Section 26 D Diesel Pre-Trade Training

Grouping: Individual Diesel Course

Career path: On successful completion of the trade test, the candidate will receive a national trade test certificate and is regarded as a qualified artisan.

Overview: The Section 26D trade test (named after the relevant section in the Manpower Training Act) is a way of recognising the prior learning and experience of a person who has been working for some years in a particular trade but has not passed a trade test and is therefore not recognised as a qualified artisan. After the applicant’s suitability for a trade test is determined, the applicant will then undergo a trade test.

Pre-Requisites: A minimum of 3 years proven work experience with an N2 in the relevant Trade Theory subjects/ 4 years proven work experience with a Grade 9. Certain companies prefer its potential candidates to have a Pre-Trade Assessment as required by merSETA.
Duration: 17 days

Training Week 1	Training Week 2	Training Week 3	Trade Test week
5 Days (Pre-requisite : Pre- Trade Assessment 2 hours)	5 Days	5 Days	2 Days – (Will include an online knowledge assessment)

Topics Covered
AIR-BRAKES:
Air-brake system operation and safety function.
Complete system Pre-checks and fault identification.
Brake circuit identification.
Understanding the valves and their functions.
Testing, setting and understanding the brake force regulator/ load sensing valve.
Testing, identifying and repairing leaks/ faults.
Testing the multi circuit safety valve.
Identifying and understanding the valve port codes.
Assembly and adjustment of the drum and lining assembly.
INJECTOR
Injector removal and pre-check procedure.
Understand and conduct the braking pressure test.
Understand and conduct the spray pattern test.
Understanding and conduct the dribbling test.
Understand and conduct the leak back test.
Injector stripping procedure and precautions.
Complete component list and condition report.
Understand how and why we use an injector cleaning kit.
Complete injector component listing and functions.
Understanding injector identification, operation and principles.
Assembly specifications and adjustment of the injector.
Injector fault diagnosis.

BATTERY:
Personal and environmental Safety Precautions.
Visual inspection and report.
Battery Preparation.
Hydrometer Description.
Hydrometer specific gravity test procedure and summary.
Charging procedure understanding.
Sulphation test procedure.
Fast charge procedure.
Slow charge procedure.
High discharge procedure.
Cable resistance test procedure and diagnosis.
Starter current draw test procedure and diagnosis.
Alternator maximum output amperage test procedure and diagnosis.
Voltage drop across the starter solenoid test procedure and diagnosis.
Alternator charging voltage test procedure and diagnosis.

DIFFERENTIAL:
Complete system pre-checks and measurements.
Measuring and understanding preload.
Measuring and understanding back-lash.
Measuring and understanding crown wheel and carrier run-out.
Crown wheel and carrier assembly component listing and condition report.
Pinion shaft and differential housing component listing and condition report.
Differential system operation and function.
Assembly specifications and procedures.
Tooth contact pattern testing and remedy.

ENGINE FITTING/OVERHAUL:
Engine removal, disassemble and reassembly procedure.
Engine component part listing and functions.
Dial gauge description and understanding.
Dial gauge measuring and maintenance.
Feeler gauge description and understanding.
Feeler gauge measuring and maintenance.
Micrometer description and understanding.
Micrometer measuring and maintenance.
Crankshaft removal and assembly procedure.
Measuring and understanding crankshaft end float.
Measuring and understanding taper and ovality wear on the crankshaft.
Measuring and understanding the crankshaft fillet radius.
Cylinder head removal and assembly procedure.
Cylinder head war-page measuring and understanding.
Cylinder head depth/height measuring and understanding.
Measuring and understanding taper and ovality wear on the cylinder bore.
Piston disassembly and assembly procedure.
Measuring and understanding piston size and wear.
Measuring and understanding piston ring gap.
Measuring and understanding piston ring groove clearance wear.
Measuring and understanding piston to bore clearance.
Measuring and understanding piston height.
Oil pump function and understanding.
Measuring and understanding bearing oil clearance.
Oil pump wear measurements.
Measuring and understanding bearing draw/crush.

TRANSMISSION/GEARBOX:
Complete system pre-checks and disassembly measurements.
Complete gearbox component listing and condition report.
Clutch system function and operation.
Gearbox function and operation.
Gear selector mechanism operation and understanding.
Synchromesh unit operation and understanding.
Gear power-flow.
Measuring and understanding synchro ring wear.
Measuring and understanding gear oil clearance.
Measuring and understanding output shaft run-out.
Measuring and understanding sleeve to selector fork clearance.
Measuring and understanding wear on shims.
Measuring and understanding cluster shaft preload.
Understanding shim size selection.
Understanding gearbox assembly procedures.
Calculating and understanding gear ratios.
Fault diagnosis and understanding.

CYLINDER-HEAD REMOVAL & OVERHAUL:
Cylinder head removal procedure.
Cylinder head stripping procedure.
Complete cylinder head component listing and condition report.
Cylinder head component identification and functions.
Understand and measure cylinder head height.
Understand and measure cylinder head warpage.
Understand and measure exhaust and intake valves stem and head diameter.
Understand and measure valve seat contact width.
Understand and measure the valve seat angle.
Measure and understand valve spring length and load.
Measure and understand intake cam lift.
Measure and understand exhaust cam lift.
Measure and understand camshaft end float.
Understand and conduct a leakage test.
Understand and apply cylinder head assembly procedures.
Understand and apply torque sequences.
Correctly adjust valve timing and clearance.

ENGINE TROUBLESHOOTING:
Visual inspection and analysis.
Understanding and correct diagnosis of faults.
Air filter, intake and breathing understanding and diagnosis.
Understanding, testing and diagnosis of the starting system.
Understanding, diagnosing and adjusting valve clearance and timing.
Understanding, testing and diagnosis of cylinder compression.
Understanding, testing and diagnosis of the injector fuel pump.
Understanding, testing and diagnosis of the fuel injectors.
Understanding, testing and diagnosis of fuel system.
Understanding, testing and diagnosis of the ignition system and glow plugs.
Cooling system testing and diagnosis.
Understanding, testing and diagnosis of the viscous fan.
Correct diagnosis and repair of faults.

WHEEL ALIGNMENT:
Wheel alignment principles and summary.
Wheel alignment pre-checks.
Suspension system component identification and understanding.
Suspension system wear checks.
Steering system wear checks.
Inspection and diagnosis of tread wear pattern.
Measuring and understanding tyre and rim runout.
Tyre & rim fault diagnosis and understanding.
Understanding wheel and tyre balancing.
Measuring, understanding and adjusting camber.
Measuring, understanding and adjusting toe.
Measuring, understanding and adjusting toe out on turns.
Measuring, understanding and adjusting castor.
Measuring, understanding and adjusting steering axis/king pin inclination.
Measuring, understanding and adjusting the included angle.
Understanding thrust angles and centre lines.

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