Briggs & Stratton Vanguard 430000 User Manual page 58

Figure 5
• Replace if greater than 0.710 in. (18.03
mm) or 0.0004 in. (0.01 mm) out of round.
Check Piston Pin and Connecting Rod
1. Check piston pin (Figure 6).
Figure 6
• Replace if less than 0.708 in. (17.98 mm)
or 0.0004 in. (0.01 mm) out of round.
2. Check piston pin bearing (Figure 7).
Figure 7
• Replace if greater than 17.98 mm (0.708
in.) or 0.01 mm (0.004 in.) out of round.
3. Check crankpin bearing end of connecting
rod (Figure 8).
Figure 8
• Maximum out of round: 0.0008 in. (0.02
mm)
• If out of round exceeds specification
shown, the connecting rod must be
replaced.
4. Check for bent or twisted connecting rod
(Figure 9).
Figure 9
NOTE: Thrust faces must be free of any burrs or
nicks or connecting rod will not lay flat on surface
plate.
• With connecting rod on a surface plate,
any distortion will be evident by a rocking
motion.
• If a 0.002 in. (0.05 mm) feeler gauge can
be inserted at piston pin end of
connecting rod, the rod must be replaced.
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