SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Repair variable displacement hydraulic pumps and motors 
SAQA US ID UNIT STANDARD TITLE
244697  Repair variable displacement hydraulic pumps and motors 
ORIGINATOR
SGB Manufacturing and Assembly Processes 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 4  NQF Level 04  12 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
The skills, values and knowledge reflected in this unit standard are required by people in the field of Fluid Power Engineering who are required to repair hydraulic pumps and motors in a workshop. The learning outcomes in this unit standard contribute to the exit level outcomes required for a NQF Level 4 Qualification.

Persons credited with this unit standard are able to:
  • Demonstrate understanding of variable displacement pumps and motors.
  • Prepare to strip the hydraulic variable displacement pump and motor.
  • Strip the hydraulic variable displacement pump and motor.
  • Inspect the hydraulic variable displacement pump and motor components.
  • Prepare the components for assembly.
  • Assemble the hydraulic variable displacement pump and motor.
  • Test the variable displacement pump and motor. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that a person is already competent in terms of the following outcomes when starting to learn toward this unit standard:
  • Select, use and care for engineering measuring equipment at NQF Level 2.
  • Select, use and care for engineering hand tools at NQF Level 2.
  • Select fluid power seals at NQF Level 3.
  • Install, test and maintain basic hydraulic system at NQF Level 3.
  • Use and maintain fluid power instrumentation at NQF Level 3. 

  • UNIT STANDARD RANGE 
    The following scope and context applies to the whole unit standard:
  • Repair of hydraulic variable displacement pumps and motors is limited to a workshop environment. 

  • Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate understanding of variable displacement pumps and motors. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The differences between a variable and fixed displacement hydraulic pump and motor are explained in relation to their function and construction. 

    ASSESSMENT CRITERION 2 
    The application of the variable hydraulic pumps and motors in a hydraulic system are described in relation to the benefit achieved. 

    ASSESSMENT CRITERION 3 
    The principle of operation of the controllers is explained in relation to their application for different pumps and motors. 

    ASSESSMENT CRITERION 4 
    The effect of contamination, oil cleanliness and cavitation on pumps and motors and their controllers is explained in relation to the usable lifespan of equipment. 

    ASSESSMENT CRITERION 5 
    The differences between open, semi-closed and closed loop systems are explained in terms of their operation. 

    ASSESSMENT CRITERION 6 
    Volumetric and mechanical efficiency are explained in terms of their effect on the system performance. 

    SPECIFIC OUTCOME 2 
    Prepare to strip the variable hydraulic pump or motor. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The hydraulic pump or motor to be repaired is identified from relevant paperwork and markings. 

    ASSESSMENT CRITERION 2 
    The pump or motor layout and settings are recorded in accordance with workplace requirements. 
    ASSESSMENT CRITERION RANGE 
  • Mounting orientation, other attachments, specific settings.
  • Details include temperature, fluid compatibility.
     

  • ASSESSMENT CRITERION 3 
    The order to proceed with work is confirmed in accordance with workplace procedures. 

    ASSESSMENT CRITERION 4 
    The exterior is cleaned without damaging the pump or motor. 

    ASSESSMENT CRITERION 5 
    Hydraulic fluid in the component is removed in accordance with safety, health and environmental requirements. 

    ASSESSMENT CRITERION 6 
    A fluid sample or other evidence that could lead to the possible cause of failure is retained and recorded in accordance with company requirements. 

    ASSESSMENT CRITERION 7 
    The pump or motor is handled in accordance with safe operating practices for lifting equipment and tools. 

    ASSESSMENT CRITERION 8 
    Tools and equipment required are identified and prepared in accordance with workplace requirements. 

    SPECIFIC OUTCOME 3 
    Strip the hydraulic pump or motor. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The hydraulic component is stripped in accordance with manufacturer's specifications. 

    ASSESSMENT CRITERION 2 
    Evidence that could lead to the possible cause of failure is retained and recorded in accordance with company requirements. 

    ASSESSMENT CRITERION 3 
    Parts and components are cleaned and stored in accordance with workplace procedures. 

    ASSESSMENT CRITERION 4 
    Tools and equipment are used in accordance with their design. 

    ASSESSMENT CRITERION 5 
    Work is conducted in accordance with company and legislative safety, health and environmental requirements. 

    SPECIFIC OUTCOME 4 
    Inspect the hydraulic pump or motor components. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The hydraulic pump or motor components are inspected for wear and tolerance in accordance with manufacture's specifications. 
    ASSESSMENT CRITERION RANGE 
    Scoring, shaft seal tolerances, rotating group and controller.
     

    ASSESSMENT CRITERION 2 
    Condition of components is reported in accordance with workplace requirements. 

    ASSESSMENT CRITERION 3 
    Decisions to repair or replace components are made in accordance with the condition of the component and manufacturer specifications. 

    ASSESSMENT CRITERION 4 
    Component configuration is determined in accordance with workplace and/or manufacturer's requirements. 

    ASSESSMENT CRITERION 5 
    The displacement of the hydraulic pump or motor is calculated in accordance with workplace requirements. 

    SPECIFIC OUTCOME 5 
    Prepare the components for assembly. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Replacement components are ordered in accordance with workplace procedures. 

    ASSESSMENT CRITERION 2 
    Seals selected are in accordance with manufacturer requirements for the operating conditions. 

    ASSESSMENT CRITERION 3 
    Fluid compatibility is explained in relation to the effect on seals and materials. 

    ASSESSMENT CRITERION 4 
    The reworked or manufactured components are evaluated and confirmed to be within acceptable tolerances. 

    ASSESSMENT CRITERION 5 
    The relevant documentation is completed in accordance with workplace requirements. 

    SPECIFIC OUTCOME 6 
    Assemble the hydraulic pump or motor. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The hydraulic pump or motor is assembled in accordance with manufacturer's specifications. 

    ASSESSMENT CRITERION 2 
    Work is conducted in accordance with workplace and legislative safety requirements. 

    ASSESSMENT CRITERION 3 
    Tools and equipment are used in accordance with their design. 

    ASSESSMENT CRITERION 4 
    The hydraulic pump or motor accessories are assembled in accordance with the recorded layout. 

    SPECIFIC OUTCOME 7 
    Test the pump or motor. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The pump or motor is prepared for testing in accordance with workplace and safety requirements. 
    ASSESSMENT CRITERION RANGE 
    This includes cleanliness, filling with oil and connecting test equipment.
     

    ASSESSMENT CRITERION 2 
    The testing is carried out according to workplace procedures. 
    ASSESSMENT CRITERION RANGE 
    Tests include functional and leakage measurements.
     

    ASSESSMENT CRITERION 3 
    Test results are compared to manufacturer's specifications. 

    ASSESSMENT CRITERION 4 
    Problems identified are reported and corrected in accordance with workplace standards. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • Volumetric and mechanical efficiency principles.
  • Evaluating measurement results meaningfully.
  • Communicating repair results.
  • Safety requirements in handling heavy equipment.
  • Environmental issues regarding disposal of components and fluids.
  • Compatibility of fluids with seals and materials.
  • Testing of variable displacement pumps and motors.
  • Understanding of closed and open loop hydraulic circuits.
  • The concepts of load sensing, flow, pressure, horse power and electronic control. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking.

    Note: The ability of the candidate to identify faults and take appropriate action. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community.

    Note: The ability of the candidate to work as a team member. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively.

    Note: The ability of the candidate to work according to agreed timeframes. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.

    Note: The ability of the candidate to make "repair or replace" decisions based on evaluation of component condition and tolerances. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and/or language skills in the modes of oral and/or written presentations.

    Note: The ability of the candidate to communicate information in a report. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others.

    Note: The ability of the candidate to use measuring instruments. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.

    Note: The ability of the candidate to integrate the various functions to ensure a successful repair. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Terminology:
  • The terminology used in this unit standard is in accordance with general engineering practices.

    Notes to Assessors:

    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
  • All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent

    The following particular issues should be taken into consideration when assessing against this unit standard:
  • All functions must be performed in reasonable timeframes. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  58880   Further Education and Training Certificate: Fluid Power  Level 4  NQF Level 04  Reregistered  2023-06-30  MERSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.