What hose for pto pump wet lines?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Jun 10, 2021.

  1. mile marker 27

    mile marker 27 Medium Load Member

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    I’ve had several folks say different things, about what thickness of hose to use for the supply, return and pressure hoses. I know the pressure hose, which goes to the dump trailer has to be a very high pressure hose but can the supply and return lines, just be normal suction hose? The pump I’m currently putting on is a dual line, whereas my other truck just has a single line from the tank.
     
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  3. Dino soar

    Dino soar Road Train Member

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    If you have a good hydraulic shop near you that has been in business for many years they will know.

    Just know what the pressures are for the lines you need made.

    If that shop has been around for a while I'm sure they make all the lines for all the trucking companies around you that put wet kits on and replace hoses, etcetera.

    Those guys know a lot about pumps and pressures and suction and return... They will know what you need.
     
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  4. mile marker 27

    mile marker 27 Medium Load Member

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    I know the pressure hose, to the trailer, that I had made for my other truck, was as expensive as hell!
     
  5. Stray_Dog

    Stray_Dog Light Load Member

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    Exactly right.
     
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  6. mile marker 27

    mile marker 27 Medium Load Member

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    My supply and return lines didn’t use fittings. They used a hose barb fitting that screws into pump and tank, with hose clamps. The pressure line to the trailer has crimped fittings and I believe is a 3000psi hose. With dual lines allowing for faster flow back to the tank, upon lowering the trailer, I was suggested that suction hose would be fine.
     
  7. Stray_Dog

    Stray_Dog Light Load Member

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    Not sure what kinda trailer you're pulling, I assume maybe a walking floor, but my experience is with trailers with a product pump it's always good to use the high pressure lines for both supply and return.

    In the case of a trailer with a product pump, You never know when you might need to reverse the pump and unless you have a directional control valve built into your system, swapping the lines is the easiest way. It really kinda depends on your application, but I do agree that using pressure hose for supply and return from the the truck to the trailer makes more sense as its more durable and stronger hose.
     
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  8. mile marker 27

    mile marker 27 Medium Load Member

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    35’ frameless end dump.
     
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  9. Stray_Dog

    Stray_Dog Light Load Member

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    I may have misunderstood you, but you say you're putting on a dual line wetkit?
     
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  10. mile marker 27

    mile marker 27 Medium Load Member

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    I am. When I say dual line, I mean two lines between the tank and pump but only one line with pressure going out to the cylinder to raise the trailer. I’m sorry but my terminology may not be correct.
     
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  11. mile marker 27

    mile marker 27 Medium Load Member

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    There’s only 1 line to the trailer.
     
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