Commercial
226612
DO NOT RETURN THIS
SPRAYER TO STORE
Call: 1-800-950-4458
www.chapinmfg.com
Commercial
Duty Sprayer
Use and Care Manual
Model 63900 • 4G/ 15L
WARNING
Carefully Read These Instructions Before Use
011944-1 R0314
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
1.Brass
Nozzle Cap
2.Retaining
Nut
2.Retaining
Nut
3.Nozzle
Body
Retaining Nut
3.Nozzle
Body
4.Nozzle
Gasket
Fan Nozzle Tip
Nozzle
Gasket
4.Nozzle
Gasket
Elbow
5.Elbow
5.Elbow
Figure 1
Figure 2
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
2E
Figure 3
SPRAYER COMPONENTS & USE INFORMATION, Continued
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.
A. Pump Shaft
B. Bolt
D. Nut
C. Pump Handle
Nylon Lock Nut
Threaded Bolt
Figure 2
Figure 1
Figure 3
Line up holes
Figure 4
Tighten nut to bolt
Slide bolt through holes
Figure 5
Figure 6
Right Hand
Left Hand
Pump Handle
Positioned For Use
(right hand shown)
Figure 7
Right Hand
STOW- AWAY PUMP HANDLE
Set
into
slot
Pull
up
Rotate
180º
3E
SPRAYER COMPONENTS & USE INFORMATION, Continued
INSTALLING THE SHOULDER STRAP
Shoulder
Strap
The top of both the shoulder straps and back pad straps are
attached to the top of the tank and are removable (figure 1). The
Back Pad
back pad strap attaches to the bottom of the tank (figure 2). The
back pad is attached to its strap with velcro and is removable (figure
3). 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. (figure 4).
Figure 1
Strap Assembly
Removable
Back Pad
Back Pad
Strap
Velcro
Attachment
Figure 2
Back Pad strap attachment
Figure 3
Removable Back Pad
WAND CLIP
The wand can be attached to
the pump handle using the
wand clip.
4E
Figure 4
Strap Attachment
SPRAYER COMPONENTS & USE INFORMATION, Continued
3 STAGE FILTERING SYSTEM
This backpack sprayer is equipped with a 3 stage filtering system (see figure
Stage 1
(Filter
basket)
Figure 1
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
Stage 2
(Removable
In-Tank Filter
Pressure
Cylinder
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 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 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-OFF POSITION
LOCK-ON POSITION
Locking Mechanism
NEUTRAL POSITION
Handle
Down
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
Correction
Diffculty actuating the pumphandle and/or
pump handle moves itself back up.
Upper valve plate sticks
Piston cylinder outlet passage clogged
Clean or replace valve plate
Clean piston cylinder outlet passage
Little or no resistance during
repeated pumping – no pressure.
Damaged/worn/dirty/upper valve plate
Piston Collar or piston cylinder
assembly is worn
Clean or Replace Valve Plate
Replace Piston/ Diaphragm assembly
Too much resistance after just a few Not enough air cushion in the pressure
pumping strokes but pressure only lasts
chamber
briefy.
Upper valve plate damaged/worn/dirty
Release pressure in pressure chamber
Remove the hose & drain pressure
chamber. Reconnect the hose.
Clean or replace upper valve plate
Upward pumping action is more diffcult and/orpump handle moves itself backdown.
Vent hole is clogged
Lower valve plate sticks
Clogged intake filter
Piston cylinder intake clogged
Clear the vent hole in cap
Clean or replace the valve plate
Clean the In-Tank filter
Clean piston cylinder intake
Leaks at Piston Cylinder
Damaged/worn/Dirty Collar
Damaged Piston Cylinder
Damaged Piston
Replace Piston/ Diaphragm assembly
Replace Piston/ Diaphragm assembly
Replace Piston/ Diaphragm assembly
Shut-off leaks
Connections loose Worn or damaged shut-off
Tighten connection
Rebuild or replace the shut-off valve
Wand assembly leaks
Connections loose Damaged or worn o-ring/gasket
Tighten connection
Replace o-ring/gasket
Nozzle assembly leaks
Connections loose Damaged or worn o-ring/gasket
Tighten connection
Replace o-ring/gasket
Leak between pump assembly
and tank
Pump clamp loose
O-ring worn or damaged
Tighten clamp
Replace pressure chamber oring
Hose leaking at tank outlet
Hose clamp loose
Tighten clamp
Hose leaking at shut-off
Connection loose
Damaged or worn o-ring/gasket
Tighten retaining nut
Replace o-ring/gasket
7E
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.
Rotate the pump shaft in order to reach two lever bolts(A).
Using an allen wrench, remove the lever bolts.
A
Figure 1
2)Remove bolts clamping the the two halves of the
Piston/Diaphragm pump housing together (Figure 2).
Figure 2
3)Pull the pump housing halves apart and inspect
piston collar/diaphragm for wear. Replace as
needed (Figure 3).
Figure 3
4)Guide lever through skirt (Figure 4).
Figure 4
8E
5)Align the “groove” in the skirt with the flat ledge
Groove
Flat
on the retaining ring. Align flat edge with hose
connection.
Figure 5
6)Re-assemble the two pump halves (fig.3).
Re-tighten all pump housing bolts.
Re-assemble hose and lever bolts.
Figure 6
DISASSEMBLING AND REPAIRING OR REPLACING 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. 2).
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). Pump shaft may be removed to ease the disassembly of the pump.
Pressure
Chamber o-ring
Clamp
In-Tank
Filter
Figure 1
Figure 2
Figure 3a
9E
Figure 3b
8. The pressure chamber o-ring can also be replaced.
Tank tab
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. 3b).
9.Reassemble backwards from step 7 thru 2, performing
Figure 4
Pump
Assembly
Notch
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
3) Remove the retaining nut (o-ring attached), spring, and valve
stem (B) (Figure 3). Replace worn parts. Lubricate the O-rings
Valve
Stem
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
B
C
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.
Figure 3
10E
REPLACEMENT PARTS ORDER INFORMATION
6-8122
Brass
Adjustable
Nozzle
6-8096
Flat Fan
Nozzle
6-8093
Poly
Adjustable
Nozzle
Retaining
Nut
6-8169
Filter
Replacement
Kit
6-8148
Nozzle Kit
Nozzle
gasket
Elbow with
o-ring
O-ring
Screw
Cap
Wand
6-8149
Wand
Assembly
Hose Washer
6-8105
Hose
Assembly
Retaining Nut
Hose
6-8120B
Shut-off Valve
Repair Kit
6-8138
Shut-off
Assembly
11E
REPLACEMENT PARTS ORDER INFORMATION
6-8224
Piston /Diaphragm
Pump
Elbow O-ring
Nozzle Gasket
Hose Gasket
6-8225
Piston Collar
6-8153
O-ring Kit
6-8146-1
Filter Basket
& Cap
Wand O-ring
6-8150
Wand Clip
6-8182
Backpad and
Straps
Congratulations!
You have just purchased a quality Chapin product.
Register Your Sprayer [email protected] 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.
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