S&S Cycle Rocker Boxes for 1966-84 Big Twin - Manual (Page 5)

10. Install sealing O-rings (50-7965 front & 50-7966 rear) in their appropriate rocker box bases. See Pictures 9, below left, and 10, below right.
Sealing O-rings must be installed in the correct rocker box or an oil leak will occur. (Picture 10)
11. Carefully align and install upper rocker box on top of lower box. Use caution not to pinch the O-rings. See Picture 11, below left.
12. Carefully pick up assembly and install the two lower rocker cover bolts, (50-0294). (See Picture 12, below right) using 242 Loctite® Torque
bolts to 90-120 in-lbs.
13. Install rocker box on to head. Care should be used to make sure the rocker arms do not get pinched between the valve spring collar and the
rocker box assembly.
NOTES:
•
It is always recommended to verify proper valve stem protrusion when using S&S® rocker boxes in conjunction with any non-S&S components. A valve
stem protrusion of 1.650" is recommended when using S&S rocker boxes; this will allow the use of any camshaft with a maximum lift of .590".
•
S&S shovelhead rocker arms use a 1.5:1 ratio, and are compatible with both external oil lines as well as internal oiling. (Only when used with S&S
shovelhead tappets and tappet blocks PN 33-5451.)
•
S&S rocker boxes will accept most stock and aftermarket shovelhead rocker arms.
If you will be using S&S tappets and tappet blocks (33-5451) you must install the included 1⁄8 Pipe plugs in S&S rocker boxes in place of
your external oil lines.
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Picture 9
Picture 11
Picture 10
Picture 12
CAUTION
CAUTION
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