade in there, are there any unusual noises coming from the engine now. No pressure is not good. It could be that the Pump is not turning due to something shearing, drop pump and take it apart to measure wear at the end of the lobes on the "gears", should be no more than .010", if the wear is approaching that anyway, it needs changing, you can check components while you do all this. The Radiator needs cleaning out often 2 or 3 times a day when it is dusty and there is vegetation blowing around, the same applies to the Air Cleaner as well. Use a hose from the engine side to the front and make sure that you get all over the radiator especially into the corners. Use a light at the engine side and look in from the front so you can see just where there is any blockage. If you allow the engine to overheat like this there is a big danger that the Cylinder Block or the Head will fail.If you need help, just ask..John(UK)...fergusontractors@hotmail.com
 

[Gene in La.]

Yes, I checked at block, by removeing connection at block to gauge; no oil came out; that's why I dug futher into block at oil pump!!!
 

[Jerry/MT]

Make sure the oil pick up tube is not cracked or leaking and that the presure relief valve is not stuck open. Is the oil pump drive gear pinned to the pump drive shaft.
 

[Gene in La.]

Radiator I mean the inside, the out side I keep real clean. Oil is ok, 10w30, could use a change but ok. Noise no unusual. When I took pump apart and removed a spring by removeing a carter pin; it effected nouthing???
 

[Gene in La]

Yes but no oil from block
 

[John(UK)]

Then it looks like either the pump is worn or the bearings on the crank....but check the pump for wear...John(UK)...fergusontractors@hotmail.com
 

[Jerry/MT]

Was there a piston at the top of the spring in the releif valve? Was the spring the correct one? It can be shimmed to providea higher relief pressure.When you say "it affected nothig" what do you mean?