[Desmogod]

I just replaced the driven gear and sprag on the 748, and the motor was left sitting without oil for about a month whilst I waited for parts. (Sprag spring and driven gear.)
Started her this afternoon, no oil light, waited, no light, so I shut her off.
Tested the pressure switch and it's fine, left the switch out and unplugged the coils, and no oil comes out of the hole
Is there any way of priming the pump without taking the side cover off (I tried syringing oil into the pressure switch hole, no dice)?
What else could be causing this?

 

[tye1138]

Well, you can verify oil is heading down the crank shaft by simply taking off the left side crank turning cover and when you turn the motor over, oil should squirt out of that super quick. I've noticed before as well that unless the motor is actually running, the oil sensor port sometimes doesn't get full of oil from just turning it over slowly. I think Ducati used different starters over the years and some are just really weak. My 848 will fill that port up with oil with one tap of the button, but my 748's never did.

If you changed the sprague gear, I don't see how that would have any effect on the oil pump. The pump is driven directly off the crank on the opposite side of the motor.

 

[Desmogod]

Yeah, I know the oil pump is on the other side, but this bike has somewhat of a chequered past, and is known as Eleanor for a reason, so this new failure is hardly surprising.
So if oil is running through the crank, that's a good indication of the pump actually working?

 

[tye1138]

If its goin' through the crank at pressure to shoot across your room (which is about what it normally does) then yep... If it dribbles out, nope.

 

[Desmogod]

Barely even oozing out.

 

[Desmogod]

Removed the clutch and side cover, took out the pump and pulled it apart, filled with vaseline and re installed.
Great success.

 

[tye1138]

koo

I'd monitor the oil pressure closely, just to be on the safe side.