Model 25 0.9 GPM at 60 PSI
Installation and
Service Instructions
OIL SUPPLY TO CENTRIFUGE
Oil supply should, in general, be taken from the highest pressure, hottest source available on the dirty side of the full-flow oil filter. A 3/8" pipe (or #6 hose) supply line should be used. Preferred pressure is 60 to 80 psig but the Spinner II centrifuge will operate efficiently at 25 to 90 psig.
CLEAN OIL RETURN TO SUMP
Gravity Drain. The Spinner II centrifuge must be close-coupled to the sump with an unrestricted 1" ID (or #20 hose) drain returning above the normal sump oil level. The drain line must be sloped downward from the centrifuge outlet and be free of sharp bends or traps. On many engines, an access plate can be modified to provide a suitable drain opening as well as sturdy mechanical support. Be sure the sump side of the drain opening is clear and that the drain oil does not impinge on moving parts of the engine. Refer to drawing below for proper line sizing and routing.
MECHANICAL CONSIDERATIONS
Spinner II centrifuges are high-speed devices and should be securely mounted to prevent excessive vibration. Operation up to 15 degrees from vertical is permitted.
MODEL 25 SERVICE INSTRUCTIONS
1. Shut off oil supply (or stop engine) and allow centrifuge turbine assembly to come to a complete stop.

2. Unscrew cover nut and remove cover assembly.

3. Partially withdraw centrifuge turbine assembly from the housing and allow oil to drain from nozzles before removing completely. Hold the assembly in one hand and remove bowl nut. Carefully separate centrifuge bowl from turbine. Remove stand tube.

4. Carefully remove sludge from centrifuge bowl using a wooden spatula or other non-damaging tool.

5. Wipe out bowl with solvent and wash stand tube and other parts.

6. Clean turbine and examine top and bottom bearings for excessive wear. Check turbine nozzles to ensure free passage of oil. Replace centrifuge bowl seal.

7. Seat stand tube in turbine, replace bowl and reassemble centrifuge, tightening the bowl nut securely by hand and making sure that the bowl seal is uniformly seated all around.

8. Examine spindle journals for damage or excessive wear. Replace base assembly if journals are damaged. Spindle is pressed into base and aligned at the factory and cannot be properly serviced in the field.

9. Replace centrifuge turbine assembly on spindle, being careful of bushings. Be sure it rotates freely.

10. Clean and inspect cover, paying special attention to cover nut assembly. The seal should be replaced if it shows signs of leaking.

11. Examine the base-to-cover seal and replace if damaged.

12. Replace cover assembly and tighten cover nut securely using small end wrench. Make sure that cover seats on base assembly evenly all around so that cover seal is properly compressed. Check all centrifuge mounting bolts for proper tightness.

13. Open oil supply to centrifuge. With engine running, check all connections and joints for leaks. Repeat assembly if vibration is excessive.