S&S Cycle Billet Oil Pump for Big Twin Engines User Manual

Page 18

NOTES

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Most S&S® oil pump gears have index marks. To assure proper gear mesh, marks must align when gears are installed in pump body. See Picture 31.
Marks in photo have been darkened; they normally appear as light punch marks.

Picture 31

•

If bind occurs, determine whether problem is with supply or return gears by removing idler gear from either side and rotating pump. When binding gear
is removed, pump will rotate freely. Problem can usually be corrected by rotating gear 180°.

Failure to correct bind may result in damage to oil pump or other engine parts.

E. Apply 20W50 engine oil to oil pump driveshaft and driveshaft bushing in crankcase. Install oil pump in crankcase in normal fashion, placing

pump drive gear #33-4230 over driveshaft as shaft is passed through bushing and into crankcase gear compartment. Refer to Harley-
Davidson® service manual or contact professional mechanic if unsure about installation procedure.

NOTE - A dab of Hylomar® or other thin gasket sealer in corners of gasket may be used to hold gasket in place if care is taken to avoid critical areas such
as oil passages and interior of oil pump. Otherwise, gaskets should be installed dry.

Gasket sealant may interfere with engine lubrication if allowed to enter oil pump or passages machined in crankcase. Damage related to
improper use of gasket sealant will not be covered under warranty.

F. Install driveshaft gear key and snap ring, taking care not to stretch or otherwise damage snap ring.

NOTE - Insure that drive shaft key and snap ring are installed properly. See Picture 32. If snap ring is installed incorrectly, sprung, or otherwise damaged,
it may become dislodged or allow gear key to come out.

CAUTION

Picture 32

Correctly installed.