S&S Cycle Super Stock and Special Application Crankcases for 1936-99 Big Twin Engines - Manual (Page 6)

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B- Crankcase oil screen assembly
Location: Hole B. See Pictures 4, 5 & 6.
Hardware: 31-2010 crankcase oil screen, 31-2011 spring, 50-8008 o-ring, and 31-6021 cover screw. See Line Drawings, items 15, 16, 17, 18.
Function: Prevents oil-borne contaminants from reaching tappets and cylinder heads in 1948 and later engines.
Installation: All engines 1948 and later.
1- Slip spring over screen and insert in hole B with open end facing down See Picture 8.
2- Install cover screw with o-ring in place and tighten with large screwdriver.
NOTE: If screen is removed, be sure to reinstall with open end down and spring placed over screen as in Picture 8.
C- Cylinder head oil supply passage/oil pressure switch hole.
Location: Hole C. See Pictures 3, 4, 5 & 6.
Hardware: 31-2021 oil line fitting, 50-8112 45° fitting, 31-2016 oil pressure switch assembly, or 50-8331 socket head pipe plug. See Line
Drawing, items 27, 28, 30, 31.
Function: Supplies oil to cylinder heads in all shovelhead engines 1970 to 1984. Alternative source of oil supply to heads for knuckleheads
and 1963 to 1965. Panheads accepts oil pressure switch in big twin engines 1984 to 1999.
Installation: 1970-1984 shovelhead, 1936-1947 knucklehead and 1963-1965 panhead with outside oiler heads.
1- Install fitting 31-2021 in hole C.
2- Connect oil line to crankcase fitting and to rocker boxes on a knucklehead, to cylinder heads on a 1963-1965 outside oiler panhead, or to
rocker box on a shovelhead.
Installation: 1984-1999 big twin equipped with oil pressure warning light only.
Install oil pressure switch 31-2016 in hole C.
Installation: 1984-1999 big twin equipped with oil pressure gauge.
1- Install 45° 1⁄8” x 1⁄8” pipe fitting 50-8112 in hole C.
2- Install oil pressure sending unit (H-D® #74406-87) into 50-8112 fitting.
3- Position oil pressure sending unit to obtain clearance by tilting it away from rear tappet guide. See Picture 9.
NOTE: Install 1⁄8” pipe plug S&S® part 50-8331 in hole C if oil pressure switch or pressure gauge is not used.
Picture 8
Picture 9
* All reference to Harley-Davidson® part numbers
is for identification purposes only. We in no way
are implying that any of S&S® Cycle’s products
are original equipment parts or that they are
equivalent to the corresponding Harley-Davidson®
part number shown.