Briggs & Stratton Vanguard 10V300, Руководство по ремонту

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NOTE: See Figure 66. Install connecting rod cap, so
that match marks on connecting rod cap and shank
are aligned.
5. Obtain Telescoping Gauge (Part No. 19485) and
inside micrometer or plug gauge.
6. See A of Figure 67. Measure piston pin bearing bore
diameter at two locations- parallel and perpendicular
to the crankshaft. Replace connecting rod if either
measurement is 0.574 inches (14.573 mm) or more.
7. See B of Figure 67. Measure the crank pin bearing
bore diameter at two locations- parallel and
perpendicular to the crankshaft. Replace the
connecting rod if either measurement is 1.106
inches (28.081 mm) or more.
8. Remove two hex flange screws to release connecting
rod cap.
Assembly
1. Apply clean engine oil to piston pin, piston pin
bosses, and upper connecting rod bearing.
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2. See Figure 68. Place piston over connecting rod end,
so that the notch on the piston crown is on the same
side as the word MAG on the connecting rod shank.
3. Insert piston pin through piston pin bore and upper
connecting rod bearing. Push pin until it contacts
opposite pin boss.
NOTE: Do not reuse piston pin lock ring after it
has been removed. The lock ring may weaken or
become distorted during removal causing it to break
or dislodge during engine operation.
4. Install new piston pin lock ring into pin bore groove,
so that end of the lock ring is 90° from the pick lock
groove. Exercise care to avoid kinking, stretching, or
distorting lock ring. Verify that lock ring is fully seated
in the groove.
CAUTION
Always wear proper eye protection when installing
piston pin lock ring. Slippage can propel the ring
with enough force to cause eye injury.
5. Use compressed air to remove any dirt or dust that
may have settled in the oil drain back holes and
piston ring grooves.
6. Apply clean engine oil to three piston ring grooves.
7. Install the oil control ring into the bottom ring groove.
Proceed as follows:
• See Figure 69. Install expander spring, so that
the gap ends point toward the piston crown.
• See Figure 70. Spiral bottom oil rail into space
below expander spring.
• Spiral top oil rail into space above expander
spring.
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8. Obtain the Piston Ring Expander (Part No. 19340).
NOTE: Always use the piston ring expander to
prevent excessive ring twist and expansion. Over
expansion may cause the ring to crack opposite the
Not for
Reproduction