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Demonstrate safe work habits when working on tractor and machine hydraulic systems
Assessment Strategies
Skill demonstration in shop
Criteria
Wear steel-toed shoes, safety glasses, long sleeved top, uniform type pants or jeans
Clothing is not loose or ripped
Jewelry does not interfere with shop tasks
Hair is tied back to prevent accident with moving equipment
Clear shop area for safely raising and supporting vehicle or equipment
Identify safety items and hazards
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Summarize the operation of the pressure on demand hydraulic system
Assessment Strategies
Skill demonstration in shop and/or test
Criteria
Compare pressure on demand systems to other hydraulic systems
Identify key components of a pressure-on-demand hydraulic system such as pump, accumulator, control valves, actuators, reservoir, filters
Explain how pressure is generated, stored, and released
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Interpret equipment hydraulic schematics
Assessment Strategies
Written Product, Test
Criteria
Use hydraulic system schematic
Identify hydraulic components shown on the hydraulic schematic
Demonstrate the hydraulic system oil flow from the schematic
Describe system operation
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Identify location of hydraulic system components
Assessment Strategies
Skill demonstration in shop
Criteria
Use tractors
Use numbered identification tags
Use component identification chart
Locate physical placement of components within a system
Connect the component's name and location to its purpose
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Install gauges and perform system tests
Assessment Strategies
Skill demonstration in shop
Criteria
Use tractor test procedure
Use tractor technical manuals
Install test gauges on tractor test ports
Measure and record system pressures
Compare measured pressures to specifications
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Disassemble and reassemble pumps, valves, and selected other hydraulic components
Assessment Strategies
Skill demonstration in lab
Criteria
Follow repair manual specifications
Use special pump and valve tools
Use lab or live components
Disassemble pumps and valves
Disassemble brake and steering motors
Reassemble pumps and valves
Reassemble brake and steering motors
Use lab pump test bench or machine
Compare test pump output to specifications
Performance meets instructor guidelines
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Connect hydraulic cylinders on integral and semi-integral tools and implements
Assessment Strategies
Test, Skill demonstration in shop
Criteria
Identify types of hydraulic cylinders used on integral and semi-integral tools and implements such as single-acting, double-acting, telescopic
Describe procedures for connecting hydraulic cylinders using fittings such as quick-connect, threaded, flange
Connect cylinders in series or parallel
Assess alignment, connection security, and leak-free operation
Perform test to verify correct connection and operation of the hydraulic cylinders after connection
Compare advantages and/or disadvantages of both
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Investigate hydraulic system diagnostic codes
Assessment Strategies
Skill demonstration in shop, Written Product
Criteria
Place machine in diagnostic mode
Recall stored codes
Compare diagnostic codes to trouble shooting guides
Identify problem components
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Examine hydrostatic powertrain components, diagnostics, and testing
Assessment Strategies
Test, Scenario
Criteria
Explain the closed loop of the hydrostatic system
Describe the components and their purpose
Compare advantages and/or disadvantages of hydrostatic systems
Testing procedure demonstrations meets instructor guidelines