Mines safety alert no. 369 | 04 December 2019 | Version 1
The engine fuel system was a unit pump design with a common fuel rack connecting all unit pumps.
Each unit pump was timed with the fuel rack to ensure the fuel quantity control was uniform across all cylinders. The fuel rack was located within the engine block. During normal operation, when the engine stop solenoid is de-energized, the governor moves the fuel control rack into the no fuel position and the fuel rack defaults to the full fuel position when the engine is not running but ready to start. The governor controls the engine speed with the fuel rack position once the engine starts.
On starting the engine, the speed governor, stop solenoid, E-stop and throttle control did not have any impact on the engine speed or stop the engine due to the fuel rack being jammed in the full fuel position.
2. OEM or OEM equivalent parts (including bolts and fasteners) should be used when conducting repairs and maintenance on critical or safety systems.
3. The OEM instructions should be followed when conducting repairs that are unfamiliar, complex or to critical systems (such as the fuel system).
4. Audit fuel systems on mobile plant for damage, fuel leaks or residual fire hazards.
Investigations are ongoing and further information may be published as it becomes available. The information in this publication is what is known at the time of writing.
We issue Safety Notices to draw attention to the occurrence of a serious incident, raise awareness of risks, and prompt assessment of your existing controls.
Contact: Trevor Brown, Acting Deputy Chief Inspector (Mineral Mines and Quarries) , +61 7 4447 9253 QldMinesInspectorate@dnrme.qld.gov.au
Issued by Queensland Department of Natural Resources, Mines and Energy
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All information on this page (Fire on explosive charge vehicle while at a charged face - https://www.rshq.qld.gov.au/safety-notices/mines/fire-on-explosive-charge-vehicle-while-at-a-charged-face) is correct as of time of printing (Mar 29, 2024 4:40 am).