News - Common Sweeper Washer Issues & Quick Fix Guide

In sanitation operations, Sweeper washer serve as the "main force" for road cleanliness, and their efficient operation is essential to maintaining a tidy urban environment. However, after long-term work under complex road conditions and high-intensity operations, sweepers inevitably encounter various minor malfunctions. If these issues are not promptly identified and addressed, they can not only reduce operational efficiency but also escalate into more serious faults, increasing maintenance costs. Therefore, as a reliable assistant in urban maintenance, ensuring the stable operation of street sweepers is crucial. Understanding and mastering common faults and their troubleshooting methods is key to ensuring their efficient performance.

I.Hydraulic System Fault

The hydraulic system, often regarded as the "heart" of a street sweeper, directly affects the overall vehicle performance.
One of the more common faults is oil leakage, which is usually caused by loose fittings, aging seals, or damage to the oil tank pipelines. Upon detecting a leak, fittings should be tightened immediately, aged seals replaced, and any damaged oil tank pipelines promptly repaired or replaced to ensure the hydraulic system remains properly sealed.

Abnormal working pressure is another common issue in the hydraulic system.
Insufficient or no pressure may result from improper adjustment of the solenoid relief valve, low oil levels, or faults in the electronic control circuits. In such cases, the relief valve pressure should be adjusted, hydraulic oil checked and replenished, filters cleaned, and electronic control circuits inspected and repaired to ensure stable hydraulic system pressure.

Hydraulic system overheating should also not be overlooked.
Low oil levels, degraded oil quality, improper relief valve pressure, or excessive motor speed can all be contributing factors. Therefore, regularly checking the oil level and quality, and adjusting the relief valve pressure and motor speed, are effective measures to prevent hydraulic system overheating.

II.Operating System and Daily Maintenance

During street sweeping operations, poor cleaning performance is a common issue for operators.
Factors such as improperly adjusted spray boom angles, blocked suction ducts, air leaks in the suction system, or worn brushes can all affect cleaning effectiveness. Regularly checking and adjusting the spray boom angles, cleaning the suction ducts, repairing any air leaks, and replacing worn brushes are necessary to ensure optimal sweeping performance.

Malfunctions such as garbage hopper tipping or returning failures, and sweeping disc extension, retraction, or lift control failures, are also common issues in street sweepers.
These faults may be caused by sticking solenoid directional valves, excessively low relief valve pressure, poor contact in electronic control circuits, or failed proximity switches. Regular checks and maintenance should include manually moving the solenoid valve core to eliminate sticking, adjusting the relief valve pressure, repairing electronic control circuits, and replacing failed proximity switches to ensure responsive and reliable control.

In addition, low or non-rotating sweeping discs may result from low relief valve pressure, excessively small throttle valve openings, or hydraulic motor faults. Relief valve pressure should be adjusted, throttle valve openings increased, and hydraulic motors inspected or replaced as necessary to ensure proper disc rotation.

III.Summary

1. Before Daily Operation
Check coolant, hydraulic oil, and lubricating oil levels; clean debris from the suction inlet, sweeping disc, and water inlet filters; inspect pipelines and fittings for looseness or leaks.

2. After daily work:
Clean the surface and interior of the sweeper, rinse the suction and sweeping discs; empty the dirty water tank and close all valves; check the operating status of the motor, water pump, and vacuum pump.