S&S Cycle Crankcase for Harley-Davidson Twin Cam 88 Engines User Manual

Page 4

iv. Install the vent hose and clamp (S&S PN 50-8156-S or 50- 8076-S)

on the new fitting.

NOTE: The stock vent hose is reused in this step.

v. Position a drain container in front of the oil pan. Next, locate and

remove the two plugs on the forward face of the oil pan allowing
the oil to drain. Once the oil is completely drained, replace the
3/8” pipe-plug with a 90-degree fitting (S&S PN 50-8288). Position
barb of fitting toward right side of bike at an angle slightly above
horizontal as shown in Picture 2. Next, install the oil return fitting
(S&S PN 50-0451) with O-ring (S&S PN 50-8008) in the drain plug
location.

vi. Remove cover plate that was shipped on crankcase from the

bottom surface of the rear motor mount. The oil line block will be
installed in this location. Assemble the oil line block by installing
the 90˚ fitting (S&S PN 106-1170) and the oil return fitting (S&S PN
50-0451) with O-ring (S&S PN 50-8008) into the block, as shown
in Picture 3.

vii. Mount the oil line block on the crankcase using 5⁄16-18 x 13⁄4" long

screw (S&S PN 50-0437)—do not final tighten as it will be removed
again.

viii. The next step is to measure and then cut the oil hoses. The straight

hose connects the 90˚ fittings of the oil line block and oil pan. The
bent hose runs between the oil return fittings on the oil line block
and oil pan. See Picture 4.

ix. Remove the oil line block from the engine case. Install the supplied

clamps (S&S PN 50-8293) on the lines between the fittings. See
Picture 5.

Picture 1

Picture 2

Picture 3

Picture 4

Picture 5