EXPANDER
O I L CONTROL RING
W r o n g
SPIRAL R A I L
INSTALLATION
I
FIGURE 1 0 - 8
--
INSTALLATION OF
O I L CONTROL RING WITH SPIRAL R A I L
PISTON
-
PISTON RINGS
I f the c y l i n d e r block does
need
and i f t h e o l d p i s t o n i s within wear l i m i t s and f r e e of
score o r s c u f f marks, i t may be reused.
Do n o t reuse
r i n g s , however.
Oversize p i s t o n s and r i n g
s e t s a r e a v a i l a b l e i n
and
s i z e s f o r use with
c y l i n d e r s .
oversize
p i s t o n s a r e a v a i l a b l e and a r e used with t h e standard s i z e s e r v i c e r i n g s e t .
2 .
R e m o v e old r i n g s with r i n g e x p a n d e r a n d c l e a n up g r o o v e s .
3 .
B e f o r e i n s t a l l i n g new r i n g s on p i s t o n , p l a c e e a c h r i n g i n t u r n in i t s running a r e a i n c y l i n d e r b o r e
and c h e c k e n d c l e a r a n c e .
4.
Rings m u s t b e i n s t a l l e d a c c o r d i n g t o m a r k i n g s on r i n g s . G e n e r a l l y c o m p r e s s i o n r i n g s m u s t b e
i n s t a l l e d with g r o o v e o r b e v e l up when t h i s i s on i n s i d e d i a m e t e r of ring.
T h e c h r o m e plated
r i n g , when u s e d , m u s t be i n s t a l l e d i n the top g r o o v e . When the b e v e l
is
on o u t s i d e of r i n g ,
i n s t a l l in down p o s i t i o n o r t o w a r d the p i s t o n s k i r t . R e f e r t o F i g u r e
10-7
f o r t y p i c a l r i n g t y p e s
and i n s t a l l a t i o n i n g r o o v e s . Ring i n s t a l l a t i o n i n s t r u c t i o n s a r e a l s o included with new r i n g s e t s
e i t h e r p r i n t e d o n the c a r t o n o r on a p r i n t e d s h e e t included i n c o n t a i n e r . F o l l o w i n s t r u c t i o n s
c a r e f u l l y .
Use r i n g e x p a n d e r t o
r i n g s and c h e c k s i d e c l e a r a n c e of e a c h r i n g a f t e r i n s t a l -
l a t i o n . Be c a r e f u l not t o o v e r e x p a n d r i n g s when i n s t a l l i n g on p i s t o n .
PISTON
-
ROD ASSEMBLIES
N o r m a l l y v e r y l i t t l e w e a r t a k e s p l a c e i n t h e p i s t o n b o s s - p i s t o n a r e a .
If
t h e o r i g i n a l p i s t o n and
connecting r o d c a n b e r e u s e d a f t e r r e c o n d i t i o n i n g , t h e p i n w i l l u s u a l l y not h a v e t o b e r e p l a c e d .
If t h e p i s t o n b o s s o r connecting r o d s m a l l end is w o r n beyond l i m i t s , u s e a n e w p i s t o n - r o d
r a t h e r t h a n r e w o r k t h e old p i s t o n b o s s a n d connecting rod.
A
new p i s t o n pin should h e u s e d
w h e n a n e w c o n n e c t i n g r o d i s u s e d with t h e o r i g i n a l piston.
A f t e r c h e c k i n g pin, r o d a n d p i s t o n b o s s t o m a k e s u r e p r o p e r c l e a r a n c e s a r e a v a i l a b l e ,
p i s t o n t o r o d with p i n (light i n t e r f e r e n c e t o t o o s e fit) a n d lock p i n with
r e t a i n e r s - - m a k e s u r e
r e t a i n e r s a r e fully e n g a g e d i n g r o o v e s .