Crankshaft; Assembly Sequence And Precautions; Tolerances Of New Installed Parts - Robin America R1200 Service Manual

HAssembly sequence and precautions
9-4-l CRANKSHAFT
(1)
Fit the crankshaft oil seal guide onto the
crankshaft tip and assemble it with the
crank case as shown in Fig. 9-4-l.
No te: When the oil seal guide is not used, be
careful not to damage the oil seal lip.
(2)
(3)
Mount the woodruff key (for the mag-
neto).
Dimentional tolerance of the crankpin.
.Crankshaft
Crankcase
Oil Seal Guide
External Diameter 24~) Z-03;
I
I
Fig. 942
WTolerances of new installed parts
I Thrust directional tolerance between the cylinder and piston skirt
0.02OL - 0.059L
Clearance between the piston ring joints
0.2L - 0.4L
1
i Top ring 0.09OL - 0.135L
Clearance between the piston rings
! Second ring 0.060L - 0.105L
I
/ Oil ring O.OlOL - 0.065L
Clearance between the connecting rod
major ring and crank pin
1 Clearance between the internal and
s
' external diameters
0.037 L - 0.063 L
1 Side clearance 0.1 L - 0.3L
Clearance between the connecting minor rod edge and piston pin
O.OlOL - 0.029L
Clearance between the piston pin and piston hole i
0.009L - 0.01 OL
Table 94 7
Note: The clearance between the piston and cylinder is checked by measuring the clearance
between the piston and cylinder skirt.
-49-