Skytech

Industry Training

ST36 Hydraulic Braking System (4 days)

This module will cover the various types of hydraulic brake systems in use on mobile equipment. The student is able to perform repairs following manufacturers recommendations and safe work practices of hydraulic brake systems. Upon successful completion, the student is able to: Define the fundamentals of hydraulic brake systems. Describe the composition, construction features, types, styles, and applications of hydraulic brake systems. Explain the principles of operation of hydraulic brake systems. Perform the inspection, testing, and diagnostic procedures for hydraulic brake systems. Perform the repair and service procedures for hydraulic brake systems.

Module Content:

1. Define the fundamentals of hydraulic brake systems.
   • hydraulic brake schematics
     • flow tracing
     • component location and identification
   • wheel ends
     • multi-dics
     • inboard/outboard
     • spring applied hydraulic release
     • hydraulic applied spring release
     • external disc brakes
     • interpretation of brake schematics
2. Describe the construction, composition features, types, styles, and application of hydraulic brake systems.
   • system components
     • charge control valves
     • accumulators
     • shuttle valves
     • directional valves
     • flow valves
     • sequence valves
     • pumps
   • wheel components
     • pistons
     • seals
     • springs
     • disc/plates
3. Explain the principles of operation of hydraulic brake systems.
   • system components
     • charge control valves
     • accumulators
     • shuttle valves
     • directional valves
     • flow valves
     • sequence valves
     • pumps
   • wheel components
     • pistons
     • seals
     • springs
     • disc/plates
4. Perform inspection, testing, and diagnostic procedures following manufacturers recommendations and safe work practices and perform assigned operations on hydraulic brake systems.
   • check and adjust charge pressures (kick-in/out)
   • check accumulator charge pressure
   • charge accumulator
   • interpret hydraulic brake schematics
   • interpret potential malfunctions using manufacturers diagnostic troubleshooting procedures
   • interpret test results and performance problems
     • noises
     • drag or lock up
     • vibrations
     • imbalance
   • check and adjust wheel end brake pressure
   • check and adjust wheel end lubrication and cooling pressure
5. Recommend reconditioning or repairs following manufacturers recommendations and perform assigned operations of hydraulic brake systems.
   • identify corrective repair actions according to manufacturers recommended procedures
   • disassemble and assemble wheel end assembly 
     • spring applied, hydraulic release
     • hydraulic applied, spring release external dry disc

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