Maintain traction and rolling stock water supply and effluent waste systems and equipment
Overview
This standard identifies the competencies you need to carry out corrective maintenance activities on traction and rolling stock water supply and effluent waste systems and equipment, in accordance with approved procedures. You will be required to maintain supply systems such as potable/wastewater and effluent waste systems. This will involve dismantling, removing and replacing faulty or damaged components such as pumps, sterilisers, valves, couplings, traps, motors, pipework, cylinders, tanks, heaters, filters, gaskets/seals, faucets and other ancillary equipment. The term traction and rolling stock used in this standard applies to passenger, freight and on-track machines (OTM). Where it is relevant these standards also apply to traction and rolling stock that has been fitted with the European Train Control System (ETCS).
You will be expected to apply a range of dismantling and assembly methods and techniques, such as marking/labelling of components to aid the reassembly, dismantling components requiring pressure techniques, torque loading and setting, and aligning and adjusting components
You must ensure that all tools, equipment and materials used in the maintenance activities are removed from the work area on completion of the activities and that all necessary maintenance documentation is completed accurately and legibly.
Your underpinning knowledge will provide a good understanding of your work and will provide an informed approach to applying maintenance procedures on traction and rolling stock water supply and effluent waste system equipment. You will understand the dismantling and reassembly methods and procedures, and their application. You will know how the equipment functions, the purpose of the individual components and associated defects, in adequate depth to provide a sound basis for carrying out the maintenance activities, correcting faults and ensuring that the repaired equipment functions to the required specification and remains compliant with all standards and regulations. You will also have sufficient knowledge of these components to ensure that they are fit for purpose and meet the specifications, thus providing a sound basis for carrying out reassembly.
You will be required to demonstrate safe working practices throughout and will understand your responsibility for taking the necessary safeguards to protect yourself and others in the workplace.
Performance criteria
You must be able to:
P1 maintain safe working practices and comply with all relevant health and safety regulations, directives, and guidelines
P2 follow the relevant system maintenance schedules to carry out the required work
P3 carry out the system maintenance activities within the limits of your personal authority
P4 carry out the system maintenance activities in the specified sequence and in an agreed timescale
P5 report any instances where the maintenance activities cannot be met or where there are identified defects outside the planned schedule
P6 complete relevant system maintenance records and pass them on to the appropriate person
P7 dispose of waste materials in accordance with safe working practices and approved procedures
Knowledge and Understanding
You need to know and understand:
K1 the relevant health and safety regulations, directives, guidelines, and safe working practices and procedures defined by your organisation, as appropriate to the activity and your working area
K2 the isolation and lock-off procedures or permit-to-work procedure that applies to the system being worked on (such as electrical isolation, locking off switchgear, placing of maintenance warning notices, proving the isolation has been achieved and secured)
K3 the specific health and safety precautions to be applied during the maintenance procedure, and their effects on others (to include the prevention of water cross contamination, The Prevention and Control of Legionellosis, and Safe working in Confined Spaces)
K4 the hazards associated with carrying out maintenance on effluent waste water systems, and how to minimise them to reduce the risks
K5 the classification of different voltage levels and the authority requirements for working on them
K6 what constitutes a hazardous voltage/current and how to recognise victims of electric shock
K7 how to reduce the risks of an electric shock (such as insulated tools, rubber matting and isolating transformers)
K8 the importance of wearing protective clothing and other appropriate safety equipment (PPE) during the maintenance process
K9 how to obtain and interpret drawings, specifications, manufacturers' manuals and other documents needed in the maintenance process
K10 the procedure for obtaining replacement parts, materials and other consumables necessary for the maintenance activities
K11 company policy on repair/replacement of components during the maintenance process
K12 the sequence to be adopted for the dismantling/re-assembly of various types of assemblies
K13 the methods and techniques used to dismantle/assemble mechanical equipment (such as release of pressures/force, component identification, extraction, pressing, alignment)
K14 methods of checking that components are fit for purpose, how to identify defects and wear characteristics, and the need to replace 'lifed' items (such as filters, seals, washers and gaskets)
K15 the importance of recording the serial numbers of removed and newly fitted components affecting the rolling stock asset tree
K16 how to make adjustments to components/assemblies
K17 the principles of how the equipment functions, its operation sequence, the working purpose of individual units/components and how they interact (such as sterilisers)
K18 the applications of the different types of pipework system (such as flexible, copper, plastic, steel)
K19 the applications of the different types of coupling and their fittings (such as bends, branches, reduction pieces)
K20 the different methods used to treat water supplies to meet user needs
K21 the applications of the different pipework and equipment cleaning procedures (such as rod, water jet, solvents)
K22 how to check that tools and equipment are free from damage or defects, and are in a safe and usable condition
K23 the generation of maintenance documentation and/or reports following the maintenance activity
K24 the equipment operating and control procedures to be applied during the maintenance activity
K25 how to use lifting and handling equipment in the maintenance activity, following safe working practices
K26 the problems associated with the maintenance activity, and how they can be overcome
K27 the organisational procedure to be adopted for the safe disposal of waste of all types of materials
K28 the extent of your own authority and to whom you should report if you have problems that you cannot resolve
Scope/range
Scope Performance
During the system maintenance activities, individuals will:
- plan and communicate the maintenance activities to cause minimal disruption to normal working
- obtain and use the correct issue of company and/or manufacturers' drawings and maintenance documentation as well as the correct version of any maintenance software tools required
- adhere to procedures or systems in place for risk assessment, control of substances, personal protective equipment and other relevant safety regulations and procedures to realise a safe system of work
- ensure the safe isolation of equipment (such as mechanical, electricity, or fluids)
- provide and maintain safe access and working arrangements for the maintenance area
- carry out the maintenance activities using appropriate techniques and procedures
- re-connect and return the system to service on completion of the maintenance activities
- dispose of waste items to comply with environmental protection guidelines and ensure the work area remains safe
Types of water systems, on which maintenance activities may be carried out, include:
- potable
- toilet
- effluent
Types of maintenance techniques carried out, as appropriate to the equipment being maintained, include:
- dismantling equipment to unit/sub-assembly level
- dismantling units to component level (as applicable)
- setting, aligning and adjusting replaced components
- checking components for serviceability
- marking/labelling of components
- replacing all `lifed' items (such as filters, seals, gaskets)
- replacing damaged/defective components
- leak checks
- making checks before re-connecting system
- tightening fastenings to the required torque
- functionally testing completed system
Types of water supply and waste equipment/components maintained and/or replaced could include:
- pumps
- interceptors
- controlled emissions tanks (CET)
- supply tanks
- waste water tanks
- gaskets/seals
- motors
- plastic pipe
- manifolds
- faucets
- valves/mixers
- copper pipe
- traps
- control devices
- couplings/connectors
- steel pipe
- filters
- electrical wiring
- heaters
- pump chambers
- flexible pipe
- sensors
- sterilisers
- electrical connectors
- macerators
- gauges/indicators
- switches
- ancillary equipment (such as sinks, toilets, showers)
- other specific water component
Waste water distribution systems maintenance may need to be completed in accordance with the following:
- organisational guidelines and codes of practice
- equipment manufacturer's operation range
- BS, ISO and/or BS EN standards
- company standard operating procedures (SOP's)
- documents such as technical procedures, vehicle maintenance instructions, vehicle overhaul instructions, workshop overhaul standards specifications
Types of paperwork/records that need to be completed and passed to the appropriate people could include:
- job cards
- permits to work/formal risk assessment and/or sign on/off procedures
- maintenance log or report
- company-specific documentation
- electronic records