Chapin PROSERIES Series User manual

Chapin International, Inc

P.O. Box 549 700 Ellicott St.

Batavia, NY 14021-0549 U.S.A.

1-800-950-4458 www.chapinmfg.com

PROSERIES™

BACKPACK SPRAYER

See website for warranty detail

Model 64800 • 4G/ 15L

016767R0122

Carefully Read These Instructions Before Use

WARNING

Use and Care Manual

DO NOT RETURN THIS

SPRAYER TO STORE

Call: 1-800-950-4458

www.chapinmfg.com

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

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

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

tank by tightening hose clamp if necessary. Ensure 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.

Chapin Backpack Sprayer Operator’s Manual - English

WARNING

CAUTION

1. Poly

Nozzle Cap

2. Retaining

Nut

3. Nozzle

Body

4. Nozzle

Gasket

5. Elbow

Figure 3Figure 2Figure 1

1. Brass

Nozzle Cap

2. Retaining

Nut

3. Nozzle

Body

4. Nozzle

Gasket

5. Elbow

Nozzle

Gasket

Retaining Nut

Elbow

Fan Nozzle Tip

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.

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.

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.

O-ringWand

Retaining

Nut

Shut-off

Valve

Chapin Backpack Sprayer Operator’s Manual - English

WAND HOLDER

The wand easily snaps into

handle.

Figure 1 Figure 2

Line up holes Figure 3

Slide bolts through holes

Figure 5

Right Hand

Figure 4

Tighten nut to bolt

Threaded Bolt

Nylon Lock Nut

A. Pump Shaft

B. Bolts

C. Pump Handle

D. Nuts

Pump

Handle

Pump

Shaft

Completed Assembly

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 holes and shaft holes. Slide the bolts (B) through the aligned

holes as shown in ﬁgure 3. Tighten nuts (D) to bolts. There are holes in the

pump handle to allow for either left (ﬁg.2-4) or right (ﬁg.5) hand mounting.

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.

Chapin Backpack Sprayer Operator’s Manual - English

3 STAGE FILTERING SYSTEM

Pressure

Cylinder

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

Stage 3

(removable

Shut-off ﬁlter)

Figure 2 Stage 2 (removable In-tank 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.

Chapin Backpack Sprayer Operator’s Manual - English

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 lock-

on 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.

LOCK-ON POSITION NEUTRAL POSITIONLOCK-OFF POSITION

Locking Mechanism Handle

Down

Handle

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.

Chapin Backpack Sprayer Operator’s Manual - English

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.

Chapin Backpack Sprayer Operator’s Manual - English

TROUBLE SHOOTING YOUR SPRAYER

Symptom Possible Reason Correction

Difﬁculty actuating the pump

lever and/or pump handle

moves itself back up.

Upper valve plate sticks Clean or replace valve plate

Little or no resistance during

repeated pumping – no

pressure.

Damaged/worn/dirty/upper and or lower valve

plate

Clean or Replace Valve Plate

Damaged /worn upper o-ring on piston Replace O-ring

Diaphragm pump is damaged Replace Diaphragm Pump

Too much resistance after just

a few pumping strokes but

pressure only lasts brieﬂy.

Not enough air cushion in the pressure

chamber

Release pressure in pressure

chamber.Remove the hose & drain

pressure chamber. Reconnect the

hose.

Upper valve plate damaged/worn/dirty Clean or replace upper valve plate

Upward pumping action is more

difﬁcult and/or pump handle

moves itself backdown.

Vent hole is clogged Clear the vent hole in cap.

Clogged ﬁlter Clean in tank ﬁlter

Piston cylinder intake clogged Clean piston cylinder intake

Leaks at Diaphragm Pump Damaged/worn/O-rings Replace O-rings on Diaphragm Pump

Damaged Diaphragm Pump Replace Diaphragm Pump

Shut-off leaks Connections loose Tighten connection.

Worn or damaged shut-off Rebuild or replace the shut-off valve.

Wand assembly leaks Connections loose Tighten connection.

Damaged or worn o-ring/gasket Replace o-ring/gasket.

Nozzle assembly leaks Connections loose Tighten connection.

Damaged or worn o-ring/gasket Replace o-ring/gasket.

Leak between pump

assembly and tank

Pump clamp loose Tighten clamp.

O-ring worn or damaged Replace pressure chamber o-ring.

Hose leaking at tank outlet Hose clamp loose Tighten clamp.

Hose leaking at shut-off Connection loose Tighten retaining nut.

Damaged or worn o-ring/gasket Replace o-ring/gasket.

Figure 1

In-Tank

Filter

1. Release the pressure from the sprayer and remove all liquid from

both the pressure chamber and tank.

2. Remove ﬁlter basket and the In-tank ﬁlter from the pressure

chamber (ﬁg. 1).

3. Remove hose (ﬁg. 2).

4. Remove 2 bolts attaching the pivot lever to the pump shaft and

remove diaphragm assembly (ﬁg. 3).

5. Remove the 2 bolts holding back spine/frame (ﬁg. 4), and the back

spine/frame will come off.

6. Rock the pressure chamber back and forth and push down to free it

from the tank (ﬁg 5). Once freed the entire pump assembly can

be removed.

7) The pressure chamber o-ring can 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 assembly into the tank (ﬁg. 6).

8) Reassemble in reverse of removal. Note: there is a notch/tab

combination in the pump assembly/tank to be used for

alignment (ﬁg. 7).

Figure 2

Figure 3

Figure 4

Pressure

Chamber

o-ring

Pump

Assembly

Figure 6

Pressure

Cylinder

Notch

Tank Tab

Figure 7

Figure 5

Pressure

Chamber

Filter

Basket

DISASSEMBLING AND REPAIRING THE PUMP ASSEMBLY

Chapin Backpack Sprayer Operator’s Manual - English

Figure 2

Figure 3

Figure 5

O-rings

O-ring

Figure 6

Pressure

Cylinder Base

Figure 7

Figure 8

Diaphragm Pump

Alignment Mark

Pressure Cylinder Base

Alignment Mark

Diaphragm

Cover Slot

Figure 1

1) Unscrew diaphragm pump from pressure cylinder base.

The use of a strap wrench or other mechanical means may

be neccesary (ﬁg. 1).

2) Remove cotter pin from diaphragm pump assembly pivot

lever connection. Remove pivot lever and connection

hardware from diaphragm pump assembly (ﬁg. 2 and 3).

3) Discard Diaphragm Pump Assembly.

4) Attach pivot lever and connection hardware to new

diaphragm pump assembly. Make sure orientation is

correct with slot in diaphragm cover ( ﬁg. 4).

5) Apply Petroleum jelly to 2 diaphragm pump o-rings (ﬁg. 5).

Screw diaphragm pump assembly into pressure chamber

base (ﬁg. 6), making sure the o-ring seats inside the pressure

chamber base so that the o-ring does not show anymore (ﬁg. 7)

6) Align the diaphragm pump alignment mark with the pressure

cylinder base alignment mark (ﬁg.8). The slot in the diaphragm

cover will also be in alignment.

DISASSEMBLING AND REPLACING THE DIAPHRAGM PUMP

Pivot Lever Connection

Figure 4

Diaphragm

Cover Slot

Chapin Backpack Sprayer Operator’s Manual - English

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 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

ﬂush with water to clean out.

Figure 1

DISASSEMBLING AND REPAIRING THE SHUT OFF VALVE

Figure 2

Figure 3

Valve

Stem

Chapin Backpack Sprayer Operator’s Manual - English

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