Rotary Seal Design Guide - Seals Unlimited

Catalog EPS 5350/USAEngineering5. Verify the desired lip direction for theapplication (lip toward oil for best retention).6. Examine the leading edge of the shaft.Shaft should be properly chamfered and free ofnicks and burrs that could cut or nick the seal lip.7. Examine the leading edge of the housing.The seal bore should be chamfered and free ofnicks and burrs that could gouge the seal outsidediameter or make the seal difficult to install into theseal housing.8. Examine the shaft where the lip will makecontact. This surface must be free of grooves fromprior service. If shaft is damaged or worn in thisarea, dress shaft for proper finish or install a QuickSleeve or wear sleeve. If using a Quick Sleeve, anoversized seal is not required. If using a standardwear sleeve, the replacement seal must have aninside diameter that is designed to be used withthe wear sleeve’s outside diameter.9. If the seal lip must pass over keyways orsplines on the shaft, use an installation sleeve toprotect the seal lips as they pass over these areas.If an installation sleeve is not available, wrapmasking tape around the shaft to form a protectivebarrier.10. Slide the seal over the shaft to the sealhousing. With finger pressure, start seal intohousing with a slight rotating motion until seal hasa light press fit in the housing. Be sure seal issquare or perpendicular to the shaft. If the seal iscrooked or cocked, continuing with installation willdamage the seal.11. Position the installation tool and drive theseal into the housing until it is flush with thehousing or recessed into the bore the properdistance. Please note that a screwdriver, punch orhammer should not be used to install the seal.Refer to the diagrams at right for recommendedinstallation tools.12. When using a metal driver to install metalclad seals, extra care is needed to be sure theshock load does not dislodge the spring.13. If the seal is cocked in the housing, removeseal and start over using a new seal. Attempts tosquare the seal in the housing using direct blowswill damage the seal.14. Inspect the seal to be sure it is straight andflush. Examine the face of the seal for damage. Ifit is dented from installation, the lip will bedeflected and will normally cause prematurefailure.Counter Bore Installation — Flush MountTool bottoms out against machined face ofhousing to position seal.Counter Bore InstallationSeal is positioned square by seating againstcounter bore.2203/28/062-13 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com