Gilera SATURNO BIALBERO 350, Workshop Manual

Page: 73 / 140

CRANKCASE - GEARBOX -
CRANKSHAFT COMPONENTS 10
Crankcase
Accurately measure the internal diameter of each main journal with a
micrometer.
Diameter at mounting = 40.030 ÷ 40.046 mm.
Once the bearing and main journal internal diameter is known, it is
possible to calculate the gap of the two components.
Clearance at mounting = 0.030 ÷ 0.059 mm.
Max. clearance = 0.080 mm.
If it is necessary to replace the gearbox shaft rolling bearings, selector
drum and balance shaft, the cases must be heated uniformly (it is
recommended the use of an oven at 130°C, in order to avoid warpage).
Use extractor 19.1.20528 to remove the left case roller cage.
REASSEMBLY
Assemble in reverse order of disassembly. Pay close attention to the
following points:
Crankshaft, balance shaft and gears are all mounted in the left
crankcase.
Use Loctite 574 on the contact surface of the two cases.
The crankshaft thrust ring is installed in the right case (with the antifriction
surface side facing the shaft) and so is the selector drum spacer washer.
Hold these components in with a little grease.
Crankshaft axial clearance must be between 0.05 and 0.25 mm; if
necessary replace worn thrust rings with new ones.
To mount the oil seals, use a proper hollow punch; be careful not to
damage the lip seal by pits or grooves on the shaft (in such cases, it is
best to use a conical guide protection).
Oil the oil seal lips with engine oil.
TORQUE WRENCH SETTINGS
Connecting rod cap mounting nuts: 28 ÷ 32 Nm.
Lubricate threads.
10 – 3,2