I’m just getting started in pressure washing and want to thank everyone that contributes here for the free education.
I’m looking at buying a used trailer with a Honda GX390 and Udor Rubiera 4/30 pump.
The way the trailer is set up he has the direct drive pump plumbed into the bottom of a 300 gal tank. I have enough experience with pumps and have read enough on this forum to be leery of this type of setup.
I need to get to the bottom of this ‘direct drive draw’ issue. People keep going back and forth about whether a 4/4k will safely draw from a water tank. When I get healed up I need to test mine, sure would be nice so I don’t have to hook up my 120v pump.
Your direct drive only takes in what is being delivered…it won’t suck in any water. A buffer tank should feed your direct drive pump enough flow no problem.
No, he’s not talking about the engine. He said you can’t convert the pump to a gear drive. You can bolt anything you want on the engine whether it’s a direct drive pump, gear driven pump, hydraulic pump for a wood splitter, etc.
I should say you can bolt on anything that uses the same shaft size.
A direct drive pump runs at the same speed at the engine.
The gearbox driven pump will run at half the speed a direct drive pump. (The engine stays the same RPM in both cases)
Here’s the thing - a pump designed for a gearbox (or belt) won’t work with a direct drive and the direct drive you have, won’t work via a gearbox. (It will run too slow).