Maintenance; Checking The Fuel Supply - APRILIA SL Mille Workshop Manual

FUEL SUPPLY SYSTEM
4.1.1 MAINTENANCE
• When the fuel supply pump is to be removed, see 4.3
(REMOVING THE WHOLE FUEL SUPPLY PUMP
UNIT), it is advisable to make sure the pipes (1 - 2) are
intact and that the following are working properly:
- fuel level sensor (3), see 6.10.2 (LOW FUEL WARN-
ING LIGHT);
- fuel supply pump (4), see 6.5.2 (CHECKING THE
FUEL PUMP).
• Change the delivery filter (5).
NOTE
During this procedure, it is also advisable to
wash the tank completely.
4.1.2 CHECKING THE FUEL SUPPLY
Check the fuel pipes every 7500 km (4687 mi) or 8
months; replace every 4 years.
Check the delivery pipe (6), return pipe (7) and rele-
vant connections extremely carefully; the operating
pressure of the delivery pipe (6) is approx. 450 kPa
(4.5 bar).
Any fuel pipes featuring cracks or cuts must be replaced,
without exception.
Fuel leaking from the flange (8) might be due to a dam-
aged O-ring (9), consequently:
• Remove the whole fuel supply pump unit, see 4.3 (RE-
MOVING THE WHOLE FUEL SUPPLY PUMP UNIT),
check its state of repair and, where necessary, replace
it.
• Open the filler cap and make sure the vent on the tank
is not clogged. Where necessary, unclog it using a
compressed air jet.
NOTE
For further details see 6.5.2 (CHECKING THE
FUEL PUMP).
SL mille
11-4-00
Release 00/2001-05