BI620114
Service Manual
5)
over the methane head the low alarm display LED on the display will light up as a warning but the engine keeps running. If a 1.25% or higher calibrated test gas is passed over the methane sensor, the low and high alarm display LEDs and the run solenoid display LED on the display will light up and the engine will shutdown. Remove the cap to allow fresh air to pass over the sensor: The sensor will continue checking for methane. Once no methane is registered the high and low warning display LEDs will go out, the solenoid will power up and the run solenoid display LED on the display will go out leaving only the charge failure display LED on. Pilot air pressure is then supplied to the shut off valve. The engine is now ready to be restarted.
FAULT DIAGNOSIS GUIDE The electronic shutdown system is designed to stop the engine whenever something endangers the machine or the operator. There can be various such events. If the engine suddenly stops, the display LEDs will probably indicate what is wrong. With the electronic shutdown system switched on and the engine not running, the oil pressure, the coolant circulation, the solenoid and the charging display LEDs must be on, so ignore them. They are only important when the engine is running. Following examples of fault diagnosis: 1) Engine stops, all display LEDs go out: This is likely to be a wire break in the power supply line or in the start/reset line. 2) Engine stops, some display LEDs are still on: This may be due to a fault in the solenoid circuit. The solenoid display LED will be on when the engine has stopped, but if the on/off toggle switch is toggled (i.e. electronic shutdown system powered down and up again), the solenoid display LED on the display should go out after 17 seconds. If it does not, the fault is in the solenoid wiring or in the solenoid itself. 3) Engine stops, some display LEDs are still on: Look for a display LED that should not be on, because the stop is likely to be due to one of the field sensors tripping. Check which display LED is on beside the four that signal the engine has stopped. The electronic shutdown system does not differentiate between a sensor signaling alarm and its wire or connection breaking. First check whether the alarm is valid (is engine or gas temperature high or coolant low etc.). A display LED may also be flashing. This means that the fault is in the wire to the relevant sensor, e.g. a short between the wires, and a short to frame. If a display LED is flashing, examine the appropriate wire. 4) Engine stops, some display LEDs are still on: Look for a display LED that should not be on. If there is not one, trouble is likely to be due to either the oil pressure or the coolant circulation sensors. Toggle the on/off toggle switch and try starting the engine again. The engine should run for about 25 seconds even if there is no oil pressure and/or no coolant circulation. Watch the oil pressure gauge. If that is in order but the engine still stops after 25 seconds, it is likely that coolant circulation has stopped. 5) Engine stops, one or both methane alarms flash: This means that either the methane detector itself is faulty, or its cable is damaged. 6) Engine keeps running, but all display LEDs flash: This means that the battery voltage is low. Attention to the battery and charging is required.
FAULT
CAUSE
REMEDY
Engine stops and all LEDs go out.
Wire break battery supply line. Wire Check and replace damaged cables. break between electronic shutdown system start/reset pressure switch and main control board.
Engine stops and all LEDs go out.
Internal electronics problem with Remove and replace main control assembly main control assembly. and return to Bucyrus for repair.
Engine stops methane high and low Faulty methane sensor or cabling. alarm LEDs flashing.
296
FBL-10 LHD/Utility Serial No. 1600
Check cable to methane sensor if it is OK replace the methane sensor and return the damaged sensor to Bucyrus for repair.
rev 2
