Material Handling Equipment Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete question bank is available as a PDF below. ELECTRIC FORKLIFTS & REACH TRUCKS (TRACTION, STEER & MAST HYDRAULICS) Q1 An electric counterbalance forklift lifts rated loads normally, but moves at barely 2 km/h in turtle creep speed. What input interlock failed? Answer Seat presence safety switch open circuit, handbrake microswitch stuck engaged, or mast height limit switch stuck active (locking drive into slow travel speed while forks are elevated). Q2 A 48V electric reach truck hydraulic lift pump groans loudly and mast lifting shudders violently. Where is the hydraulic fault? Answer Air ingestion into the hydraulic lift pump suction line, low hydraulic oil level in the tank, or a clogged suction oil strainer causing pump cavitation during high-displac...