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Info & Advice

Pressure washers have many moving parts that put considerable wear on internal materials.

There are three main parts of the jet washer.

Electric Motor/Engine
High-Pressure Pump
Boiler

A pressure washer pump will typically have three pistons made from Ceramic or Stainless steel.
As the pump pistons move out of sequence, the water is drawn from the water supply via the aid of water seals and pump valves.

In layman's terms, the pump draws water from a low-pressure source and forces the water out at higher pressure than the input.

In order for the operator to let go of the trigger, we use an unloader valve. This valve will divert the water back to the source or back to the low-pressure inlet of the pump. A pressure switch is optional integrated into the unloader valve.

The machine stops after a preset time. This preset time is set in the electrical box via timers or PLC.

The pipework will either go through a boiler or straight to the hand trigger and lance from the unloader valve.

A pressure washer lance nozzle is critical as it keeps a percentage of water back. A nozzle needs to be sized correctly using charts, according to the flow and pressure of the pump.

A badly worn lance jet will result in low working pressure.

Pressure washer nozzle are availble in 0,15,25,40 & 65 degrees

Hot Pressure Washer Boiler
The Solenoid valve gets a signal from the PCB control circuit .fuel is sent through piping to the boiler head and into a fuel nozzle. This nozzle will atomize the fuel at a preset pressure. A blower motor fan rotates and, in turn, mechanically drive the fuel pump.

For more information about servicing Cat Pump Seals - watch this video

How a Universal Delta fuel pump works

For Servicing Seals - Cat Pumps Model 3CP1120, 3CP1130, 3CP1140