Even the Hiab 650, a paragon of reliability, has occasional issues. Here’s what the manual says to check before calling a technician.
Any "spongy" feeling in the levers or erratic boom movement. Truck Loaders Hiab 650 Manual
Perform a full service and statutory thorough examination (e.g., LOLER in the UK). Truck Loaders Common Warning Signs Stop operations immediately if you notice: Strange Noises: Grinding, clanking, or increased loudness during movement. Heat/Smell: Even the Hiab 650, a paragon of reliability,