Operator errors that cost you money
All pressure washers are high-maintenance machines. High-pressure water will eventually wear out seals, O-rings, springs, and other parts, so to replace seals, valves, and O-rings as well as change the oil as part of routine maintenance will prolong the life of the unit. However, the most common cause of excessive maintenance cost is operator error.
Cause 1. Running the pressure washer without water
Normally this will destroy the pressure water pump within minutes, so always check the water source before run the machine.
Cause 2. Running the pressure washer in extended by-pass
By-pass is when the pressure washer is on, and the trigger is of the water is re-circulating inside the pump manifold, the water temperature builds as time goes on. It is now allow to let the unit run in by-pass for more than five minutes . This is because the heat buildup quickly damages the pump. Therefore, you have to turn off the pressure washer every time you are not going to be spraying, even for some unit that installed with a thermal relief valve that will release the hot water and the pump be feed with cold water to cooling down.
Cause 3. Cavitation
Cavitation is caused by air getting into your pump. The air can damage your pump as it rapidly expands and contracts. The first sign of cavitation is loss of pressure and a hammering noise. The cause of cavitation is lack of water or air getting into the system. For example, your pressure washer is rated for 4.0GPM but the inlet hose only provides 3 GPM, then the pressure washer pump will still try to pumping 4.0 GPM. The suction due to the lack of water will pull in air and cause cavitation. The only solution to cavitation is to feed your pump the required amount of water and to make sure there are no leaks in the water inlet system.
Cause 4. Freezing
In the winter the water left in the pump after use will freeze and possibility of damage to the pump. The typical remedy for this is putting anti-freeze in the pump. So always keep the pump run for a extra seconds and pump out the excess water.
Cause 5. No lubrication and lack of lubrication
High-pressure pumps, like gasoline engines, require oil to lubricate transmission mechanism, the crankshaft, connecting rod and plungers. The oil is needed to keep the pump parts cool and turning freely. No oil and low oil will causes permanent damage to the pump. When the oil leak out, or water gets into the pump oil, the pump parts will overheat and begin to break apart. Always check your oil level and maintain the correct amount and type of oil in the pump to prevent damage.