24299 version 1
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Demonstrate knowledge of engine crankshaft and camshaft machining
procedures
Level
4
Credits
4
Purpose
This theory-based unit standard is for people in the automotive machining
industry. People credited with this unit standard are able to demonstrate
knowledge of engine crankshaft and camshaft machining procedures.
Subfield
Motor Industry
Domain
Engines
Status
Registered
Status date
25 January 2008
Date version published
25 January 2008
Planned review date
31 December 2012
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
Definitions
Company requirements refer to instructions to staff on policy and procedures which are
documented in memo or manual format and are available in the workplace. These
requirements include but are not limited to – company specifications and procedures, work
instructions, manufacturer specifications, product quality specifications, and legislative
requirements.
Machine instructions refer to specifications and instructions provided by the machine
manufacturer for the set-up and correct operation of that machine.
Welding manufacturer instructions refer to specifications and/or instructions provided by
the welding equipment manufacturer for the correct operation of the welding equipment
provided by that manufacturer.
 New Zealand Qualifications Authority 2016
24299 version 1
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Elements and performance criteria
Element 1
Demonstrate knowledge of engine crankshaft machining procedures.
Performance criteria
1.1
Measuring equipment for assessing the crankshaft condition is described in
accordance with service information.
1.2
The importance of cleanliness when carrying out an inspection of the crankshaft
is explained in accordance with company requirements.
1.3
Crankshaft inspection procedures are described in accordance with company
requirements.
Range
1.4
visual inspection, precision measuring, crack test, hardness test.
Crankshaft straightening procedures to enable the machining to meet engine
manufacturer specifications are described in accordance with company
requirements.
Range
determining type and position of the bend, determining original
method of heat treatment of the shaft, pre-heating, supporting the
shaft and pressing, overcoming springback, relieving stresses.
1.5
The procedure to set up and prepare the crankshaft for grinding is described in
accordance with grinding machine instructions.
1.6
Crankshaft regrinding operation is described in accordance with grinding
machine instructions.
Range
1.7
The shaft pre-heating operation is described in accordance with company
requirements.
Range
1.8
stress relieving by heating, pre-grinding and post-grinding,
ensuring fillet radii are maintained (for journals), dressing oil holes
(for journals), checking hardness, finish grinding.
suitable furnace to ensure even heating, at a temperature that will
not affect any induction hardening.
The build-up of the crankshaft journal is described in accordance with rebuilding
machine instructions.
Range
journals – metal spraying;
welding – short arc, submerged arc;
rechecking crankshaft for straightness.
 New Zealand Qualifications Authority 2016
24299 version 1
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1.9
Journal polishing techniques are described in accordance with engine
manufacturer tolerances.
Range
main journals, big end journals, thrust surfaces.
1.10
Replacement of oil plugs, and repairs to oil seal areas, snout, and keyway, are
described in accordance with engine manufacturer tolerances.
1.11
The importance of ensuring all oil passages are clear after machining is
explained in accordance with company requirements.
1.12
The importance of protecting the re-machined crankshaft against damage,
corrosion, and foreign matter is explained in accordance with company
requirements.
Element 2
Demonstrate knowledge of engine camshaft machining procedures.
Performance criteria
2.1
Measuring equipment for assessing the camshaft condition is described in
accordance with service information.
2.2
The importance of cleanliness when carrying out an inspection of the camshaft
is explained in accordance with company requirements.
2.3
Camshaft inspection procedures are described in accordance with company
requirements.
Range
2.4
visual inspection, precision measuring, straightness, crack test,
hardness test.
Camshaft straightening procedures to enable machining to meet engine
manufacturer specifications are described in accordance with company
requirements.
Range
determining type and position of the bend, determining original
method of heat treatment of the shaft, pre-heating, supporting the
shaft and pressing, overcoming springback, relieving stresses.
2.5
The procedure to set up and prepare the camshaft for machining is described in
accordance with grinding machine instructions.
2.6
The procedure to build up a camshaft lobe with hardfacing material is described
in accordance with welding manufacturer instructions.
2.7
Camshaft grinding and polishing procedures to engine manufacturer tolerances
and specifications are described in accordance with company requirements.
Range
lobe profile, bearing journals, thrusts.
 New Zealand Qualifications Authority 2016
24299 version 1
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2.8
Replacement of oil plugs, and repairs to oil seal areas, snout, and keyway, are
described in accordance with engine manufacturer tolerances.
2.9
The importance of ensuring all oil passages are clear after machining is
explained in accordance with company requirements.
2.10
The importance of protecting the re-machined camshaft against damage,
corrosion, and foreign matter is explained in accordance with company
requirements.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016