Major Work Activity G - Diagnoses and services hydraulic systems
Table of contents
Task G-18 Diagnoses hydraulic systems
Task Descriptor
Transport trailer technicians diagnose hydraulic systems as a critical task for the safe operation of the units’ accessories. Accurate diagnostics are required for correct repair. Transport trailer technicians work with many types of hydraulic systems which include self-contained hydraulic systems, and auxiliary- powered hydraulic systems which are powered by the towing vehicle.
G-18.01 Diagnoses self-contained hydraulic systems
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NV | yes | NV | NV | NV | yes | yes | ND | yes | yes | NV | NV | ND |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| G-18.01.01P | select and use diagnostic tools and equipment | diagnostic tools and equipment are selected and used according to task and manufacturers’ specifications |
| G-18.01.02P | inspect hydraulic systems | hydraulic systems are inspected using diagnostic tools and equipment |
| G-18.01.03P | perform sensory inspections | sensory inspections are performed to identify conditions |
| G-18.01.04P | identify faults with self-contained hydraulic system components | faults with self-contained hydraulic system components are identified |
| G-18.01.05P | interpret diagnostic results | diagnostic results are interpreted to determine next steps |
| G-18.01.06P | interpret hydraulic schematic | hydraulic schematic is interpreted and used to diagnose faults |
Range of variables
- diagnostic tools and equipment include: flowmeters, pressure gauges, thermal imaging devices
- conditions include: leaks, temperature, contaminated hydraulic fluid, lack of hydraulic fluid
- components include: tanks, pumps, valves, sensors, actuators, hoses, controls
- next steps include: repairs, component replacement, further diagnosis
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| G-18.01.01L | demonstrate knowledge of self-contained hydraulic systems, their components, characteristics, applications and operation | identify types of self-contained hydraulic systems and their components, and describe their characteristics, applications and operation |
| identify power sources | ||
| identify types of hydraulic fluids and describe their properties | ||
| describe hydraulic pressures, flows and volumes | ||
| identify and interpret symbols on hydraulic schematics, and describe how they are applied to diagnosing self-contained hydraulic systems | ||
| G-18.01.02L | demonstrate knowledge of procedures to diagnose self-contained hydraulic systems and their components | identify diagnostic tools and equipment used to diagnose self-contained hydraulic systems and their components, and describe their applications and procedures for use |
| describe procedures to diagnose self-contained hydraulic systems and their components | ||
| identify hazards and describe safe work practices while diagnosing self-contained hydraulic systems and their components | ||
| identify inspections performed to diagnose self-contained hydraulic systems and their components | ||
| identify possible conditions and faults found while performing inspections |
Range of variables
- components include: tanks, pumps, valves, sensors, actuators, hoses, controls
- types of self-contained hydraulic systems include: detachable float trailers, power lift gates, dock leveling systems, tilt deck
- power sources include: air, electrical, engine-driven
- diagnostic tools and equipment include: flowmeters, pressure gauges, thermal imaging devices
- hazards include: hydraulic fluid injection, high temperature burn, fire
- conditions include: leaks, temperature, contaminated hydraulic fluid, lack of hydraulic fluid
G-18.02 Diagnoses auxiliary-powered hydraulic systems
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NV | yes | NV | NV | NV | yes | yes | ND | yes | yes | NV | NV | ND |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| G-18.02.01P | select and use diagnostic tools and equipment | diagnostic tools and equipment are selected and used according to task and manufacturers’ specifications |
| G-18.02.02P | inspect hydraulic system | hydraulic system is inspected using diagnostic tools and equipment |
| G-18.02.03P | perform sensory inspections | sensory inspections are performed to identify conditions |
| G-18.02.04P | identify faults with auxiliary-powered hydraulic system components | faults with auxiliary-powered hydraulic system components are identified |
| G-18.02.05P | interpret diagnostic results | diagnostic results are interpreted to determine next steps |
| G-18.02.06P | interpret hydraulic schematic | hydraulic schematic is interpreted and used to diagnose faults |
Range of variables
- conditions include: leaks, temperature, contaminated oil, lack of oil
- components include: valves, sensors, actuators, hoses, controls
- next steps include: repairs, component replacement, further diagnosis
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| G-18.02.01L | demonstrate knowledge of auxiliary-powered hydraulic systems, their components, characteristics, applications and operation | identify types of auxiliary-powered hydraulic systems and their components, and describe their characteristics, applications and operation |
| identify types of hydraulic fluids and describe their properties | ||
| describe hydraulic pressures, flows and volumes | ||
| identify and interpret symbols on hydraulic schematics, and describe how they are applied to diagnosing auxiliary-powered systems | ||
| G-18.02.02L | demonstrate knowledge of procedures to diagnose auxiliary-powered hydraulic systems and their components | identify diagnostic tools and equipment used to diagnose auxiliary-powered hydraulic systems and their components, and describe their applications and procedures for use |
| describe procedures to diagnose auxiliary-powered hydraulic systems and their components | ||
| identify hazards and describe safe work practices while diagnosing auxiliary-powered hydraulic systems and their components | ||
| identify inspections performed to diagnose auxiliary-powered hydraulic systems and their components | ||
| identify possible conditions and faults found while performing inspections |
Range of variables
- components include: valves, sensors, actuators, hoses, controls
- types of auxiliary-powered hydraulic systems include: dump trailers, walking floors, refuse trailers
- hazards include: hydraulic fluid injection, high temperature burn, fire
- conditions include: leaks, temperature, contaminated oil, lack of oil
Task G-19 Services hydraulic systems
Task Descriptor
Transport trailer technicians perform preventative maintenance on hydraulic systems to keep them operating at optimal conditions. Repairs to hydraulic systems are done to correct faulty operating conditions.
G-19.01 Maintains hydraulic systems
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NV | yes | NV | NV | NV | yes | yes | ND | yes | yes | NV | NV | ND |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| G-19.01.01P | select and use tools and equipment | tools and equipment are selected and used according to task and manufacturers’ specifications |
| G-19.01.02P | perform preventative maintenance checks | preventative maintenance checks are performed according to company procedures, and manufacturers’ maintenance procedures and schedules |
| G-19.01.03P | flush and service filtering systems and change hydraulic fluid | filtering systems are flushed and serviced and hydraulic fluid is changed according to manufacturers’ requirements |
| G-19.01.04P | select hydraulic fluid | hydraulic fluid is selected according to ambient temperature, environmental conditions and system requirements |
| G-19.01.05P | perform visual inspection | visual inspection is performed during maintenance to identify faults |
| G-19.01.06P | lubricate system components | system components are lubricated according to manufacturers’ specifications and recommendations |
| G-19.01.07P | operate and test systems to assess operation | systems are operated and tested to assess operation |
Range of variables
- preventative maintenance checks include: hydraulic fluid levels, condition of hoses, pressure relief valve settings, visual inspections
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| G-19.01.01L | demonstrate knowledge of self-contained hydraulic systems, their components, characteristics, applications and operation | identify types of self-contained hydraulic systems and their components, and describe their characteristics, applications and operation |
| identify power sources | ||
| identify types of hydraulic fluids and describe their properties | ||
| describe hydraulic pressures, flows and volumes | ||
| G-19.01.02L | demonstrate knowledge of auxiliary-powered hydraulic systems, their components, characteristics, applications and operation | identify types of auxiliary-powered hydraulic systems and their components, and describe their characteristics, applications and operation |
| G-19.01.03L | demonstrate knowledge of procedures to maintain hydraulic systems and their components | identify tools and equipment used to maintain hydraulic systems and their components, and describe their applications and procedures for use |
| describe procedures to maintain hydraulic systems and their components | ||
| identify hazards and safe work practices while maintaining hydraulic systems and their components | ||
| G-19.01.04L | demonstrate knowledge of regulatory requirements to use and dispose of hydraulic fluids | identify and interpret standards and regulations to use and dispose of hydraulic fluids |
Range of variables
- self-contained hydraulic system components include: tanks, pumps, valves, sensors, cylinders, hoses, controls
- types of self-contained hydraulic systems include: detachable float trailers, power lift gates, dock leveling systems
- power sources include: air, electrical, engine-driven
- auxiliary-powered hydraulic system components include: valves, sensors, actuators, hoses, controls
- types of auxiliary-powered hydraulic systems include: dump trailers, walking floors, refuse trailers
- hazards include: hydraulic fluid injection, high temperature burn, fire
G-19.02 Repairs hydraulic systems
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NV | yes | NV | NV | NV | yes | yes | ND | yes | yes | NV | NV | ND |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| G-19.02.01P | select and use tools and equipment | tools and equipment are selected and used according to task and manufacturers’ specifications |
| G-19.02.02P | remove and replace hydraulic components | hydraulic components are removed and replaced according to manufacturers’ procedures |
| G-19.02.03P | recondition hydraulic components | hydraulic components are reconditioned according to manufacturers’ specifications and procedures |
| G-19.02.04P | bleed system after replacing hydraulic components | system is bled after replacing hydraulic components according to manufacturers’ specifications and procedures |
| G-19.02.05P | repair cracks in mounting and unit structure | cracks are repaired in mounting and unit structure according to company policies and procedures |
| G-19.02.06P | adjust components | components are adjusted according to manufacturers’ specifications and procedures |
| G-19.02.07P | complete repair | repair is completed by verifying operation of hydraulic system |
Range of variables
- mounting and unit structure include: box frames, deck extension plates, lift rails
- components (to be adjusted) include: pressure relief valves, flow control valves
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| G-19.02.01L | demonstrate knowledge of self-contained hydraulic systems, their components, characteristics, applications and operation | identify types of self-contained hydraulic systems and their components, and describe their characteristics, applications and operation |
| identify power sources | ||
| identify types of hydraulic fluids and describe their properties | ||
| describe hydraulic pressures, flows and volumes | ||
| identify and interpret symbols on hydraulic schematics, and describe how they are applied to repairing hydraulic systems | ||
| G-19.02.02L | demonstrate knowledge of auxiliary-powered hydraulic systems, their components, characteristics, applications and operation | identify types of auxiliary-powered hydraulic systems and their components, and describe their characteristics, applications and operation |
| G-19.02.03L | demonstrate knowledge of procedures to repair hydraulic systems and their components | identify tools and equipment used to repair hydraulic systems and their components, and describe their applications and procedures for use |
| describe procedures to remove, repair, replace, reinstall, recondition and adjust hydraulic systems and their components | ||
| identify hazards and safe work practices while performing repairs | ||
| describe procedures to verify repair of hydraulic systems and their components | ||
| G-19.02.04L | demonstrate knowledge of regulatory requirements to use and dispose of hydraulic fluids | identify and interpret standards and regulations to use and dispose of hydraulic fluids |
Range of variables
- components (to be adjusted) include: pressure relief valves, flow control valves
- types of self-contained hydraulic systems include: detachable float trailers, power lift gates, dock leveling systems
- self-contained hydraulic system components include: tanks, pumps, valves, sensors, cylinders, hoses, controls
- power sources include: air, electrical, engine-driven
- auxiliary-powered hydraulic system components include: valves, sensors, actuators, hoses, controls
- types of auxiliary-powered hydraulic systems include: dump trailers, walking floors, refuse trailers
- hazards include: hydraulic fluid injection, high temperature burn, fire