Oil pressure

[Joshua Mitchell]

OK.
I have gone through what I hint hint know.

Replaced gaskets and many other items. Had oil pressure when started everything but now its all back together and no oil. HELP

[Jdsharp]

Did you prime the oil pump?

[Glen]

Hi,
Sometimes after sitting, or the engine being apart, the Cub oil pump won't suck up oil from the oil pan, then the pump needs priming.
Below is a post I made about priming the oil pump, the post is part way down the page.

viewtopic.php?f=1&t=91765&start=60

The engine bearings and crankshaft can be damaged by running the engine with no oil pressure.

[Crimson Tim]

Amongst the gaskets you replaced, does that include the gasket at the oil pump itself? That’s about the only gasket where thickness is critical. If it’s too thick, the clearances in the pump will be too large and it won’t be able to provide sufficient pressure.

[Joshua Mitchell]

I HAVE NOT PRIMED THE PUMP. I WAS LOOKING IN THE MANUAL BUT CANT FIND A PROCEDURE. I WILL TRY WHAT GLEN POSTED GOING THROUGH THE PRESSURE HOLE IN THE HOUSING. THE ENGINE HAD 2 STUCK EXHAUST VALVES WHEN I BOUGHT IT AND I HAD TO REMOVE THE HEAD TO DECOKE THEM. SINCE I WAS THAT FAR I WENT AHEAD AND REMOVED ALL COVERS, PANS AND COOLING SYSTEM TO DO A THOROUGH CLEANING. I DID NOT REMOVE THE ROTATING MASS FROM THE BLOCK. AFTER CLEANING EVERYTHING AND BLASTING IT, I REPAINTED IT ALL AND REASSEMBLED. I DIDNT WANT IT TO START UNTIL THE OIL SYSTEM WAS PRIMED SO NO PLUG WIRES YET. I FIGURED IT PRIME BY TURNING OVER. IF THIS IS NOT THE CASE PLEASE FEEL FREE TO LET ME KNOW. I INTENDED TO DO A COMPLETE NO BOLT UNTURNED RESTORATION OF THE CUB BUT IN THE END I DECIDED TO GO THROUGH EVERYTHING AND MAKE IT PRETTY AND USEABLE. MY OTHER CUB WILL GET THE COMPLETE JOB SINCE I HAVE SEVERAL TRACTORS NOW. I NEED ONE TO PLAY ON MEANWHILE. I WOULD POST PICS BUT I CANT GET THEM SMALL ENOUGH FOR THE SYSTEM TO ALLOW IT.

[Don McCombs]

I FIGURED IT PRIME BY TURNING OVER. IF THIS IS NOT THE CASE PLEASE FEEL FREE TO LET ME KNOW.

IT'S NOT THE CASE. FOLLOW GLEN'S RECOMMEDATION.

[Gary Dotson]

Oil pressure will not register, on the gauge, until the filter chamber completely fills. Pressure should register within a few seconds of start up but you'll never see it cranking.

[Eugene]

Prime the oil pump as Glen suggested.

To check to see if the oil pump is working, leave the cap and filter out of/off the oil filter housing. Crank the engine with the starter. Couple secends you will see oil flowing out of the hole you used to prime the oil pump.

OIl being pumped out the hole, install the oil filter and cap. You are good to go.

[Joshua Mitchell]

Thanks for all the help. Primed her up and started. Purrrrrrs like a kitten with good pressure. But now very little throttle response.

[inairam]

Thanks for all the help. Primed her up and started. Purrrrrrs like a kitten with good pressure. But now very little throttle response.

Make sure the linkage from the governor to the throttle is free and the lever on the governor is free to move. Adjust the carb to governor linkage per the manual. If that does not do anything replace the governor spring - which is usually always a good idea.

[Rick Spivey]

Thanks for all the help. Primed her up and started. Purrrrrrs like a kitten with good pressure. But now very little throttle response.

Did you replace the small clamp-like support that helps guide and steady the throttle rod? It attaches to one of the head bolts and loosely wraps around the rod. Without it, the rod can bend too much, especially if the rest of the linkage at the governor is binding somewhat, and your throttle response will be poor.