Backpack

Sprayer

Model MS-41BP

4G/ 15L

WARNING

Carefully Read These Instructions Before Use

013529 R0514

WARNING

WARNING: Improper use or failure to follow instructions can result in explosive

failure causing serious eye or other injury. For safe use of this product you must read

and follow all instructions. Do not leave a pressurized sprayer in the hot sun. Heat can cause pressure build-up resulting in possible explosion. Do not store or leave solution in tank after use. Always wear goggles, gloves, long sleeve shirt, long pants and full foot protection when spraying. Never use any tool to remove pump if there is pressure in the pressure chamber.

Never pressurize sprayer by any means other than the original pump. Do not attempt to modify this sprayer. Replace parts only with manufacturer’s original parts. Never spray

flammable, caustic, acidic, chlorine, bleach or other corrosive solutions or heat, pressure, or gas producing chemicals. Always read and follow chemical manufacturer’s instructions before use with this sprayer as some chemicals may be hazardous when used with this sprayer.

SK 1158-1

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

• PRE-USE CHECK: Before each use check tightness of hose nut to be sure hose is

securely attached to the shut-off assembly. Insure hose is securely attached to the

tank by tightening hose clamp if necessary. Insure that all nozzle and wand

connections are tight. Insure the large pump clamp is tight. Insure the 2 bolts

used to attach the pump lever to the pump shaft are tight.

• Do Not exceed a tank solution temperature of 120º F/ 49º C.

NOTE: The tank and hose may have residual water in it due to quality testing performed on the sprayer.

1E

APPLICATIONS & USE FOR YOUR 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 cleaning section) before using.

Plant Food: Use different spray patterns for optimum foliage feeding or for 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 cleaning section) the sprayer first.

General Household Use: Apply detergents, cleaning solutions, warm water (do not exceed

120°F/49°C) or nontoxic household cleaning chemicals for carpets, floors, walls, glass, counter tops and ceilings. DO NOT use 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.

SPRAYER COMPONENTS & USE INFORMATION

NOZZLE ASSEMBLY

Figure 1-2

Unscrew the nozzle cap (1) from the nozzle body (3) with 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.

1. Poly

Nozzle Cap

2. Retaining

Nut

3. Nozzle

Body

1. Brass

Nozzle Cap

4. Nozzle

Gasket

5. Elbow

Figure 1

2. Retaining

Nut

3. Nozzle

Body

Retaining Nut

Fan Nozzle Tip

4. Nozzle

Gasket

5. Elbow

Figure 2

Nozzle

Gasket

Elbow

Figure 3

2E

SPRAYER COMPONENTS & USE INFORMATION, Continued

WAND ASSEMBLY

1. Make sure the o-ring is installed on the end of the wand. Insert the wand into shut-off valve.

2. Turn and tighten the retaining nut clock-wise onto the shut-off valve.

Retaining Nut

Wand

O-ring

Shut-off

Valve

INSTALLING THE PUMP HANDLE

The pump handle can be mounted on either side of the pump shaft (A). To install the pump handle place the handle (C) over the shaft (A) aligning the pump handle hole and shaft hole. Slide the bolt (B) through the aligned hole as shown in figure 1 thru 4. Tighten nut (D) to bolt. There are holes in the pump handle to allow for either left(fig.4) or right (fig.5) hand mounting.

Nylon Lock Nut

Threaded Bolt

Figure 1 Figure 2

Line up holes

D

C

A

B

Figure 3

Slide bolt through holes

Figure 4

Tighten nut to bolt

Pump Handle

Positioned For Use

(right hand shown)

Figure 5

Left Hand

Figure 6

Right Hand

3E

STOWAWAY PUMP HANDLE

Pull up

Rotate

180º

Set into slot

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.

In the event that the sprayer harness (straps) become contaminated with chemicals, it is recommended to thoroughly wash the straps with soap & water and allow to dry before using the sprayer.

WAND CLIP

The wand can be attached to the pump handle using the wand clip.

4E

SPRAYER COMPONENTS & USE INFORMATION, Continued

3 STAGE FILTERING SYSTEM

This backpack sprayer is equipped with a 3 stage filtering system (see figure

1). Stage 1 is a filter basket incorporated into the tank opening where fluid is added. Stage 2 filter is located at the inlet of the pressure cylinder. Stage 2 is a removable In-Tank filter. Stage 3 is a removable filter incorporated into the shut-off assembly. Periodic cleaning of these filters is recommended to insure consistent fluid flow through the sprayer. This will also reduce sprayer component wear.

The stage 3 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 3 shut-off filter as fluid can leak from the hose.

Figure 1 Stage 1

(Filter basket)

Stage 2

(Removable

In-Tank Filter

Pressure

Cylinder

Figure 2 Stage 2 (removable In-Tank filter)

Stage 3

(removable

Shut-off filter)

Guide edge facing away from pressure cylinder

Guide edge on pressure cylinder

FILLING THE SPRAYER

Make sure the filter basket is in place to keep debris from entering the tank.

Determine the amount of mixture needed for your application. Add the proper amount of water to the tank. Add the proper amount of chemical to the tank (check the chemical label for proper ratio of chemical). Stir mixture in tank with a clean utensil (like a paint stirrer). The tank will hold the 4-gallon

(15.1L) capacity plus the chemical.

It is not necessary to completely 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.

5E

SPRAYER COMPONENTS & USE INFORMATION, Continued

HELPFUL SPRAYING INFORMATION

Use RAPID pump strokes to prime the pump. You will know the pressure chamber is filling with liquid when you feel firm resistance from the pump. The air in the pressure chamber is compressed from repeated strokes. By pressing the hand lever on the shut-off, the valve opens. For safety lock-off feature

(no-spraying), pull up on handle and move red locking mechanism into lock-off position as shown in fig.

1. To disengage, pull up on handle and return red locking mechanism to neutral position as in fig. 3. For lock-on feature (continuous spraying), push down on handle and move red locking mechanism into lockon position as shown in fig. 2. To disengage, push down on handle and return red locking mechanism to neutral position as shown in fig. 3.

In the event that the handle becomes stuck in the lock-on (continuous spraying) position and the tank pressure needs to be relieved, carefully open the tank and place the wand inside the tank until the pressure is relieved.

LOCK-OFF POSITION

Locking Mechanism

LOCK-ON POSITION

Handle

Down

NEUTRAL POSITION

Handle

Up

Figure 1 Figure 2 Figure 3

For easy pump action use the END of the pump handle. The amount of liquid delivered during spraying depends on the rate of pump stroke. The fan nozzle tip is rated at .4 gpm at 40psi. This is the nominal operating pressure of the sprayer.

Note: If you experience a rapid drop in pressure, drain the sprayer completely and pump the handle with an empty tank. The pressure chamber will fill with the required volume of air to repressurize.

Perform 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 sprayers 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 (minimum of

30 strokes).

3) Fill tank half way 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 manufacturers instructions for clean up.

6E

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 dealer and always insist on original manufactured

replacement parts.

• Inspect the hose, wand, pump, tank and shut-off valve for wear, damage or leaks on a regular basis

and repair defects promptly.

TROUBLE SHOOTING YOUR SPRAYER

Symptom Possible Reason

Difficulty actuating the pump lever and/or Upper valve plate sticks pump handle moves itself back up. Piston cylinder outlet passage clogged

Little or no resistance during repeated pumping – no pressure.

Too much resistance after just a few pumping strokes but pressure only lasts briefly.

Upward pumping action is more difficult and/or pump handle moves itself backdown.

Damaged/worn/dirty/upper and or lower valve plate

Damaged /worn upper o-ring on piston

Piston Collar or piston cylinder assembly is worn

Not enough air cushion in the pressure chamber

Upper valve plate damaged/worn/dirty

Vent hole is clogged

Lower valve plate sticks

Clogged filter

Piston cylinder intake clogged

Valve Plate sticking When the handle is pulled up it moves itself back down

Leaks at Piston Cylinder Damaged/worn/Dirty Collar

Damaged Piston Cylinder

Damaged Piston

Shut-off leaks

Wand assembly leaks

Nozzle assembly leaks

Connections loose

Worn or damaged shut-off

Connections loose

Damaged or worn o-ring/gasket

Connections loose

Damaged or worn o-ring/gasket

Leak between pump assembly and tank

Hose leaking at tank outlet

Hose leaking at shut-off

Pump clamp loose

O-ring worn or damaged

Hose clamp loose

Connection loose

Damaged or worn o-ring/gasket

Correction

Clean or replace valve plate

Clean piston cylinder outlet passage

Clean or Replace Valve Plate

Replace O-ring

Replace Collar or Piston cylinder assembly

Release pressure in pressure chamber

Remove the hose & drain pressure chamber. Reconnect the hose.

Clean or replace upper valve plate

Clear the vent hole in cap

Clean or replace the valve plate

Clean in tank filter

Clean piston cylinder intake

Clean or replace valve plate

Clean or Replace Piston Collar

Replace Piston Cylinder

Replace Piston

Tighten connection

Rebuild or replace the shut-off valve

Tighten connection

Replace o-ring/gasket

Tighten connection

Replace o-ring/gasket

Tighten clamp

Replace pressure chamber o-ring

Tighten clamp

Tighten retaining nut

Replace o-ring/gasket

7E

DISASSEMBLING AND REPAIRING THE PISTON PUMP

A

Figure 1

C

B

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 in order 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.

Figure 2

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

Figure 3

Collar

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 on to the piston crown.

Figure 4

Intake

Piston

Cylinder

Upper

Valve

Plate

Lower

Valve Plate

Figure 5

Outlet

Passage

Pressure cylinder base rib

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

Phillipshead screw driver. The 2 o-rings can be removed and replaced as well. Insure 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.

Piston cylinder tab

Figure 6

8E

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.

Figure 7

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.

Figure 8

Protective

Dust Cap

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

Figure 9

DISASSEMBLING AND REPAIRING THE PUMP ASSEMBLY

1. Release the pressure from the sprayer and remove all liquid from both the pressure chamber and tank.

2. Remove hose.

3. Remove the In-tank filter from the pressure chamber.

4. Remove 2 bolts attaching the pivot lever to the pump shaft and remove piston assembly (fig. 2a & 2b).

5. Remove the large clamp holding the pressure chamber and tank together (fig 1).

6. Rock the pressure chamber back and forth and push down to free it from the tank (fig 1).

7. Once freed the entire pump assembly can be removed by maneuvering it through the base frame

(fig 3a & 3b).

Clamp

Pressure

Chamber o-ring

In-Tank

Filter

Figure 2a

Pump

Assembly

Figure 1

Figure 2b Figure 3a Figure 3b

9E

Tank tab

Figure 4

Pump

Assembly

Notch

8. The pressure chamber 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 chamber. Apply petroleum jelly to the o-ring before

reinstalling pump asembly into the tank (fig. 3b).

9. Reassemble backwards from step 6 thru 2, performing each step in

reverse. Note: there is a notch/tab combination in the pump

assembly/tank to be used for alignment (fig. 4).

DISASSEMBLING AND REPAIRING THE SHUT OFF VALVE

1) Assembled shut-off valve (Figure 1).

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.

A

Figure 2

Valve

Stem

C

Figure 3

B

3) Remove the retaining nut (o-ring attached), spring, and valve stem (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 stem and make sure the locking clip is positioned in the neutral position (see “Helpful Spraying Information” section). Insert the retaining pin. Push down on the handle a few times to distribute the lubricant evenly. Check filter (C) in end of shut-off valve for debris. Remove filter and flush with water to clean out.

10E

O-ring

Screw

Cap

Hose Washer

Retaining Nut

Hose

REPLACEMENT PARTS ORDER INFORMATION

99944100484

Flat Fan

Nozzle

99944100482

Brass Adjustable

Nozzle

99944100483

Poly Adjustable

Nozzle

99944100485

Nozzle Kit

99944100481

Filter

Replacement

Kit

Wand

99944100480

Wand

Assembly

99944100479

Hose

Assembly

99944100477

Shut-off Valve

Repair Kit

11E

99944100478

Shut-off

Assembly

99944100474

Piston

Cylinder

Assembly

99944100475

Pump Piston

Assembly

REPLACEMENT PARTS ORDER INFORMATION

Upper

Plate Valve

Upper O-ring

Lower O-ring

99944100471

Piston Pump

Repair Kit

Collar-

Pump Piston

O-ring-

Pressure Cylinder

Valve Plate-

Piston

Cylinder

Piston

Collar

O-ring-

Piston Cylinder

99944100486

O-ring Kit

Elbow O-ring

Hose Gasket

569035

Filter Basket

& Cap

Nozzle Gasket Wand O-ring

569036

Pump Handle

99944100472

Straps

99944100488

Wand Clip

ECHO, INCORPORATED

400 Oakwood Road, Lake Zurich, IL 60047 www.echo-usa.com

MS-41BP MSP10000001 - MS-41BP MSP99999999