Remove and replace heavy vehicle trailer chassis units and components
Overview
This standard is about removing and replacing units and components commercial trailer units and components where dismantling and re-assembly of chassis systems is required. It is also about evaluating the performance of replaced units and components.
The units and components concerned are those not replaced as part of normal routine heavy vehicle trailer maintenance (servicing) activities.
Performance criteria
You must be able to:
P1 use suitable personal and vehicle protective equipment and use vehicle coverings throughout all removal and replacement activities
P2 support your removal and replacement activities by reviewing
P2.1 heavy vehicle trailer technical data
P2.2 removal and replacement procedures
P2.3 legal requirements
P3 prepare, check and use all the equipment required following manufacturers' instructions
P4 carry out all removal and replacement activities following;
P4.1 manufacturers' instructions
P4.2 your workplace procedures
P4.3 health, safety and environmental requirements
P5 work in a way which minimises the risk of:
P5.1 damage to other heavy vehicle trailer systems, units and components
P5.2 damage to your working environment
P5.3 contact with leakage and hazardous substances
P5.4 injury to self and others
P6 ensure replaced chassis units and components conform to the heavy vehicle heavy vehicle trailer operating specification and any legal requirements
P7 promptly record and report any additional faults you notice during the course of your work
P8 use suitable testing methods to evaluate the performance of the reassembled system accurately
P9 ensure the reassembled chassis system performs to the heavy vehicle trailer operating specification and meets any legal requirements prior to return to the customer
P10 ensure your records are accurate, complete and promptly passed to the relevant person(s) in the format required
P11 complete all removal and replacement activities within the agreed timescale
P12 promptly report any expected delays in completion to the relevant person(s)
Knowledge and Understanding
You need to know and understand:
Legislative and organisational requirements and procedures
K1 the legal requirements relating to the heavy vehicle trailer (including road safety requirements)
K2 the implications on an Operator’s Licence of not carrying our repairs and inspections correctly
K3 the legislation and workplace procedures relevant to:
K3.1 health and safety
K3.2 the environment (including waste disposal)
K3.3 appropriate personal and vehicle protective equipment
K4 your workplace procedures for
K4.1 recording removal and replacement information
K4.2 the referral of problems
K4.3 reporting delays to the completion of work
K5 the importance of documenting removal and replacement information
K6 the importance of working to agreed timescales and keeping others informed of progress
K7 the relationship between time and costs
K8 the importance of promptly reporting anticipated delays to the relevant person(s)
Use of technical information
K9 how to find, interpret and use sources of information applicable to unit and component removal and replacement within chassis systems
K10 the importance of using the correct sources of technical information
K11 the purpose of and how to use identification codes
Electrical and electronic principles
K12 vehicle earthing principles and earthing methods
K13 electrical and electronic principles associated with chassis systems, including types of sensors and actuators, their application and operation
K14 types of circuit protection and why these are necessary
K15 electrical safety procedures
K16 electric symbols, units and terms
K17 electrical and electronic control system principles
Chassis system operation and construction
K18 how heavy vehicle trailer chassis systems and their related units and components are constructed, removed and replaced
K19 how heavy vehicle trailer chassis systems and their related units and components operate
Equipment
K20 how to prepare, check and use all the removal and replacement equipment required
Chassis system unit and component removal and replacement
K21 how to remove and replace heavy vehicle trailer chassis system mechanical, electrical, hydraulic and pneumatic units and components
K22 how to select and use gaskets, sealants, seals, fittings and fasteners
K23 how to test and evaluate the performance of replacement chassis system units and components and the reassembled system against the heavy vehicle trailer operating specifications and any legal requirements
K24 the relationship between testing methods and the chassis system units and components replaced – the use of appropriate test methods
K25 when replacement units and components must meet the original equipment specification (OES) for warranty or other requirements
K26 how to work safely avoiding damage to other heavy vehicle trailer systems, components and units and contact with leakage and hazardous substances
K27 awareness of health and safety aspects of working on loaded heavy vehicle trailers (e.g. HAZCHEM, load type and capacity)
K28 knowledge of vehicle to heavy vehicle trailer brake `threshold' pressures/delays
Scope/range
- Equipment is:
- hand tools
- special workshop tools
- general workshop equipment
- electrical testing equipment
- Testing methods are:
- sensory
- functional
- Units and components are:
- mechanical
- electrical
- hydraulic and fluid
- pneumatic
- Chassis systems are:
- steering
- suspension, including ESP
- braking, including ABS and EBS
- wheels (locking and security) and tyres
Scope Performance
Scope Knowledge
Values
Behaviours
Skills
Glossary
This section contains examples and explanations of some of the terms used but does not form part of the standard.
Agreed timescales
Examples include: manufacturer's recommended work time, job times set by your company or a job time agreed with a specific customer
Functional testing
Examples include: use of brake roller tester, dynamometer, suspension activation
Heavy Vehicle Trailer
These include: DVSA category O3: Trailers over 3,500 kg but not exceeding 10,000kg. DVSA category O4: Trailers with a DTAW exceeding 10,000kg.