|Cleaned by Pete's belt driven pump, twin belts transfer power form the motor to the pump this is a 5 gpm @ 2500 psi with a 13 hp Honda engine.|
|You can see the pump and the belt and pulleys that drive it in this picture.|
|Gear driven Hypro pump the small transmission reduces the speed of this 15 hp engine to around half to power the 4 gpm @ 3200 psi pump.|
|The belts and pulleys are replaced by this gear reduction or gear box transmission Cleaned by Pete's gear driven pump.|
The Direct Drive Pumps
Direct drive pumps work in the same manner but turn or spin at the same speed of the engine or motor driving them. Since they spin at 3400 RPM to 3600 RPMs they wear out quicker and have smaller pistons most direct drive pumps don't have large volumes of water. They can draw some water but it is not advised to use them in that matter. Gravity feed if set up correctly will work but most have to be force fed from a water tap or some type or other pumping devise. I have used a sump pump to supply water to them, they will need the supply of water to match their outputs if you are putting out 4 GPM you need 4 gallons per minute going in. The direct drive pump is found on most consumer grade systems.
|A direct drive nickle plate pump putting out 4 gpm @ 4000 psi driven by a Lifan 15 hp engine.|
|A direct drive nickle pump putting out 3.5 gpm @ 2700 psi driven by a Mitsubishi 7 hp engine.|
|Direct drive General pump 4 gpm @ 4000 psi powered by a 15 hp Lifan engine.|
|You can see in this picture the direct drive housing that protects and connects the motor to the pump. Cleaned by Pete portable heated unit photo.|
The direct drive pump can also be found to attach to an electric motor. Most electric motors run around 1750 RPM some run at 3400 RPM your pump must be attached and mounted to the correct size motor. Electric motors are rated still in horse power but they are classed differently than a gas motor. Torque produced in an electric motor is constant unlike a gas motor. Electric motors start and run constant even under load gas motors have governors that speed up or throttle down the engine under load to keep it constant. You can find belt driven electric power washing units also and they will have a longer life as it gas breathers do.
|C frame pump mounted directly to a 1 1/2 hp electric motor.|
|An electric kitchen cleaning unit capable of running hot water from the kitchen boiler or hot water heater do to its special packings.|
|This is an old "barrel pump" set-up the direct drive pump is a Hypro twin cylinder that was the standard for carwashes in the old days.|
|This is a 3600 RPM C frame pump for an electric motor only via a special adaptor it is mounted to a 6 hp gas engine. A Cleaned by Pete special build.|
|A closer view of a "C" frame pump designed to work with and bolt on to electric motors with a "C" plate face.|
This is just some highlights on driving a power washer picking which way you need will boil down to what you are looking to do with it. You need to decide on a few things cost, life, style, footprint, what will power it, are just some of the questions that should be addressed before you purchase a washer. For Cleaned by Pete and what we do we have several different washers and use several types of drives depending on what the job requires. The question is always is my motor big to run this pump. Pumps require a certain horse power and speed and much be matched to the motor or engine. You can always use a bigger motor or engine with no problems but to big of pump will not work out.