Draft Details

Contact name:Tania Donovska
Review start date:Sep 21, 2021
Review end date:Nov 20, 2021
Contact email:kelly.yaremko(at)csagroup.org
Draft Scope/Description:


This Standard describes construction and test requirements for new non-rail-bound diesel-powered, self-propelled machines for use in gassy underground coal mines. Note: The working environment of gassy mines is characterized by the presence of methane gas and combustible dust.


This standard does not specify requirements for safety, other than those directly related to the risk of ignition which may lead to an explosion.

This standard is supplementary to, or amendatory of CSA standards M424.0 Underground Mining Mobile Equipment – General Requirements and M424 Diesel powered machines for use in non-gassy underground mines.

Note: See CAN/CSA-M424.0 for general vehicle design, safety and performance requirements.

Note: See CAN/CSA-M424.2 for diesel engine design, safety and emissions requirements.


Braking system performance requirements and proof tests are not included in the Scope of this Standard, except from the standpoint of the reduction of fire and explosion hazards.

Note: See CAN/CSA-M424.3 for brake construction, stopping performance, and test requirements.


The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that the engine may be operated are:

temperature -20°C to +60°C

pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and   

air with normal oxygen content, approximately 21% v/v.


In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but

not required; and “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

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