Damage to the water sprinkler truck’s pump can lead to poor suction performance, insufficient spraying pressure, air leakage, and other malfunctions. Users often instinctively attribute such issues to pump quality; however, the working principle of sprinkler truck pumps is based on mechanical sealing. After extended operation, routine maintenance and inspection of pump components are essential. Below is relevant information on sprinkler truck pumps provided by Hubei Chengli Special Vehicle Co., Ltd. for online users! **Leakage from Sprinkler Truck Pumps – Solutions to Pump Leakage** Master these four key points to resolve pump leakage issues permanently! 1. **Cracked Pump Housing** - For minor cracks, epoxy resin bonding is an effective repair method. - Excessive wear in the bearing housing bore can be restored via bushing insertion. - Pitting, grooves, or irregularities on the inner end face of the pump inlet chamber may be corrected by lathe turning. - Note: Cast iron pump housings cannot be reliably repaired by welding. - In cases of severe cracking or bursting, immediate replacement of the pump is mandatory to avoid operational disruption. 2. **Corroded Pump Shaft** - Surface pitting or depressions can be filled with tin plating, followed by precision turning to restore roundness. - Shaft wear can be remedied via chromium plating. - Bearings must rotate smoothly and silently. 3. **Worn or Degraded Water Seal** - Replace rubber water seals exhibiting aging, deformation, or physical damage. - Also replace seals whose springs have lost tension or suffered corrosion. 4. **Post-Repair Testing Procedure** - Manually rotate the V-belt pulley—no binding or resistance should occur. - Block the pump inlet port, then fill the impeller chamber with water. Rotate the pump shaft and inspect the observation port: no water leakage should be observed. - If binding or leakage persists, identify and rectify the root cause immediately. **Sprinkler Truck Pump Model Specifications** | Pump Model | Flow Rate (m³/h) | Flow Rate (L/min) | Head (m) | Input Shaft Speed (rpm) | Shaft Power (kW) | Self-Priming Height (m) | Self-Priming Time (min/5 m) | Input Shaft Rotation Direction | Weight (kg) | |--------------------|------------------|-------------------|----------|-------------------------|------------------|--------------------------|----------------------------|--------------------------------|-------------| | 80QZ-60/90 | 60 | 1000 | 90 | 1180 | 22.5 | 6.5 | 1.5 (4 m) | Clockwise/Counterclockwise | 86 | | 65QZ-40/50N(S) | 40 | 660 | 50 | 1450 | 9.25 | 6.5 | 1.0 | Clockwise/Counterclockwise | 56 | | 65QZ-50/110 | 50 | 833 | 110 | 1480 | 24 | 6.5 | 1.0 | Clockwise/Counterclockwise | 92 | Having understood the solutions for pump leakage, let’s now explore five systematic troubleshooting steps for “no-water-drawing” faults—brought to you by Hubei Chengli: 1. Check for air leaks in the sprinkler truck’s piping system. 2. Verify correct positioning of ball valves along the pipeline. 3. Confirm normal operation of both the pump and the power take-off (PTO). 4. Inspect the three-way filter screen for clogging caused by debris or sediment. 5. For first-time use, ensure sufficient priming water has been added to the pump. 6. During water suction, verify that the suction lift (i.e., suction pipe length) does not exceed 7 meters. This comprehensive guide—covering pump leakage remedies, “no-water-drawing” diagnostics, and detailed pump model specifications—was provided by Hubei Chen