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  1. #1
    Member
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    Jan 2007
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    31
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    Vermont

    Default Roller pump

    I just bought a 55 gal boom sprayer from TSC. They neglected to tell me that I had to buy the pump separately. I got a Hypro 6500 cast iron. When I got home the manual said not to use roundup or liquid fertilizers with the cast iron, but it does not explain why. Do I have to go back AGAIN and spend extra money for another pump?

  2. #2
    Platinum Member
    Join Date
    Jul 2000
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    951
    Location
    Sierra Foothills, Northern California
    Tractor
    Kubota B7300; JD LX233

    Default Re: Roller pump

    Roundup and most fertilizers react with the iron (or steel). The impellers on pumps that are designed for those chemicals are plastic (rubber). You'd probably be OK if you were diligent about cleaining the pump out real good after using chemicals, but to be safe you might want to return the pump you got and get one rated for chemical spraying.

  3. #3
    Gold Member
    Join Date
    Jun 2004
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    274
    Location
    Goodrich IL
    Tractor
    Branson 4720

    Default Re: Roller pump

    What I do is make sure to clean the tank and pump after each use.
    Then add some oil to the pump to keep it from rusting.
    A few ounces of oil and a few good spins has worked for me so far...
    Gene
    Branson 4720
    1953 Golden Jubilee

  4. #4
    Super Member Farmwithjunk's Avatar
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    Aug 2005
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    7,514
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    Mt Washington, Kentucky
    Tractor
    Where do I begin.....

    Default Re: Roller pump

    Quote Originally Posted by loopyl
    I just bought a 55 gal boom sprayer from TSC. They neglected to tell me that I had to buy the pump separately. I got a Hypro 6500 cast iron. When I got home the manual said not to use roundup or liquid fertilizers with the cast iron, but it does not explain why. Do I have to go back AGAIN and spend extra money for another pump?
    Round-Up (glyphosate) is a salt-based product. Enough said. Fertilizers (especially those high in nitrogen) are extremely corrosive. You CAN spray round-up with a cast pump, but IMMEDIATELY after you're finished, wash the pump with water and a product like Neutra-Sol (TSC sells a nuetralizer) then fill the pump with diesel fuel or a lightweight oil until next use. Corrosion will FINALLY get the pump anyway, but you can extend the life for years if you keep the pump washed out and oiled. I've got a cast pump (Hypro) that's been used exclusively with glyphosate or 2,4-D. It's about 15 years old, and still pumping fine.
    There are three kinds of men;
    1.) The ones that learn by reading
    2.) The few who learn by observation
    3.) The rest of them have to pee on the electric fence for themselves.

  5. #5
    Veteran Member lawn_king's Avatar
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    Jun 2006
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    Hanover massachusetts
    Tractor
    kubota L 3540 hsdc,B 2320 hsdc & lots of other stuff!

    Default Re: Roller pump

    Roundup can explode if mixed and used in a steele tank!

  6. #6
    Epic Contributor Bird's Avatar
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    Mar 2000
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    38,260
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    Texas

    Default Re: Roller pump

    I agree with the others; no problem as long as you thoroughly clean the pump after each use AND apply a lubricant. The only difference between what has been recommended and what I did was that I filled my pump after each use with regular old Prestone antifreeze instead of oil. When I wanted to use the pump, I poured out the antifreeze, used and cleaned the pump and put the antifreeze back in it. Even a pump thoroughly cleaned with water will rust and seize up if left with just air in it. You can then take it apart pretty easily though and clean it out. I had a glass bead blaster cabinet (like a sandblast cabinet) and had to work my pump over with that once.
    Bird

  7. #7
    Veteran Member Oleozz's Avatar
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    Jan 2006
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    1,559
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    Pa.
    Tractor
    International 1066 with Year Round Cab, Kioti DK 45S with Cab, 451 Loader

    Default Re: Roller pump

    Have you checked the difference in price between the cast-iron, Ni-Resist, or the SilverCast body and rotor?
    "Land management is an art that builds on history and is based in science." Herb Stoddard Sr.

  8. #8
    Member
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    Jan 2007
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    Vermont

    Default Re: Roller pump

    The other pumps are at least double the price.
    I was going to use antifreeze, keeping the pump and lines full, to also guard against freezing. Would I not use the oil in that case?

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