This unit of competency applies to clock repair work undertaken in clock service workshops. The unit does not cover servicing and repairs to complex clocks (e.g. clocks which are fitted with rack or count wheel striking mechanisms, complex escapements or oscillating mechanisms, rack or count wheel striking mechanisms, or clock chiming mechanisms). Where servicing or repairs are to be undertaken on these clocks or components appropriate higher level metal and engineering units should be selected.

If after service and repair the clock is to be installed at the client's premises, MEM21016A Install and set up clocks, should be selected.

Band: A

Unit weight: 6 points

ELEMENT

PERFORMANCE CRITERIA

1. Establish servicing requirements and liaise with customer

1.1. Identify clock origin and case and movement construction and function

1.2. Verify clock condition and performance concerns with customer

1.3. Prepare written and verbal quotations

1.4. Agree with customer on recommended service procedures

1.5. Prepare clock for handover

1.6. Record and document repair process

1.7. Source replacement parts from industry suppliers

2. Disassemble clock, case and movement components for servicing

2.1. Establish appropriate working environment

2.2. Remove clock movements in sequence considering case design and construction

2.3. Select and correctly use appropriate hand and bench tools

2.4. Verify condition and completeness of clock case

2.5. Perform power release safely

2.6. Dismantle clock movement in correct sequence

3. Service and repair movement, sub-assemblies and components

3.1. Inspect movement, sub-assemblies and components, and identify condition and faults

3.2. Confirm servicing and repair requirements

3.3. Replace or repair faulty or worn component parts, movement or sub-assemblies

3.4. Use hand tools and equipment correctly for servicing and repair

3.5. Clean clock components at appropriate stages using cleaning and finishing methods

3.6. Verify condition of components after cleaning

4. Service clock cases

4.1. Verify completeness of clock case

4.2. Repair and replace missing or damaged components

4.3. Clean internals and refinish/refurbish exterior with appropriate materials and techniques

5. Reassemble clock movement and case components

5.1. Reassemble clock movement and case components

5.2. Assemble motion work and verify and adjust hand setting tension

5.3. Check and adjust component operations and clock functioning

5.4. Select and apply lubricants according to component design and estimated frictional load

5.5. Apply clock assembly inspections and precautions

5.6. Install and secure movement in case

6. Bench test and adjust clock functions

6.1. Verify/confirm function of clock movement

6.2. Set up, operate mechanical clock timing machine and interpret readings correctly

6.3. Verify clock performance and rate testing

6.4. Adjust rate according to performance and design characteristics

7. Apply industry workshop standards to perform work

7.1. Use hand tools and equipment safely and correctly

7.2. Handle components without damaging or marking

7.3. Establish a clean and safe work environment

Required skills

Required skills include:

identifying country of origin

identifying various mechanical clocks by features, escapement and oscillator

dismantling and reassembling clock assemblies and movements

identifying and rectifying wear and faults in escapement, bearings, arbors, wheels and pinions

replacing or repairing broken or damaged components

safe handling of clock mainsprings, including using mainspring handling equipment

correct lubrication including amount, type, cleanliness and point of application

using service equipment (e.g. timing machine, cleaning machine, bushing tool, lathe

determining and calculating train counts, such as vibrations per hour (VPH)

Required knowledge

Required knowledge includes:

types of mechanical clocks by country of origin, function, escapement, quality

function and operating principles of mechanical clocks

dismantling and reassembling techniques of clock movements according to procedures and manufacturer guidelines

clock cleaning methods

procurement of replacement clock parts

occupational health and safety (OHS) regulations and procedures

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to service and repair clock timepieces to industry standards, manufacturer specifications and in accordance with safety regulations and procedures.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently:

dismantle and reassemble clock movement and components

safely remove and replace clock mainsprings

repair and re-finish worn arbor pivots

re-centre and replace worn bearings (re-bushing)

safely clean clock components using appropriate methods and media

apply lubrication techniques (e.g. correct type and amount)

perform function and performance testing (e.g. adjust escapements, beat error and rate).

Context of and specific resources for assessment

Assessment may occur on the job or in a simulated working environment. Access is required to real or appropriately simulated situations, including work areas, materials and equipment, and information on workplace practices and OHS practices.

Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.

Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.

Method of assessment

Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering Training Package.

Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.

Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure its correct interpretation and application.

Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.

Assessment must confirm a reasonable inference that competency is not only able to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.

Assessment may be in conjunction with assessment of other units of competency where required.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Clock origin, case and movement construction and function

Clock origin, case and movement construction and function may include:

clocks from all countries of manufacture

clocks manufactured during the 19th and 20th Centuries

clock cases made from timber, metal, natural stone and composite materials

movement components made from brass and steel

pendulum or balance oscillating systems

timepiece only mechanisms

motive force (e.g. mainspring or weight driven)

gear train for transmitting of power

escapement for release power

oscillator for controlling the speed of release of power

winding (e.g. by key)

time setting (e.g. by key or direct movement of hands)

Clock handover

Clock handover may include:

informing customer of features and characteristics of clock

demonstrating winding and setting procedures for clock

inform customer of operation and switching of any automatic night silent, or shut-off for chiming or striking mechanism

warranty information

date of installation

Record and document repair process

Record and document repair process may include:

extent and date of repair recorded

tracking of subcontractors

cost of replacement parts

time spent on procedure

Appropriate working environment

Appropriate working environment may include:

clean bench and working area

adequate lighting and ventilation

tools and equipment organised and in good condition

ergonomic seating, including bench height

Condition and faults

Condition and faults may include:

originality of components

corrosion

cleanliness

wear

damaged or failed components

Faulty or worn components

Faulty or worn components may include:

barrel and mainspring (e.g. hooking, teeth and bearings)

gear trains (e.g. bearings, pivots and pinions)

pendulum escapements (e.g. pallets and escape wheels engagement drop, locking and impulse)

oscillators pendulum type (e.g. rod, crutch engagement, suspension spring fittings and bob security)

oscillators balance type (e.g. balance spring, balance staff and roller)

winding mechanisms( e.g. key fitting, click, ratchet wheel and click spring)

setting hand tension or centre wheel friction

Hand tools and equipment

Hand tools and equipment may include:

clock repairers' hand tools (e.g. tweezers, screwdrivers and eyeglasses)

clock mainspring winder

clock re-bushing tool

reamers and smoothing broaches

lathe

oilstones and burnishers

movement supports for clock movements

oilers and oil pots

cleaning brushes, peg wood, solutions and rinses e.g. solvents

clock timing machine (this includes any type of machine that provides frequency count or indication of daily rate)

Cleaning and finishing

Cleaning and finishing may include:

hand cleaning

conventional machine (rotational)

ultrasonic

vibrational finishing and polishing

types of clock cleaning solutions

precautions for handling and disposing cleaning solutions

safe practices for the use of polishing equipment

Verify and adjust hand setting tension

Verify and adjust hand setting tension may include:

test for correct friction (e.g. power to escape wheel)

adjustment of motion work friction

Select and apply lubricants

Select and apply lubricants may include:

correct lubricants for escapements, bearings, barrels and mainsprings

techniques for lubricating

Clock assembly inspections and precautions

Clock assembly inspections and precautions may include:

gear train end shake, backlash, lubrication

mainspring engagement, hooking, tension, lubrication

escapement operation, depthing, lubrication

pendulum oscillator (e.g. amplitude, crutch engagement and suspension function)

balance oscillators (e.g. end shake and balance spring condition, correct lubrication)

Performance and design characteristics

Performance and design characteristics may include:

source of motive force

escapement type

oscillator and pendulum construction

Clean and safe work environment

Clean and safe work environment may be specified through:

relevant legislation and regulations

enterprise operating procedures

5S housekeeping related principles and procedures (e.g. sort, straighten, shine, standardise, sustain)

Unit sector

Horology

This unit contains employability skills.