Service manual

4
be generated. It is imperative that all filings, dirt and other
contamination be removed from crankcases, oil passages, oil
pump and other engine components prior to final assembly.
Blow out oil passages with compressed air.
CAUTION - Metal filings, dirt and other foreign matter can
cause extensive damage to oil pump and engine.
WARNING - Compressed air and particles dislodged by
compressed air are potentially harmful. Wear protective
goggles when using compressed air and always direct air
stream away from yourself and others nearby.
Pump Installation
Read instructions completely and familiarize yourself with
installation before starting procedure. A summary chart of
installation steps is provided to help simplify installation. All
S&S oil pump kits are listed with the specific year groups
they fit followed by steps required for proper installation.
Select Kit Part # that corresponds to kit purchased and follow
required steps.
NOTES
● Perform only those steps required for oil pump kit you
will install. Installation steps vary between kits and year
groups. S&S urges you to review installation steps for your
oil pump and year group several times before beginning
installation or performing any crankcase modifications!
● Optional steps will update 1948-1962 and 1966-1972
crankcases to 1973-later style oiling . Step 4 applies to all
1948-1969 crankcases except 1963-1965 models. Step 5
applies to 1970-1972 crankcases. Both procedures separate
oil supplied to top and bottom ends to increase oil pressure
to hydraulic lifters and top end. This helps prevent hydraulic
lifers from collapsing at low RPM. While these two steps
are not mandatory, S&S strongly recommends them for all
engines using hydraulic lifters except 1963-1965 outside oiler
Panheads. It is also suggested that optional S&S high speed
oil pump drive gears be used in all 1972 and earlier engines
except Knuckleheads.
CAUTION - Failure to perform all required steps may result
in engine damage.
1. Disassembly and Crankcase Identification - All Years.
A. Remove old oil pump and mounting studs or bolts from
crankcase.
B. Identify crankcases by comparing them to those in
photo. See Picture 6. Circle year group that matches
your crankcases.
NOTES
● Proper identification of crankcase is imperative to insure
correct assembly.
● Machining of some aftermarket crankcases may not be
consistent with that of a specific stock year group. If in doubt
about modifications required for aftermarket crankcases,
contact crankcase manufacturer.
● S&S crankcases require no modification for S&S oil pump.
S&S 1936-1969 generator style cases are machined to
accept S&S or stock cast iron or early alloy pump. S&S 1970-
later alternator style crankcases are machined for 1981-1991
or 1992-up oil pumps as specified at time of order. Both
S&S and stock oil pump for specific year group can be
installed without modification.
1936 to 1947 1948 to 1952 1953 to 1964 1965 to 1969
1970 to 1972 1973 to 1981 1981 to Present
OIL PASSAGE
IDENTIFICATION
1. Main oil supply
2. Excess oil and pressure
valve relief
3. Front chain oil
4. Pinion shaft oil
5. Top end oil
6. Top end and tappet block oil
7. Pressure valve relief
1
2
3
2
4
5
3
1
2
3
1
2
1
2
6
4
3
7
4
6
3
Picture 6