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Attach pressure gauge to air circuit
IN OPERATION
OFF
MINIMUM
MAXIMUM
N.B. Petrol pressure is above 2.5 bar
(DOUBLE CHECK THE MALFUNCTION BEFORE REPLACING ANY PART)
During cranking check the maximum
compressor pressure, blocking the delivery
hose between the pressure gauge fuel rail.
Is it above 4 bar?
NO
YES
Does the pressure stay remain?
YES
Repeat cranking without blocking the
hoses.
Is the air pressure above 2 bar?
PRESSURE VALUES (BAR) FOR THE AIR AND FUEL CIRCUITS
AIR CIRCUIT
aprilia
Check:
- the reed pack
- hoses
- oil seals and bearings
- air injector
NO
- replace air compressor if necessary
If the pressure drops suddenly, check:
hoses
- replace air compressor if necessary
NO
Check:
- the reed pack
- oil seals
- bearings
- O ring and injector housing
NO
- replace air injector if necessary
2 - 5
4.2
÷ 6
< 6.2
FUEL CIRCUIT
+ 2.5 ± 0.2 bar
+ 2.5 ± 0.2 bar
+ 2.5 ± 0.2 bar
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