S&S Cycle Three Piece Flywheel Assemblies for S&S V-Series Engines for 1984-99 Harley-Davidson Big Twins - Manual (Page 3)

NOTE: S&S recommends that Timken® bearing end play be checked before
final assembly of the flywheels in the crankcases. The simplest way to do
this is to make a “slip-fit" test sprocket shaft. Turn the diameter of a used
sprocket shaft down about .002" so that the Timken bearing will slide
easily over it for this test. Weld a vise tab on the flywheel end of the shaft so
it can be held securely in a large vise. See Picture 2.
11. Clamp the test shaft in a vise with the shaft pointing straight up.
12. Slide the inner bearing over the test sprocket shaft.
13. Put the left crankcase half over the inner bearing. Do not oil the
bearings for this test.
14. Slide the Timken bearing spacer over the test shaft followed by the
outer bearing.
15. Load the bearing with either a sprocket shaft nut and spacer or a
bearing installer tool.
16. Attach a dial indicator to the crankcase and place the indicator on
the sprocket shaft. Check the amount of endplay in the bearing by
moving the crankcase up and down, noting the readings on the
dial indicator.
17. Endplay should be between .001" and .005". If endplay is less than
.001" a thicker spacer must be used. If endplay is greater than .005"
a thinner spacer must be used. A thinner spacer will produce less
endplay. When the bearing end play is within specification, the
flywheels may be installed in the crankcases.
18. Support the flywheel assembly in a stand with the sprocket shaft
straight up. A coffee can or small bucket works well for this.
19. Use a sprocket shaft bearing installation tool (such as S&S PN 53-
0060) to press the inner bearing onto the sprocket shaft against the
flywheel. See Picture 3.
20. Place the left crankcase half over the sprocket shaft.
21. Install the Timken bearing spacer and position the outer Timken
bearing on the shaft.
22. Use a sprocket shaft bearing installation tool to press the bearing,
shaft and case together.
23. Turn the left crankcase and flywheel assembly over so the pinion
shaft is straight up. Support the crankcase half so it is stable.
24. Lubricate both the pinion shaft and new bearing with assembly
lube and slide the bearing in place. Install a new snap ring with the
rounded edge facing up using snap ring pliers. See picture 4.
25. S&S® uses and recommends Threebond® 1194 to seal crankcases.
Apply a consistent thin coat to both cases, taking care not to get
any material in a place where it could get into the engine.
26. Allow sealant to cure per the manufacturers instructions and install
the right crankcase half.
BT BEARING PINION SHAFT BEARING DIAMETER
RACE DIAMETER 1.2498–1.2500 1.2500–1.2502
1.7511 to 1.7513 Red S&S® 31-4017
(H-D®# 24641-87A) Blue S&S 31-4018
(H-D®# 24643-87A)
1.7509 to 1.7511 Blue S&S 31-4018
(H-D®# 24643-87A) White S&S 31-4005
(H-D®# 24626-87A)
1.7507 to 1.7509 White S&S 31-4005
(H-D®# 24626-87A) Green S&S 31-4016
(H-D®# 24628-87A)
3
Picture 3
Picture 4
Picture 2