Hydraulic Systems Expert Witnesses

White Heath, Illinois

Mechanical Engineering, Equipment & Machinery - Mining Equipment, Construction Equipment, Heavy Equipment, Off-Highway Trucks, Large Mining Trucks, Hydraulic Systems, Exhaust Systems, Structural Analysis, Fatigue Failure, Bolted Joint Failure, Finite Element Analysis, Machinery Accident, Equipment Fire, Product Defect, Catastrophic Failure, Loss of Control

Eric Defend is a licensed Professional Mechanical Engineer (P.E.) with extensive experience in the design, testing, and analysis of large construction and mining equipment. At Caterpillar Inc., he has led engineering projects addressing critical safety, reliability, and performance issues in hydraulic, intake/exhaust, cooling, and structural systems for off-highway and large mining trucks. Mr. Defend specializes in identifying the root cause of complex mechanical failures, including those related to catastrophic breakdowns, warranty disputes, and safety incidents. His work has included conducting detailed failure analyses, overseeing prototype testing, leading design reviews for high-risk issues, and resolving major product reliability concerns. He has provided clear, data-driven findings to technical and non-technical stakeholders, making him adept at explaining complex engineering principles in plain language. Areas of Expertise • Heavy equipment design and failure analysis (con...

Houston, Texas

Engineering, Equipment & Machinery - Hydraulic Consultant, Hydraulic Systems, Pneumatic Systems, Hydraulic Pumps, Hydraulic Cylinders, Hydraulic Motors, Hydraulic Valves, Hydraulic Hoses, Hydraulic Manifolds, Motion Control, Hydraulic Design, Hydraulic Accumulators, Compressors, Schematics, Hydraulic Seals, Hydraulic Filtration, Pressure, Construction, Mining, Oil & Gas

Four decades of experience in the design, application, implementation, troubleshooting and service of complex hydraulic and pneumatic systems and related control components, including: • The use of standard and electrohydraulic components and circuitry in machine control • Integration of electronic devices for actuator control, including feedback and diagnostics • Manifold design, 3D solid modeling, and hydraulic circuit and component simulation and analysis • Hydraulic power unit (HPU) and closed-circuit hydrostatic transmission system design • Efficiency and throughput improvements for underperforming systems • Troubleshooting and repair of hydraulic/pneumatic machine control components and systems • Interpretation and implementation of ISO/SAE/ANSI/ASME fluid power standards • International Fluid Power Society Credentials: - Certified Fluid Power Systems Designer (CFPSD), February 2012 - Certified Fluid Power Accredited Instructor (CFPAI), August 2013 - Ce...