I can remember a 2 cylinder Murphy diesel that had fittings plumbed into the pan like that.It was on a sawmill.You would drive up to it with a truck,then hook a couple of hoses from the truck to the pan fittings.In about 1/2 hour you could spin the engine right over.The guys would sharpen the saw,reset it,get the rest of the machines started,actually sawing was the last part of morning setup.They had hoses on the skidders too,but they usually just built fires under them.