We use a piece of equipment with an oil system that has two pumps, one is a shaft driven oil pump (IMO C3E3B-143) and the other is a motor driven pump (IMO A3EB-87).
The shaft driven oil pump is a capacity of approx. 8 gpm at 12 psig (we use Mobil 797 oil). Approx. 4 gpm go to the pump...