S&S Cycle

1926–'84 vintage engines

1984–1999 Evolution ® 1926–1984 Vintage Engines Tools & Shop Supplies Warranty & Company Policy Appendix & Index

SUPER STOCK ® GENERATOR STYLE CRANKCASES FOR 1936–’69 BIG TWIN ENGINES FITMENT

• 1936–’47 knucklehead engines with tin primary • 1948–’64 panhead engines with tin primary • 1965-’69 panhead & generator shovelhead with alloy primary

• Custom—alternator/generator FEATURES AND BENEFITS • Pre-clearanced for strokes up to and including 5" • Motor mounts on crankcases for knucklehead engines are machined to fit stock 1936–‘47 frames. An adapter plate is included for 1948 and later style frames • All cases are designed for late style generator (two brush type) with 5⁄16" mounting bolts to eliminate early generator cradle/mounting strap bosses for simplicity and economics • Timken® sprocket shaft main bearing, in all years, instead of stock straight roller bearings— resulting in better flywheel assembly stability, placement, and longer engine life KIT CONTENTS • Crankcase assembly • All required bearings and hardware for installation • Assembly instructions

31-0010 REPLACEMENT PARTS: SEE PAGE 178

SUPER STOCK® GENERATOR CRANKCASES FOR 1936–'99 BIG TWIN ± Crankcase Style Stock Bore

35/8" Bore 31-0022 31-0026

Notes

– –

1984–'99 big twin—Alternator/Generator P-Series and SH-Series—Alternator/Generator

7 7

31-0010

±

31-0013

1965–'69 Panhead or Shovelhead

1,4,6

24519-65

31-0008 ± 24519-63, 24519-58, 24519-55

31-0009

1948–'64 Panhead

1,2,5

P-Series Replacement 1948–'64

–

–

1,5

31-0008 ± 24519-63, 24519-58, 24519-55

31-0013

P-Series Replacement 1965

1,6

–

106-4625 106-4369

KN Replacement Alternator/Generator KN Replacement Generator/Generator

1,7,8

31-0006 ±

1,3,5,8

Note: All S&S crankcases use Timken® style sprocket shaft bearings and 1958 & later pinion bearings. These cases will not accept stock 1957 & earlier flywheel assemblies.s 1. 1936–'69 style oil pump. 2. Machined for 1948–'62 panhead cylinder base oil feed. 3. Motor mounts are machined for stock 1936–'47 frames, adapter plate for 1948 & later style frames is included. 4. Includes primary scavenge port machining.

5. Machined for 1955–'64 tin primary. 6. Machined for 1965–'69 alloy primary. 7. Machined for 1970–up alloy primary. 8. Uses stock 1/4-24 hardware.

± WARNING: Cancer and Reproductive Harm–www.P65Warnings.ca.gov

NOTES: Engines for 1936–’64 chassis with tin primary must use a 1954–’64 style inner primary cover. S&S Super Stock generator style crankcases are available for stock 37/16" or 35/8" bore, but can be special ordered for bore sizes up to 313/16" and deck heights as much as 3/16" taller than stock. A special order sheet must be filled out for any special order crankcases. Ask your S&S Customer Support Representative or download special order forms from our website at www.sscycle.com/soforms Since all S&S generator style crankcases use 1958 and later style main bearings, stock flywheel assemblies 1957 and earlier cannot be used in S&S crankcases. Flywheel assemblies must have 1958 and later pinion shaft with 1.250" diameter bearing, and a 1954 and later style sprocket shaft designed for a Timken® main bearing. Generator style cases for 1936–’47 knucklehead engines are machined to supply oil to the heads from a boss located near the rear tappet guide or from a stock or S&S gearcover. Provision for oil scavenging from the heads in these crankcases is the same as stock, with passageways that connect the tappet guides to the crankcase breather gear. Crankcases for 1948–’69 engines are machined with a provision to separate the oil supply to the top and bottom ends if an S&S oil pump is used. This feature lets you choose the 1972 and earlier stock "side oiling" system or the 1973 and later split oil system. The stock cast iron oil pump can be used for the "original look" and stock oiling system. If an S&S billet oil pump, part #31-6200±is used, the oiling system can be set-up as stock or updated to a split system. 1963–’65 panhead engines, with outside oil supply lines to the cylinder heads, must use the oil supply port located behind the rear tappet guide or the oil fitting toward the rear of the S&S gearcover. S&S generator style crankcases do not have the stock style "outside oiler" oil supply boss, so special oil supply lines will need to be fabricated.

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