Blast Hole Drills

Learn to:

Interpret complex blast hole drill schematics
Test for correct pump flows and relief pressures
Verify normal and faulted travel/propel systems
Describe counterbalance functions and tests
Measure valve piloting signals and pressures

In this customized course, mine mechanics, millwrights, heavy equipment technicians, team leaders, planners and reliability specialists learn the hydraulic systems in use on Bucyrus 49HR (now Caterpillar MD664) and P&H 120A blast hole drills. On-screen simulations and Live Schematics bring the systems to life for intensive and rigorous training.

Participants learn to maintain and troubleshoot blast hole drill systems for maximum availability. A method of analysis for determining faults based on "knowing what normal is" will be taught taught along with our Ten Step Troubleshooting Process. Schematic reading and safe work practices are core topics throughout.

Travel Circuitry

Objective: Explain the functions of a closed loop propel system

Activities: Diagnose typical hydrostatic system problems

Know the undercarriage hydraulic functions cold

Mast Raise and Lower Functions

Objective: Identify the components of the mast raising circuits

Activities: Test valve piloting functions and port relief settings

Solidify your skills with counterbalance valves

Jack Cylinder Circuits

Objective: Identify the components and their functions in the jack cylinder circuits

Activities: Diagnose auto-level malfunctions

Decode the mysteries of pressure compensated flow controls

Pipe Rack Position Cylinders

Objective: Describe functions of components on the pipe rack position circuits

Activities: Test counterbalance settings and confirm valve pilot pressures

Know the six-port, two-position selector valves cold

The Hydraulic Power Unit

Objective: Identify pump types and system pressure relief and unloading valves

Activities: Design pump volumetric and load tests to aid in troubleshooting

Know the key maintenance principles for long pump life

Auxiliary and Accessory Systems

Objective: Interpret auxiliary systems and circuit designs

Activity: Identify schematic paths for auxiliary winch, pin locks, dust seals and dust curtains

Know your grease and lube systems cold

Where to go from here?

Blast Hole Drill Hydraulic Systems is a specialty mining class, along with Hydraulic Shovels, and Haul Truck Hydraulics. If you enjoyed this class, consider taking your troubleshooting farther with our general hydraulics course, How to Maintain & Troubleshoot Hydraulic Systems, or learn more mobile hydraulic systems with Hydrostatic Drive Troubleshooting Boot Camp.

CD Industrial Group Inc.