Dump truck tipping failure is one of the frequent breakdowns for heavy duty tipper trucks, mining dump trucks and HOWO dump trucks working on quarry sites, earthmoving projects and mine construction zones. Many fleet owners and truck operators encounter problems such as slow lifting, weak lifting force, or the hydraulic cylinder cannot lift the dump box at all. Understanding the common causes of dump truck lifting failure helps you carry out daily maintenance and reduce downtime on site.https://www.hjtrailer.com/truck/dump-truck/shacman-delong-light-dump-truck.html
The first common cause is insufficient hydraulic oil or deteriorated hydraulic oil. Long-term use will lead to oil contamination, oil thinning and oil leakage of the hydraulic system. Dirty hydraulic oil will block the hydraulic filter and damage the hydraulic pump, which directly causes the dump tipper to fail to lift normally. It is necessary to check the hydraulic oil level and oil quality regularly for your Sinotruk HOWO dump truck, Shacman tipper truck and other heavy dump vehicles.
Second, hydraulic pump damage and insufficient pump pressure. The hydraulic pump is the core power component of the lifting system. If the pump wears out, the output pressure will drop, and the dump box cannot be lifted under full load. Overloading the mining dump truck for a long time will greatly accelerate the wear of the hydraulic pump.
Third, malfunction of the hydraulic control valve and blocked oil pipeline. The control valve is responsible for switching the lifting and lowering actions. Valve jamming, valve seal damage or blocked oil pipes will interrupt the oil circuit circulation, resulting in tipping failure. Loose joints and oil pipe cracking also cause hydraulic oil leakage and pressure loss.
Fourth, hydraulic cylinder failure. The cylinder piston seal ring aging, air entering the cylinder and cylinder scratch are typical faults. Once the seal ring leaks internally, the pressure cannot be maintained, and the dump box will sink or fail to lift. This fault often appears on dump trucks that work continuously in dusty mine environments.
Fifth, improper operation and overload. Exceeding the rated payload of the dump tipper is the most common human factor. Overloading puts huge pressure on the whole hydraulic lifting system. In addition, starting lifting on a tilted ground will also cause abnormal stress on the cylinder and lead to tipping system failure.
Maintenance tips: Check hydraulic oil, oil pipes and seals regularly; strictly avoid overloading; keep the hydraulic system clean; replace filter elements and hydraulic oil on schedule. If you meet tipping failure, you can check the oil level and oil leakage first, then test the pump pressure.
