The reasons for a decrease in the range of fire truck water guns and water cannons are often related to equipment operation, maintenance, and mechanical failures. Below are some common causes and their solutions:
- Fire Pump Valve Not Fully Open:
If the fire pump valve is not opened correctly, water inside the tank may partially circulate within the pump body and only a portion will be discharged through the cannon, resulting in a reduced range. The valve should be rechecked and operated to ensure it is fully opened. - Abnormal Operation of the Power Take-Off (PTO):
Check the operation of the PTO and the driveshaft. If the PTO produces unusual sounds or operates abnormally, it may affect water delivery, leading to a decreased range. In this case, the PTO needs to be repaired or replaced. - Blockage Inside the Tank:
Clogged filters at the inlet and outlet of the tank can reduce the water flow entering the pump, thus affecting the range. It is recommended to drain the tank completely, releasing any remaining water through the fire pump’s suction port, and check for any blockages in the filters. If they are clogged, they should be cleaned promptly. - Fire Pump Malfunction:
If the fire pump’s self-suction function is abnormal (e.g., extended suction time or inability to suction water), it may indicate damage to the pump impeller or internal issues. Inspect the impeller by removing the suction inlet to determine if repairs or replacements are necessary. - Damage or Blockage in the Water Cannon or Water Gun:
If the water cannon itself has mechanical damage or internal blockages, the spraying effect will be compromised. In such cases, the water cannon should be repaired or replaced.
Summary:
Regularly inspecting and maintaining key components of the fire truck is essential to ensure its range remains optimal. If a decrease in range is detected, systematically check each of the above aspects to identify and address the issue promptly. This will help maintain the fire equipment in peak working condition for responding to emergencies such as fires.