Compressed Air System - Gilera Runner RSTPurejet Service Manual

Runner RST Purejet
Specific tooling
020460Y Scooter diagnosis and tester
020330Y Stroboscopic light for timing control
020621Y HV cable extraction adaptor

compressed air system

Direct injection in the cylinder takes place by pressure of the compressed air. The injection pressure is
vital to ensuring the correct fuel preparation and pulverisation of the mix.
The system consists of the following components:
- Volumetric compressor
- Injectors support
- Connecting union
- Fuel pressure regulator control chamber
- Air injector
The mechanical installation of these components is described in the chapter relating to engine. This
section of the manual deals with the pneumatic inspections on the system.
To perform pneumatic inspections on the compressed air system, proceed as follows.
1- Remove the air supply duct of the injectors and install the air pressure control kit
GO TO point 2
N.B.
BE VERY CAREFUL WHEN CLEANING THE PARTS AND MAKING THE PROPER CONNECTION
OF UNIONS. ANY IMPURITY MAY DAMAGE THE AIR INJECTOR. AVOID REMOVING THE RUB-
BER HOSE FROM THE BRASS HOSE HOLDERS. IF REQUIRED, REPLACE THE HOSE.
Specific tooling
020617Y Air pressure check kit
2- Remove the following electrical connectors:
- Air injector
- Fuel injector
- H.V. coil
Remove the ignition spark plug.
GO TO point 3
3- Connect the scooter diagnostic tester. Select
the parameters function. Start the starter for 15
seconds and check the following:
Engine rpm > or = 500 RPM
Air pressure at the end of test > or = 4 BAR
YES point 5 NO point 4 NO point 6
pure jet injection
INJ PJ - 39