Boss 36 BHP PISTON Service And Maintenance User Manual page 25

X. Press the tapered roller bearings off of the crankshaft if only the bearings are being replaced. If the
crankshaft is to be replaced, discard the entire assembly.
XI. Press the new bearings into position.
XII. Generously oil the front bearing race and install the front bearing housing with gasket. Torque the
bolts to 180 in-lbs. Torque the bolts as shown in the pattern below.
FIGURE 4. BEARING HOUSING TORQUE SEQUENCE
XIII. Slide the crankshaft into the crankcase. Generously lubricate the bearing race and install the rear
bearing housing and gaskets.
XIV. Install the oil pump.
XV. Install the connecting rods. Thoroughly oil the crankshaft and rods before installing them. When
installing the rods, make certain that the tabs are aligned on the same side of the rod, see Fig. 4.
XVI. Install the pistons, rings and heads. See Piston Ring Replacement on P. 21.
Maintenance
The crankshaft should have new bearings installed. If not, press the new
bearings into position on the crankshaft.
Gasket kits are supplied with two (2) each of .006, .010, .015, and .020
gaskets. Use these rear bearing gaskets in any combination and quantity
to limit all play front to rear, but still allow the crankshaft to turn freely.
FIGURE 5. ROD ALIGNMENT
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