Graco 222–340 Instructions-parts List Manual

INSTRUCTIONS-P

This

INSTRUCTIONS and WARNINGS.

READ AND RETAIN FOR REFERENCE.

ARTS LIST

manual contains

IMPORTANT

307–922

Rev

B

Supersedes A

MINI-WETTER

250

psi (17.5 bar) MAXIMUM WORKING PRESSURE

SPRA

Y SYSTEM

Model 222–340, Series A

120 Volt AC,1 Phase, 0.8 Amp

U.S. Patent No. 4,722,230; 4,652,024

Foreign Patents Pending

CONTENTS

Terms 2.

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Warnings 2
System
Setup 6
Startup 7
Operation 7
Maintenance

Troubleshooting
Repair

Parts
Accessories 19
Technical

. . . . . . . . . . . . . . . . . . . . . . . . .

Description5. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . .

Flushing 8
Roller

Roller
Fuse 12
ON/OFF
Rectifier 12
Power
Pressure
Outlet Valve 13.
Inlet Valve 13.
Diaphragm 14
Suction Tube 14.
Priming Valve & T
Motor,

. . . . . . . . . . . . . . . . . . . . . . .

Cover9. . . . . . . . . . . . . . . . . . .

Chart

. . . . . . . . . . .

V

alve 11.

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

Switch

. . . . . . . . . . . . . . . . . . . . . .

Supply Cord

Switch

Conn Rod, Bearing

Drawing & Lists

Data

. . . . . . . . . . . . . .

. . . . . . . . . . .

. . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

ube 14.

. . . . . . . . .

. . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

10.

12.

12.

13.

15.

16.

20.

GRACO INC. P.O. BOX 1441

COPYRIGHT

MINNEAPOLIS, MN

1988, GRACO INC.




55440–1441

TERMS

Be

sure you read and understand each of these terms

reading the rest of the manual.

fore

be

-

CAUTION: Alerts user to avoid or correct conditions

could damage or destroy the equipment.

which

WARNING: Alerts user to avoid or correct conditions

could cause bodily injury

which

.

WARNING

Be sure all operators of this equipment read, understand,

and follow the warnings and instructions in this manual !

GENERAL SAFETY

Use extreme care not to splash material, contaminated

water

flushing
eyewear.

Be sure the area in which you are working is well venti-

to avoid a buildup of harmful material fumes.

lated,

To reduce the risk of electric shock,

system

operate

, or solvent into your

to rain

.

Always store the system indoors. Do not

the pump with the base cover removed.

ELECTRICAL GROUNDING

Electrical grounding is essential to reduce the risk of an
electric shock or other serious bodily injury from static
sparking.
page

Read and follow the

6 of this manual.

eyes. W

grounding instructions on

ear protective

do not expose the

NOTE: Gives additional explanation of a procedure or

hints.

helpful

EQUIPMENT MISUSE HAZARD

This

system is designed to be used at

MAXIMUM WORKING PRESSURE

or accessories which are

nents
PT2000

Any misuse of this equipment, such as modifying parts,
using incompatible material or solvent, or using worn or
damaged
result
damage.

Never
could

Check all parts of the system regularly and repair or re­place

System.

parts, can cause the equipment

in

serious bodily injury

alter or modify any part of this equipment; doing

cause it to overpressurize or malfunction.

any worn or damaged parts immediately

designed for use with the

, fire, explosion and property

250 psi (17.5 bar)

. Use only compo-

to rupture and

so

.

HAZARD OF USING FLUIDS CONTAINING
HALOGENATED HYDROCARBONS

Never use 1,1,1–trichloroethane, methylene chloride,
other halogenated hydrocarbon solvents or fluids con-

such solvents in this equipment.

taining
result in a serious chemical reaction, with the possibility
of

explosion, which could cause death, serious bodily in

and/or substantial property damage.

jury

Such use could

-

307-922



Consult your material suppliers to ensure that the fluids

used are compatible with aluminum and zinc

being

parts.

AVERTISSEMENT

Assurez–vous que tous les utilisateurs de cet équipment lisent, comprennent et

observent les avertissements et les instructions de ce manuel!

SECURITE GENERAL

Faites

extrêmement attention de ne pas éclabousser de

peinture, d’eau de rinçage sale ni de solvant dans les

Portez de lunettes de protection.

yeux.

Assurez-vous que l’endroit où vous travaillez est bien

afin d’éviter l’accumulation des vapeurs toxiques de

aéré
peinture.

Pour réduire

le système à la pluie.

pas

l’intérieur.

le

risque de décharge électrique,

Rangez toujours

n’exposez

le système à

MISE A LA TERRE

Il

est essentiel d’ef
le risque de décharge électrique et de blessures
sérieuses résultant des étincelles d’électricité statique.

et observez les instuctions de mise

Lisez
page 6 de ce manuel.

fecteur la mise à la terre pour

à la terre, à la

réduire

DANGERS POUVANT RESULTER DU
MAUVAIS USAGES DE L‘EQUIPMENT

Ce

système est conçu pour être utilisé à une

MAXIMUM DE FONCTIONNEMENT de 17.5 bars (250

N’utilisez que des pièces ou accessoires qui sont

psi).

conçus

L’utilisation
des
patibles, l’utilisation de pièces usées ou abîmées peuv­ent entrainer la rupture de l’équipement et causer des
blessures graves, un incendie, une explosion et des
dégâts

Ne changez et ne modifiez jamais aucune pièce du
système et réparez ou remplacez les piéces usées ou
abîmées

Vérifiez régulièrement toutes les pièces du système et
réparez ou remplacez les pièces usées ou abîmées
immédiatement.

pour être utilisés avec le système PT2000.

incorrecte de cet équipement, la

pièces, l’utilisation de peinture ou

matériels.

immédiatement.

PRESSION

modification

de solvant incom

-

307-922

3

ADVERTENCIA

Asegurarse de que todos los operadores de este equipo lean, entiendan

y repeten las precauciones e instrucciones indicadas en este manual.

SEGURIDAD EN GENERAL

Tener extremo cuidado de no salpicarse los ojos con
pintura,
gafas

Asegurarse de que el lugar de trabajo tenga buena
ventilición, para evitar la acumulación de vapores de
pintura

Para reducir el riesgo de sufrir un choque eléctrico,

dejar este sistema expuesto a la lluvia.

guardarlo

agua de enjuague contaminada o solvente. Usar

protectoras.

nocivos.

Siempre

bajo techo.

PUESTA A TIERRA

La puesta a tierra es esencial para reducir el riesgo de
sufrir un choque eléctrico u otras lesiones corporales
graves debido a chispas estáticas. Leer y seguir las
instrucciones

dadas en la pàgina 6 de este manual.

no

PELIGRO POR MAL USO DEL EQUIPO

Este sistema está diseñado para una

TRABAJO

componentes o accesorios diseñados para usarse con

sistema PT2000.

el

El

uso indebido

las

piezas, uso
piezas dañadas o desgastadas, podría causer la rotura
del equipo y terminar en graves lesiones personales,
incendio,

Nunca alterar o modificar ninguna pieza del equipo;
el hacerlo podría causar sobrepresión o malfunciona­miento.

Revisar con regularidad todas las piezas del sistema y
reparar
desgastadas.

MAXIMA de 17.5 barías (250 lbs/pulg2).

de este equipo, tal como modificación de

de pintura o solvente incompatible, o de

explosión y daños a la propiedad.

o sustituir de inmediato las que

PRESION DE

Usar

estén dañadas o

307-922

4

MINI-WETTER SYSTEM DESCRIPTION

PRIMING TUBE

SUCTION

INLET V

MOTOR

HOSE

ALVE

PRIMING V

ALVE

POWER SUPPL

ON/OFF SWITCH

50 FT

. (15 M) HOSE

Y CORD

SPRA

Y W

AND

STRAINER

50 FT

. (15 M) HOSE

Motor

The motor drives the connecting rod which moves the
diaphragm.

Pressure

Switch

The pressure switch at the pump outlet turns the motor

and of

on

f to control material pressure.

Diaphragm

The diaphragm is the heart of the pump. Driven by the
connecting rod and motor , the movement of the dia­phragm draws material through the suction hose and to
the outlet valve.

Priming V

alve

The priming valve assists in priming the pump during
startup. Turning the priming valve counterclockwise
causes the material to drain directly back into the pail
through the priming tube. T urning the knob clockwise
causes the to flow through the fluid outlet valve and to

hose and spray valve.

the

0335
0285

Outlet V

The

alve

outlet valve has a ball check which prevents material

from flowing backwards into the pump. This helps keep

even supply of material to the roller each time you trig

an

the spray valve.

ger

Inlet V

alve

As the

diaphragm draws material

the

material passes through the inlet valve which opens

to

allow material

into the pump.

from the suction tube,

Outlet Hose

The hoses have swivel-type couplings for easy assem-

A larger diameter outlet hose and chemical-resistant

bly.
outlet

and suction

on page 19.

RIES

Spray V

The
and

alve

spray valve controls material flow by triggering it on

of

f.

hoses are available. See ACCESSO

-

-

307-922

5

INLET V

POWER SUPPL

ON/OFF SWITCH

SPRING GUARD MUST BE

A

T ROLLER VALVE INLET

Y CORD

SUCTION

MOTOR

PRIMING TUBE

HOSE

ALVE

SETUP

PRIMING V

FIL

TER

USE TWO WRENCHES
T

O TIGHTEN

25 FT

ALVE

. (7.6 M) HOSES

USE TWO WRENCHES

Fig

1

1. Remove
as

shown in Fig

T

O TIGHTEN

Y V

SPRA

USE

ALVE

TRIGGER

TWO WRENCHES

T

O TIGHTEN

all parts from the boxes and assemble them

1, following the notes on the drawing.

2. Prepare the material according to the manufactur­er’s recommendations. Remove any skin that may

formed on the top of the

have

the material

thin

.

material

WARNING

Never

remove

supply

cord. Be sure the outlet

In

the event of an electrical short circuit, grounding

reduces
escape

the third (grounding) pin of the power

is properly grounded.

the risk of an electric shock by providing an

wire for the electric current.

Inspect the power supply cord and extension cord

each use. Be sure they are in good condition

before
and

have

undamaged three-pin plugs. Replace im
mediately if either cord shows signs of wear or
damage.

307-922

6

. If necessary

-

,

3. Plug

the power supply cord into a properly grounded,
120 V electrical outlet. See Fig 2. Do not use an
adapter. All extension cords must have three wires.
Use the chart below for selecting the appropriate

gauge for the extension cord.

wire

Cord Length Extension

feet (meters) W

ire Gauge

1–100 (1–30) 18

100–200 (30–61) 16

200–300 (61–92) 14

over 300

GROUNDED

Fig 2

(over 92) 12

OUTLET

GROUNDING

PIN

0335
0285

0286

STARTUP

WARNING

Pressure

To

reduce the risk of serious bodily injury
injury from moving parts, or electric shock, always
follow
tem,
tem

1. T

2.

3. T

If

you suspect that pressure is not fully relieved after

following

turns

Place the suction hose in the pail of material

1.

2.

Plug in the sprayer

3.

Open the priming valve 2 turns

4. T

Relief Procedure

, including

this procedure whenever you shut of

when checking or servicing any part of the sys

and whenever you stop dispensing

urn the ON/OFF switch to OFF

Unplug the power supply cord.

rigger the spray valve to relieve pressure.

the steps above,

counterclockwise.

urn the ON/OFF switch ON.

open the priming valve

.

counterclockwise.

f the

.

.

sys

.

2

5. Y

ou can see the material being drawn
tion hose (if the hose is clean). As soon as you see
material flow through the priming tube, close the
priming valve. This usually takes less than 30 sec-

-

-

onds.

CAUTION

Failure to completely close the priming valve after
the system is primed will cause the valve to erode,
greatly shortening the valve life.

NOTE: If your system is hard to prime, first try to force

the suction tube. Hold the suction tube in a

feed
vertical
the system. If the system does not prime within
one minute, shut it off. Heavy viscosity material
may need to be thinned. Be sure to follow the
material manufacturer ’s recommendations on
thinning.

6. Trigger
extension. Once primed, the motor will run when
there is material demand, but appears to shut itself

when there is no material demand.

off

NOTE: An occasional start and stop of the motor when

the spray

position and pour

the spray

valve to prime the outlet hose and

valve is not triggered is normal.

material

into the suc

into it. T

urn on

-

WARNING

To reduce the risk of electric shock, do not expose

system to rain. Always store the system indoors.

the
Do not operate the pump with the base cover
removed.

CAUTION

Always
perature before using it to prevent damaging the
system.

1. With

allow cold equipment to warm to room tem

the system fully primed, trigger the spray

briefly until an even flow of material is spraying out

the tip.

of

OPERATION

2. Hold the spray tip approximately 12 in. (300 mm)

3. For low pressure spraying, use the 431 size tip

-

valve

4. For fine-finish spraying, use the fine-finish tip

5. When you ARE DONE spraying, turn the ON/OFF

6. Thoroughly

the surface and start spraying.

from

supplied
tern at a very low pressure when spraying fluids
about
penetrating

which produces a fine mist for “glove bag” applica­tions.

switch

use

with the

the viscosity of water

to OFF and trigger the spray valve.

to keep it in good working order

wand. This tip develops a spray pat

, such as wetting agents,

encapsulants and lockdowns.

flush the system immediately after each

. See page 8.

-

307-922

7

MAINTENANCE

CAUTION

Thorough flushing and proper maintenance are
essential

to keep your system working properly

.

Improper flushing or maintenance may prevent the
system from working the next time you need it, and

result in costly damage to the system.

may

Always

ly

Always

the

flush your system thoroughly and immediate

after each use.

drain all water out of the spray valve and

leave

system filled with mineral spirits to prevent corro

-

-

sion.

NOTE: A Garden Hose Flush Adapter , P/N 220–331,

be used if you are using penetrating or lock-

can
down

encapsulants.This adapter is placed at the

pump

inlet and uses a standard city water

to

aid in

flushing. Se

ACCESSORIES

supply

, page 19,

to order it. Instructions on how to use it are in-

with the adapter

cluded

Flushing Procedure

1. T

urn the ON/OFF switch to OFF

(Non oil–based materials only

.

)

.

2. Put the suction tube in a pail of warm, soapy water.
Hold the spray wand over the material pail, turn on

system, and trigger the

the

spray valve

to drain and
save the material in the hoses. See Fig 3. Release
the trigger and shut off the pump as soon as all the
material is drained. This avoids contaminating the
material

with the flushing water

.

5. Wash

6. Flush

of

f all external parts of the hoses,

and

wand,

and pump.

again with clean, clear water

spray valve

. Change the wa
ter as necessary , until the system is thoroughly
cleaned.

flush

7. Finally,
just

a few seconds. Open

off

the pump. Some mineral spirits

system

the system with clean mineral spirits for

the priming valve and turn

must be left in the

to prevent corrosion.

CAUTION

Never

leave water

the system. To prevent corrosion in the pump, and

or water-based

material

(latex) in

spray valve, your final flush must be with mineral
spirits.

the

8. Oil

needle in the

a

few times to distribute the oil. See Fig 3.

spray valve

and trigger the valve

-

3. Now

hold the

spray wand

over the flushing pail. T

on the pump and trigger the spray valve. Circulate

solution for three to five minutes (five to ten min

the

if using a cold solution). Open the priming valve

utes
for a few seconds to clean the priming tube. Close

priming valve.

the

4. Raise

the suction hose above the water and run

pump

for a few seconds

Shut

of

f the pump.

to drain the flushing solution.

urn

the

-

REGULARLY

OIL

Fig 3

Flushing Procedure (Oil-based Material Only)
NOTE: Follow

the instructions above, except use miner

spirits.

al

DO NOT

heat the mineral spirits.

0287

-

307-922

8

NOTES

307-922

9

TROUBLESHOOTING GUIDE

Ç

WARNING

Pressure

To

reduce the risk of serious bodily injury

Relief Procedure

, including

Thoroughly flush the system after each use to re-

down time and costly repair bills.

duce

injury from moving parts, or electric shock, always

this procedure whenever you shut of

follow

when checking or servicing any part of the sys

tem,

and whenever you stop spraying.

tem

1. T

urn the ON/OFF switch to OFF

2.

Unplug the power supply cord.

3. T

rigger the spray valve to relieve pressure.

If

you suspect that pressure is not fully relieved after

following

turns

PROBLEM CAUSE SOLUTION

Pump

the steps above,

open the priming valve

counterclockwise.

will not prime, or takes long time to prime

f the

sys

-

-

NOTE: If

.

2

Clogged

suction tube filter

Material

too thick

Outlet valve spring worn or damaged

Inlet valve stuck or damaged

you are not able to determine the
problem, or the problem and solution is not
cussed
thorized

in this chart, return the system to an au

service agency for repair

Clean.

Thin; try pouring

Pour material

If it doesn’t prime in one minute, replace the out

tem.

spring. See Outlet V

let

Depress

valve gently and pour in about 1 teaspoon

mineral

spirits. T

necessary.

CAUTION

cause of the

.

material

into suction tube.

into suction tube and try to prime sys

alve, page 14.

ry to

See Inlet V

prime pump. Replace valve if

alve, page 14.

DEPRESS LIGHTLY.
POUR IN 1 TEASPOON
MINERAL SPIRITS.

dis

-

-

-

-

Loose inlet hose nut

Pump will not start Power cord unplugged

ON/OFF switch turned of

Damaged motor

Fuse burned out.

Low

or no

material

Pump

runs after

flow

spray valve

trigger is released

Clogged spray tip

Loose inlet hose nut

W

orn or damaged priming valve Replace. See page 15.

Priming valve is open

Material

too thick

Damaged pressure switch

W

orn inlet and/or outlet valve

Worn

or damaged pressure switch

W

orn or damaged inlet valve

W

orn or damaged outlet valve

W

orn or damaged priming valve Replace. See page 15.

W

orn spray valve packings or needle

f T

0289

Tighten

Plug in.

urn on.

Replace. See page 16.

Replace.
turn
pair.

Clean thoroughly after each use. See Flushing on
page

Tighten.

Close.

Thin: Follow manufacturer‘s recommendations.

Replace. See page 14.

Replace. See page 14.

Replace. See page 14.

Replace. See page 14.

Replace. See page 14.

Repair

See page 13. If it burns out again soon, re

the system to an authorized repair agency for

8.

. See page 12.

re

-

-

307-922

10

Spray

V

alve

WARNING

Always follow the Pressure Relief Procedure
Warning

on page 10 before attempting any repair

NOTE: Order Repair Kit P/N 218–960 to repair this

valve.

spray

1. Tap

2. Remove

3.

out the pin (A) from the trigger (B) and slide the

trigger

of

f of the valve (N). See Fig 4.

the cap (C). Use a 1/2 in. socket wrench to

screw

the fluid housing (D) out of the valve. Remove

the

o–ring (J). See Fig 4.

Pull the needle (K) out with needle nose pliers. See
Fig 4.

4. T

ap the seat (G) out of the valve (N). See Fig 4.

5. Remove the ball (F) and spring (E) from the valve
handle.

6. Turn
the
and
See

See Fig 4.

the nylon screw (L)

into the packing (H). Insert

needle (K) through the bottom of the housing (D)

push the packing out the top of the fluid housing.

Fig 5.

N

.

J

K

D

C

B

E
F

A

G
H

Fig 4

0290

L

H

D

7. Clean

8. Grease

9. Guide

10. Guide

all parts

or

pipe cleaner to clean small orifices.

thoroughly

. Use a cotton-tipped swab

the needle (K) and packing (H). Insert the ta

end of the needle into the back (flat) side of the

pered
packing.

See Fig 6.

the tapered end of the needle into the assem

tool (M) and press

bly
end

of the tool. See Fig 6.

the lips of the packing over the

the tool (M) into the fluid housing (D) until the

needle

protrudes through

the bottom of the housing.
Lightly tap the end of the tool until you “hear” the
packing
pliers.

11. Grease

bottom in the housing. Remove the tool with

See Fig 6.

the seat (G) and place it on the fluid housing

so the seat which is formed on the inside diameter

out. See Fig 7.

faces

12. Install

the spring (E) in the spring cavity of the valve

handle (N), then install the ball (F) so it is centered

the spring. See Fig 7.

on

13. Place

the o-ring (J)

lightly

with your fingers, start the threads of the

around the fluid housing. Pushing

ing into the valve handle. T orque the housing to

in–lb (2.6–3 N.m). See Fig 7.

23–27

hous

K

-

Fig 5

0291

-

Fig 6

LIPS OF P

(H) F

ACKING

ACE OUT OF

HOUSING (D)

TAPERED

MHKD

END

0292

G

SEA

T MUST

F

ACE BALL

C

GREASE

-

E

14.

Push on the needle until you feel some resistance.

15. Grease the cap (C) and place it on the end of the
needle.

See Fig 9.

16. Slide the trigger (B) into place. Install the pin (A) in
the trigger

. See Fig 6.

TORQUE TO

D

23–27 in–lb

(2.6–3 N.m)

Fig

7

J

P

CENTER ON SPRING

307-922

N

0293

11

WARNING

Pressure

To

reduce the risk of serious bodily injury

Relief Procedure

injury from moving parts, or electric shock, always
follow

this procedure whenever you shut of

when checking or servicing any part of the sys

tem,

and whenever you stop spraying.

tem

1. T

urn the ON/OFF switch to OFF

2.

Unplug the power supply cord.

3. T

rigger the spray

If

you suspect that pressure is not fully relieved after

following

turns

the steps above,

counterclockwise.

valve to relieve pressure.

open the priming valve

.

WARNING

These

repair procedures should be performed only
by qualified repair person with an electrical back­ground,

using the proper tools. Failure to

cedures correctly can result in electric shock, or oth

serious injury and damage to the pump.

er

NOTE: For

all electrical repair

, follow the

Pressure Re

lief Procedure W arning above. Then remove

base cover (42). Before checking or operat

the

the system, reinstall the base cover

ing
sure

all wires are tucked in neatly

Fuse

1. Pull

Rectifier

1.

2.

(See Fig 8.)

the old fuse out of the fuse holder (65). Install a

new

fuse (67).

rated

at 1–1/4 amps.

Be sure you install ONL

(See Fig 9.)

Disconnect the four leads from the rectifier

Remove the screw (33) and rectifier (39).

.

3. Install a new rectifier so the positive terminal (+) is
closest

4. Connect

to the fuse holder (65). Install the screw (33).

the power supply cord’

s white lead to an un
marked terminal. Connect the pressure switch lead
to the other unmarked terminal. Connect the black
motor lead to the negative (–) terminal, and the red

lead to the positive (+) terminal.

motor

36

84

A

38

34

39

65

67

37

Fig 8

307-922

12

, including

f the

sys

-

-

2

do the pro

-

-

, making

Y a 3AG fuse,

.

82
33

25

33
42

33

0294

ON/OFF Switch

(See Fig 8 and 9.)

1. Disconnect the two leads from the ON/OFF switch
terminals. See Fig 9.

(34)

2. Remove

the

the boot (36) and pull the switch (34) out of

base. Remove the ground wire (84). See Fig 8.

3. Remove the top nut (A) from the new switch. Place

ground wire connector (84) on the switch and re

the

the nut. Install the new switch, aligning the tab

install
in

the base with

the boot.

stall

the slot in the switch. See Fig 8. In

4. Connect a pressure switch lead to the power-OUT

terminal, and a jumper wire lead to the power-IN
terminal.

Power Supply Cord

1. Disconnect

See Fig 9.

(See Fig 8 and 9.)

the white lead from the rectifier (39), and

the black lead from the fuse holder (65), and the

lead from the grounding screw (82).

green

2. From the inside of the base, use a screwdriver to

-

-

push the strain relief bushing (38) out of the base.
Remove

the bushing and power supply cord.

3. Slide the strain relief bushing over the new power

supply cord. Press the bushing together and then

the bushing into the base.

press

4. Connect the green ground wire to the grounding

(82) and secure it with a washer (81) and nut

screw
(80). Connect the black lead to the fuse holder (65)
and the white lead to an unmarked terminal on the
rectifier (39).

WARNING

To maintain grounding continuity in your system,

to

reduce the risk of electric shock, check to be

and
sure

the ground wires are properly connected. The

power

supply cord’

-

the screw (82), and the ground wire (84) connects
between the ON/OFF switch and the screw (82).

s green ground wire connects

Also be sure the screws (25 and 33) are tightly
screwed

into the base. See Fig 8 and9.

80
81

WHITE

84

34

33

39

PRESSURE
SWITCH

LEADS

38

37

OUT

IN

MOTOR

LEADS

JUMPER

WIRE

43

GROUND

Fig 9

GREEN

WIRE

65

RED

33

25

-

-

to

(2)

82,81,80

0295

Pressure

Switch

(See Fig 9, 10 & 1

1.)

1. Disconnect the pressure switch leads from the ON/
switch and from the rectifier

OFF

2.

Remove the front cover (23). See Fig 1

3.

Unscrew the retainer (14) and remove the pressure

. See Fig 9.

1.

switch (12) and o-ring (12a). See Fig 10.

4. Grease and install a new o-ring (12a) in the pump

housing

(9). See Fig 10.

Inlet Valve

1. Unscrew

(See Fig 1

1.)

the nut (45) on

the suction hose (44). Screw

the inlet valve housing (1) out of the pump housing

Remove the inlet valve (3).

(9).

2. Grease
in
ing
hold

the inlet valve (3)

to hold it in place. Install it

the valve housing (9). Screw the inlet valve hous

(1) into the pump housing. Have someone firmly

the pump housing (9) and then torque the inlet

valve to 470–490 in–lb (53–55 N.m).

-

5.

Slide the retainer (14) over the pressure switch and
screw

the retainer into the pump housing. T

retainer

to 55–65 in–lb (6.2–7.4 N.m). See Fig 1

orque the

1.

6. Guide the pressure switch leads through the base.
Connect a lead to the power-OUT side of the ON/

switch (34) and connect the other end to an un

OFF
marked

7.

Reinstall the front cover

terminal on the rectifier (39). See Fig 9.

.

CAUTION

To

avoid damaging the pressure switch, do not

it

or press on the center of the switch.

Outlet V

1. Remove

2. Tip

alve

(2a) and remove the gasket (2b)

ting

(See Fig 10.)

the

outlet hose (64). Unscrew the outlet fit

the pump forward to remove the ball (2d).

and spring (2c).

drop

3. Use a 1/4 in. square socket wrench extension to

out the seat (2e).

screw

-

-

1

9

12a

LUBRICATE

12

Fig 10

44

10

2f

2e

2d

TORQUE TO

280–300 in–lb

(32–34 N.m)

14

TORQUE TO
55–65 in–lb
(6.2–7.4 N.m)

TORQUE TO
80–100 in–lb

(13.5–16 N.m)

2

2c

2b

2a

0296

4. Use a pointed tool, such as a dentist’ s pick, to re-

the seal (2f).

move

5.

Thoroughly clean and dry all parts.

6. Tip the pump back. Install a new seal (2f), making

it lays flat.

sure

7. Install the seat (2e) and torque it to 80–100 in–lb
(13.5–16

8.

Drop in the ball (2d),

N.m).

making sure it stays there!

CAUTION

Do

not let the

(12). If that happens, and the outlet fitting (2a) is

ity

ball drop into the pressure switch cav

screwed into the pump, the switch will be perma-

damaged.

nently

9. Check the ball stop pin in the outlet fitting (2a) for
wear or damage. Replace the fitting, if necessary .
Place a new gasket (2b) around the fitting. The last

on one end of the spring (2c) is turned in. Place

coil
this

end on the ball

stop pin. Screw the fitting into the

pump housing, torquing to 280–300 in–lb (32–34

).

N.m

45

1

TORQUE TO

240–260 in–lb

(27–29 N.m)

1b

9

­23

24

Fig 11

307-922

0297

13

Diaphragm (See

PTFE

PTFE

Fig 12

.)

CAUTION

Replace the diaphragm whenever you remove the
pump housing (9), or after each 100 hours of use,
whichever comes first. During use, small grooves
are formed in the diaphragm which cannot be re­aligned properly. Reusing a diaphragm may cause
leaking,

resulting in costly pump damage.

1. Remove the screws (15). Tip the pump housing (9)
back, being careful not to damage the wires. Re-

the front cover (23).

move

2. Check

the diaphragm guide (1

1) in the

pump housing (9) and replace it if is worn or dam-

Clean the pump housing thoroughly

aged.
new

guide, flat

your

3. Screw

fingers.

the diaphragm (17)

side first, into the housing,

Be sure it is installed evenly

out of the connecting rod

assembly (18).

a soft

4. Use

brass or nylon bristle brush to clean the top

of the connecting rod and housing. Taking care not

damage the diaphragm grooves, gently clean the

to
bottom

5. Check
is
necting

of the pump housing (9).

the rod, motor bearing and eccentric. If there

any

material

or damage, clean or replace the con

rod assembly as explained on page 15.

6. Screw the new diaphragm (17) into the connecting

just until it

rod
[about

4–6 in–lb (0.4–0.7 N.m)].

bottoms out.

Then turn it 1/8 – 1/4 turn

CAUTION

Never

turn the diaphragm more than 1/4 turn when
torquing it, as that will prevent the diaphragm from
working

7.

properly

Apply thread lubricant to the screws (15) and install
them

with

.

the lockwashers (16) in the pump housing.

Torque the screws a few inch–pounds (N.m) at a

oppositely and evenly

time,

8.

Spin the motor shaft (D) to be sure it turns freely

Reinstall the front cover (23).

9.

Priming V

alve & T

ube

, to 85 in–lb (9.6 N.m).

(See Fig 13.

)

NOTE: Each new priming valve kit includes a priming

and fittings.

tube

1. Unscrew the nut on the handle (E) of the priming
(10a). Unscrew the stem of the handle.

valve

2. Screw

the priming valve (10a) out of the pump hous

ing (9).

3. Wrap the threads of the priming valve with r

Screw the valve

tape.

snugly into the pump housing

(9). The valve handle should be parallel with the

edge of the housing to avoid interference with

angled
the

inlet or outlet valves.

4. Slide the nut (10d) and ferrule (10c) onto the tube

Install the tube support (10b) in the end of the

(10e).
tube.

Screw the nut onto the priming valve, which will

seat

the ferrule.

5. Screw the stem of the handle (E) onto the priming
until it bottoms, and then back it out two turns.

valve
Hand

tighten the nut onto the priming

tighten

the stem into the valve.

307-922

14

valve, and then

bottom of the

. Press the

using only

.

.

44

47

11

17

45

46

18

15,16

9

D

Fig 12

-

47
45

10e
10d

46

1

1b

10c

10b

10a

E

WRAP

9

Fig

13

Suction Tube

-

1. Unscrew
(1). Remove the hose clamp (47). Slit the suction

ing
tube

to free the nipple (46).

(See Fig 13.

)

the nut (45) from the fluid inlet valve

2. With the nipple (46) inserted through the nut (45),

dampen the new hose (44) with warm water and
press the hose over the nipple. Screw the nut onto
the inlet valve housing (1). Press the hose further
onto the nipple, leaving about a 1/8 in. (3 mm) gap
between

3.

Install the hose clamp (47) and tighten snugly

4. Remove

the nut and hose end.

the filter housing (48)

and filter (49) from the
old suction hose. Install these parts on the new hose.
Dampen
and

the hose with warm water to ease the filter

filter housing onto the hose.

LUBRICATE
THREADS;
TORQUE
85 in–lb (9.6 N.m)

T

O

23

24

0298

10

WITH

T

APE

0299

hous

.

52

48

49

-

Connecting Rod and Bearing

(See Fig 14

.)

1. Remove the front cover (23). Remove the screws
Carefully tip back the pump housing. Unscrew

(15).
the diaphragm (17) and discard it.

CAUTION

Replace the diaphragm whenever you remove the
pump housing (9), or after each 100 hours of use,
whichever comes first. During use, small grooves
are formed in the diaphragm which cannot be re­aligned properly. Reusing a diaphragm may cause
leaking,

resulting in costly pump damage.

30

69

34

A

PRESS

FIT INT

QTY 2

O 22

17

15,16

LUBRICATE
TORQUE
85 in–lb
(9.6 N.m)

T

9
21,20

GREASE
BEARING
HEAVILY

18a
18b

O

18

2. Remove the motor screws (20). Lift the motor (30)

slightly. Holding the connecting rod (18a), pull the

away from the housing (22).

motor

3. Inspect

If
necting
tric,

4. Use

thoroughly

the bearing (18b) in the connecting rod (18a).

it is worn or any rollers are broken, replace the

rod assembly (18). Inspect the motor eccen

and replace the motor if the eccentric is worn.

your fingers to

pack high quality bearing grease

in between the bearing rollers.

CAUTION

Thoroughly
the bearing and the motor eccentric.

5. Use

grease the bearing to extend the life of

a soft

brass or nylon bristle brush to clean the top

of the connecting rod and housing. Taking care not

damage the diaphragm grooves, gently clean the

to
bottom

of the pump housing (9).

6. Install

the connecting rod assembly (18)

(22).

ing

Screw a new diaphragm (17) into the rod just

until it bottoms. T urn the diaphragm another 1/8 to

turn [about 4–6 in–lb (0.4–0.7 N.m)].

1/4

CAUTION

turn the diaphragm more than 1/4 turn when

Never
torquing it, as that will prevent the diaphragm from
working

properly

.

7. Align the motor with the pins in the connecting rod

housing
connecting

be

8. Loosely

(22). Guide the motor shaft (A) through the

rod bearing (18b).

sure it moves freely

.

install the lockwashers (21)

to hold the motor. Spin the motor shaft again. Alter-

tighten the screws. Spin the motor shaft

nately

CAUTION

Spinning the motor shaft while assembling the

ensures that parts

pump

are properly aligned. If they
are not, and you start the pump, serious damage
could result to the motor , bearing and connecting
rod. If you feel binding or resistance, disassemble
the parts, checking the spin often, until you deter-

and correct the cause of the binding.

mine

9. Position
housing.

the pump housing (9) on the connecting rod

Lubricate the screws (15)
them and the lockwashers (16). Torque the screws
a few inch–pounds (N.m) at a time, oppositely and

to 85 in–lb (9.6 N.m).

evenly,

10.

Reinstall the front cover (23).

con

-

-

in its hous

-

Spin the motor shaft to

and screws (20)

again.

and loosely install

42

43

33

22

Fig 14

23

24

0300

39

OUT

IN

MOTOR

LEADS

Fig

15

Motor (See

1.

Remove the front cover (23).

Fig 14 and 15.)

RED

(+)

0295

2. Remove the base cover (42). Disconnect the motor
leads from the positive and negative rectifier termi­nals.

See Fig15

.

3. Remove the motor screws (20). Lift the motor (30)
slightly. Holding the connecting rod (18a), pull the

away from the housing (22).

motor

4. Inspect

the bearing (18b) in the connecting rod (18a).
If it is worn or any rollers are broken, replace the
bearing and connecting rod assembly (18) as in­structed

5. Use

to the left.

your fingers to

pack high quality bearing grease
thoroughly in between the bearing rollers. See the
CAUTION

following Step 4, to the left.

6. Feed the motor leads through the rubber boot (69).
Align the motor with the pins in the connecting rod
housing
connecting

be

7. Loosely

(22). Guide the motor shaft (A) through the

rod bearing (18b).

sure it moves freely

.

install the lockwashers (21)

Spin the motor shaft to

and screws (20).
Spin the motor shaft again. Alternately tighten the
screws. Spin the motor shaft again. See the
CAUTION,

8. Connect
and the black motor lead to the negative (–) termi

nal

of the rectifier (39). See Fig 15.

nal

9. Install

following Step 8, to the left.

the red motor lead to the positive (+) termi

the base

cover (42) and bumpers (43), and the

front cover (23).

307-922

15

-

-

PARTS

DRA

WING

32

INT

27

O 22

30

PRESS FIT

44

47

45

46

15

LUBRICATE,
TORQUE TO

85 in–lb

(9.6 N.m)

Part

of 10

page 17

52

48

38

37

31

34
65

68

67

28

96

LABEL

36

69

16

11

17

22

35

LABEL

29
80
81

84

26
41

26
33

25
82

LABEL

SEE DET

54

LABEL

21

23

AIL A, page 17

20

18

24

49

0301

43

33

42

307-922

16

39

33

26

25

PARTS

DETAIL

1a

1b

DRA

A

WING & LIST

TORQUE TO
240–260 in–lb
(27–29 N.m)

APPL

Y SEALANT

TO THREADS

10

APPL
TO THREADS

Y SEALANT

9

2

2f

2e

2d

2c

2b

2a

12a

12

14

TORQUE TO

55–65 in–lb

(6.2–7.4 N.m)

TORQUE TO
80–100 in–lb
(13.5–16 N.m)

TORQUE TO
280–300 in–lb
(32–34 N.m)

0302

MINI–WETTER SYSTEM
Model 220–340,

Series A
Includes items 1 – 93
(

See items 60,64,85, and 87 to 93 on page 17.)

REF
NO. PART NO. DESCRIPTION QTY

1

220–930 HOUSING, valve, inlet 1

2

218–977* OUTLET VAL

2a 222–349
2b

180–454

2c

107–521

2d

101–956
218–968

2e
2f

180–455

3

218–976*

9

181–146
218–973*

10
11

181–152

12

218–974

12a

108–195

14

181–209

15 101–864 CAPSCREW

16

104–008

17

275–619*
218–981

18
20

108–237

21

100–079

22

181–147

23 181–166
24 108–236 SCREW
25 102–313 CAPSCREW
2
26 100–028 LOCKW

Includes items 2a–2f
. FITTING, outlet
. GASKET 1
. SPRING 1
. BALL
. HOUSING, seat, valve 1
. SEAL, washer
INLET VAL
HOUSING, pump 1
PRIMING VAL
GUIDE, diaphragm
SWITCH, pressure
.O–RING 1
RETAINER 1

1” long
LOCKW
DIAPHRAGM 1
CONNECTING ROD & BEARING 1
CAPSCREW
No. 8–32 x 0.625”
LOCKW
HOUSING, conn rod, Always order two
of Ref No. 27 when replacing housing
COVER, front 1

VE KIT

VE KIT

VE KIT

Includes

item 12a

, socket head, 5/16–18 x

ASHER, spring, 5/16”

, socket head,

ASHER, spring, No. 8

, mach, filh, No. 8–32 x 0.312”

, hex head, 1/4–20 x 1.75”

ASHER, internal, 1/4”

REF
NO. PART NO. DESCRIPTION QTY

27 108–213
28 108–230 SCREW

29 181–215
30 185–489 MOTOR, electric 1
31 181–180
32 181–182 HANDLE 1
33 108–224 SCREW

34 105–679
35 181–213
36 105–659 TOGGLE, boot 1
37 108–192 CORD, power supply 1
38 102–519 BUSHING, strain relief 1
39 108–219
41 183–301
42 181–156 COVER, base 1
43 108–220 BUMPER 4
44 181–231 HOSE, suction 1
45 181–159 NUT
46 181–160
47 108–231 CLAMP
48 181–163 HOUSING, filter 1
49 181–164 FILTER 1
52 178–342 SPRING CLIP 2
54 181–214
65 108–199 HOLDER, fuse 1
67 108–461*
68 108–223 SCREW
69 181–218 BOOT
80 100–072 NUT
81 103–181 LOCKWASHER, No. 6 1
82 103–854 SCREW

84

220–890

PIN, dowel

Self-tapping, 1/4–14 x 1”
LABEL, identification

BASE, pump

No.8 x 0.875”
SWITCH, toggle
LABEL, identification

RECTIFIER, bridge
TERMINAL, ground

NIPPLE, hose

LABEL, identification

FUSE, electrical, 3A

No. 6–32 x 0.25”
WIRE, ground

, mach, hex washer head,

, thd forming, pnh,

, coupling

, hose

WG, 1–1/4 amp

, thd forming, pnh, No. 6 x 0.5”

, rubber

, hex, No. 6–32

, mach, bdgh,

2

2
1

1

6
1
1

1
1

1
1
1

1

1
1
1
1

1
1

*Recommended spare parts to keep on hand.

See IMPORTANT PHONE NUMBERS on page 20.

1
1

1

1

1

1
1
1

4
4

4
4

1

4

3

307-922

17

PARTS

DRA

WING & LIST

These part numbers refer only to the parts illustrated on this page. See page 16 and 17 for the illustrations and part
numbers

REF
NO. PART NO. DESCRIPTION QTY

of other components in the system.

REF
NO. PART NO. DESCRIPTION QTY

60 218–954 VALVE, spray

64 108–356

85 108–228
87 108–408 ADAPTER 1
88 220–237 W

see repair kit 218–960 below

HOSE,fluid, nitrile rubber
3/8 npsm (m), 25” (7.6 m) long
NIPPLE, 3/8 npt

AND, tube

, cpld

89 186–334 ADAPTER, tip 1

1

90 171–602* WASHER, tip 1
91 185–559*
92 163–622* FINE FINISH TIP

2
1

93 166–969* WASHER, tip 1

1

*Recommended tool box spare parts.

431 SPRA

Y TIP

, 0.031” orifice

, 0.022” orifice

64

85

64

1
1

SPRAY

VALVE REP

AIR KIT

218–960

Includes items A – H
Individual parts not sold separately
See page 1

1 for instructions.

G

H

A

B
C

D

60

APPL

Y SEALANT T

HOLD STEADY WITH A WRENCH

TIGHTEN

87

O THREADS.

WITH WRENCH

.

88

E
F

89

91

93

92

0304

90

307-922

18

ACCESSORIES

Must

be purchased separately

CAUTION

Do

not use lacquer or lacquer thinner in the suction

and

outlet hoses supplied with this system.
fluids quickly destroy the hose material. Use the
optional

CHEMICAL–RESIST
OUTLET HOSES

For use with lacquer and lacquer thinners.

205–142

chemical–resistant hoses.

ANT SUCTION &

Outlet Hose; Nylon; 3/8” ID; cpld 3/8
npsm(fbe); 25’ (7.6 m);

MAXIMUM WORKING PRESSURE

219–095

Suction Hose; Nylon

.

300 psi (21 bar)

These

FIXED EXTENSION TUBES

*Included with sprayer

12 in. (0.31 m) long

*

18 in. (0.45 m) long

36 in. (0.91 m) long
72 in. (1.83 m) long

ADJUST

Must
outlet

ABLE EXTENSION TUBES

also order nipple to replace the (Ref no. 59) at the

of the roller valve.

18–36 in. (0.45–0.91 m) long
3 – 6 ft. (0.91–1.8 m) long
6–12 ft. (1.8–3.7 m) long
8–16 ft. (2.4–4.9 m) long

.

LARGER DIAMETER OUTLET HOSE

250 psi (17.5 bar) MAXIMUM WORKING PRESSURE

Use

this

hose when using more than 25 ft (7.6 m) of outlet
hose. Not intended for use with lacquer or lacquer
thinners.

220–009 Outlet

Hose; 3/8” ID; cpld 3/8 npsm(fbe);

50’ (15 m)

DUAL GUN ADAPTER

220–232

1000 psi (70 bar) MAXIMUM WORKING PRESSURE

Install

on Mini-W

multiple

FLUSH ADAPTER

Allows
Mini–Wetter of penetrating and lock-down encapsula­tors.

glove application.

you to use the city water supply to quickly flush the

etter to allow use of two spray wands for

220–231

307-922

19

Maximum
Power

Operating Pressure

Requirements

Pump Output
Power

Supply Cord

W

etted Parts

T

ungsten Carbide, Stainless Steel, Nylon, Plated

Steel,

Weight

.

. . . . . . . . . . . . . . . . . . . . . . . . . . .

TECHNICAL

.

. . . . . . . . . . . .

.

. . . . . . . .

. . . . . . . . . . . .

Buna–N, Polyester

1 gallon (3.8 liter) in 5 minutes

.

. . . . . . . . . . .

Delrin ,

Polyurethane, Neoprene,

DA

TA

250 psi (17.5 bar)

.

. . . .

120 V AC, 60 Hz,

1

Phase, 1.0 Amp

No. 16 A

WG, 3 wire,

6’

(1.7 m) long

Aluminum, Brass, V

, Polyvinyl Chloride

13.5 lb (6.1 Kg)

MANUAL

Listed

below by the assembly

and DELETED parts.

220–340

iton ,.

CHANGE SUMMAR

changed are OLD, NEW

Old
New

Old
New

Old
New

Old
New

Deleted 86 185–169 Label

1

30

32

53

181–172
220–930

218–975
185–489

181–840
108–220

181–219
185–422

Housing
Housing

Motor
Motor

Handle
Handle

Label
Label

Y

, ADDED

Viton

is a registered trademark of the

DuPont Company

.

GRACO PHONE NUMBERS

TO

PLACE AN ORDER

or call this number to identify the distributor clos

tor,

to you:

est

1–800–328–0211 T

FOR TECHNICAL ASSISTANCE

formation or assistance regarding the application of

equipment:

Graco

1–800–543–0339 T

WARRANTY

Graco

warrants all equipment manufactured by it and bearing its name to be free from defects in material and workmanship on the date

of

sale by an authorized Graco distributor to the original purchaser for use. As purchaser’s sole remedy for breach of this warranty

will, for a period of twelve months from the date of sale, repair or replace any part of the equipment proven defective. This war

Graco
ranty

applies only when the equipment is installed, operated

This

warranty does not cover
plication,
component
structures,
maintenance

abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of non–Graco

parts. Nor shall Graco be liable for malfunction,

accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or

of structures, accessories, equipment or materials not supplied by Graco.

, contact your Graco distribu

-

-

oll Free

, service repair in-

oll Free

THE

GRACO W

, and Graco shall not be liable for

ARRANTY AND DISCLAIMERS

damage or wear caused by the incompatibility with Graco equipment of

and maintained in accordance with Graco’

, any malfunction, damage or wear caused by faulty installation, misap

s written recommendations.

,

-

-

This

warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for
verification
will

be returned to the original purchaser transportation

or

workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor and transportation.

DISCLAIMERS AND LIMITATIONS

THE
RANTIES
POSE,
EVERY
NO

CASE SHALL GRACO’S LIABILITY EXCEED THE AMOUNT OF THE PURCHASE PRICE. ANY ACTION FOR BREACH OF W

BE

BROUGHT WITHIN TWO (2) YEARS OF THE DA

EQUIPMENT NOT COVERED BY GRACO WARRANTY

GRACO
PURPOSE,

These
their

20

of the claim. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment

TERMS OF THIS WARRANTY CONSTITUTE PURCHASER’S SOLE AND EXCLUSIVE REMEDY AND ARE IN LIEU OF ANY OTHER W

(EXPRESS OR IMPLIED), INCLUDING W

AND OF ANY NON–CONTRACTUAL LIABILITIES, INCLUDING PRODUCT

FORM OF LIABILITY FOR DIRECT

MAKES NO W

WITH RESPECT T

items sold, but not manufactured by Graco (such as electric motor

manufacturer

Subsidiary and Affiliate Companies:

ARRANTY

. Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.

Factory Branches:

, AND DISCLAIMS ALL IMPLIED W

O ACCESSORIES, EQUIPMENT

GRACO

, SPECIAL OR CONSEQUENTIAL DAMAGES OR LOSS IS EXPRESSL

Atlanta, Chicago, Dallas, Detroit, Los Angeles, Mt. Arlington (N.J.)

INC.P.O. BOX 1441

PRINTED

307-922

prepaid. If inspection of the equipment does not disclose any defect in material

ARRANTY OF MERCHANT

TE OF SALE.

ARRANTIES OF MERCHANT

, MA

TERIALS, OR COMPONENTS SOLD BUT NOT MANUF

Canada; England; Korea; Switzerland; France; Germany; Hong Kong; Japan

IN U.S.A.

307–922 7–88 Revised 8–92

ABILITY OR W

LIABILITIES, BASED ON NEGLIGENCE OR STRICT LIABILITY

, switches, hose, etc.) are subject to the warranty

ARRANTY OF FITNESS FOR A P

MINNEAPOLIS, MN

ARTICULAR

Y EXCLUDED AND DENIED. IN

ARRANTY MUST

ABILITY AND FITNESS FOR A P

ACTURED BY GRACO.

55440–1441

ARTICULAR

, if any, of

AR-

PUR

-

.