Oil pump prime

[Cman]

What is the best way to prime the system after a re-build. I filled the oil pump, but feel sure that was lost in coupling the motor back up while moving it around.
Is it necessary to prime the system, if so how is the best way.
Thank you................

 

[Ohio D14]

I just got an engine unstuck, and had a similar issue.

Since the plugs were already out, I changed the oil, put on a new oil filter (filled it with oil before installing), then used the starter intermittently to spin the engine until the oil pressure came up.

I used the starter only a couple seconds at a time until the pressure gage started moving, then when the pressure was up, I ran the starter for 10 to 20 seconds at a time.

Once I had good pressure, I reinstalled the plugs, and started the engine, and let it warm up, and then shut it off, and repeated several times.

Maybe overkill, but that is what I did.

Others may have better advice, good luck

 

[Anonymous-0]

Coming out of the pump is a brass fitting unhook the line going to the filter. Then take a pump type oil can and pump oil in until is runs out, hook line back up and start. Watch your oil pressure gauge, you should have oil pressure in a few seconds.

 

[Cman]

Tractor is a 1949 Allis Chalmers "B"

 

[Goose]

Haven't done a tractor engine in years, but on car and pickup engines, I normally pack the pump full of either petroleum jelly or STP. This seals the pump to crate suction to prime it.

It would be hard to do with a tractor engine, but on car and pickup engines, I check the oil pressure while the engine is still on the engine stand.

I plug an oil pressure guage into the oil gallery on the engine. Then on an engine with a distributor driving the oil pump, I chuck an old distributor shaft into an electric drill, reach into the distributor hole and spin the pump until pressure comes up. On a computerized V6 without this option, I have an old, humongous 1/2 inch electric drill that will actually spin a fresh V6, without spark plugs, 400 to 500 rpm till pressure comes up. Either way pre-lubes the engine so pressure is right there when it fires.

I just don't like surprises after I've installed an engine.

I would think on a tractor, with no spark plugs and a healthy starter and battery, the starter would spin the engine fast enough for pressure to come up.