Right Crankcase; Crankcase Check - APRILIA RS 125 Euro 4 Service Manual

RS 125 - Tuono 125 - Euro 4
List of extractors to be used with sleeve 020376Y:

RIGHT CRANKCASE

•
Insertion of main shaft bearing: 020439Y+020359Y Removal of the main shaft bearing:
020358Y
•
Insertion of desmo bearing: 020439Y+020357Y Removal of desmo bearing: 020891Y
•
Insertion of secondary shaft roller bearing cage: 020891Y Removal of the secondary shaft
roller bearing cage:020363Y
•
Insertion of countershaft bearing: 020412Y+020358Y Removal of countershaft bearing:
020375Y
LEFT CRANKCASE
•
Insertion of main shaft bearing: 020439Y+020359Y Removal of the main shaft bearing:
020358Y
•
Insertion of desmo roller bearing cage: 020375Y Removal of desmo roller bearing cage: use
universal extractor
•
Insertion of secondary shaft roller bearing cage: 020363Y Removal of the secondary shaft
roller bearing cage: use universal extractor
•
Insertion of countershaft roller bearing cage: 020483Y Removal of countershaft roller bear-
ing cage: 020364Y

Crankcase check

•
Before checking the crankcase halves, thoroughly clean all the surfaces and the oil pipes.
•
For the crankcase half on the transmission side, take particular care when handling the
housing and hoses for the oil pump, the duct with the by-pass valve and the main bushings.
•
As already described in the lubrication chapter, it is especially important that the by-pass
valve housing shows no wear that may impair the proper sealing of the lubrication pressure
adjustment ball.
•
Check that the surfaces are free from dents or deformations, with special attention to both
the crankcase coupling and the cylinder-crankcase surfaces.
•
Defects in the crankcase coupling gasket or the surfaces indicated in the figure can cause
a drop in the oil pressure and affect the lubrication pressure for the main bushings and the
connecting rod.
•
Check that the surfaces that limit crankshaft axial clearance show no signs of wear. To
measure and check sizes follow the procedure described previously for checking crankshaft
axial clearance and dimensions.
Engine
ENG - 193