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Qingdao Puhua Heavy Industry Mobile Pavement Shot Blasting Machine Maintenance Guide - Ensuring Long-Term and Efficient Road Construction

06 / Aug . 2025



Daily Maintenance: Double Ensuring Efficiency and Quality


Key Post-Work Operations


Steel Shot Circulation System Cleaning: After daily operation, open the recycling bin and remove steel bar debris and concrete slag (focus on cleaning the separator screen) to prevent blockages that affect shot blasting efficiency.


Blasting Head Chamber Inspection: Clean any remaining steel shot from the rebound area of the shot blasting wheel guard to prevent large particles from abrading the blades.


Travel System Management


Track Tensioning: Press the center of the track. If sag exceeds 40 mm, adjust the hydraulic tensioner.


Tire Pressure Calibration: Maintain an unladen tire pressure of 0.35 MPa. Check the suspension system if the ground is uneven.


Key Sealing Points


Check the integrity of the rubber sealing curtain in the shot blasting room daily. Replace any defects exceeding 10 cm immediately.


Use silicone seals on the dust collection system ductwork to prevent dust leakage.


Periodic Deep Maintenance Plan


Period Maintenance Item Technical Standard


Every 50 hours 1. Shot blasting wheel blade wear inspection. Replace any blades worn more than 3 mm on one side.


2. Pulse backflushing of dust filter cartridges Air pressure 0.6 MPa, single backflush ≤ 8 seconds

Monthly 1. Hydraulic system oil level check: If the oil level falls below the center line of the sight glass, refill with HV46 anti-wear hydraulic oil.

2. Travel reducer gear oil change: Initial maintenance after 200 hours, then every 500 hours thereafter.

Quarterly 1. Steel shot purity test: Thoroughly screen and replace if impurities exceed 15%.

2. Electronic control system insulation test: Motor insulation resistance ≥ 2 megohms.


/Frequency Troubleshooting Solutions/


Problem 1: Roughness not meeting standards

Cause: Insufficient steel shot flow or excessive travel speed

Troubleshooting steps:

Check the shot blaster flow valve opening (standard opening ≥ 70%)

Reduce travel speed to below 1.5 m/min

Problem 2: Decreased recovery rate

Cause: Insufficient dust collection air volume or seal failure

Solution:

Clean the dust filter cartridge and check the fan belt tension.

Replace damaged recovery bin rubber baffles


/Specialized Maintenance Services/


/Customized Solutions for Harsh Operating Conditions


For coastal high-salt environments: Stainless steel shot blasting blades and special anti-rust grease packages are provided.

For extremely cold regions: An oil preheating device is installed on the hydraulic system.


/Quick Response Mechanism


32 service stations nationwide are equipped with dedicated road-use engineering vehicles, providing 24-hour on-site service.


15 core components, including track assemblies and hydraulic valve blocks, are always available.


/Intelligent Monitoring System


Optional GNSS Positioning Module: Real-time monitoring of equipment trajectory and shot blasting coverage.


/Core Value of the Equipment


Construction Quality Assurance: Shot blasting depth of 0.3-0.6 mm (compliant with JT/T 1363-2020 standard)


Life-Extending Technology: The shot blasting wheels utilize a tungsten carbide coating, achieving a wear life of up to 1,200 hours.