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#1
06-12-2016, 01:27 PM
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M18S oil problem
I've got a M18S I just rebuilt. Went to crank it over I put a oil psi gauge in the with the sending unit and I've got no oil psi. I took the sending unit out and I can't get any oil to come out turning it over. I used the old oil pump but I was wandering if it could be ducking air where the block half go together or my pump is bad. How much psi should I have just cranking it with the starter. I'm thinking to possibly the block is wore to much where the pump runs. Any help would be greatly appreciated. Thanks. ~
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#2
06-12-2016, 02:00 PM
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Oil in it?
Sump installed? Proper gasket on the filter hose housing? (Where the lines for the remote filter hook up) Did you install the oil pressure regulator? You would have to crank it a while to prime the system and build oil pressure. Should make at least 10 PSI. As long as the gauge moves, be happy.
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#3
06-12-2016, 02:05 PM
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I've had a few that ran for 30 seconds or so before having oil pressure, as long as you lubed it up good during assembly I'd start it and see what it does.
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Tim Pap's 100 Restored 108 1211 Dual Stick 1050 Pap's 100 restoration thread - http://onlycubcadets.net/forum/showthread.php?t=47965
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#4
06-12-2016, 03:00 PM
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I THINK if you reversed the lines on the oil filter, a check valve in the filter will cut the oil flow off. If that's not correct, I'd like to hear another opinion.
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#5
06-12-2016, 03:06 PM
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I fill the new filter with oil,as instructions are on the filter.
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Up to 533 and counting... I give up updating my profile!
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#7
06-12-2016, 08:13 PM
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Did you put the pressure relief ball & spring in the block before you installed the cover plate?
is the roll pin in the pump gear? did you install the gerotor (oilpump) both inner and outer? They make #50+ @ idle. I would not run it any more till you pull the crankcase cover and check those things, no oil circulation does bad things. Also check as suggested if oil lines are properly routed. Did you follow the explicit reassembly in the service manual? 
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#8
06-12-2016, 08:52 PM
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I have found they start pumping faster if the sensor port is open, no restriction. Stop cranking quickly when you see oil come our.
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Richard 1979 IH Cub Cadet 782 w/CH20, dual hydraulics, power steering and Cat 0 three point
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#10
06-12-2016, 09:53 PM
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I did put all the all those things in. Could the pump gears be worn that bad or the block. I'm going to put a new oil pump in it and go from there. Thanks for the info. I do have a service manual. And I've rebuilt engines since I was 12 and I'm 43 now. Never had this problem. I didn't fill the oil filter but I bib take the sensor out. And got no oil.
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