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Vic, I forgot to answer you're question. Yes the eng is a dh1100. It's stamped on the block where the fuel pump is.

Just eliminated the oil pump. Took all my out of the box thinking to come up with a contraption to ck the pump. REmoved the filter houseing, spun the eng over to see where the oil came out. Tapped that hole with 1/8 pipe tap, spun the eng again to clean the metal out. Made a tee with a welded...

Thanks Vic. Yes thre are 2 ball and springs in the filter houseing. One is encapsulated, :Presssed together. The other is just a ball , about 5/16 and 1 inch long spring held in by a screw in plug with a recess in it for the spring. I'm makeing a tee to screw the encapsulated part into so I can...

Thanks vic. I pulled the the oil filter houseing off last night. The screw in ck ball was not stuck open and had no transh under the seat. I removed it and applied regulated air pressure to the seat side, it took 60 psi to usnseat the ball. There's another ball and spring in the houseing...

That would be a huge variable. What rpm, how hard it's working. Every hour would be different.

L235, eng, DH1100. only 1200 hrs. At idle cold, pressure is only 5psi, at 2000 rpm only 10 psi. Manual lists possible causes. Restricted oil filter or screen, pressure relief valve stuck open, rod, main or cam bearings worn and worn oil pump. All of these are major except oil fliter which...

test post, last one did not go through.