Timing gears? have you pulled it that far apart? On timing gears there are usually stamped onto the gears a small dot. lign them up. Not sure why tore down so far? If you take off the diesel pump align the timing marks in the small window plate first else you will be in a mess.
There is a hose that is connected to the oil pan in place of the drain plug directly under the oil filter that will have an end cap. This hose is used to drain the oil into a waste container.
Download the service manual located at the address below and follow the instructions in the manual.
Have a manual for Pramac Products?