CLAS AC 5280 Mode D'emploi page 7

AC 5280
8-CYLINDER COMMON RAIL INJECTOR TESTER
INSTRUCTIONS
1. Most modern diesel vehicles are tted with a sound deadening cowling over the
top of the engine. If remove this cowling to gain access to the engine.
2. Direct Connection Tubes (Bosch connectors only)
These tubes are ideal for a vehicle which will not start, and provide a very quick
assessment.
2.1. The return pipes are retained by wire clips, remove the clips and store
in a safe place. Gently ease out each of the return pipes from the injectors ( g.2).
Take care not to break the connectors as they can be brittle.
2.2. Plug the ends of the return pipes to avoid any spillage.
2.3. Connect the tubes to each injector ( g.3), the wire clips are not required as the return system
is low pressure.
2.4. Crank over the engine until the tubes are at least 50% full. Take care, that
should the engine start, the tubes will ll up very quickly.
2.5. Check the levels for each injector. The overall variation in the levels
should be less than 10%. Any injector which has a back leakage problem will have
more diesels in the tube.
2.6. Remove the tubes from the injectors, taking care not to spill any diesel,
place a nger over the end of the tube to hold the liquid in the tube and then empty
into a suitable container.
2.7. Re t the return pipes to the injectors and secure them with the wire clips
as per the vehicle manufacturer's workshop manual.
3. Flexible Tube, Adaptors and Bottles
These will provide a more accurate reading as the engine can be left running for longer.
3.1. Remove the return pipes from the injectors. Refer to the appropriate vehicle manufacturer's
workshop manual.
3.2. Connect the appropriate, Bosch, Delphi or Denso adaptors to the exible tubes.
3.3. Connect the exible tubes to each injector and hang the bottle rack in a suitable position.
3.4. Start the engine (or crank over if it will not run), run until the one of the bottles is approximately
75% full, and stop the engine.
3.5. Check the levels for each injector. The overall variation in the levels should be less than 10%.
Any injector which has a back leakage problem will have more diesels in the tube.
3.6. Remove the tubes from the injectors, taking care not to spill any diesel, if possible lower the
bottle rack to a level below that of the injectors or raise the exible tube, so that the uid in the tubes drains
into the bottles.
3.7. Re t the return pipes to the injectors as per the vehicle manufacturer's workshop manual.
NOTE: This system is designed to give a quick assessment of the return ow of the injectors; it is unable to
determine all of the factors which may affect the operation of the vehicle.