Inspecting the crankcase halves
- Before proceeding to check the crankcase
halves, thoroughly clean the all surfaces and oil
ducts.
- On the transmission-side crankcase half, take
particular care when handling the oil pump com-
partment and the oil ducts, the by-pass duct, the
main bushings and the cooling jet on the trans-
mission side (see diagram).
- Take particular care, also, that there are no signs
wear in the oil by-pass valve housing (see Chapter
Lubrication), as this could prevent a good seal in
the valve, which regulates the oil pressure.
- On the flywheel side crankcase half, take partic-
ular care cleaning the oil ducts for the main bush-
ings, the oil duct for the jet that lubricates the
cylinder head and the oil drainage duct at the fly-
wheel side oil seal.
- Inspect the coupling surfaces on the crankcase
halves for scratches or deformation, taking partic-
ular care with the cylinder/crankcase surfaces and
the crankcase halves surfaces.
- Defects in the crankcase coupling gasket be-
tween the crankcase halves or the mating surfaces
shown in the diagram, could cause a drop in the
oil pressure lubricating the main bearings and con-
nection rod.
- Check the main bearing seats that limit axial
clearance in the crankshaft show no signs of wear.
The dimension between these seats is measured
by way of the procedure described previously for
measuring the crankshaft axial clearance and di-
mensions.
N.B.
THE JET IS FED THROUGH THE MAIN BUSH-
INGS. PROPER OPERATION OF THIS COMPO-
NENT IMPROVES THE PISTON TOP COOLING.
CLOGGING HAS EFFECTS THAT ARE DIFFI-
CULT TO DETECT (PISTON TEMPERATURE
INCREASE). FAILURE OR LEAK CAN CONSID-
Engine
Vespa GTS 250 I.E.
ENG - 52
Содержание GTS 250 I.E.
Страница 1: ...WORKSHOP MANUAL 633577 Vespa GTS 250 I E ...
Страница 4: ......
Страница 6: ......
Страница 7: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 19: ...INDEX OF TOPICS TOOLING TOOL ...
Страница 32: ...Tooling Vespa GTS 250 I E TOOL 14 ...
Страница 33: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 47: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 51: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 56: ...Front side 1 Saddle opening switch 2 Wirings Electrical system Vespa GTS 250 I E ELE SYS 6 ...
Страница 90: ... Refit the battery cover Connectors Electrical system Vespa GTS 250 I E ELE SYS 40 ...
Страница 91: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 98: ...Engine from vehicle Vespa GTS 250 I E ENG VE 8 ...
Страница 99: ...INDEX OF TOPICS ENGINE ENG ...
Страница 156: ...Engine Vespa GTS 250 I E ENG 58 ...
Страница 164: ...Engine Vespa GTS 250 I E ENG 66 ...
Страница 165: ...INDEX OF TOPICS INJECTION INJEC ...
Страница 168: ...Injection Vespa GTS 250 I E INJEC 4 ...
Страница 184: ... REMOTE CONTROLS CONTROL UNIT FUSES ETC Injection Vespa GTS 250 I E INJEC 20 ...
Страница 198: ...Components location Injection Vespa GTS 250 I E INJEC 34 ...
Страница 204: ...Injection Vespa GTS 250 I E INJEC 40 ...
Страница 215: ...Schema valido dal numero di telaio ZAPM4510000001579 in poi Vespa GTS 250 I E Injection INJEC 51 ...
Страница 218: ...Injection Vespa GTS 250 I E INJEC 54 ...
Страница 219: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 240: ...Suspensions Vespa GTS 250 I E SUSP 22 ...
Страница 241: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 257: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Страница 260: ...Cooling system Vespa GTS 250 I E COOL SYS 4 ...
Страница 261: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 273: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Страница 277: ...INDEX OF TOPICS TIME TIME ...
Страница 279: ...Crankshaft CRANKSHAFT Code Action Duration 1 001117 Crankshaft Replacement Vespa GTS 250 I E Time TIME 3 ...
Страница 317: ...Stickers TRANSFERS Code Action Duration 1 004159 Plates Stickers Replace ment Vespa GTS 250 I E Time TIME 41 ...