Carry out Routine Adjustment to Railway Traction and Rolling Stock — Open Awards Occupational Qualification Motor Vehicle & Transport Revision
This subtopic focuses on developing the practical competence to perform routine mechanical and electrical adjustments on railway traction units (e.g., loco
Topic Synopsis
This subtopic focuses on developing the practical competence to perform routine mechanical and electrical adjustments on railway traction units (e.g., locomotives, multiple units) and rolling stock (e.g., carriages, wagons) in a maintenance depot or trackside environment. It integrates hands-on skills with essential knowledge of health and safety legislation, including the Health and Safety at Work etc. Act 1974, Railway Safety Principles and Guidance, the Provision and Use of Work Equipment Regulations 1998 (PUWER), and the Lifting Operations and Lifting Equipment Regulations 1998 (LOLER). Learners must demonstrate the ability to follow safe systems of work, interpret technical documentation, select appropriate tools, and make adjustments within specified tolerances to ensure operational safety, reliability, and compliance with railway industry standards.
Key Concepts & Core Principles
- Track components: Understand the function of rails, sleepers, ballast, chairs, and fastenings, and how they work together to support train loads and maintain gauge.
- Track geometry: Know the key measurements—gauge, cross-level, twist, and alignment—and how deviations affect train safety and ride quality.
- Safe systems of work: Master the principles of the Safe System of Work (SSOW), including lookout warning, possession of the line, and site safety briefings.
- Defect identification: Recognise common track defects such as broken rails, loose fastenings, worn components, and ballast degradation, and know the correct reporting procedures.
- Maintenance techniques: Perform basic tasks like tightening fastenings, replacing worn sleepers, tamping ballast, and adjusting rail joints using appropriate hand tools and small plant.
Exam Tips & Revision Strategies
- In practical assessments, narrate every step aloud: explain what you are checking, which tool you are using, why you have chosen it, and what the specified tolerance is. This demonstrates underpinning knowledge and helps assessors award marks even if the physical adjustment is not perfectly executed.
- Before starting any hands-on task, show the assessor that you have read and understood the relevant work instruction or maintenance manual pages. Point to the key data such as torque settings or dimensional limits. This confirms your ability to source and apply technical information.
- For written or multiple-choice questions, memorise the full titles and key principles of legislation like HSWA 1974, PUWER, LOLER, and ROGS (Railways and Other Guided Transport Systems (Safety) Regulations 2006). Be able to give one example of how each applies to routine adjustments (e.g., PUWER requires work equipment to be maintained in a safe condition).
- Always double-check your measurements after making an adjustment and before signing off. Re-measure to confirm the value is within tolerance; if it is not, show the assessor that you can troubleshoot and repeat the adjustment process correctly. Accuracy is a major factor in gaining high marks.
Common Misconceptions & Mistakes to Avoid
- Forgetting to secure the rolling stock or traction unit against unintended movement (e.g., applying parking brakes, placing scotches/derails) before commencing adjustment work, which creates a serious crush or collision risk.
- Mismeasuring critical clearances by using a ruler instead of a specified feeler gauge or Go/No-Go gauge, leading to adjustments that fall outside the permitted tolerance band.
- Interchanging fasteners or reusing self-locking nuts/washers, which can compromise the integrity of the joint and cause subsequent failure in service due to loosening from vibration.
- Failing to update the maintenance records or log the adjustment results immediately, resulting in an incomplete asset history that may mislead future maintenance decisions or invalidate warranty claims.
Examiner Marking Points
- Award credit for demonstrating a methodical approach to pre-work risk assessment, including identifying hazards specific to the adjustment task (e.g., moving parts, stored energy, electrical risk) and implementing control measures in line with a safe system of work.
- Confirm that the candidate isolates all energy sources (traction current, pneumatic, hydraulic) and applies personal lock-off devices correctly before any physical intervention, in accordance with company isolation procedures and Railway Group Standards.
- Assess the candidate's ability to select, calibrate (where necessary), and correctly use the specified tools and measuring instruments (e.g., torque wrench, feeler gauge, dial indicator) to achieve adjustment accuracy as per the maintenance manual.
- Require the candidate to interpret schematic diagrams, maintenance instructions, or work cards to identify adjustment parameters (e.g., brake pad clearance, coupler height, door leaf gaps) and then verify the final settings against original specifications, recording results legibly on the appropriate documentation.