S&S Cycle Crankcase for Harley-Davidson Twin Cam 88 Engines - Manual (Page 8)

6. Crankcase Cylinder Studs
S&S® crankcases for Harley-Davidson® Twin Cam 88® engines are
shipped with cylinder studs installed Before assembling engine, verify
that the lower collar of each stud is contacting the case deck, and that
the studs are torqued to 10 ft.-lbs.
a. Removal
i. Thread two 3⁄8"-16 nuts onto end of stud and tighten them
together.
ii. Use a wrench on the lower nut to remove stud.
b. Installation
i. Place a ball bearing into the end of a head bolt then place the
head bolt on end of the stud without a collar.
ii. Screw stud into the case, collar side down, until collar contacts
case. Torque stud to 10-ft.-lbs.
CAUTION
Do not carry the crankcase by the studs. It stresses the crankcase
and studs in ways they are not designed to handle. Also, it is easy
to drop and damage the case when it is carried by the studs.
7. Flywheel Assembly
S&S® crankcases for Harley-Davidson® Twin Cam 88® engines are
designed to use any S&S flywheel assembly, or 1999-2002 Harley-
Davidson flywheel assembly.
NOTE: 2003-up Harley-Davidson® flywheel assemblies will not fit in S&S
crankcases. For 2003, Harley-Davidson started using a flat roller bearing
on the sprocket shaft. S&S cases must use flywheel assemblies that use dual
taper roller bearings.
NOTE: 2003-up flat roller sprocket shaft bearing is not compatible with
S&S cases
CAUTION
It is not recommended to attempt using a 2003-up flywheel
assembly by changing the sprocket bearing from the flat roller
style to the earlier dual taper style. The sprocket bearing inner
race of the 2003-up sprocket shaft is a non-serviceable item,
per the OEM service manual. Attempting to remove the pressed
on sprocket bearing inner race from the sprocket shaft of 2003
Harley-Davidson® flywheel assemblies can easily result in serious
damage to the flywheel assembly.
a. Sprocket shaft bearings: Use 1999-2002 style taper roller bearings,
included with the crankcase. They must be used with a 1999-2002
style flywheel assembly, purchased separately.
CAUTION
Installing and setting the clearances for 1999-2002 style taper
roller bearings is a critical operation. install and set clearances
per 1999-2002 Harley-Davidson service manual.
NOTES
• S&S crankcases secure the pinion bearing in place with a snap ring.
2003-up Harley-Davidson cases do not.
• 1999-2002 pinion shaft bearing is not compatible with S&S crankcases.
It has a larger outside diameter than the 2003-up style used by the
S&S cases.
8. Camshaft And Cam Plate Installation
S&S Camshafts install using the instructions packaged with them.
Harley-Davidson camshafts install per 1999-2003 Twin Cam 88®
service manual.
9. S&S Reed Valve Installation
The S&S Reed Valve Assembly 31-2071 included with the crankcase
is an effective way to control internal air pressures inside the
crankcase, reducing oil carry over, blow-by, and oil leakage. It is a
one-way valve that allows for the smooth passage of air through
and out of the engine breathing system. Installation of the S&S
Reed valve is optional. It is not required for crankcase assembly.
However, its use is highly recommended. It installs easily, and
requires no extra machining. A separate Instruction sheet is
packaged with the Reed Valve. See Picture 12.
10. Oil Pump, Lifters, Lifter Covers, and Cam Cover Installation
These and any other crankcase components not listed install per
1999-2003 Harley-Davidson® Twin Cam 88® service manual.
S&S Reed Valve assembly and wave washer
8
Use only S&S #31-2325-S stud in S&S crankcases for
Twin Cam 88®. Threaded end with collar is .230"
shorter than OEM studs (clearance requirements)
Picture 12