Sherwood Pump Catalog

58 Pleasure Boating Commercial/Fishing Use Maintenance (Low Hours) (High Hours) Schedule Light Duty Severe Duty Heavy Duty Severe Duty (High RPM, Silt or Sand) (High RPM, Silt or Sand) Impeller Kit Every year 6 - 12 months 6 - 12 months 3 - 6 months Minor Kit 2 years Every year Every year 6 months Major Kit 4 years 2 years 2 years Every year Preventative Maintenance and Inspection * See pages 16-31 for Repair Kit Part Numbers. The #1 reason for premature engine wear is overheating. To maintain engine performance, insist upon genuine Sherwood impellers and service kits. Recommended inspection to be performed at any service interval: Impeller . Inspect for cracks or tears. Also, inspect for excessive abrasion of vane ends. Replace annually, or if any of the conditions exist, as in the picture. Wear Plate . Inspect for wear, flatness, and pin for fatigue. Replace at major pump rebuild or if wear is evident to maintain pump flow and suction performance. Cam . . . . . . . . . . . . . . . . . . Replace at minor or major pump rebuild or if pitting/wear is evident. Cover . Replace at major pump rebuild or if wear exists to maintain pump flow and suction performance. Mechanical Seal . Replace at minor and major pump rebuild or if leaking. Lip Seal . Replace at major pump rebuild or if leaking. Shaft . Inspect for wear in area of lip seal and rubber impeller. Grooving of lip seal area or heavy fretting of the impeller end shaft will require shaft replacement. Bearing . Inspect for loss of grease, corrosion or rough rotation. Replace at major pump rebuild. Bead worn to flat Pitting Tear Cavitation Bowed (set) Ripped Vane