Briggs & Stratton Vanguard 430000, User Manual

Page: 61 / 159

58
9
Install Crankshaft
1. Install main bearings in cylinder block.
NOTE: Upper bearing has an oil groove
( A , Figure 1) and oil holes ( B ).
Figure 1
2. Install upper main bearings in their respective
saddles.
3. Ensure bearing is seated in saddle and tang
in bearing is aligned with notch in saddle.
Lubricate bearings with engine oil.
4. Install lower main bearings in bearing caps
(Figure 2).
Figure 2
5. Be sure bearing is seated in bearing cap and
tang in bearing is aligned with notch in
bearing cap.
6. Lubricate bearings with engine oil.
7. Install crankshaft with gear facing front of
cylinder block (Figure 3). Take care not to
damage journals or bearings.
8. Install crankshaft shims on No. 3 main
bearings web with grooves facing out.
Lubricate journals with engine oil.
Figure 3
9. Install main bearing caps. Lubricate threads
of screws with engine oil.
10. Install bearing caps in their respective
positions with arrows facing front.
11. Start with Number 3 bearing cap (Figure 4)
and torque bearing caps one at a time in
sequence shown to values listed in Section
14 - Engine Specifications.
Figure 4
12. Recheck crankshaft end play.
• Crankshaft end play - 0.001 - 0.009 in.
(0.025 - 0.23 mm)
NOTE: After torquing bearing cap, make sure
crankshaft rotates freely before proceeding to next
bearing cap.