I. Replacing only damaged parts while neglecting periodic tightening
Many mechanics replace only damaged wire ropes or bearings while consistently neglecting the periodic tightening of mast section connection bolts and anchoring tie rods. In high-wind conditions, loose bolts can lead to structural fatigue cracking, significantly reducing the machine's lifespan.
II. Adding lubricant without cleaning
New lubricant is often added directly to the slewing mechanism and hoisting gearbox without removing old oil and metal filings. These filings cause continuous wear on gears and bearings, leading to the premature failure of the transmission mechanism.
III. Checking wire ropes only for surface breaks while ignoring internal corrosion
Inspections often focus solely on the surface of the wire rope, overlooking internal corrosion caused by water ingress into the core. Internal corrosion progresses more rapidly at coastal or rainy construction sites, creating a high risk of sudden rope breakage.
IV. Performing only temporary repairs on electrical components without dust or moisture protection
Electrical controls in the cab and contactors often receive only temporary fixes without proper waterproofing or dustproofing. In high-temperature or humid environments, frequent short circuits and burnouts accelerate the aging of the entire control system.
V. Masking structural hazards through overload test runs
Habitually performing overload test lifts after maintenance can cause minor structural cracks to expand rapidly under the stress of the overload, inflicting irreversible structural damage on the crane.
Conclusion
Proper, periodic maintenance allows a tower crane to operate smoothly for over a decade, whereas careless or incorrect maintenance practices lead to premature aging and equipment failure. Only by strictly adhering to the maintenance manual for inspections, tightening, lubrication, and rust prevention can the service life of a tower crane be maximized.
