
381500/7
381505/7
3815110/7
Ei" ""
ef
3
1
•j)
Fig. 38
Reaming small end bush.
• Interpose spacer washer between tool and clamp,
Escariado casquillo pie de biela.
• Arandela de separaci6n entre soporte y util.
120
m) Run the reamer 381500 /7 through again
( for the first oversiz. operation, run through
the reamer 381505 /7 and for the second
oversizi ng operation the reamer 3815 l 0 /7).
To facilitate the flow of lubrication when the engine
is functioning, on fitting the wrist pin and small end
bush execute four
«
lead chamfers
»
as indicated in
fig. 39.
If available it is preferable t�at this operation be
carried out on a machine using the milling cutter as
indicated: however a rat tail file of dia. 2.5 to 3
mm can be used to obtain the required results.
Having completed the operation carefully clean the
machined area as so as to remove all the residual
swarf. Control the con rod small end bore using the
plug T.16160/C (for normal bore); T.16161/C (for
1st o/s); T. 16763/C (for 2nd o/s): the plug gauge
when introduced should slide in gently under hand
pressure.
OversiEed wrist pin: For assembling the l st o/s
wrist pin, rough and finish ream the wrist pin hou
sing on the piston, respectively with the reamer
381504 and 381505 ; during this operation it is
advisable to use the work holder ( with centres for
the piston which maintains the latter components
bore axis in a fixed position) T. 0020897.
For the 2nd o/s wrist pin the reamers to use cor
r e s po n d respectively to the drg. Nos. 381509 -
3815 l 0.
0
Summary of Contents for Vespa 1955
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Page 34: ......
Page 36: ...n l n I Ii I J 01...
Page 60: ...Fig 2 C C D B Fig 3 11 Fig 4 I I C 0...
Page 71: ...i t fr er it idrt _ d rt roct c 0 u TOOLING HERRAMIENTAS r c et m lhiI C a C c i i...
Page 72: ...If...
Page 91: ...1 l 0 DISMANTLING DESMONTAJE n1 I s 2t wzrc zter zilft m e z a r l s i I t I I...
Page 92: ...0...
Page 104: ...Crankcas h e alf clutch d SI e DESMONTAJE Ver fa P ag 78 M N...
Page 115: ...r 1 kt b tt 2 d rt tttfc 0 ASSEMBLY PLAY OVERHAULS JUEGOS DE MONTAJE REVISIONES I I II i ci...
Page 116: ...0...
Page 199: ...c REASSEMBLY MONTAJE...
Page 200: ...0 I...