Graco 310645P User Manual

Repair and Parts

RTX 1500 Electric Texture Sprayer

- For Water-Based Materials Only -

(Consult your Material Supplier for Warnings and Application Requirements)

Models: Page 2

Maximum Working Air Pressure: 45 psi (3.1 bar)
Maximum Working Fluid Pressure: 100 psi (6.9 bar)

Important Safety Instructions

Read all warnings and instructions in this
manual. Save these instructions.

NOTICE

Use RTX 1500 non-bleeder texture gun 248091.
All other guns will damage sprayer.

310645P

EN

ti4305a

Models

Models

Manual

Model Electric

Requirements

Country

Operation

287328*

Gun

248201 120V, 60 Hz, 15 A N. America 310624 310694 310616 English

248536 110V, 60Hz, 15A UK 310624 310694 310616 English

248370 / 248315 230V. 50 Hz, 10 A Europe 310624 310616 French

248370 230V. 50 Hz, 10 A Europe 310624 Dutch

248370 230V. 50 Hz, 10 A Europe 310625 310616 Spanish

248370 / 248315 230V. 50 Hz, 10 A Europe 310625 Italian

248370 230V. 50 Hz, 10 A Europe 310625 Portuguese

248370 / 248315 230V. 50 Hz, 10 A Europe 310625 German

248315 230V. 50 Hz, 10 A Europe 310697 Swiss

248315 230V. 50 Hz, 10 A Europe 310697 Danish

248370 230V. 50 Hz, 10 A Europe 310697 Norwegian

248370 230V. 50 Hz, 10 A Europe 310697 Swedish

248370 230V. 50 Hz, 10 A Europe 310698 Polish

248370 230V. 50 Hz, 10 A Europe 310698 Russian

248370 230V. 50 Hz, 10 A Europe 310698 Greek

248315 230V. 50 Hz, 10 A Asia 310699 Chinese

248315 230V. 50 Hz, 10 A Asia 310699 Japanese

248315 230V. 50 Hz, 10 A Asia 310699 Korean

248315 230V. 50 Hz, 10 A Australia 310699 310694 310616 English

Languages

*Auxiliary Air Hookup Kit

RELATED MANUALS

Model Country Manual Languages

ALL ALL

The following are general Warnings related to the safe setup, use, maintenance and repair of this equipment.
Additional, more specific warnings may be found throughout the text of this manual where applicable.

310645 English

2 310645P

Warnings

Warnings

The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual, refer back to these Warnings. Product-specific hazard

symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.

WARNING

Fire and Explosion Hazard

Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent
fire and explosion:

• Use equipment only in well ventilated area.

• Keep work area free of debris, including solvent, rags, and gasoline.

• Ground equipment in the work area. See Grounding instructions.

• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment

until you identify and correct the problem.

Equipment Misuse Hazard

Equipment misuse can cause death or serious injury.

• Do not exceed maximum working pressure or temperature rating of lowest rated system compo-

nent. See Technical Data, in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all

equipment manuals. Read fluid and solvent manufacturer’s warnings.

• Check equipment daily. Repair or replace worn or damaged parts immediately.

• Do not alter or modify this equipment.

• Use the equipment only for its intended purpose. Call your Graco distributor for information.

• For professional use only.

• Route hoses away from traffic areas, sharp edges, moving parts and hot surfaces.

• Do not use hoses to pull equipment.‘

•

• Comply with all applicable safety regulations.

Electric Shock Hazard

Improper grounding, setup, or usage of the system can cause electric shock.

• Turn off and disconnect power cord before servicing equipment.

• Use only grounded electrical outlets.

• Use only 3-wire extension cords.

• Ensure ground prongs are intact on sprayer and extension cords.

310645P 3

Warnings

WARNING

SKIN INJECTION HAZARD

High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like
just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the spray tip.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Do not spray without tip guard and trigger guard installed.

• Engage trigger lock when not spraying.

• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,

checking, or servicing equipment.

Cleaning Solvent Hazard with Plastic Parts

Use only compatible water-based solvents to clean plastic structural or pressure-containing parts. Many
solvents can degrade plastic parts to the point where they could fail. Such failure could cause serious
injury or property damage. See Technical Data on page 34 of this instruction manual and in all other
equipment manuals. Read fluid and solvent manufacturer’s warnings.

Moving Parts Hazard

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,

follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

Personal Protective Equipment

Wear appropriate protective equipment when operating, servicing or when in the operating area of this
equipment to help protect yourself from serious injury, including eye injury, inhalation of toxic fumes,
burns and hearing loss. This equipment includes, but is not limited to:

• protective eye wear

• clothing and respirator as recommended by fluid and solvent manufacturer

• hearing protection

•gloves

CALIFORNIA PROPOSITION 65

The engine exhaust from this product contains a chemical known to the State of California to cause
cancer, birth defects or other reproductive harm.

NOTICE

Water or material remaining in unit when temperatures are below freezing can damage pump and/or delay startup.
To insure water and material are completely drained out of unit:

• Remove hose from material outlet,

• Tip sprayer forward 45° to allow material (water) to flow out of pump inlet.

• Before adding material or starting unit in cold weather, circulate warm water through pump.

4 310645P

Component Identification

C

R

Component Identification

B

P

K

A

E

F

ti4500a

S

D

H

U

W

M

V

310645P 5

L

T

Component Identification

Component Identification

ITEM

A Main Power Switch

B Nozzle Storage

C Hopper

D Hopper Connect/Disconnect

E Graco RotoFlex™ HD Pump

F Material Outlet

H Air Outlet

K Fluid Flow Regulator and Pressure Gauge

L Gun Nozzle (5 sizes)

M Gun (see manual 310616)*

P Prime Switch

R Power Cord

S Pump Access Screw

T Hose - 25-ft.

COMPONENT

U Material Thickness Gauge

V Cleaning Ball

W Spare Hose Gaskets

6 310645P

Preparation

Preparation

Pressure Relief Procedure

1. Turn Main Power Switch
(A) OFF.

2. Turn fluid flow regulator
(K) all the way down to
reduce pressure.

3. Open gun air valve (aa).

4. Trigger gun, spray­ing material back
into hopper (C).

ti4303a

ti4000a

Grounding and Electric Requirements

The sprayer must be grounded. Grounding reduces the
risk of electrical shock by providing an escape wire for
the electrical current.

• The sprayer cord includes a

K

grounding wire with an appro­priate grounding prong.

• The plug must be plugged
into an outlet that is properly
installed and grounded in

A

accordance with all local
codes and ordinances.

• Do not modify plug! If it will
not fit in outlet, have
grounded outlet installed by a
qualified electrician.

Ground

ti4295a

ti4296a

• Sprayer model electric

ti4297a

requirements are provided on
page 2.

ti4294a

Extension Cords

• Only use an extension cord

Ground

with an undamaged 3-prong
plug.

• For up to 100 ft (30.48 m) cord,

use 3-wire, 12 AWG (2.5 mm

2

)

ti4295a

minimum.

310645P 7

Preparation

Auxiliary Air Compressor

• Use Auxiliary Air Hookup Kit 287328 when addi­tional atomization air is necessary.

NOTICE

Attaching auxiliary air to sprayer without using the
Auxiliary Air Hookup Kit will damage sprayer.

Generators

7500 W (7.5 KW) minimum.

Tips for Using Generators

• Before running sprayer, make sure it is at room tem­perature. This will reduce startup current.

• Run generator at full throttle.

Hose Lengths

• The system comes with a twin line hose set consist­ing of a 1 in. ID x 25 ft (25 mm x 7.6 m) material
hose and a 3/8 in. ID air hose. Additional hose sec­tions can be added. Total final length of hose used
should not exceed 100 feet in length.

NOTICE

Sprayer air hose fitting can get hot! Allow sprayer to
cool down 5 minutes before removing air hose.

8 310645P

Removing and Replacing Hopper, Front and Back Covers

Removing and Replacing Hopper, Front and Back
Covers

Before performing any service on sprayer
always:

• Read all warnings, page 3.

• Read operating instructions manual, page 2.

• Relieve Pressure, page 7.

• Turn main power switch (A) OFF.

• Unplug sprayer from outlet.

• Remove air and material hoses.

• Clean sprayer. See Operation Manual 310624 or

310625.

Hopper

Removing Hopper

1. To remove hop­per loosen fit­ting. Fittings are
hand-tightened
and should not
require tools to
loosen.

2. Lift hopper
straight up, off
frame.

Replacing Hopper

1. To replace hop­per, position
drain over fit­ting as far as it
will
go, making sure
identification
label faces out.

ti4503a

Front Cover

Removing Cover

1. Remove hopper.

2. Unscrew
and remove
knob (S).

3. Place you
hand under
front, bot­tom edge of
cover.
(3a) Lift
cover up,
(3b) then
pull bottom
toward you
and out to remove cover.

S

Replacing Cover

1. Place your
hand under
front, bottom
edge of
cover. (1a)
Position top
edge of
cover under
top metal lip
on sprayer
frame.
(1b) Then
push up on
cover so
lower plastic edge of cover has room to clear front
metal frame and slide cover into place. To position
cover correctly, it will go in at an angle.

S

3a

3b

1a

1b

ti4408a

ti4411a

2. Hand tighten fit­ting.

310645P 9

ti4504a

2. Replace knob (S). Hand tighten fitting.

3. Replace hopper.

Removing and Replacing Hopper, Front and Back Covers

Back Cover

To access the motor and all other components, it is nec­essary to remove the hopper, front and back covers.

Removing Cover

1. Completely
remove 6
screws (2 on
top and each
side) from
cover.

ti4430a

2. Lift cover up
and then tilt it
back and off
sprayer frame.

Replacing Cover

1. To reposition
cover on sprayer
frame, tip the
cover back,
toward you and
slide it down, into
place in the base
of the frame. Then
push the top back
into place. Align
screw holes in
side and top of
cover with holes in
frame.

2. Replace and
tighten screws.

ti4432a

ti4431a

ti4433a

10 310645P

RotoFlex™ HD Pump

RotoFlex™ HD Pump

Use RotoFlex HD Pump Replacement Kit 287314.

NOTE: After replacing RotoFlex HD Pump hose, always
follow Hose Break-In Procedure, page 13, before oper­ating sprayer.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper and front cover, page 9.

1. Loosen and remove
hose extension.

ti4377a

4. Rotate pump assem­bly sideways. Pull
entire assembly out of
front of sprayer frame.

ti4376a

5. Separate the inner and
outer hose brackets.

2. Loosen and remove
knob.

3. Slide RotoFlex HD
hose off rollers.

ti4374a

ti4378a

ti4519a

6. Slide hose ends out of
slots in outer hose
bracket (slide out of
short slot first).

7. Pull hose out of inner
hose bracket.

8. Discard pump hose.

ti4379a

310645P 11

RotoFlex™ HD Pump

Reassembly

1. Bend and kink new
pump hose from kit in
the middle as shown,
making sure dots on
hose fittings face each
other.

2. Insert hose ends
through holes in inner
hose bracket, keeping
dots on fittings facing
each other and kinked
portion of hose hori­zontal to the under­side of bracket.

alignment

holes

DOTS

5. Replace bracket
assembly in housing
making sure the
mounting screw
hole, located in the
top center of the
inner plate, faces up.

ti4383a

ti3127a

6. Slide pump hose
around rollers. Make
sure the rollers are
horizontally parallel
to each other.

ti4520a

7. Slide feet on the bot­tom of hose bracket, into
the slot on the bottom of
sprayer.

3. Slide hose ends into
outer hose bracket,
making sure dots on
fittings face each other
and alignment holes
are together (slide into
long slot first).

4. Slide plates together,
inserting inner plate in
outer plate, matching
alignment holes.

ti4386a

8. Replace knob. Hand
tighten.

9. Reattach hose extension.

10. Replace front cover and
hopper. See Removing
and Replacing Hopper,
Front and Back Cover,
page 9.

ti4429a

ti4381a

12 310645P

Hose Break-In Procedure

RotoFlex™ HD Pump

1. Make sure fluid flow regula­tor (K) is turned all the way
down.

2. Pour approxi­mately 1 gallon

hot

water in

sprayer hopper

WATER

to lubricate the
pump.

ti4303a

3. Turn power switch (A)
on.

K

4. Hold in prime switch
(P).

5. Turn fluid flow regula­tor (K) up to full pressure.

6. Run sprayer dry for 1 to

ti4301a

1-1/2 minutes.

ti4653a

P

ti4364a

K

ti4655a

310645P 13

Compressor and Motor Repair

Compressor and Motor Repair

For 120 V sprayer use Compressor and Motor Replace­ment Kit, 287315.

For 230 V sprayer use Compressor and Motor Replace­ment Kit, 287344.

Kits include motor/compressor and mounting hardware.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

1. Remove two screws and
access cover on the left
side of the motor.

4. Loosen 4 bolts (2 each
side) to loosen tension
on belt.

ti4388b

5. Slide belt off motor
pully.

ti4459a

6. Disconnect air line from
compressor to cooler
and remove.

2. Remove ground nut and
disconnect green ground
wire.

3. Disconnect black and
white wires to motor.

ti4457a

ti4405a

ti4460a

7. Remove 3 screws on
right side of cover and
remove cover.

ti4458a

ti4479a

ti4478a

14 310645P

Compressor and Motor Repair

8. Loosen 2 shoulder
bolts about 2-3 turns.
Do not remove them.

9. Remove single shoul­der bolt on other side
of motor completely.

10. Slide out motor
assembly.

ti4425a

ti4463a

Reassembly

1. Using two new shoulder
bolts and rubber mounts
included in your kit, insert
bolts into openings until
they start to snug up on
rubber mounts.

2. Slide new motor into
sprayer frame, aligning
motor frame opening
under bolts. Tighten
bolts.

3. Replace shoulder
bolt on left side with
new bolt from your
kit. Tighten bolt.

ti4465a

ti4468a

ti4462a

11. Completely remove
old shoulder bolts and
rubber mounts.

12. Thoroughly clean inside housing to remove dust
and debris.

ti4424a

4. Replace end cover.
Replace and tighten 3
screws.

ti4484a

ti4464a

ti4485a

5. Reattach air line to
cooler and compressor.
Tighten fitting.

6. Slide belt over pulleys
and set tension. See
Replacing Belt, page 19.

ti4516a

310645P 15

Compressor and Motor Repair

7. Reattach black and white
wires to motor.

NOTE: Wires are not polar­ity sensitive.

8. Replace reattach green
ground wire and grounding
nut.

ti4470a

ti4412a

9. Replace cover plate and
screws.

10. Replace RotoFlex HD
Pump and hose exten­sion, page 12.

11. Replace front and back
covers and hopper. See
Removing and Replac­ing Hopper, Front and
Back Cover, page 9.

ti4471a

16 310645P

Compressor Rebuild Kit

Compressor Rebuild Kit

To replace piston, seals and sleeve.

For 120 V sprayer use Compressor Rebuild Kit 287330.

For 230 V sprayer use Compressor Rebuild Kit 287331.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove back cover, page 9.

1. Disconnect air line to
motor.

ti4460a

2. Remove 3 screws in
side of motor cover.
Remove cover.

4. Remove 3/8 in. bolt
holding piston to
motor shaft.

ti4707a

5. Loosen 4 bolts on
top of motor hous­ing.

ti4708a

6. Remove bolts and
housing from
motor.

ti4479a

ti4709a

7. Remove piston rod

ti4478a

from motor.

8. Using parts in kit

3. Remove fan bolt from
center of fan and
remove fan from hous­ing.

ti4706a

310645P 17

replace piston,
seals and sleeve.

ti4710a

Compressor Rebuild Kit

Reassembly

1. Insert new piston rod
from kit in motor housing.

2. Replace and
tighten piston bolt.

3. Replace top motor
hosing and 4 bolts.

4. Tighten bolts.

ti4700a

ti4701a

5. Replace motor
fan and center fan
bolt.

6. Tighten bolt.

ti4704a

7. Replace motor
cover and
screws.

ti4485a

8. Reconnect air
line from motor to
cooler.

9. Replace back cover.
See Removing and
Replacing Hopper,
Front and Back
Cover, page 9.

ti4703a

18 310645P

Removing and Replacing Belt

Removing and Replacing Belt

Use Belt Replacement Kits 118845.

First read and follow instructions in the Before perform-
ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

Removing Belt

1. Loosen 4 bolts (2 each
side) to loosen tension on
belt.

ti4388b

2. Loosen 2 bolts (1 each
side) holding down sup­port rod.

ti4388a

3. Using a screw driver for
leverage, lift up on
motor support rod on
one side of motor and
ease it out of the hold­ing bracket far enough
to remove old belt. Dis­card old belt.

Replacing Belt

1. Using new belt from Kit,
position new belt
around pulleys making
sure the teeth in the
belt are properly
engaged with teeth on
pulleys.

2. Replace support rod.
Tighten 2 bolts (1 each
side) to secure support­ing rod.

3. Insert crow bar under
assembly as shown
and raise motor
assembly until desired
belt tension is
achieved.

4. While holding motor
assembly in place with
crow bar. Spin pulley to
assure proper belt
engagement. Adjust
motor assembly position
as necessary.

ti4392a

ti4393a

ti4469a

ti4472a

At the same time, slide

ti4391a

in the new belt.

ti4459a

310645P 19

Removing and Replacing Belt

NOTE: A correctly tensioned belt will feel very tight. To
measure correct tension apply 4-5 lbs pressure at belt
midpoint with thumb. Belt should have approximately
1/8 in (3.175 mm) deflection.

ti4477a

NOTE: A loose belt will not last long. If in doubt, tighten
more.

5. Tighten all 4 bolts.

6. Turn belt one more
time with your hand
to make sure teeth
are properly engaged
and tension is cor­rect.

7. Replace RotoFlex
HD Pump and hose
extension, page 12.

8. Replace back and

ti4473a

front covers and hop­per. See Removing and Replacing Hopper, Front
and Back Cover, page 9.

ti4394a

20 310645P

Roller Replacement

Roller Replacement

Use Roller Replacement Kit 287321.

Kit includes 2 rollers, 4 nylon washer, and 2 retaining
rings.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

1. Remove snap ring.

ti4396a

2. Remove roller assembly
from rotor pins (a).

Reassembly

1. Replace roller assembly.

2. Reinstall snap ring.

3. Replace RotoFlex HD
Pump and hose extension,
page 12.

4. Replace back and front
covers and hopper. See
Removing and Replacing
Hopper, Front and Back
Cover, page 9.

ti4398a

ti4399a

3. Clean rotor pins (a) and
check for damage. If
pins are worn or dam­aged, replace rotor
assembly, (Rotor
Assembly Replace­ment, page 22).

ti4397a

a

310645P 21

Rotor Assembly Replacement

Rotor Assembly Replacement

Use Pump Assembly Replacement Kit 287255.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

1. To prevent rotor assembly
from moving, insert a long
screw driver or pry bar in
the pulley.

ti4714a

2. Remove large bolt and
washer in center of rotor
assembly.

Reassembly

1. Put new rotor assembly from kit on shaft.

2. Insert a wrench in the
pulley to prevent it from
moving.

3. Replace bolt. Torque to
40 ft. lb.

4. Replace RotoFlex HD
Pump and hose extension,
page 12.

5. Replace back and front
covers and hopper. See
Removing and Replacing
Hopper, Front and Back
Cover, page 9.

ti4712a

ti4714a

3. Pull rotor assembly off
shaft.

ti4711a

22 310645P

Air Cylinder and Solenoid Valve

Air Cylinder and Solenoid Valve

Use Cylinder Replacement Kit, 287323.

For 120 V sprayer use Solenoid Replacement Kit
15D560.

For 230V sprayer use Solenoid Replacement Kit

287351.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

1. Remove hose from quick
release fitting by using your
fingers on one hand to push
in on ring while at the same
time, using the other hand,
gently pull the hose out of
the fitting.

2. Remove electric wire ter­minal connections.

3. Remove cotter key
located on the end of the cyl­inder pin, by using a pliers to
straighten the ends and pull
it out of the hole.

ti4406a

ti4416a

4. Gently push cylinder
forward, relieving
tension on pin. Pull
out pin.

ti4409a

NOTE: If replacing solenoid valve only, it can be
done at this time.

a. Use adjustable wrench to rotate entire

solenoid valve assembly counterclockwise from
cylinder.

b. Replace solenoid valve and continue with step 4

of reassembly.

5. Lift cylinder up and pull it
back.

6. Remove dampening
grommet.

ti4518a

7. Using a 15/16 in.
wrench, loosen nut,
located inside sprayer
frame at the end of the

ti4415a

air cylinder.

8. Using a 15/16 in. wrench,
loosen nut on the other
side of the sprayer
frame.

9. Pull cylinder out of
sprayer frame.

If replacing cylinder only,
remove solenoid valve
(see a and b above) and
reinstall on new cylinder.

ti4453a

ti4414a

310645P 23

Air Cylinder and Solenoid Valve

Reassembly

1. Insert crowned backing
nut on shaft of cylinder.

2. Using new cylinder from
kit, position cylinder in
sprayer frame, inserting
end of cylinder through
pump bracket mounting
hole.

3. Install locking nut flush to end of shaft.

4. Install dampening grommet.

5. Align hole in end of air cyl­inder and replace pin.

ti4410a

6. Replace cotter pin
through hole in pin,
bending ends to
secure.

ti4421a

ti4456a

7. Reattach electric wire
terminals. Terminals are
not polarity sensitive

ti4417a

and can be connected to
either post.

8. Gently push hose in
quick release fitting.

9. Replace RotoFlex HD
Pump and hose
extension, page 12.

ti4407a

10. Replace front cover
and hopper. See
Removing and Replacing Hopper, Front and Back
Cover, page 9.

ti4455a

24 310645P

Relief Valve and Flow Sensor Manifold

Relief Valve and Flow Sensor Manifold

For 120 V sprayer use Relief Valve Replacement Kit
15D559.

For 230 V sprayer use Relief Valve Replacement Kit

287350.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

1. Remove air line to
regulator.

2. Remove air line from
cooler to manifold.

3. Disconnect wires to
Relief Valve. Pay attention to their location to insure
they are reattached correctly.

4. Remove 2 nuts secur­ing Relief Valve to
sprayer.

ti4423a

5. Remove Relief Valve
from sprayer frame.

ti4419a

Reassembly

1. Position new relief valve from Kit in back of sprayer.

2. Replace and tighten screws.

3. Reattach wires to Relief Valve.

4. Reattach air line from cooler to manifold.

5. Reattach air line to regulator.Replace RotoFlex HD
Pump and hose extension, page 12.

6. Replace front cover and hopper. See Removing and
Replacing Hopper, Front and Back Cover, page 9.

ti4418a

310645P 25

Air Flow Sensor Replacement

Air Flow Sensor Replacement

For 120 V sprayer use Sensor Replacement Kit 287326.

For 230 V sprayer use Sensor Replacement Kit 287345.

NOTE: If you are just replacing the sensor, you do not
have to remove the motor first.

Disassembly

First read and follow instructions in the Before perform­ing any service on sprayer section, page 9.

Then remove hopper, front and back covers, page 9.

Remove hose extension and RotoFlex HD Pump
assembly from frame, page 11.

1. Disconnect all
wire connec­tions.

ti4481a

ti4482a

2. Rotate counter-clockwise
to remove sensor from
manifold.

Reassembly

1. Rotate new sensor
from kit clockwise, all
the way into opening in
Relief Valve housing.
Lightly tighten nut.

2. Reconnect all wires.

3. Replace RotoFlex HD
Pump and hose
extension, page 12.

4. Replace back and
front covers and hop­per. See Removing
and Replacing Hop­per, Front and Back
Cover, page 9.

ti4480a

ti4486a

ti4487a

ti4488a

WHITE WIRE

26 310645P

WHITE WIRE

Troubleshooting

Problem Cause Solution

Troubleshooting

Sprayer won’t run or stops intermit­tently

Pump won’t pump material or low
output

Power switch not on Turn switch on.

No power at wall outlet Check outlet by plugging in another

appliance. If appliance does not
work, try another outlet.

Wrong size generator Use a 7500 watt or larger generator.

Refer to Generator Requirements,
page 8.

Temperature too cold Allow unit to warm up.

Too many items on same circuit Unplug other items from circuit.

Internal thermal switch tripped Self-resetting. Allow unit to cool down

15 minutes and restart. Usually
occurs when wrong size extension
cord is used.

Extension cord too long or wrong
gauge

Breaker tripped Reset breaker.

Air lock Open air valve on gun.

Mix too thick Add water to thin material. Use Mate-

Loose fittings Check and retighten all fittings.

Plugged gun Relieve Pressure, page 7. Remove

RotoFlex HD Pump worn out Replace hose.

Pump cold or material frozen in pump Move pump to warm room and allow

Sensor is bad Replace, page 26

Check air system for leaks Remove shroud and examine for air

Loose wire Remove shroud and examine wiring

No air pressure Rebuild compressor

Use a 12 gage extension cord or
remove extension cord. Refer to
Grounding and Electric Require­ments, page 7.

rial Thickness Gauge.

gun from hose. Clean gun.

it to warm up or run hot water through
sprayer.

leaks

310645P 27

Troubleshooting

Problem Cause Solution

Soft start won’t work/pump, always
loaded

Sensor is bad Change sensor, page 26

Air leak due to bad seal keeps valve

Replace seal

open

Normal soft start system delay Release trigger for 10-15 seconds.

Retry.

Switch is not operating properly Replace switch

Damaged solenoid valve on cylinder Check gun supply, hose and sprayer

AIr leak

for leaks

Material runs out of bottom of sprayer RotoFlex HD Pump worn out Replace hose.

Loose fittings Check and retighten all fittings.

No air from compressor Gun air valve closed Open gun air valve.

Gun needle plugged Clean needle and retry.

Lines not connected Check all quick disconnect connec-

tions to gun and hoses.

Damaged hose Replace hose.

Worn compressor Service compressor. Contact a quali-

fied Graco Service Center.

Speed of application too slow Material too thick Thin material.

Nozzle too small Change nozzles to a larger size. See

Operation Manual, Recommended
Nozzle Selection Chart, page 20.

Speed of application too slow (cont.) Flow control set too low Increase flow control setting

Plugged or dirty gun Relieve Pressure, page 7. Clean

gun.

Kinked hose Unkink hose.

Gun fluid flow adjustment set too low Increase flow adjustment with flow

adjustment nut.

Intermittent flow/sputtering or air in
material

Air quick disconnect does not stay
connected.

Hopper connection not tight Check gasket. TIghten connection.

Debris in system Clean

Dirty or corroded fitting Clean thoroughly. Soak in oil. Apply a

few drops of light oil.

Gun will not shut off Worn nozzle or needle. Relieve Pressure, page 7. Replace

worn parts.

Debris in needle passage Relieve Pressure, page 7. Clean.

Fluid leaking at Flow Adjustment Nut Damaged seal. Relieve Pressure, page 7. Replace

seal.

Needle adjustment won’t adjust Dirty threads Clean threads

Nozzle not on gun Put nozzle on gun

Flow nut set to maximum adjustment Turn flow nut adjustment the other

way

28 310645P

Air Diagram

Air Diagram

Air Cylinder

Air Compressor

Regulator

Guage

One Way Valve

Wiring Diagram

Air Cylinder

Air Cooler

Air Flow Control

Air Compressor

Gun

One Way Valve

ti4369a

39

51

32

Prime
Switch

Power
Switch

Air Flow

50

310645P 29

Control

50

150/151

Green

White

Black

8

50

ti4370d

Parts

Parts

22

102

49B

49C

1949A

34

1D

1A

42

52

1B

49

31

53

57

36

45

1E

9

52

38A

73

21

1B

40

94333

62

38

63

88

38B

37

41

101

55

13

62

88

63

4

56

67

30 310645P

Parts List

Parts List

Ref. Part Description

1 287315 KIT, compressor replacement

(includes 1A and 1B-1E),
120V sprayers

287330 KIT, compressor rebuild,

120V sprayers

287344 KIT, compressor replacement

(includes 1A, and 1B-1D),
230V sprayers

287331 KIT, compressor rebuild,

230V sprayers
1A 119872 SCREW, shoulder
1B 118886 GROMMET, isolator
1D 119381 COVER, terminal
1E 121479 CAPACITOR, start
4 118845 BELT
9 117728 FITTING, compression, union
13 15D156 PULLEY, rotor
16 118888 HOSE, air (includes 1/4 in. tubing

and one-way valve)
19 15D862 NUT, hand
21 118876 TUBE, air, aluminum
22 117637 NUT, compression
31 112395 SCREW, cap
32 15D633 WIRE, jumper
33 103473 STRAP, tie, wire
34 15B815 COOLER
36 101242 RING, retaining, ext.
37 287255 ROTOR, pump, assbly

(includes 38, 38A, 38B)
38 287321 KIT, roller replacement

(includes 38A, 38B and two roll-

ers)
38A 113983 RING, retaining, ext
38B 117726 WASHER, nylon
39 15D628 CONDUCTOR, ground

Qty

Ref. Part Description

.

40 103785 RIVET

1

41 287327 KIT, repair, shaft, bracket, pump

assbly.
42 287256 BRACKET, compressor
43 118869 TUBE
45 15D610 SHAFT, motor, mount
49 287346 SHIELD, rear, assbly

(includes 19, 49A, 49B, 49C)
49A 15D561 COVER, tool tray
49B▲ 15D939 LABEL, warning, English, French,

3
3
1
1

49C▲ 15D940 LABEL, identification

1

51 15D634 WIRE, jumper

2

52 116937 BEARING, flanged, bronze

1

53 117633 SCREW, slot hex wash hd

1

54 116666 TUBE, air
55 287304 HOSE SET, twin line, 1 in. x 25-ft

1

56 15C090 GAUGE, thickness, fluid

1

57 183401 KEY, parallel

1

58 116720 COUPLER, air, quick disconnect

4

62 108851 WASHER, plain

1

63 106276 SCREW, cap, hex head

2

67 248515 BALL, sponge, 30 mm (5 pk)

1

73 112785 SCREW, flanged, hex head

2

74 115498 SCREW, mach, slot, hex, wash hd

1

82 118887 HOSE, air (includes 1/4 in. tubing

2

88 118866 WASHER, flat
101 248091 GUN, non-bleeder
102 122104 VALVE PLATE, compressor

2
4

▲ Replacement Danger and Warning labels, tags and

1

287336 KIT, label, warning, all languages

cards are available at no cost.

Spanish

except those included in 15D939

and one-way valve)

Qty

.

2
1

1
1
1
1

1

1
2
8
1
1
1
2
1
2
2
2
2
1
1

1
1
1

310645P 31

Parts

Parts

18

24

90

25

26

93

29

27

81

66

154

91

A

30

92

12

17

6

3

7

10

70

71

35

ti4372C

93

55

93

19

28

153

151

23

14

58

83

20

59

60

77

8

72

5B

89

5A

5

15

A

150a

150b 150c152a 152c 152d152b 152e

32 310645P

Parts List

Parts List

Ref. Part Description

3 118844 REGULATOR, air, 1/8 in. NPT
5 287323 KIT, cylinder, replacement,

(includes 5A, 5B, 89)
5A 15D576 SPACER, crowned
5B 118871 NUT, lock, 1/2-20
6 117720 GAUGE, pressure
7 115244 NUT, regulator
8▲ 186620 LABEL, ground, symbol
10 117693 SWITCH, power
12 119064 SWITCH, power, prime
14 15D559 VALVE, assembly, 120V (includes

sensor) sprayer

287350 VALVE, assembly, 230V (includes

sensor) sprayer
15 15D560 VALVE, cylinder, 120V sprayer

287351 VALVE, cylinder, 230V sprayer

16 118888 HOSE, air (includes 1/4 in. tubing

and one-way valve)
17 15C968 TUBE, air
18 287347 HOPPER, texture (includes

bracket)
19 15D862 NUT, hand
20 287326 KIT, sensor only, 120V

287345 KIT, sensor only, 230V
23 287348 SHIELD, front (includes 28)
24 108471 KNOB, pronged
25 15D589 BRACKET, hose, outer
26 15D588 BRACKET, hose, inner
27 287314 KIT, RotoFlex HD Pump
28▲ 189286 LABEL, warning
29 118885 HOSE, coupled (includes grom-

met)
30 287254 FRAME, texture, blue
32 15D633 WIRE, jumper
35 116478 WHEEL, pneumatic
49B▲ 15D939 LABEL, warning, English, French,

Spanish

287336 KIT, label, warning, all languages

except those included in 15D939

Qty

Ref. Part Description

.

49C▲ 15D940 LABEL, identification

1

51 15D634 WIRE, jumper

1

54 116666 TUBE, air

1

55 287304 HOSE SET, twin line, 1 in. x 25-ft

1

58 116720 COUPLER, air, quick disconnect

1

59 104641 FITTING, bulkhead

1

60 116658 FITTING, tube, male, 1/4 NPT

1

66 116171 BUSHING, strain relief

1

70 116411 SPRING, compression

1

71 116477 WASHER, flat, nylon

1

72 101242 CAP, end
74 115498 SCREW, mach, slot, hex, wash hd
77 102040 NUT, lock, hex
81▲ 198492 LABEL, warning

1

82 118887 HOSE, air (includes 1/4 in. tubing

1
1

83▲ 15D089 LABEL, warning, hot surface
89 801012 GROMMET

1

90▲ 15D951 LABEL, identification

1

91▲ 15D953 LABEL, identification
92▲ 15D952 LABEL, identification

1

93 118872 GASKET

1

150 CORD, power
150a 15D630 Americas/Canada, 120V, 60 Hz

1

150b 15E056 Europe/Asia, 230V, 50 Hz

1
1

150c 15E061 United Kingdom, 110V, 60, Hz

1

151 15D902 CORD, power, Europe/Austra-

1
1
1

152 ADAPTER, cordset, (for 15D902),
152a 242001 Europe

1

152b,c,d 287121 Italy, Denmark, Switzerland

1

152e 242005 Australia/China

2

153 195551 RETAINER, (for 15D902)
154 15F966 BAFFLE, hopper

and one-way valve)

(hardwired, rubber cord)

lia/China, 230V, 50 Hz (requires
cordset adapter, 152, following)

Qty

.

1
1
1
1
1
1
1
2
2
4
1
2
2
1

1
1
1
1
1
4

1
1

1
1

1
1
1
1
1

310645P 33

Technical Data

Technical Data

Maximum working fluid pressure 100 psi (6.9 bar)

Maximum working air pressure 45 psi (3.1 bar)

Material pressure operating range 0-100 psi (0 to 6.9 bar)

Compressor

Type Oilless

Air delivery 6.5 CFM @ 40 psi (184.1 lpm @ 2.8 bar)

Motor

Hopper capacity 15 US gallons (57 liters)

Maximum delivery with texture material 2.0 gpm (7.57 lpm)

Dimensions

Length 27 in. (685.8 mm) with handles

Width 26 in. (660.4 mm)

Height 40 in. (1016 mm)

Weight

With hoses and gun 147 lb (66.68 kg)

Without hoses and gun 131 lb (59.47 kg)

Wetted parts PVC, Buna-N, anodized aluminum, powder coat

Sound data

Sound pressure level* 85.8 db(A)

Sound power level# 100.1 db(A)

Generator (minimum size requirement) 7500W (7.5 kW)

Maximum external working air pressure (must use

External Air Hookup Kit 287328 ONLY)

120V, 60 Hz 15A

230V, 50 Hz 10A

aluminum, brass, polyethylene, SST, UHMW

120 psi (8.3 bar)

*Measured while spraying at 1 m.
#Measured per ISO-3744

34 310645P

Notes

Notes

310645P 35

Graco Standard Warranty

Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.

This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.

THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.

Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.

GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to

the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.

FOR GRACO CANADA CUSTOMERS

The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.

Graco Information

For the latest information about Graco products, visit www.graco.com.

TO PLACE AN ORDER, contact your Graco distributor or call 1-800-690-2894 to identify the nearest distributor.

All written and visual data contained in this document reflects the latest product information available at the time of publication.

GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA

Copyright 2004, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.

Graco reserves the right to make changes at any time without notice.

For patent information, see www.graco.com/patents.

Original instructions. This manual contains English. MM 310645

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

www.graco.com

Revised March 2014