FUEL
PUMPS
All K o h l e r T w o C y l i n d e r E n g i n e s h a v e a mounting pad a n d p r o v i s i o n o n t o p of c r a n k c a s e f o r a
m e c h a n i c a l l y o p e r a t e d f u e l pump. M e c h a n i c a l f u e l p u m p s a r e f u r n i s h e d b y K o h l e r - - c e r t a i n a p p l i c a t i o n s
u s e p u l s e p u m p s w h i c h a r e f u r n i s h e d
t h e e q u i p m e n t m a n u f a c t u r e r . T h e m e c h a n i c a l pump o p e r a t e s
off a c a m on t h e c a m s h a f t .
T h e f u e l p u m p l e v e r r i d e s o n t h e c a m a n d t r a n s m i t s t h i s m e c h a n i c a l a c t i o n
t o a d i a p h r a g m w i t h i n t h e pump body.
M o s t m e c h a n i c a l p u m p s h a v e a n e x t e r n a l l e v e r f o r p r i m i n g .
R e p a i r k i t s a r e a v a i l a b l e f o r r e c o n d i t i o n i n g fuel p u m p s .
Reconditioning P r o c e d u r e
1.
R e m o v e f u e l l i n e s a n d mounting s c r e w s holding p u m p t o e n g i n e .
2.
With a f i l e , m a k e a n indicating m a r k a c r o s s a point a t the union of f u e l pump body and
c o v e r . T h i s is a p o s i t i v e m a r k i n g t o a s s u r e p r o p e r r e a s s e m b l y . R e m o v e a s s e m b l y
s c r e w s a n d r e m o v e c o v e r .
3 .
T u r n c o v e r o v e r a n d r e m o v e valve
s c r e w a n d w a s h e r . R e m o v e v a l v e r e t a i n e r , v a l v e s ,
valve s p r i n g s a n d v a l v e g a s k e t , noting t h e i r p o s i t i o n . D i s c a r d valve s p r i n g s , v a l v e s and
valve r e t a i n e r g a s k e t .
4 .
C l e a n f u e l h e a d thoroughly with s o l v e n t and a f i n e w i r e b r u s h .
5.
Holding p u m p c o v e r with d i a p h r a g m s u r f a c e u p , p l a c e new valve g a s k e t i n t o the cavity.
Now a s s e m b l e the valve s p r i n g a n d v a l v e s into the c a v i t y and r e a s s e m b l e valve r e t a i n e r
a n d l o c k i n p o s i t i o n by i n s e r t i n g a n d tightening f u e l pump valve r e t a i n e r s c r e w .
6 .
P l a c e p u m p c o v e r
i n a c l e a n p l a c e a n d r e b u i l d t h e l o w e r d i a p h r a g m s e c t i o n .
7 .
Holding m o u n t i n g b r a c k e t , p r e s s down on t h e d i a p h r a g m t o c o m p r e s s s p r i n g u n d e r i t , then
t u r n b r a c k e t
t o unhook d i a p h r a g m s o i t c a n b e r e m o v e d .
8.
C l e a n m o u n t i n g b r a c k e t with a s o l v e n t and a f i n e w i r e b r u s h .
9 .
R e p l a c e t h e d i a p h r a g m o p e r a t i n g s p r i n g , s t a n d new s p r i n g in c a s t i n g , p o s i t i o n d i a p h r a g m
a n d p r e s s down on d i a p h r a g m t o c o m p r e s s s p r i n g a n d t u r n
it 9 0 " t o r e c o n n e c t d i a p h r a g m .
10.
Hold mounting b r a c k e t , t h e n p l a c e the pump c o v e r o n i t ( m a k e s u r e t h a t indicating m a r k s
a r e i n l i n e ) a n d i n s e r t the s c r e w s . DO NOT TIGHTEN.
With the hand o n the mounting
b r a c k e t only, p u s h the pump l e v e r t o the l i m i t of i t s t r a v e l a n d hold i n t h i s p o s i t i o n while
tightening the f o u r s c r e w s . T h i s
is
i m p o r t a n t t o p r e v e n t s t r e t c h i n g the d i a p h r a g m .
11.
Mount t h e f u e l p u m p on e n g i n e , u s i n g the new mounting g a s k e t s . R e c o n n e c t the f u e l l i n e s .
