Perform regular refueling to ensure the pump head operates smoothly.
The pump heads of high-pressure cleaning machines are typically equipped with 30# engine oil. The specific type of oil to be used should be chosen based on the equipment’s model and manufacturer’s recommendations. The crankcase of most standard household or commercial high-pressure cleaning machine pump heads is lubricated with mechanical lubricants, while some specialized models may use gear oil or hydraulic oil.
Common oil product options.
Oil No. 30: This is the most commonly used lubricant for the water pump of high-pressure cleaning machines. Its dynamic viscosity at 50°C is 27 to 33 mm²/s, its freezing point is -10°C, its flash point is 180°C, and it provides stable lubrication.
Engine lubricants: These include gasoline engine oil and diesel engine oil, and are suitable for cleaning machines powered by gasoline or d
iesel. They serve functions such as lubrication, cooling, and rust prevention.
Special lubricants: Some equipment is recommended to use the original engine oil or motorcycle 4-stroke oil. It should be filled up to the fill line.
Special circumstances and precautions.
Special model variations: Certain specific models (e.g., the 55-type pump head) can be equipped with gear oil. High-pressure water pumps with pressures exceeding 30 kilograms may require specialized hydraulic oil or heavy-duty engine oil (viscosity 46-68).
Refer to the manufacturer’s recommendations: Different brands and models of equipment have varying requirements. Always consult the equipment’s user manual or contact the manufacturer before refueling to avoid mistakenly adding the wrong type of fuel, which could cause damage.
Maintenance cycle: The oil in the new machine should be replaced after approximately 1 month of use or around 200 hours of operation. If the oil turns white, it should be replaced immediately to ensure the longevity of the pump head.
The operation of the pump head of a high pressure cleaning machine to add oil needs to be carried out according to the type of equipment and the manufacturer's instructions. The following are common steps and considerations collated by comprehensive authoritative public information:
Steps to Add Oil
Power out and prepare tools
Make sure the cleaning machine is turned off and disconnected to avoid accidental start-up during operation.
Prepare a suitable type of oil, a clean cloth, a funnel (optional) and a filling container (if you need to discharge old oil).
Confirm the oil type
Most high pressure washing machine pump recommended to use 30 # oil (kinematic viscosity 27-33 mm2 / s, flash point ≥ 180C)
If the engine is powered by a gasoline engine, gasoline may be used; Diesel models use diesel oil.
Some type 55 pumpheads may be suitable for gear oil, but this must be confirmed by reference to the instruction manual
Find the filling mouth
The filling mouth is usually located in the center shaft box of the pump head or on the bottom / side of the machine. The exact location varies by brand. It is recommended to consult the instruction manual
Emissions of old oil (e.g. replacement)
For the first replacement or regular maintenance, first twist the oil screw to remove the old oil, clean the oil before adding the new oil.
Apply new oil slowly
Pour the oil slowly along the filling mouth to avoid spillage.
The liquid level should be observed during injection and usually maintained between the upper and lower scales of the oil gauge
Inspections and test operations
After the filling is complete, start the machine to run for a short time to check whether there is oil leakage and whether the operation is normal.
Reconfirm oil levels after downtime and adjust if necessary.
Note
It is strictly forbidden to mix different types of oil to avoid affecting the lubrication effect or damaging the seal.
Do not add diesel: diesel is a fuel and cannot be used to lubricate the pump head
Regular replacement cycle: generally replaces for the first time every 20-50 hours of use, and every 100 hours thereafter or as specified