I have a 4020 with the coolant tank that goes under the left hand side of the machine, and extends out 18" form the side, it's got a large pump and Hydrosweep (not sure if it's 100gpm) but it pushes out a lot of coolant to wash chips down into the conveyor. The problem is if there's more than maybe an 1/8" covering of chips on the slooping floor of the enclosure it has trouble moving the chips. So I never use the hydrosweep.
I have a garden hose and nozzle attached to the coolant pump. It's ok to move chips off the table, but to move chips down to the conveyor I use a stiff brush and shovel.