No oil pressure- better yet I made a vacuum!
 

Cub Cadet 1862

Need a little help with an oil issue, Last summer our governor decided to come apart and in doing so got caught between the crank and the crank case! Crank case lost that fight, so I was forced to do a little over haul. I found a used case on line and after cleaning it all up and replacing all bad/ worn parts it’s back together and running. Well kind of—see I can’t get any oil pressure- Better yet I’ve got a vacuum going on. Pulled sending unit and turned engine over with a drill and found it’s sucking air in. Not only that but it’s sucking air in at the breather- a lot of air. I’ve taken every line apart and tried to do everything. I’ve gotten a little oil to come out of the pump when I plug up all holes ( breather, sending, and anywhere else I hear air). Taken case apart twice and checked all bearings and oil holes, checked oil pump a few times-- all Checks good.
Any ideas?:bash2::bash2:
I have run the engine in short busts to check it out but with no oil pressure I only run it for less then 2 minutes.

How did you spin the motor with a drill? Off the bolt on the front?

J-Mech,
Yes I put the drill on the front, which is really the back. The PTO end. Anyway because it's the back I had to use the drill in reverse.
I think I know where your head on this! No I doubled check to ensure I wasn't spinning the motor backwards. And with that when I start the engine it spins the same way and for that matter it still has the same issue with no oil just vacuum.

How do you know it has vacuum?
And when you say that, do you mean the crankcase has vacuum? Or the oil system?
How do you know it has no oil pressure? Did you double check it with a gauge?
I can't think of a single way that you could have vacuum on the oil circuit...... I'm hesitant to say, it's impossible. (Because I've seen so much that shouldn't be, that was.)

If your talking about the crankcase being under vacuum...... how much? The crankcase pulses... if you put your finger over the vent it you will feel it suck slightly... but should build pressure after a short time.

:bigthink::bigthink::bigthink::bigthink:

Need some answers to above questions......

I should wait until morning to post. :beer2: I will start by saying I have never split a Mag. But, is it possible to make the oil pump work backwards? That seems to be the only way possible to get a vacuum in the oil galley.

No, it is not.

Proper engine rotation is:

PTO = CCW
Drive Shaft End = CW

Check the pressure relief spring/plunger and check ball by removing the pto end cover,sometimes they get left out/lost.
Check the manual for proper assy location.
Also if it is a mag 18 they don't use a gasket on the cover, just sealant.

Lets go a little further, what model is the engine case from, that you bought?

If the drill was in reverse on the crankshaft, I think you were turning it the wrong direction. You put it in reverse to turn the transmission.