Generac 86640 - Manual (Page 44)

Inspection (Continued)
Numbers that correspond to the cylinder number are
stamped on connecting rods and connecting rod caps. Pis­
tons, connecting rods, connecting rod caps and bearings
should be installed only in the correct cylinder. DO NOT
COMBINE PARTS FROM DIFFERENT CYLINDERS. When
pressing the piston pin into the connecting rod (Figure 66),
apply oil to the pin and to small end of connecting rod.
CRANKSHAFT:
Place main bearings in their proper position on the
cylinder block. If the crankshaft, cylinder block and main
bearings are to be replaced, you must select proper main
bearing thicknesses.
When either the crankshaft, cylinder block or main bear­
ings are to be re-used, it is necessary to measure main
bearing thickness with Plastigage".
Numbers are stamped on the engine which indicate
cylinder block main journal. Measure each bore separately.
Each crankshaft has stamped numbers which indicate
main journal dimensions. Each journal is measured sepa­
rately.
Select the correct main bearing thickness and order from
the parts breakdown.
Figure 66. Piston Pin Installation
Page 2.6-4