URAL Motorcycles 750cc Series, Руководство по ремонту

Страница: 46 / 99

Measure the radial play in the connecting rod big end with the help of indicator by resting the
feeler pin on the big end in the centers (Fig. 35).
The radial play should be within 0.10 mm. If otherwise, change the crankshaft. Measure the axial
play between the crankshaft cheeks and the connecting rod big end using the feeler; the play
should be within 0.20 to 0.34 mm (Fig. 36).
Measure the run-out of crankcase main journals relative to each other in centers using an
indicator. The run-out shall be within 0.05 mm (Fig. 37). Should the actual run-out exceed this
value; the crankshaft has to be straightened out.
The pointers of both indicators should deviate in the same sense, i. e. positive or negative (Fig.
37,
2 and 3). If the indicator pointers read different values (Fig. 37, 1 ) change the crankshaft.
If the pointers of indicators read the same negative deviation, which exceeds the tolerated value,
change the crankshaft.
Fig. 35
Measuring the radial play of the connecting rod
Fig. 36
Measuring the runout of the connecting rod
Fig. 37
Measuring the runout of crankshaft necks
46