S&S Cycle Billet Oil Pump for Big Twin Engines - Manual (Page 11)

11
C. On 1948-1952 crankcases, blow air into intersecting hole in pump gasket surface to remove chips. On 1953-1969 crankcases, remove oil
plug and lifter screen filter assembly and blow air into passage to remove chips. See Picture 19.
WARNING
Picture 19
NOTE - Before attempting to remove chips, remove set screw to allow chips to escape.
Compressed air and particles dislodged by compressed air are potentially harmful. Wear protective goggles when using compressed air
and direct air stream away from yourself and others nearby.
D. Apply Loctite® to threads of 1⁄4 -20 set screw provided and install screw to depth of .540" to .600" below gear cover gasket surface.
E. Install S&S® Oil Pump Drill Jig, part #53-0013, on crankcase oil pump gasket surface. See Picture 20.
Picture 20
F. Wrap masking tape around .187" (13⁄16") drill bit .750 “ (3⁄4”) from drill point. Using tape as depth guide, drill hole into pump gasket surface
.375" (3⁄8") deep, until it breaks into passageway just tapped. (Hole to be drilled is 3⁄8" deep and drill jig is 3⁄8" thick; 3⁄8" + 3⁄8" = 3⁄4"). See
Picture 20.
NOTE - Do not drill hole too deep. Hole must not extend into gear cavity side of crankcase.
Improperly drilled oil feed hole may cause oil to bleed off into gear cavity resulting in oil pressure loss and possible engine damage.
CAUTION