How to conduct daily inspections and maintenance of gasoline water pumps

The daily inspection and maintenance of gasoline water pumps should focus on lubrication, cleaning, operation norms and storage protection. The following are the specific steps and precautions:

I. Daily Inspection

Pre-startup inspection

Engine oil level: Ensure that the oil quantity is within the range marked on the dipstick. Insufficient oil can lead to inadequate lubrication, while excessive oil may cause oil leakage.

Fuel level: Check if the fuel in the fuel tank is sufficient to prevent the machine from stopping due to lack of fuel during operation.

Air filter element: Check if the filter element is clogged or dusty. Clean or replace it if necessary.

Pre-filling water: Before starting, it is necessary to fill the pump with pre-filling water to prevent the pump from idling and causing damage to the sealing ring.

Inlet and outlet water pipes: Check whether the connection between the suction pipe and the outlet pipe is firm to avoid air or water leakage.

Inlet filter screen: Ensure that the filter screen is free from debris blockage to prevent large particles from being sucked in and damaging the water pump.

In-operation monitoring

Water temperature and oil pressure: Observe the water temperature gauge and oil pressure gauge to ensure they are within the normal range (such as the water temperature not exceeding 90℃).

Abnormal noise and vibration: If the water pump emits abnormal noise or the vibration intensifies, it may be due to the impeller being stuck or the bearing being damaged. The machine should be stopped immediately for inspection.

Water outlet pressure: Check if the pressure at the water outlet is stable. If the pressure is insufficient, it may be due to worn impellers or clogged pipes.

Inspection after shutdown

Drain plug: After the machine stops, unscrew the drain plug to drain all the accumulated water in the pump body to prevent cracking due to freezing in winter.

Water accumulation in the inlet pipe: Pull the rope to push open the valve core of the bottom valve and drain all the water in the inlet pipe.

Appearance cleaning: Remove dust and debris from the surface of the water pump to ensure good heat dissipation.

Ii. Regular maintenance

Engine oil change

Change: Change the engine oil after one month of use or 20 hours of operation.

Subsequent replacement: Replace every 6 months or after 300 hours of operation. 4-stroke motorcycle oil is sufficient.

Note: The amount of engine oil should be moderate (about 60 milliliters). Too much or too little will affect the engine's lifespan.

Air filter maintenance

Cleaning: Clean the filter element with a non-flammable solution, let it dry, then immerse it in clean engine oil, squeeze out the excess oil and reinstall it.

Replacement cycle: Clean once every 3 months or after 50 hours of operation. In harsh environments, the cycle should be shortened.

Spark plug maintenance

Inspection: Visually inspect whether the spark plugs are worn or the insulating rings are cracked, and measure the gap with a plug gauge (the standard is 0.70-0.80mm).

Cleaning: If the carbon deposit is severe, take it out, scrape off the carbon deposit with a knife, adjust the gap and then reinstall it.

Replacement: If the spark plug is damaged, a new part needs to be replaced.

Maintenance of fuel valves and mufflers

Fuel valve cleaning: Clean once every 3 months or after 100 hours of operation to prevent blockage.

Muffler mesh cover: Clean it once every 12 months or after 300 hours of operation to keep the exhaust unobstructed.

Cylinder pressure detection

Inspection cycle: Check the cylinder pressure every 6 months or after 200 hours of operation to ensure normal engine compression.

Abnormal handling: If the cylinder pressure is insufficient, it may be due to worn piston rings or poor valve sealing. Disassembly and inspection are required.

Iii. Operating Specifications

Startup and shutdown

Start: Turn on the fuel switch, open the accelerator to half, close the choke, pull the start handle until you feel resistance, and then pull it quickly.

To stop the machine: Move the throttle lever to the fully open position, turn off the engine switch and fuel switch, and avoid direct shutdown at high speeds.

Operational requirements

Medium throttle operation: Avoid long-term operation with a low throttle to prevent poor engine lubrication.

When working in areas with insufficient water sources, a dedicated person is required to supervise. The machine should be shut down for inspection after continuous operation for 3 hours.

Do not pump flammable or corrosive liquids (such as gasoline, acid, etc.) to prevent fire or equipment damage.

Iv. Storage Protection

Before long-term discontinuation

Carburetor treatment: Close the oil inlet valve of the carburetor and let the engine shut off automatically to prevent the oxidation of gasoline in the carburetor.

Pump body cleaning: Fill the inlet pipe with clean water to clean the impeller chamber until all the sediment is discharged.

Fuel storage: Drain the remaining fuel in the fuel tank and store it properly in a dedicated container.

Storage environment

Location selection: Store in a cool, well-ventilated and dry place, away from fire sources and flammable materials.

Dust-proof protection: Wrap the water inlet and outlet with cloth or flexible paper to prevent debris from entering.