1. Slow Unloading Speed & Long Discharging Time

Failure Causes

1. The air filter of the diesel compressor is blocked by cement dust, leading to insufficient air intake and low air pressure.
2. Tiny holes or cracks on pneumatic pipelines cause continuous air leakage.
3. Fluidized breathable cloth is covered by caked cement powder, blocking air circulation.

Quick Fixes

1. Dismantle and clean the air filter with compressed air; replace the filter element if it is severely clogged.
2. Check all air hoses and pipe joints, tighten loose clamps, wrap leakage points with sealing tape temporarily; replace aging cracked hoses after finishing work.
3. Run the compressor for 10 minutes after unloading to blow off residual powder; scrape hardened cement on the breathable cloth manually.

2. High Powder Residue Left Inside the Tank

Failure Causes

1. Local damage or displacement of fluidized bed breathable cloth leads to uneven air distribution.
2. Large blocks of cement cake accumulate at the tank bottom, which cannot be fluidized by compressed air.
3. The tank’s internal slope angle is unreasonable, making powder hard to slide to the discharge outlet.

Quick Fixes

1. Open the manhole to check the breathable cloth; re-tighten the pressing strips or replace broken cloth on site.
2. Use a long scraper to break large cement blocks completely before starting unloading.
3. Avoid storing damp cement inside the tank for more than 2 days to prevent hard caking.

3. Air Compressor Overheating & Automatic Shutdown

Failure Causes

1. The cooling fan and heat dissipation radiator are covered with thick cement dust, resulting in poor heat dissipation.
2. Compressor engine oil is insufficient or deteriorated, increasing operating friction.
3. Long-time continuous unloading without rest, exceeding the compressor’s working load limit.

Quick Fixes

1. Clean dust on the radiator and fan with high-pressure air gun to restore heat dissipation efficiency.
2. Check the oil dipstick; add special compressor oil or replace deteriorated oil and filter elements.
3. Stop the machine for 15 minutes to cool down after every 30 minutes of continuous unloading.

4. Air Pipeline Leakage & Insufficient Air Pressure

Failure Causes

1. Long-term vibration rubs the air hose against the chassis frame, causing abrasion and rupture.
2. Sealing rings at pipeline joints age and lose elasticity.
3. Loose connecting bolts between the air storage tank and main pipeline.

Quick Fixes

1. Wrap small broken hose sections with high-pressure rubber tape for temporary use; replace damaged hoses after returning to the yard.
2. Replace aging rubber sealing gaskets at all pipe joints.
3. Tighten all pipeline fixing bolts evenly to eliminate gaps.

5. Tank Body Rust & Small Leakage Holes

Failure Causes

1. Alkaline cement powder corrodes the tank coating, leading to paint peeling and rust.
2. Rainwater accumulates inside the tank after transporting damp lime powder, accelerating steel corrosion.
3. Weld seams lack anti-rust treatment and rust through easily.

Quick Fixes

1. Grind rust spots clean, apply epoxy anti-rust primer and touch up topcoat to block corrosion spread.
2. Fully open all manholes and discharge ports to ventilate and dry the tank after rainy transport.
3. For tiny leakage holes, use special metal repair glue for temporary sealing; arrange full welding repair at the factory.

6. Safety Valve Failure (No Pressure Relief / Constant Air Discharge)

Failure Causes

1. Cement dust enters the valve core and jams the spring structure.
2. Long-term high pressure causes spring fatigue and loss of elasticity.
3. The pressure calibration value drifts after long-term use.

Quick Fixes

1. Disassemble the safety valve and wash internal dust with clean compressed air, lubricate the spring with anti-rust grease.
2. If the spring loses elasticity, replace the spare safety valve stored in the vehicle immediately.
3. Send the valve to a professional service station for pressure calibration every 3 months.

7. Manhole & Discharge Port Sealing Gasket Leakage

Failure Causes

1. Rubber gaskets age and harden after long-term exposure to cement dust and high temperature.
2. Uneven locking force leads to partial gaps between the cover and tank mouth.
3. Hard cement particles are sandwiched between the gasket and flange surface.

Quick Fixes

1. Clean all cement residues on the flange surface before closing the cover.
2. Replace aging cracked rubber gaskets with spare parts carried on the trailer.
3. Tighten lock bolts diagonally and evenly to ensure full contact of the sealing surface.

Secondary Hazards of Delayed Troubleshooting

1. Slow unloading increases waiting time at construction sites, reducing daily delivery volume and revenue.
2. Excessive powder residue causes direct cargo loss and profit shrinkage.
3. Unmaintained compressors are prone to cylinder burnout, requiring expensive full replacement.
4. Tank rust holes lead to powder leakage on the road, triggering environmental fines and material waste.
5. Stuck safety valves may cause tank overpressure deformation, bringing major explosion safety risks.

LUCKSUN Daily Preventive Suggestions to Reduce Failures

1. Complete full tank cleaning after each delivery to avoid cement caking inside the cabin.
2. Inspect compressors, pipelines and sealing gaskets during pre-trip daily checks.
3. Store universal spare parts (breathable cloth, gaskets, air filters, safety valves) on every tanker for emergency replacement.
4. Carry out comprehensive maintenance of the whole pneumatic system every half month, especially for fleets working in high-dust construction zones.

Final Conclusion

luoxiang

Luoxiang is a professional semi-trailer manufacturer boasting the largest single factory workshop and production line in China, with immense production capacity. The company has over a decade of experience in customizing and manufacturing semi-trailers.

www.lucksuntrailer.com