CHAPIN 61900 4 Gallon Tree and Turf Pro Commercial Backpack Sprayer User Manual

CHAPIN 61900 4 Gallon Tree and Turf Pro Commercial Backpack Sprayer

WARNING!

• IMPROPER USE OR FAILURE TO FOLLOW INSTRUCTIONS CAN RESULT IN PRODUCT FAILURE OR INJURIES.
• FOR THE SAFE USE OF THIS PRODUCT YOU MUST READ AND FOLLOW ALL INSTRUCTIONS BEFORE USING.
• WARNING: Handling the brass parts of this product will expose you to lead, a chemical known to the State of California to cause birth defects and other reproductive harm.
• Wash hands after handling.

CAUTION RULES FOR SAFE OPERATION

• Before assembling and operating your Chapin sprayer, read all instructions thoroughly.
• When working with equipment under pressure, safety precautions must always be carefully observed, including the following:
• NEVER spray flammable materials or pressure and gas-producing chemicals.
• ALWAYS read the chemical label before filling the sprayer as some chemicals may be hazardous when used with this sprayer.
• ALWAYS wear goggles, gloves, a long-sleeve shirt, long pants, and full foot protection when spraying. Work in a ventilated area or outdoors.
• PRE-USE CHECK: Before each use check the tightness of the hose nut to be sure the hose is securely attached to the shut-off assembly.
• Ensure the hose is securely attached to the tank by tightening the hose clamp if necessary.
• Ensure that all nozzle and wand connections are tight.
• DO NOT leave a pressurized sprayer in the hot sun or anywhere near a heat source.
• Heat can cause pressure to build up causing the sprayer to ignite or explode resulting in injury or death.
• NEVER pressurize the sprayer by any means other than the original pump. Over-pressurizing can cause the sprayer to explode resulting in injury or death.
• DO NOT attempt to modify or repair this product except with the original manufacturer’s parts.
• NOTE: The tank and hose may have residual water in them due to quality testing performed on the sprayer.

APPLICATIONS & USE FOR YOUR CHAPIN SPRAYER

• Avoid using a sprayer for general cleaning purposes if plant protection or herbicide chemicals have already been used in the sprayer. If a sprayer has been used for plant protection or as an herbicide, clean the sprayer completely (see page 5) before using it.
• Plant Food: Use different spray patterns for optimum foliage feeding or fungicide and pesticide application.
• Herbicides: Reduce weeds and unwanted plants but avoid using the same sprayer for plant feeding or protection without thoroughly cleaning (see page 5) the sprayer first.
• General Household Use: Apply detergents, vinegar, cleaning solutions, warm water (not exceeding 120°F/49°C), or nontoxic household cleaning chemicals for carpets, floors, walls, glass, countertops, and ceilings.
• DO NOT use a sprayer that has been used with herbicides, pesticides, or other toxic chemicals for household applications.
• General Outdoor Use: Use the sprayer for cleaning windows or with a detergent for general-purpose cleaning.
• Other applications include wood preservatives, waxes, waterproofing, and diluted household bleach (max. 1 part household bleach to 9 parts water solution).

SPRAYER COMPONENTS & USE INFORMATION

CF VALVE™ ASSEMBLY

• Assemble the nozzle gasket to the inlet side of CF ValveT™ and screw it onto the end of the elbow. Place the fan nozzle tip into the retaining nut and then place the nozzle gasket on the fan nozzle tip flange.
• Screw this assembly onto the outlet side of the CF Valve™. To uninstall the CF Valve™, reverse the above instructions.
• The CF Valve™ is intended to be used with a fixed nozzle. The Fan nozzle tip provided is rated @ .4 GPM @ 40psi.

NOZZLE ASSEMBLY Figure 1-2

• Unscrew the nozzle cap (1) from the nozzle body (3) with the retaining nut (2) fastened tightly to the elbow (5). Unscrew the retaining nut (2). Push the nozzle body (3) with the nozzle gasket (4) out of the retaining nut (2).
• To reinstall the nozzle, reverse the above instructions.

Figure 3

• Unscrew the retaining nut from the elbow and push the fan nozzle tip and gasket out of the retaining nut. To reinstall the nozzle, reverse the above instructions.

WAND ASSEMBLY

1. Make sure the o-ring is installed on the end of the wand Insert the wand into the shut-off valve.
2. Turn and tighten the screw cap clockwise onto the shut-off valve.

INSTALLING THE PUMP HANDLE

• The sprayer includes all hardware necessary for installing the pump handle. The pump handle can be mounted on either end of the shaft (A).
• To install the pump handle place the handle (C) over the shaft (A) aligning the pump handle hole and shaft hole.
• Push the straight side of the cotter pin (B) through the aligned hole as shown in Figures 1 through 3.

INSTALLING THE SHOULDER STRAP

• The top of the shoulder straps are attached to the tank.
• Attach the lower end of the straps by clipping the strap hooks to the metal frame between where the frame exits the tank and curves around.

WAND CLIP

• The wand can be attached to the metal frame using the wand clips.

PRESSURE REGULATOR

• The spray tank and the pressure cylinder are separate compartments in the sprayer. Pressure is maintained in a separate pressure cylinder within the unit and is built to withstand normal operating pressure.
• The Chapin backpack sprayer has a built-in, adjustable regulator to control spray pressure. If required adjust the regulator before filling the sprayer tank.
• To adjust, first remove the tank cap and filter basket. Look into the tank to view the top of the regulator.
• There are four “fingers” on the regulator’s knob.
• The fingers are numbered 1, 2, 3, and 4. Finger 1=15 psi, Finger 2=30 psi, Finger 3=45 psi, and Finger 4=60 psi.
• The higher you set the pressure, the more liquid will exit the sprayer in a given amount of time.
• Note: the higher the pressure is set, the smaller the droplets. Therefore, there will be more “drift” in the expelled liquid at higher pressures.
• When changing the spray pressure, excess pressure in the pressure cylinder must be released into the tank through the spray wand.
• To adjust, push down the regulator knob and rotate it to align with the alignment pin to the desired number.

STAGE FILTERING SYSTEM

• This backpack sprayer is equipped with a 4 stage filtering system (see Figure 1).
• Stage 1 is a filter basket incorporated into the tank opening where fluid is added. Stage 2 and 3 filters are located at the inlet of the pressure cylinder.
• Stage 2 is a removable In-Tank filter. Stage 3 is a removable filter cartridge integrated into the pressure cylinder. Stage 4 is a removable filter incorporated into the shut-off assembly.
• Periodic cleaning of these filters is recommended to ensure consistent fluid flow through the sprayer. This will also reduce sprayer component wear.
• Stage 3 filter cartridge cleaning requires the removal of the entire pressure cylinder assembly (see section “disassembling and repairing the pressure cylinder”).
• Once the pressure cylinder is removed the stage 3 filter can be removed for cleaning (see Figure 3). Periodic cleaning of the stage 2 filter is highly recommended and will reduce the need to perform this disassembly.
• It is best to have no or minimal fluid in the tank before removing and reinstalling the stage 2 In-Tank filter. The In-Tank filter needs to be oriented in a specific way when inserted into the pressure cylinder base (see Figure 2).
• The stage 4 filter is a removable filter incorporated into the inlet side of the shut-off valve (see section “Disassembling and repairing the shut-off valve”).
• Make sure pressure is released before detaching the hose from the shut-off. It is best to have no or minimal fluid in the pressure cylinder before removing and reinstalling the stage 4 shut-off filter as fluid can leak from the hose.

FILLING THE SPRAYER

• Make sure the filter basket is in place to keep debris from entering the sprayer.
• Determine the amount of water needed for your application, by checking the chemical label for the proper ratio of chemical to the amount of water you want to spray for this job.
• Add the proper amount of chemicals to the sprayer, and then pour the measured amount of water through the basket filter in your sprayer. Stir the mixture in the tank with a clean utensil (like a paint stirrer).
• The sprayer will hold the 4-gallon (15.0L) capacity plus the chemical.
• It is not necessary to fill the sprayer tank with each use. You can fill the tank with only the amount needed for each application.
• Always follow the manufacturer’s instructions included on their product label.

HELPFUL SPRAYING INFORMATION

• Use RAPID pump strokes to prime the pump. You will know the pressure cylinder is filling with liquid when you feel firm resistance from the pump.
• The air in the pressure cylinder is compressed from repeated strokes. By pressing the hand lever on the shut-off, the valve opens.
• The hand lever valve has a retaining clip to keep the valve in the “OPEN” position for continuous spraying if desired. For easy pump action use the END of the pump handle.
• The amount of liquid delivered during spraying depends on the pressure set on the pressure regulator and the rate of pump stroke.
• Note: If you experience a rapid pressure drop, drain the sprayer completely and pump the handle with an empty tank.
• The pressure cylinder will fill with the required volume of air to repressurize. Chapin advises performing this procedure from time to time as routine maintenance.

POWDER-BASED CHEMICALS

• Powder-based chemicals (powder mixed with liquids to make the spraying agent) are usually abrasive and can cause wear.
• When you use a powder-based chemical in your sprayer, make sure it is thoroughly dissolved in the liquid solution.
• Thoroughly clean and flush the sprayer with water to extend the life of the sprayer’s parts.

CLEANING

1. Always empty the sprayer and clean the tank thoroughly after each use.
2. Pump the sprayer handle until all of the contents and air exit through the nozzle.
3. Fill the tank halfway with water and pump the water out as explained in step 2 (repeat several times as necessary).

Other Cleaning Hints:

• • Improper spray distribution usually means the nozzle is clogged, remove the nozzle and clean it.
• • Soap can be added to the water to clean the tank.
• • Do not use strong cleaning agents or abrasives.
• • If you use a chemical agent to clean the tank follow the manufacturer’s recommendations for the disposal of the waste water.
• • Follow the chemical manufacturer’s instructions for clean-up.

STORING / MAINTAINING YOUR SPRAYER

• The sprayer should be stored out of direct sunlight in a cool dry space.
• Before freezing weather make sure to drain all liquid in the tank, pump, pressure cylinder, hose, shut-off valve, wand, and nozzle, to avoid liquid expansion and cracking in the sprayer components (See “Cleaning” section).
• Lock the shut-off valve in the “open” position.
• When service is required call your nearest Chapin dealer and always insist on original Chapin manufactured replacement parts.
• Inspect the hose, wand, pump, tank, and shut-off valve regularly for wear, damage, or leaks and repair defects promptly.

TROUBLESHOOTING YOUR SPRAYER

DISASSEMBLING AND REPAIRING THE PISTON PUMP

1. Remove the cotter pin and pump handle. With the pump facing towards you lay the unit on its back (Figure 1). Loosen the hose clamp and remove the sprayer hose.

   • Caution: There could be residual liquid in the hose and pressure cylinder. Remove the nut and bolt from the protective cap and remove the cap (ref: figure 9).
   • Rotate the pump shaft to reach two lever bolts(A). Using an allen wrench, remove the lever bolts. Pull the piston assembly (B) out of the piston cylinder (C).

2. Remove the piston cylinder assembly by turning the piston cylinder counter-clockwise when viewing the sprayer from the bottom.

   • Caution: The piston cylinder may have sharp edges.

3. Check for vertical scratches on the inside of the piston cylinder and the piston. If one or both are scratched replace them.

4. To replace the collar, push it off of the crown of the piston with your thumb. You will see form-fitted slots to install the new collar onto the piston crown.

5. There are 2 valve plates on the piston cylinder, one on the inside of the cylinder and one on the outside top. The valve plates are held in place with a screw and washer and can be removed and replaced using a Phillips head screwdriver.

   • The 2 o-rings can be removed and replaced as well. Ensure that the o-rings are positioned in the o-ring grooves in the piston cylinder.

6. Grease the 2 O-rings on the piston cylinder (do not get any grease on the valve plate) and screw the piston assembly into the pressure cylinder base.
   Screw the piston cylinder clockwise until tight and the bottom O-ring is no longer visible. When properly placed, the tab on the piston cylinder will line up with the rib on the pressure cylinder base.

7. Apply Petroleum jelly to the inside of the piston cylinder wall and on the collar, and reinstall the piston assembly into the piston cylinder.

8. Insert the piston at an angle with the leading edge of the collar placed over the slot in the piston cylinder. Bolt the piston assembly to the pump shaft using the lever bolts.

9. Replace the protective cap. Tighten the nut and bolt. Reinstall the pump handle. Replace the hose and firmly secure the hose clamp in place.

DISASSEMBLING AND REPAIRING THE PRESSURE CYLINDER

Only remove the pressure cylinder if the cartridge filter is clogged or the sprayer is leaking between the pressure cylinder o-ring and tank.

1. Release the pressure from the sprayer and remove all liquid from both the pressure cylinder and tank.
2. Remove hose.
3. Remove the In-Tank filer from the pressure cylinder (located inside the tank- fig 1).
4. Remove 2 bolts attaching the pivot lever to the pump shaft and remove the piston assembly (fig. 2a & 2b).
5. Remove the large clamp holding the pressure cylinder and tank together (fig 1).
6. Rock the pressure cylinder back and forth and push it down to free it from the tank (fig 1).
7. Once freed the entire assembly can be removed by maneuvering it through the base frame (fig 3a & 3b).
8. At this point, the filter cartridge in the pressure cylinder base can be removed with pliers and cleaned or replaced (fig 4).
9. The pressure cylinder o-ring can also be replaced. DO NOT stretch the o-ring over the bottom flange. Assemble the o-ring over the top of the cylinder. Apply petroleum jelly to the o-ring before reinstalling the pressure cylinder assembly into the tank (fig. 3b).
10. The pressure regulator can also be replaced at this point if necessary by unscrewing it from the pressure cylinder. If replacing apply petroleum jelly to the pressure regulator o-rings before installing (fig. 5).
11. Reassemble backward from steps 6 through 2, performing each step in reverse.
    • Note: there is a notch/tab combination in the pressure cylinder/tank to be used for alignment (fig. 6).

DISASSEMBLING AND REPAIRING THE SHUT-OFF VALVE

1. Assembled shut-off valve (Figure 1).
2. Remove the retaining pin (A) (Figure 2) place the notched end of the retaining pin on a hard surface and push down.
   • Remove the retaining pin and slide the handle off the valve.
3. Remove the screw cap (o-ring attached), spring, and valve body (B) (Figure 3). Replace worn parts. Lubricate the O-rings and reassemble by reversing the steps above. Place the handle groove in the slotted area of the valve body and make sure the locking clip is positioned correctly. Insert the retaining pin. Push down on the handle a few times to distribute the lubricant evenly. (C) Check the filter at the end of the shut-off valve for debris. Remove the filter and flush it with water to clean it out.

REPLACEMENT PARTS ORDER INFORMATION

NOZZLE ASSEMBLY

Congratulations.

• You have just purchased a quality Chapin product.
• Register Your Sprayer Online@www.chapinmfg.com/warranty.asp
• Chapin International, Inc
• P. O. Box 549 700 Ellicot St.
• Batavia, NY 14021-0549 U.S.A.
• 1-800-950-4458
• www.chapinmfg.com
• Due to our ongoing product improvement process, product specifications may change without notice. U.S. and foreign patents pending.

Documents / Resources

| CHAPIN 61900 4 Gallon Tree and Turf Pro Commercial Backpack Sprayer [pdf] User Manual
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