CF MOTO CF125T-19 2003, Руководство по обслуживанию

Страница: 166 / 241

12 Crankcase crankshaft piston
12
12-1
Overhaul information ····························· 12-1 Crankshaft/piston ··································· 12-4
Troubleshooting ····································· 12-2 Assembly of crankcase ·························· 12-11
Dismantling of crankcase ······················· 12-3
Overhaul information
Operation caution
• Inspection of crankshaft and crankcase must be done after the crankcase is dismantled. Installation of
these parts can only be done after removal of engine from scooter..(
→
chapter 7)
• Following steps are required when dismantling the crankcase. Dismantle in the order shown in different
chapters.
- Engine removal(
→
chapter 7)
-C
ylinder cover
、
cylinder head
、
cylinder body(
→
chapter 8)
- Left side cover
、
CVT system(chapter 9)
-
R
ight side cover(
→
chapter 11)
- E
lectrical starting system(
→
chapter 17)
- L
ubricating system(
→
chapter 4)
• For inspection of piston and piston ring, just remove Cylinder cover
、
cylinder head
、
cylinder body
(
→
chapter 8)
• Do not damage the crankcase mating surfaces during inspection.
• Do not damage the inner surface of cylinder, piston.
Overhaul standard
Tightening torque
Bolt for crankcase flange 12 N. m(1.2kgf.m)
Thread pin for chain tensioning plate 13 N. m(1.3kgf.m)
S t a n d a r d
I t e m
C F 1 2 5 T
—
1 9
C F 1 5 0 T
S e r v i c e l i m i t
A x i a l g a p 0 . 1 6 - 0 . 3 0 4 m m 0 . 5 0 m m B i g e n d o f
c o n n e c t i n g r o d
R a d i a l g a p 0 . 0 0 5 - 0 . 0 1 7 m m 0 . 0 5 m m
C r a n k
- s h a f t
V i b r a t i o n o f c r a n k s h a f t
—
0 . 1 0 m m
I n s t a l l a t i o n d i r e c t i o n “ I N ” m a r k t o w a r d s b r e a t h e r
s i d e
—
O u t e r d i a m e t e r o f p i s t o n 5 2 . 3 7 - 5 2 . 3 9 / 5 7 . 9 7 - 5 7 . 9 9 m m 5 2 . 3 2 / 5 7 . 9 2 m m
I n n e r d i a m e t e r o f p i s t o n p i n h o l e 1 5 . 0 0 2 - 1 5 . 0 0 8 m m 1 5 . 0 4 m m
O u t e r d i a m e t e r o f p i s t o n p i n 1 4 . 9 9 4 - 1 5 m m 1 4 . 9 8 m m
I n n e r d i a m e t e r o f s m a l l e n d h o l e f o
c o n n e c t i n g r o d 1 5 . 0 1 6 - 1 5 . 0 3 4 m m 1 5 . 0 5 m m
C l e a r a n c e b e t w e e n c y l i n d e r a n d
p i s t o n 0 . 0 2 - 0 . 0 4 m m 0 . 0 8 m m
C l e a r a n c e b e t w e e n p i s t o n a n d
p i s t o n p i n
0 . 0 0 2 - 0 . 0 1 4 m m 0 . 0 4 m m
C l e a r a n c e b e t w e e n p i s t o n p i n a n d
c o n n e c t i n g r o d . 0 . 0 1 6 - 0 . 0 4 0 m m 0 . 0 6 m m
P i s t o n r i n g ( 1 ) 0 . 0 2 - 0 . 0 4 4 m m 0 . 0 7 m m C l e a r a n c e
b e t w e e n p i s t o n
r i n g a n d p i s t o n
g r o o v e
P i s t o n r i n g ( 2 ) 0 . 0 2 - 0 . 0 4 4 m m 0 . 0 7 m m
P i s t o n r i n g ( 1 ) 0 . 1 5 - 0 . 3 0 m m 0 . 4 5 m m
P i s t o n r i n g ( 2 ) 0 . 1 0 - 0 . 2 5 m m 0 . 4 5 m m
P i s t o n r i n g g a p
O i l r i n g 0 . 2 - 0 . 7 m m 0 . 9 m m
P i s t o n
I n s t a l l a t i o n d i r e c t i o n o f p i s t o n r i n g M a r k u p s i d e
—