ODT 2030 - Basic Hydraulics
Clock Hours: 107
Delivery Mode
on-ground
Course Description:
This course is designed to provide students with in-depth knowledge and skills for servicing diesel hydraulic systems. Safety and proper tool use are emphasized throughout this course. Specific topics include diagnostic and repair of hydraulic systems. As part of this course, students participate in servicing activities associated with hydraulic systems. Workplace Employability Skills Task lists should be incorporated into the Off-Road Diesel Program.
Student Learning Outcomes:
Safety
Identify and practice general shop safety rules and procedures.
Utilize safe procedures for handling of tools and equipment.
Identify and use proper placement of floor jacks and jack stands.
Identify and use proper procedures for safe lift operation.
Utilize proper ventilation procedures for working within the lab/shop area.
Identify marked safety areas.
Identify the location and the types of fire extinguishers and other fire safety equipment.
Demonstrate knowledge of the procedures for using fire extinguishers and other fire safety equipment.
Identify the location and use of eye wash stations.
Identify the location of the posted evacuation routes.
Comply with the required use of safety glasses, ear protection, gloves, and shoes during lab/shop activities.
Identify and wear appropriate clothing for lab/shop activities.
Secure hair and remove jewelry for lab/shop activities.
Demonstrate awareness of the safety aspects of supplemental restraint systems (SRS), electronic brake control systems, and hybrid vehicle high voltage circuits.
Demonstrate awareness of the safety aspects of high voltage circuits (such as high intensity discharge (HID) lamps, ignition systems, injection systems, etc.).
Locate and demonstrate knowledge of material safety data sheets (MSDS).
Tools and Equipment
Identify tools and their usage in equipment applications.
Identify standard and metric designation.
Demonstrate safe handling and use of appropriate tools.
Demonstrate proper cleaning, storage, and maintenance of tools and equipment.
Demonstrate proper use of precision measuring tools Examples: micrometer, dial-indicator, dial-caliper. Hydraulic Systems
Identify system type (closed and open) and verify proper operation.
Read and interpret system diagrams and schematics.
Perform system temperature, pressure, flow, and cycle time tests; determine needed action.
Verify placement of equipment /component safety labels and placards; determine needed action.
Pumps
Identify system fluid type.
Identify causes of pump failure, unusual pump noises, temperature, flow, and leakage problems; determine needed action.
Determine pump type, rotation, and drive system.
Remove and install pump; prime and/or bleed system.
Inspect pump inlet for restrictions and leaks; determine needed action.
Inspect pump outlet for restrictions and leaks; determine needed action.
Identify type of filtration system; verify filter application and flow direction.
Service filters and breathers.
Identify causes of system contamination; determine needed action.
Take a hydraulic oil sample for analysis.
Check reservoir fluid level and condition; determine needed action.
Inspect and repair or replace reservoir, sight glass, vents, caps, mounts, valves, screens, supply and return lines. Hoses, Fittings, and
Connections
Diagnose causes of component leakage, damage, and restriction; determine needed action.
Inspect hoses and connections (length, size, routing, bend radii, and protection); repair or replace as needed.
Assemble hoses, tubes, connectors, and fittings in accordance with manufacturers’ specifications; use proper procedures to avoid contamination.
Inspect and replace fitting seals and sealants.
Control Valves
Pressure test system safety relief valve; determine needed action.
Perform control valve operating pressure and flow tests; determine needed action.
Inspect, test, and adjust valve controls (electrical/electronic, mechanical, and pneumatic).
Inspect pilot control valve linkages, cables, and PTO controls; adjust, repair, or replace as needed.
Actuators
Identify actuator type (single/double acting, multi-stage/telescopic, and motors).
Identify the cause of seal failure; determine needed repairs.
Identify the cause of incorrect actuator movement and leakage (internal and external); determine needed repairs.
Inspect actuator mounting, frame components, and hardware for looseness, cracks, and damage; determine needed action.
Remove, repair, and/or replace actuators in accordance with manufacturers’ recommended procedures.
Inspect actuators for dents, cracks, damage, and leakage; determine needed action.
Purge and/or bleed system in accordance with manufacturers’ recommended procedures.
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