How to determine if a Pneumatic Anchor Cable Tensioning needs repair?
Jul 24, 2026| I. Obvious Faults Requiring Immediate Repair
1. Hydraulic System Abnormalities: Oil seepage, dripping, or spraying occurs at the jack, oil pump, oil pipe joints, and valve blocks; pressure drops rapidly during pressurized operation, failing to establish or maintain design pressure.
2. Jack Abnormalities: Cylinder extension/retraction is choppy, creeping, or produces abnormal noises; extension fails to return to the original position, returns slowly, or becomes skewed.
3. Instrument Component Faults: Pressure gauge pointer does not return to zero, fluctuates, or is unresponsive; dial is broken; calibration period has expired.
4. Damaged Supporting Components: High-pressure oil pipe outer sheath cracks, bulges, exposed steel wire, loose joints; pneumatic pump makes excessive noise and fails to pressurize; anchor clamps are worn and have chipped teeth.
II. Situations Requiring Replacement/Scrapping
1. Jack cylinder is permanently deformed, with internal wall scoring; repeated seal replacements do not resolve the leak.
2. Cracks appear in critical load-bearing components such as the cylinder body and pump body; significant deformation and eccentricity occur during tensioning.
3. Performance requirements are still not met after multiple repairs; tension force is less than 80% of the rated value.
4. High-pressure oil pipes have reached their mandatory replacement period of 1-2 years; aging and hardening pose a risk of pipe bursting.
5. Pressure gauges are completely inaccurate and cannot be calibrated; the equipment lacks mining safety markings and is an obsolete model.
III. Determination of Hidden Performance Degradation
1. Under normal operation, the equipment's pressure increase rate is significantly slower, and operating efficiency decreases drastically under the same conditions.
2. After three or more consecutive tensioning operations, abnormal pressure drops occur during the pressure holding phase, and the problem persists even after ruling out operational factors.
3. Abnormal vibration and noise occur when the equipment is running under no-load; disassembly reveals excessive wear on internal parts.
