Dodge Sprinter 2006 Manual page 1691

VA
1 - HIGH PRESSURE PUMP
2 - FUEL TEMPERATURE SENSOR
3 - FUEL SUPPLY TO PUMP ELEMENTS
4 - FUEL ANNULAR PORT
5 - FUEL SUPPLY
6 - FUEL RETURN
HIGH PRESSURE SIDE
A. F illin g th e p is to n : Th e pist on (6) is m oved
down a s a r esu lt of t h e pist on spr in g (7). Th e fu el
su pplied by t h e fu el deliver y pu m p flows a lon g t h e
r in g pa ssa ge (10), t h e va lve disk a n d t h e va lve spr in g
(3) in t o t h e cylin der. Th e ch eck ba ll (4) pr even t s t h e
fu el fr om bein g a ble t o flow ba ck fr om t h e h igh pr es-
su r e pa ssa ge (5) (F ig. 7).
B . P ro d u c in g h ig h p re s s u re : Th e pist on (6) is
m oved u p by t h e r isin g eccen t r ic sh a ft (9) a n d t h e
fu el is com pr essed. Th e va lve (2) disk sh u t s off t h e
deliver y volu m e t o t h e fu el su pply. On ce t h e fu el
pr essu r e in t h e cylin der r ises beyon d t h e pr essu r e
wh ich exist s in t h e h igh pr essu r e cir cu it (5), t h e
ch eck ba ll (4) open s a n d t h e fu el is pu m ped in t o t h e
h igh pr essu r e cir cu it (5) (F ig. 7).
Fig. 6 LOW PRESSURE SIDE
7 - FUEL BLEED PORT
8 - SHAFT LUBRACATION PORT
9 - FUEL PRESSURE RELIEF VALVE
10 - ZERO DELIVERY RESTRICTOR
11- FUEL QUANTITY VALVE
FUEL DELIVERY 14 - 15