Dust Control System 45Service Manual – SW8000TroubleshootingDust Control Vacuum Motor will not RunThe dust control hydraulic solenoid valve is normally-active (on when no power is present). So the mostlikely cause is a hydraulic problem, but may also be electrical. Isolate the cause using the following steps:Note: In the decision tree below, all function prerequisites are assumed to be true for the functionto normally be active. For example, the engine is assumed to be at run-speed and the mainbroom is active.Dust control vacuummotor will not runVerify that the mainbroom is runningThe main broom must beactive with the throttle positionsensor out of neutral beforethe vacuum motor will run.Troubleshoot themain broom functionDisconnect the electricalconnector from the S8solenoid. Does thevacuum motor run?Remove the S8 solenoidvalve and examine it fora stuck plunger. Replacethe valve if necessary.Replace thevacuum motorNoNoNoYesNoYesNoYesNoDoneDoneInspect the brown wire fromthe S8 solenoid to the J1-8connector on the controlboard for a short to ground.Turn the machine off. Press andhold the dust control switch, andcheck for continuity between theJ3-1 and J3-10 pins on theribbon cable connector.Yes Repair/replacethe wiringIs the dust controlLED illuminated on thecontrol panel display?Yes Replace the maincontrol boardDoneDoneYes Replace the maincontrol boardDoneReplace thedisplay panelDoneNo
