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Jared Babik

Dramm Staff
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Posts: 12
Reply with quote  #1 
I was visiting with a grower last week who owns a SLVH Autofog. He had purchased the unit a few years prior and it worked great. This past season he was finding that the solution tank wasn't totally empty after each fog application.  We went through the machine and discovered that his suction tube was pretty clogged and limiting the amount of solution being taken up by the nozzle.
      First, lets remember that the Autofog discharges a specific amount of solution per minute.  It is not variable. You set your timer based on the specific rate of output of the nozzle.  Your SLVH has a output rate of 30 minutes per Liter.  The LVH is 20 minutes per Liter.  If there is a clog or if your machine is not calibrated, it will effect the output rate  of the unit and may result in leftover solution in the tank. Here are some tips if your in the same situation.

1.   Is your suction tube partially clogged? If the inside diameter of the tube is reduced   the nozzle won't pull the correct amount of solution.

2.  Is your suction tube strainer caked up at the bottom?  It sits in the chemical solution tank where your suction tube fits in.  If the bottom is caked up it will act like a dam and once the solution level falls below that line it won't let any more solution up.

3.  Is the chemical staying in solution?  If you find that the chemical is coming out of solution, which could happen with some older chemistries, simply dilute the solution and adjust the timer to run for the total amount in the solution thank.  This won't reduce the efficacy of the product, just take a little longer to get out. 

4.  Is your machine calibrated?  Your Autofog comes pre-calibrated from Dramm.  You should see two red lines or dots on the side of the nozzle head.  By twisting the nozzle cap you can change the output rate of the nozzle head.  Overtime, two O-rings inside the nozzle head wear. Along with the O-rings the inside of the nozzle can wear a little.  Each year you should purchase new O-rings..I"d buy a few sets.  They cost a few dollars.  Simply replace the O-rings and follow the re calibration procedure in your manual.  If you don't have a manual you can view and download it on our website.

5.  Are there any kinks or leaks in your compressor hose?  Reduced pressure to the nozzle will effect the rate of output of the nozzle head.  

6.  Also, it's a good idea to check the foam filter located underneath the front of the compressor.  On older models, you need to pull the red cover off to get to the foam filter.  This should be cleaned monthly and replaced if it's really caked up.  

Look for a upcoming post which will list the item #'s for these replacement parts.  Will also be offering a Autofog service kit which will include all these parts

Have a great day!

Jared

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