The oil supply is taken from an existing port beside the turbocharger oil supply located on the oil filter head. Use a hydraulic grade single braid 3/8" ID hose for the oil supply to the Model 25 Spinner. Another oil supply take-off point is the turbocharger oil supply port itself. The existing 90 deg elbow fitting which connects to the turbocharger oil supply tube is replaced with a special carbon steel 'T' fitting, "Fluid Line Products, part # 99081703 to create a supply of oil for the Model 25 centrifuge.

The oil return for this installation is to an existing port behind the passenger side motor mount. Stock, this port is plugged with a 'frost' plug. Older 5.9l Cummins engines do not have this return port so another return source is needed. From the two pictures above you can see the pieces used from existing parts to weld a custom made oil return fitting for the block. The "O" ring end slides into the block, the threaded end screws into your oil return hose.

The generic Model 25 installation guide indicates a 22mm , (7/8") inside diameter is the minimum fitting size on the engine's block needed to insure the oil exiting the Spinner doesn't back up the return oil hose into the centrifuge, contacting the turbine and dragging the rotating rpm down severly with resultant loss of centrifugal force and oil cleaning ability. This event is termed "flooding" and a successful installation will never do this.

These instructions are guidelines, use your own good judgement in your particular installation.