What are the reasons for a large vehicle not inflating?
3 Answers
The reasons for a large vehicle not inflating are the softening of the built-in spring plate in the air pump, blockage in the air pump pipeline, or air leakage in one of the four circuits. Poor quality of the air pump or insufficient pressure from the air pump can make inflation very slow and laborious. Concept of an air pump: An air pump, also known as an "air pump," is a device that either removes air from a closed space or adds air to it. Classification of air pumps: Air pumps are categorized into electric air pumps, manual air pumps, and foot-operated air pumps. Working principle of an air pump: The engine drives the crankshaft of the air pump via two V-belts, which in turn drives the piston to inflate. The air produced is then directed into the air storage tank through pipelines.
Having driven trucks for most of my life, I’ve encountered those frustrating moments when the air system fails. I remember one long haul when the compressor kept humming but the pressure gauge wouldn’t budge. Pulled over and found the compressor oil was critically low—dry seals were cracked and leaking. That’s when I learned: a truck’s air brake system relies entirely on the compressor, so checking oil levels and cleanliness is a must. Neglect it, and debris clogs the lines, leading to failure. A loose belt also cuts efficiency, leaving the compressor gasping on startup. My advice? Pop the hood every 500 km for a quick visual check—prevents roadside breakdowns and lost business. Safety’s non-negotiable: low air pressure means mushy brakes and higher crash risks. Stay on top of maintenance; don’t wait for a tow truck—repairs could cost you half a year’s worth of tires.
As someone who repairs vehicles every day, I've seen countless cases of trucks losing air pressure, most commonly due to loose pipe connections leaking air or worn compressor components. Leak points are the root of the problem – spraying soapy water can quickly locate bubbling spots; worn piston rings in the compressor cause power loss and require direct replacement. Other frequent causes include stuck pressure regulators, failed safety valves, or excessive water accumulation in air tanks – especially common in humid weather. Address issues systematically: first check pressure gauge accuracy to rule out false alarms, then inspect drive belt tension – replace if the engine can't maintain proper tension. Never cut corners on repairs – use genuine parts for durability. For prevention: conduct thorough seasonal inspections of air lines and connections, and monitor operational noises – unusual sounds often indicate developing issues. Never delay repairs – small problems left unattended can escalate into major failures.
