VESPA 946 E4 EMEA 2021 Manual page 181

Vespa 946 E4-E5 EMEA-USA-ASIA (2021-)
CAUTION
CAREFULLY CHECK THE CLEANING OF THE BY-PASS
DUCT.
CHECK THAT THE PISTON SLIDES BY HAND, FREELY
AND WITHOUT STICKING.
CAUTION
IT IS ADVISABLE TO INSERT THE CRANKSHAFT IN THE
FLYWHEEL SIDE CRANKCASE HALF TO PREVENT, WITH
ACCIDENTAL MOVEMENTS DURING INSERTION, THE OIL
PUMP CONTROL TOOTHING FROM DAMAGING THE
BUSHINGS.
Locking torques (N*m)
Engine-crankcase coupling screws
- Complete the coupling operations with the verification of the crankshaft axial clearance.
- Using specific tools to support the dial gauge, verify that the fitting clearance is within the limits.
- Higher clearances are signs of wear of the crankshaft - crankcase supporting surfaces.
Characteristic
Crankshaft-crankcase axial clearance
0.2 - 0.5 mm
Studs
- Using two nuts, fitted as nut and lock nut type,
remove and then drive from the seat.
- Proceed with a thorough cleaning of the threaded
seat on the crankcase.
- Screw the new stud bolts up to the driving depth
indicated.
N.B.
NEW STUD BOLTS DO NOT NEED THREADLOCK, AS
THEY COME EQUIPPED WITH SCOTCH-GRIP.
Characteristic
Driving depth of stud bolts «A»
170 mm+ 0.5
11 to 13
Engine
ENG - 181