JB Conversions 16-1201 HD Super Short SYE Kit for the NP231J - Manual (Page 8)

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15) Install the rear case/pump onto the front case half as shown
(Fig.14a) and install the 10mm bolts (Fig.14b).
FIG: 14a FIG: 14b
16) Place the tone wheel onto the mainshaft as shown (Fig.15). Do not
install the tone wheel in reverse. You will note that at this stage of
assembly, the tone wheel will rest on top of the oil pump. This is not
an issue. Installation of the yoke nut in Step 18 will draw the shaft
upward therefore raising the tone wheel off of the pump surface. You
will also observe that the tone wheel spins freely on the shaft,
however the tone wheel will become stationary upon tightening of the
nut in Step 18.
FIG: 15