Oilfield:

Cementers, Blenders, Chem. Vans, N2 Trucks, Frac Pumps

Civic:

Plow/Spreader Trucks, Railway Track Maintenance Machines

Construction:

Backhoes, Wheel Loaders, Graders, Scrapers

Farm - Agriculture:

Tractors, Harvesters

Forestry:

Feller Bunchers, Harvesters, Log Loaders, Skidders

Who should attend?

This course is for maintenance mechanics and technicians, and maintenance foremen/supervisors who are charged with the care of load sensing hydraulic systems.

Load sensing systems use pressure feedback from the loaded actuators to constantly modify and control the pump’s displacement. The result is less wasted energy at the prime mover and greater flow accuracy within the system. These features along with electronic proportional valves add complexity to the system.

Adjustments and the ‘Ten Step Troubleshooting Process’ ( TSTP ) are covered along with plenty of schematic reading practice specific to load sense systems.

This two-day course is taught with circuit simulation software, oilfield and mobile machinery schematics and on-screen simulations, and through instructor guided hands-on study of individual cut-away hydraulic components.

• Explain “load sense” or “flow compensating” principles
• Analyze load sense circuit schematics
• Adjust load sense pumps and set the stand-by pressure
• Analyze common electronic proportional valves
• Troubleshoot common load sense system problems
• Work safely around hydraulic systems

HYDRAULIC THEORY

Objective: Explain the principles of hydraulics

Activity: Predict fluid behaviour in various systems

LOAD SENSING SYSTEMS DESIGN

Objective: Analyse circuit components and their relationships

Activity: Interpret symbols and component connections on typical systems

LOAD SENSING DIRECTIONAL VALVES

Objective: Explain the features of common load sense proportional directional valves

Activity: Interpret catalogue data to determine valve port, functions/features

LOAD SENSING (FLOW COMPENSATING) PUMPS

Objective: Identify pump compensator connections and functions

Activity: Determine pump control response to various machine load scenarios

CIRCUIT TROUBLESHOOTING

Objective: List common faults and remedies in load sense circuits

Activity: Diagnose faults on simulated systems and list the causes

SAFETY

Objective: List common hydraulic hazards and safe procedures

Activity: Determine procedures for safe work on hydraulic systems