Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to overhauling engines and associated engine components, including procedures for:
operating specialised engine overhaul tools, equipment and machinery
using cleaning chemicals and toxic substances
environmental requirements, including procedures for trapping, storing and disposing of lubricants and fluids released from engines
types, characteristics and operating principles of outdoor power equipment engines and associated engine components
outdoor power equipment engine overhaul procedures, including:
methods for cleaning and preparing an engine for overhaul
engine dismantling procedures
engine component inspection, measuring and evaluation procedures, including methods for measuring and calculating tolerances and clearances
engine and engine component repair and adjustment procedures, including:
engine cylinder head and cylinder block
engine crankshaft and camshaft
engine cylinder and engine sleeve fitting, boring and honing
engine bearing tunnel and connecting rod repair
engine assembly and adjustment procedures for achieving component tolerances, including:
piston to connecting rod big-end alignment
big-end bearing to crankshaft journal clearance
big-end bearing crush with bearing blue
piston ring end gap, back clearance and side clearance
main bearing to crankshaft journal clearance
cylinder head, valves, guides and seats
camshafts and cam followers
camshaft end float
crankshaft end float
gear backlash
governors
oil pump sealing and pick-up oil piping
component assembly procedures and processes, including:
welsh plugs and oil gallery plugs
piston and connecting rod assemblies
big-end bearings
piston rings to pistons
main bearings and thrust washers
crankshafts, including protection measures for crankshaft journals, bearings, rings and bores
finished camshaft bearings
cylinder head and components
camshafts and cam followers
timing gears
oil pumps, oil squirters, oil splashers, and oil pump pick-ups
governors
balance shafts
fitting ancillary components, including covers and cowlings, seals, housings, crankshaft pulleys and flywheels
post-overhaul testing procedures for engines, including:
fuel system adjustments
governor speed adjustments
engine protection devices.
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the outdoor power equipment engines that they have worked on, e.g. repair orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
automotive workplace or simulated workplace
workplace instructions
manufacturer outdoor power equipment engine specifications
two different outdoor power equipment engines requiring overhaul
tools, equipment and materials appropriate for overhauling and adjusting outdoor power equipment engines.