CLAS B.LINE AC 5240BL Notice page 6

AC 5240BL
INSTRUCTIONS
1. Most modern diesel vehicles are fi 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 (fi 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 (fi 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 fi 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
fi nger over the end of the tube to hold the liquid in the tube and then empty into a suitable
container.
2.7. Refi 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 fl exible tubes.
3.3. Connect the fl 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 fl exible tube, so that the fl uid in the tubes drains into the bottles.
3.7. Refi 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 fl ow of the injectors; it is unable to determine
all of the factors which may affect the operation of the vehicle.
COMMON RAIL INJECTOR TESTER