S&S Cycle OEM Crankcase Modifications for 1963-1965 Outside Oiler Panheads - Manual (Page 2)

Panheads with outside oiler cases and heads cannot utilize Step #4, Optional Crankcase Modification described on Page 5 of S&S ® Oil
Pump Instructions #6250 with revision date 7-2-96 or before.
If performed on 1963 to 1965 “outside oiler” panheads, modification described in Step 4 will result in oil starvation to top end
and extensive engine damage.
Future revisions of Oil Pump Instructions # 6250 will read:
4. Optional Crankcase Modification - Plug and redrill Crankshaft Feed Hole - 1948 to 1962 using #31-6001 pump body or 1966 to 1969
using #31-6001 or #31-6073 pump body.
NOTES:
● Objective of this modification is to alter 1948 to 1962 and 1966 to 1969 crankcases to 1973 and later style oiling. With this oiling
system heads and lifters get primary, unrestricted oil supply first, and lower end main and rod bearings get secondary oil supply
after top end is supplied. This modification is recommended only if hydraulic lifters are to be used.
● 1948-1969 style S&S crankcases have special machining leaving installation of plug as described in Section 4-D as only step required
to complete modification.
Different year groups and new CAUTION are only changes to Step 4.
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CAUTION