CSA M424.2:22

Preface

This is the third edition of CSA M424.2, Diesel-powered machines for use in non-gassy underground mines . It supersedes the previous editions published in 1990 and 2016. Changes to this edition include:

a) the Scope has been expanded to include larger and more varied types of diesel-powered machines;

b) non-engine related general machine safety requirements have been transferred to CSA M424.0;

c) engine emissions testing pass/fail criteria have been lowered to reflect modern technologies;

d) EQI concept for ventilation rate determination has been removed;

e) ventilation rate determination for retrofit emission control devices has been enabled; and

f) various Clauses throughout the Standard have either been updated or renumbered to comply with current administrative requirements.

CSA group acknowledges that the development of this Standard was made possible, in part, by the financial support of CanmetMINING, Lands and Minerals Sector, Department of Natural Resources Canada. This Standard was developed by CSA Group with funding support provided by the Canadian Association of Administrators of Labour Law – Occupational Safety and Health (CAALL-OSH), including provincial and territorial governments, as well as the Government of Canada. CSA Group is solely responsible for the content of this Standard, and CSA Group and the funding bodies disclaim any liability in connection with the use of the information contained herein.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Scope

1.1 Inclusions This Standard describes the technical requirements and procedures necessary for the design, performance, and testing of new or unused diesel engines for use in non-gassy underground mines. Note: See CSA M424.1 for additional explosion-proof construction and performance requirements for diesel-powered machines for use in gassy underground coal mines.

1.2 Exclusions Machine design and performance requirements are not included in the Scope of this Standard. Braking system performance requirements and proof tests are not included in the Scope of this Standard.

Notes: 1) See CSA M424.0 and CSA M424.4 for general underground mining vehicle performance requirements. 2) See CSA M424.3 for brake construction, stopping performance, and test requirements.

1.3 Terminology 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.