Crankshaft Inspection - Sym DD 50 Service Manual

This chapter Contents
9. CRANKCASE/CRANKSHAFT

Crankshaft Inspection

Measure the clearance of connecting rod big end.
Service limit: 0.60 mm
Measure the radial clearance of connecting rod
big end at X-Y directions as diagram show.
Service limit: 0.04 mm
Place the crankshaft on a V-block, measure
run-out points A and B of the crankshaft with dial
gauge.
B
A
Service limit: A: 0.10 mm
B: 0.10 mm
70mm
37mm
Check the crankshaft bearing by means of
Clearance
turning it with hand. If any noise and bigger
clearance are detected, replace the bearing with
Clearance
new one.
Lateral Radial
9-4