Tow-behind Sprayer

Manual Online here and in DropBox.

  • Bought online 8/12/2019
  • Ironton M282790C.4
  • Item# 282790
  • Ship Weight 50.0 lbs
  • Tank Size (gal.) 13
  • Gallon marks molded into tank make it easy to monitor fluid levels
  • Tank has a 7 1/2 in. opening and an easy-empty bottom drain
  • 13-gallon tank is UV-resistant and compatible with virtually all pesticides
  • Lightweight 3/8 in. x 11 ft. clear PVC hose reinforced with braided synthetic cord for durability
  • Hose (in. x ft.) 3/8 x 11
  • Dimensions L x W x H (in.) 40 x 21 1/2 x 21 1/2

Winter 2020-21 the pump and spray wand froze. I could not find an Ironton replacement pump. Bought an 80 psi pump and extension wand. The pump fit the mounting holes well and sprayed ok. Had to recalibrate the discharge and did the following that worked well for the first time on 4/20/2021.

Calibration Plan of the sprayer that now has an 80-psi pump

Followed the advice here and the advice at where they calibrated a sprayer with the “1/128 method”. That method extrapolates the discharge based on 1/128 measurements and requires conversion from gallons per acre to ounces per 1000 SF. That extrapolation is unnecessary if the test area used is 1000 SF and the collection quantity is in ounces. Therefore, the following steps were taken.

  1. Tested the swath width for the 80 psi pump. The 40 psi pump provided a 40″ swath but the 80 psi pump provided an overall 72″ width with full coverage over a 60″ width. So, divide 1000 SF by the 5′ (60″) actual width. The travel distance to be timed will be 200 feet.
  2. As the sprayer only has one nozzle, measured the time it takes to drive across 1000 SF then measured the discharge for that time. The discharge is the volume to add the 1 oz. of WFZ so 1 oz. is applied to 1000 SF.
  3. With the throttle set at a marked RPM, measured travel time for a 5 ft. swath x 200 ft. travel; i.e. 1,000 SF. Repeated three times and each was 33 seconds. That will be the time to spray 1,000 SF.
  4. Then caught the discharge in a clean spray tank for 33 seconds and about 3/8 of a gallon was caught. Caught the discharge for a second 33 seconds and the level was up to 3/4 gallons. Therefore, the sprayer sprays 3/8 of a gallon in 33 seconds; i.e. the travel time to spray 1,000 SF.

Per the above, the Ironton Sprayer sprays 3/8 of a gallon in 33 seconds travel time, with JD Mower’s RPM set to the marked throttle position, to spray 1,000 SF.

  • So, to spray an acre; 43.560 KSF/acre at 3/8 gallon/KSF = 16.33 gallons needed. So, 13 gallons will spray 0.8 acres; i.e 13/16.33.
  • One gallon will spray; 1 divided by 3/8 = 2.6 KSF = 2,600 SF

Other helpful links found were:

Original Equipment Info that changed with the new pump and wand.

  • Pressure (PSI) 40
  • Flow (GPM) 1
  • Spray Pattern Cone, stream
  • Spray Height (ft.) 12
  • Spray Gun Type Spot, broadcast
  • Pump Type Ironton
  • Power Supply 12V
  • 1 GPM Ironton pump with durable chemical-resistant components
  • Spray gun nozzle adjusts from stream to cone
  • Stream has 12 foot vertical and 20 foot horizontal maximum spray distance
  • Now 60 in. effective broadcast width
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