Refitting The Crankcase Halves - VESPA GTS 250 I.E. Workshop Manual

Vespa GTS 250 I.E.
Crankcase Engine half
halves
Cat. 1
Cat. 2
Cat. 1
Cat. 2
N.B.
TO KEEP THIS POSITION OF THE BUSHINGS
ON THE CRANKCASE, FITTING IS FORCED ON
STEEL RINGS INSERTED IN THE CASTING OF
BOTH CRANKCASE HALVES.
N.B.
DO NOT TAKE THE MEASUREMENT ON THE
TWO HALF-SHELL COUPLING SURFACE
SINCE THE ENDS ARE RELIEVED TO ALLOW
BENDING DURING THE DRIVING OPERATION.
N.B.
CRANKCASES FOR REPLACEMENTS ARE
SELECTED WITH CRANKCASE HALVES OF
THE SAME CATEGORY AND ARE FITTED
WITH CATEGORY B BUSHINGS (BLUE)
Characteristic
Standard driving depth
1.35 ÷ 1.6
Diameter of crankcase without bushing
32.953 ÷ 32.963

Refitting the crankcase halves

- Fit the internal bulkhead by locking the two
screws to the prescribed torque.
- Fit the oil filter fitting and tighten it to the specified
torque.
- Position the oil pre-filter element as shown in the
photograph.
- Place a new gasket on one of the crankcase
halves, preferably on the transmission side, to-
gether with the locating dowels.
- Lubricate the main bushings and insert the crank-
shaft in the transmission side crankcase half.
- Reassemble the two crankcase halves.
Bushing
shaft
Cat. 1 B
Cat. 2 B
Cat. 2 A
Cat. 1 C
Engine
ENG - 55