Specing out parts for a vac pump/vac trailer setup.

Keep in mind that the supply store needs to get rid of the inventory on the shelf. Don't know whether you saw the guy who started a thread lately about being tricked into buying a junky blower for his pneumatic but it happens.
Calling several big established supply outfits and taking notes and cross shopping any expensive purchase like that would be in your best interest.

 

If there's a reasonable doubt about what size will get the job done right, go with the bigger one. You probably know that but just a reminder. Best wishes on your venture.

 

What I am running is matching 30gpm hydraulic motors for my challenger 608. One thing you need to do is run a larger return line to feed the pto as it will probably starve if using the same size lines as the pressure side. For cfm I'd say get close to 400 and above, this is going to help with unload/load time.

Best to call chelsea or whatever pto you are going to run and make sure you get the right pto for your tranny that will get the right ratio to spin the vac pump to the desired speed. Its not just bolt up any pto and go as I thought.You just have to find out the optimal speed of the pump and then get the correct pto that will generate that speed with your transmission ratio.

Also you might look into a pressure relief valve. This will save your setup and dump fluid back into the tank if you have a malfunction. Dont forget about a inline filter.

On my setup I have 50 gal of fluid in a 65 gal tank and most of the time it doesn't get too hot unless its running for long period, but for 20 min to load/unload its fine.

Also, I had best luck with yellow teflon tape for my fittings. That liquid pipe thread sealer just leaked from the start.

I will say go with name brand on pto. I have a cheaper world american brand and it fails to disengage sometimes and is just a PITA, spend the extra and get the good one.

 

I worked for a clean up company and the tractors set up with 'power down' wet lines worked to run a trailer mounted hydraulic driven vac pump except the driver had to pull the throttle all the way out. A faster PTO was clearly needed. Don't know if it was ever done as I moved on.