Table of contents
Task B-6 Diagnoses suspension systems
Task Descriptor
Transport trailer technicians inspect and diagnose suspension systems according to manufacturers’ specifications.
B-6.01 Diagnoses air suspension systems
B-6.01 Diagnoses air suspension systems
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.01.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-6.01.02P |
test operation of valves |
operation of valves are tested by supplying air at system operating pressure according to manufacturers’ specifications and procedures |
| B-6.01.03P |
inspect operation of components |
operation of components is inspected |
| B-6.01.04P |
identify problems of air supply and flow |
problems of air supply and flow are identified |
| B-6.01.05P |
verify air pressure |
air pressure is verified by using gauges |
| B-6.01.06P |
perform sensory inspections on components to identify faults |
sensory inspections are performed on components to identify faults |
| B-6.01.07P |
check for excessive movements of components |
components are checked for excessive movements according to manufacturers’ specifications and procedures |
| B-6.01.08P |
interpret test results |
test results are interpreted to determine next steps |
Range of variables
- tools and equipment include: pressure gauges, adapter fittings, hand tools, power tools, dial indicators, pry bars, jacks, jack/support stands, wheel chocks, light sources, torque wrenches, tape measures
- components include: air valves, air springs, height control valves, fittings, air lines
- problems include: faulty pressure protection valves; faulty emergency valves; cut, kinked or leaking supply lines
- sensory inspections include: listening, looking and testing for air leaks; recognizing wear, damages and defects of components
- faults include: leaks, cracks, tears, wear, kinks
- components (checked for excessive movements) include: pivot bushings, shock absorbers, airbag mounts
- next steps include: repairs, component replacement or adjustment, further diagnosis
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.01.01L |
demonstrate knowledge of air suspension systems, their components, characteristics, applications and operation |
identify air suspension systems and their components, and describe their characteristics, applications and operation |
| explain air supply and operating pressures |
| B-6.01.02L |
demonstrate knowledge of procedures to diagnose air suspension systems and their components |
identify tools and equipment used to diagnose air suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to diagnose air suspension systems and their components |
| identify hazards and describe safe work practices while diagnosing air suspension systems and their components |
| identify inspections performed to diagnose air suspension systems components |
| identify possible faults and problems found while performing inspections |
Range of variables
- components include: air valves, air springs, height control valves, fittings, air lines
- components (checked for excessive movements) include: pivot bushings, shock absorbers, airbag mounts
- tools and equipment include: pressure gauges, adapter fittings, hand tools, power tools, dial indicators, pry bars, jacks, jack/support stands, wheel chocks, light sources, torque wrenches, tape measures
- hazards include: airbag rupture, frame shift, debris (rocks, mud, grass, chunks of rubber) projection relating to air loss
- faults include: leaks, cracks, tears, wear, kinks
- problems include: faulty pressure protection valves; faulty emergency valves; cut, kinked or leaking supply lines
B-6.02 Diagnoses spring suspension systems
B-6.02 Diagnoses spring suspension systems
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yes |
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yes |
yes |
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.02.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-6.02.02P |
perform visual inspections on components |
visual inspections on components are performed to identify faults |
| B-6.02.03P |
inspect U-bolts |
U-bolts are inspected for defects or looseness visually or by using hammers |
| B-6.02.04P |
inspect for excessive movements of components |
components are inspected for excessive movements |
| B-6.02.05P |
interpret diagnostic results |
diagnostic results are interpreted to determine next steps |
Range of variables
- tools and equipment include: pneumatic tools, torque multipliers, torque wrenches, hand tools, power tools, pry bars, jacks, jack/support stands, wheel chocks, oxyacetylene torch, light sources
- components include: leaves, spring saddles, bushings, U-bolts, shock absorbers, equalizers, hangers, radius rods, torque rods, centre bolts
- faults include: worn, damaged, defective
- next steps include: repairs, component replacement or adjustment, further diagnosis
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.02.01L |
demonstrate knowledge of spring suspension systems, their components, characteristics, applications and operation |
identify spring suspension systems and their components, and describe their characteristics, applications and operation |
| B-6.02.02L |
demonstrate knowledge of procedures to diagnose spring suspension systems and their components |
identify tools and equipment used to diagnose spring suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to diagnose spring suspension systems and their components |
| identify hazards and describe safe work practices while diagnosing spring suspension systems and their components |
| identify inspections performed to diagnose spring suspension system components |
| identify possible faults found while performing inspections |
| B-6.02.03L |
demonstrate knowledge of training requirements to use oxyacetylene equipment |
identify training requirements to use oxyacetylene equipment |
Range of variables
- components include: leaves, spring saddles, bushings, U-bolts, shock absorbers, equalizers, hangers, radius rods, torque rods, centre bolts
- tools and equipment include: pneumatic tools, torque multipliers, torque wrenches, hand tools, power tools, pry bars, jacks, jack/support stands, wheel chocks, oxyacetylene torch, light sources
- hazards include: sprung or loaded suspension, falling debris, oxyacetylene flame, heavy lifting
- faults include: worn, damaged, defective
B-6.03 Diagnoses rubber suspension systems
B-6.03 Diagnoses rubber suspension systems
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yes |
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yes |
yes |
ND |
yes |
yes |
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-6.03.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-6.03.02P |
perform visual inspections on components |
visual inspections on components are performed to identify faults |
| B-6.03.03P |
interpret diagnostic results |
diagnostic results are interpreted to determine next steps |
Range of variables
- tools and equipment include: pneumatic tools, torque multipliers, torque wrenches, hand tools, power tools, pry bars, jacks, jack/support stands, wheel chocks, oxyacetylene torch, light sources
- components include: radius rods, wishbones, trunnion bushings, load cushion, torque rods, shock absorbers
- faults include: worn, damaged, defective
- next steps include: repairs, component replacement or adjustment, further diagnosis
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-6.03.01L |
demonstrate knowledge of rubber suspension systems, their components, characteristics, applications and operation |
identify rubber suspension systems and their components, and describe their characteristics, applications and operation |
| B-6.03.02L |
demonstrate knowledge of procedures to diagnose rubber suspension systems and their components |
identify tools and equipment used to diagnose rubber suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to diagnose rubber suspension systems and their components |
| identify hazards and describe safe work practices while diagnosing rubber suspension systems and their components |
| identify inspections performed to diagnose spring suspension system components |
| identify possible faults found while performing inspections |
| B-6.03.03L |
demonstrate knowledge of training requirements to use oxyacetylene equipment |
identify training requirements to use oxyacetylene equipment |
Range of variables
- components include: radius rods, wishbones, trunnion bushings, load cushion, torque rods, shock absorbers
- tools and equipment include: pneumatic tools, torque multipliers, torque wrenches, hand tools, power tools, pry bars, jacks, jack/support stands, wheel chocks, oxyacetylene torch, light sources
- hazards include: loaded suspension, falling debris, oxyacetylene flame, heavy lifting
- faults include: worn, damaged, defective
Task B-7 Services suspension systems
Task Descriptor
Transport trailer technicians maintain suspension systems to prevent system failure. They also repair or replace suspension systems on the road and in the shop to enable the trailer to operate.
B-7.01 Maintains suspension systems
B-7.01 Maintains suspension systems
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yes |
yes |
ND |
yes |
yes |
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-7.01.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-7.01.02P |
perform preventative maintenance checks |
preventative maintenance checks are performed according to company policies and procedures, and manufacturers’ maintenance procedures and schedules |
| B-7.01.03P |
measure alignment |
alignment is measured by using tools and equipment |
| B-7.01.04P |
adjust alignment of axles |
alignment of axles is adjusted according to manufacturers’ specifications |
| B-7.01.05P |
adjust ride height |
ride height is adjusted according to manufacturers’ specifications |
Range of variables
- tools and equipment include: lasers, pogo sticks, tape measures, alignment bars, alignment machines, plumb bobs
- preventative maintenance checks include: checking height control valve operation, checking air lines securement, checking U-bolts, checking bushing wear and excessive movement, checking for broken or damaged components
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-7.01.01L |
demonstrate knowledge of suspension systems, their components, characteristics, applications and operation |
identify types of suspension systems and their components, and describe their characteristics, applications and operation |
| B-7.01.02L |
demonstrate knowledge of procedures to maintain suspension systems and their components |
identify tools and equipment used to maintain suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to maintain suspension systems and their components |
| identify hazards and safe work practices while maintaining suspension systems and their components |
Range of variables
- types of suspension systems include: air, spring, rubber
- tools and equipment include: lasers, pogo sticks, tape measures, alignment bars, alignment machines, plumb bobs
- hazards include: airbag rupture, frame shift, debris (rocks, mud, grass, chunks of rubber) projection relating to air loss, loaded suspension, oxyacetylene flame, heavy lifting
B-7.02 Repairs air suspension systems
B-7.02 Repairs air suspension systems
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ND |
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-7.02.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-7.02.02P |
stabilize vehicle |
vehicle is stabilized by using methods to prevent collapse or movement |
| B-7.02.03P |
remove components |
components are removed according to manufacturers’ specifications |
| B-7.02.04P |
repair components |
components are repaired according to manufacturers’ specifications |
| B-7.02.05P |
reinstall or replace components |
components are reinstalled or replaced according to manufacturers’ specifications |
| B-7.02.06P |
adjust suspension beams for alignment of axles |
suspension beams are adjusted according to manufacturers’ specifications for alignment of axles |
| B-7.02.07P |
torque fasteners and complete repair |
fasteners are torqued according to manufacturers’ specifications and repair is completed by verifying assembly of components |
| B-7.02.08P |
verify suspension system function |
suspension system function is verified according to manufacturers’ specifications |
Range of variables
- tools and equipment include: welders, oxyacetylene torch, hand tools, pneumatic tools, jacks, jack/support stands, wheel chocks
- methods include: decompressing air systems; using wheel chocks, jacks and jack/support stands
- components include: air valves, air springs, height control valves, fittings, air lines, pivot bushings, shock absorbers, airbag mounts
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-7.02.01L |
demonstrate knowledge of air suspension systems, their components, characteristics, applications and operation |
identify air suspension systems and their components, and describe their characteristics, applications and operation |
| B-7.02.02L |
demonstrate knowledge of procedures to repair air suspension systems and their components |
identify tools and equipment used to repair air suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to remove, repair, replace, adjust, assemble and reinstall air suspension system components |
| identify hazards and safe work practices while performing repairs |
| describe procedures to verify repair of air suspension systems and their components |
Range of variables
- components include: air valves, air springs, height control valves, fittings, air lines, pivot bushings, shock absorbers, airbag mounts
- tools and equipment include: welders, oxyacetylene torch, hand tools, pneumatic tools, jacks, jack/support stands, wheel chocks
- hazards include: airbag rupture, frame shift, debris (rocks, mud, grass, chunks of rubber) projection relating to air loss
B-7.03 Repairs spring suspension systems
B-7.03 Repairs spring suspension systems
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yes |
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NV |
yes |
yes |
ND |
yes |
yes |
NV |
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ND |
Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-7.03.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-7.03.02P |
stabilize vehicle |
vehicle is stabilized by using methods to prevent collapse or movement |
| B-7.03.03P |
remove components |
components are removed according to manufacturers’ procedures |
| B-7.03.04P |
repair components |
components are repaired according to manufacturers’ specifications |
| B-7.03.05P |
reinstall or replace components |
components are reinstalled or replaced according to manufacturers’ specifications |
| B-7.03.06P |
adjust components for alignment |
components are adjusted for alignment according to manufacturers’ specifications |
| B-7.03.07P |
torque fasteners and complete repair |
fasteners are torqued according to manufacturers’ specifications and repair is completed by verifying assembly of components |
| B-7.03.08P |
verify suspension system function |
suspension system function is verified according to manufacturers’ specifications |
Range of variables
- tools and equipment include: hand tools, torque wrenches, oxyacetylene torch, pneumatic tools, jacks, jack/support stands, wheel chocks
- methods include: using wheel chocks, jacks and jack/support stands
- components include: leaves, spring saddles, bushings, U-bolts, shock absorbers, equalizers, hangers, radius rods, torque rods, centre bolts
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-7.03.01L |
demonstrate knowledge of spring suspension systems, their components, characteristics, applications and operation |
identify spring suspension systems and their components, and describe their characteristics, applications and operation |
| B-7.03.02L |
demonstrate knowledge of procedures to repair spring suspension systems and their components |
identify tools and equipment used to repair spring suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to remove, repair, replace, adjust, assemble and reinstall spring suspension system components |
| identify hazards and safe work practices while performing repairs |
| describe procedures to verify repair of spring suspension systems and their components |
Range of variables
- components include: leaves, spring saddles, bushings, U-bolts, shock absorbers, equalizers, hangers, radius rods, torque rods, centre bolts
- tools and equipment include: hand tools, torque wrenches, oxyacetylene torch, pneumatic tools, jacks, jack/support stands, wheel chocks
- hazards include: sprung or loaded suspension, falling debris, oxyacetylene flame, heavy lifting, sharp edges
B-7.04 Repairs rubber suspension systems
B-7.04 Repairs rubber suspension systems
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PE |
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MB |
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BC |
NT |
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| NV |
yes |
NV |
NV |
NV |
yes |
yes |
ND |
yes |
yes |
NV |
NV |
ND |
Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| B-7.04.01P |
select and use tools and equipment |
tools and equipment are selected and used according to task and manufacturers’ specifications |
| B-7.04.02P |
stabilize vehicle |
vehicle is stabilized by using methods to prevent collapse or movement |
| B-7.04.03P |
remove components |
components are removed according to manufacturers’ procedures |
| B-7.04.04P |
repair components |
components are repaired according to manufacturers’ specifications |
| B-7.04.05P |
reinstall or replace components |
components are reinstalled or replaced according to manufacturers’ specifications |
| B-7.04.06P |
adjust components for alignment |
components are adjusted for alignment according to manufacturers’ specifications |
| B-7.04.07P |
torque fasteners and complete repair |
fasteners are torqued according to manufacturers’ specifications and repair is completed by verifying assembly of components |
| B-7.04.08P |
verify suspension system function |
suspension system function is verified according to manufacturers’ specifications |
Range of variables
- tools and equipment include: hand tools, torque wrenches, oxyacetylene torch, pneumatic tools, jacks, jack/support stands, wheel chocks
- methods include: using wheel chocks, jacks and jack/support stands
- components include: radius rods, wishbones, trunnion bushings, load cushion, torque rods, shock absorbers
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| B-7.04.01L |
demonstrate knowledge of rubber suspension systems, their components, characteristics, applications and operation |
identify rubber suspension systems and their components, and describe their characteristics, applications and operation |
| B-7.04.02L |
demonstrate knowledge of procedures to repair rubber suspension systems and their components |
identify tools and equipment used to repair rubber suspension systems and their components, and describe their applications and procedures for use |
| describe procedures to remove, repair, replace, adjust, assemble and reinstall rubber suspension system components |
| identify hazards and safe work practices while performing repairs |
| describe procedures to verify repair of rubber suspension systems and their components |
Range of variables
- components include: radius rods, wishbones, trunnion bushings, load cushion, torque rods, shock absorbers
- tools and equipment include: hand tools, torque wrenches, oxyacetylene torch, pneumatic tools, jacks, jack/support stands, wheel chocks
- hazards include: loaded suspension, falling debris, oxyacetylene flame, heavy lifting