Lift the plunger to hand-prime the pump until the pressure reads approximately 20 psi (1.38 bar).
Note: If the lever arm  pushes up on the plunger, you cannot hand-prime the pump. Operate the spindle up to 30 minutes for the next pump cycle to complete.
In MDI mode, command the spindle to run at low speed, for example, 5 RPM.
This turns on the oil pump motor.
Stop the spindle when the lever arm drops.