Graco 248650 Use and care manual

- For Water-Based Materials Only -
(Consult your Material Supplier for Warnings and Application Requirements)
Model: 248650
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 (model
248903) only. All other guns will damage sprayer.
ti4500b
310717E
Repair and Parts
TexFinish™ 1500 Rental Sprayer

Warnings
2310717E
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.
Warning
Caution
WARNING
This symbol alerts you to the possibility of seri-
ous injury or death if you do not follow the
instructions.
CAUTION
Alerts you to the possibility of damage or destruction
of equipment if you do not follow the instructions.
Warnings
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 all 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.
• Keep a fire extinguisher in the work area.
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 kink or over bend hoses or use hoses to pull equipment.‘
•Keep children and animals away from work area.
• 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.

Warnings
310717E 3
Warnings
Pressurized Equipment Hazard
Compressed air can inject in skin. Air tubing rupture can cause injury if disconnected while under pres-
sure. To reduce risk of injury:
• Never exceed maximum working pressure of any attachment.
• Do not direct airstream at body.
• Follow Pressure Relief Procedure, page 6 whenever you are instructed to relieve pressure, stop
spraying, service equipment, install or clean spray nozzle or disconnect or connect hose.
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 33 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
CAUTION
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.

Component Identification
4310717E
Component Identification
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4
5
3
2
6
7
8
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Component Identification
310717E 5
Component Identification
ITEM COMPONENT
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)*
PPrimeSwitch
RPowerCord
S Pump Access Screw
T Hose - 25-ft.
U Material Thickness Gauge
V Cleaning Ball
W Spare Hose Gaskets
XHourMeter

Preparation
6310717E
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, spray-
ing material back into
hopper (C).
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
grounding wire with an appro-
priate grounding prong.
• The plug must be plugged
into an outlet that is properly
installed and grounded in
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.
• Sprayer electric requirements
are provided on page 6.
Extension Cords
• Only use an extension cord
with an undamaged 3-prong
plug.
• For up to 100 ft (30.48 m)
cord, use 3-wire, 12 AWG
(2.5 mm2) minimum.
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'ROUND
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'ROUND
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Hour Meter
310717E 7
Auxiliary Air Compressor
• Use Auxiliary Air Hookup Kit 287328 when addi-
tional atomization air is necessary.
Generators
7500 W (7.5 KW) minimum.
Tips for Using Generators
• Before running sprayer, make sure it is at room tem-
perature. This will reduce startup current.
• Run generator at full throttle.
Hose Lengths
• The system comes with a twin line hose set consist-
ing 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 sec-
tions can be added. Total final length of hose used
should not exceed 100 feet in length.
Hour Meter
The TexFinish Sprayer is equipped with a SenDEC Hour
Meter to monitor the number of hours the sprayer has
been used. After 40 hours the display will flash. This
flashing is your reminder to change the RotoFlex HD
Pump hose.
After you have replaced the RotoFlex HD Pump hose,
reset the hour meter using the reset key or a magnet.
CAUTION
Attaching auxiliary air to sprayer without using the Auxil-
iary Air Hookup Kit will damage sprayer. CAUTION
Sprayer air hose fitting can get hot! Allow sprayer to
cool down 5 minutes before removing air hose.
Reset

Removing and Replacing Hopper, Front and Back Covers
8310717E
Removing and Replacing Hopper, Front and Back
Covers
Before performing any service on sprayer
always:
• Read all warnings, page 2.
• Read operating instructions manual 310716.
•Relieve Pressure, page 6.
• 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 hop-
per loosen fit-
ting. Fittings are
hand-tightened
and should not
require tools to
loosen.
2. Lift hopper
straight up, off
frame.
Replacing Hopper
1. To replace hop-
per, position
drain over fitting
as far as it will
go, making sure
identification
label faces out.
2. Hand tighten fit-
ting.
Front Cover
Removing Cover
1. Remove hopper.
2. Unscrew
and remove
knob (S).
3. Place you
hand under
front, bot-
tom edge of
cover.
(3a) Lift
cover up,
(3b) then
pull bottom
toward you
and out to remove cover.
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.
2. Replace knob (S). Hand tighten fitting.
3. Replace hopper.
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S
3a
3b
ti4408a
ti4411a
S
1a
1b
ti4411a
ti4503a

Removing and Replacing Hopper, Front and Back Covers
310717E 9
Back Cover
To access the motor and all other components, it is nec-
essary to remove the hopper, front and back covers.
Removing Cover
1. Completely
remove 6
screws (2 on
top and each
side) from
cover.
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.
ti4430a
ti4431a
ti4432a
ti4432a

RotoFlex™ HD Pump
10 310717E
RotoFlex™ HD Pump
Use RotoFlex HD Pump Replacement Kit 287314.
Disassembly
First read and follow instructions in the Before perform-
ing any service on sprayer section, page 8. Then
remove hopper and front cover, page 8.
1. Loosen and remove
hose extension.
2. Loosen and remove
knob.
3. Slide RotoFlex HD hose
off rollers.
4. Rotate pump assem-
bly sideways. Pull
entire assembly out of
front of sprayer frame.
5. Separate the inner
and outer hose brackets.
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.
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ti4378a
ti4374a
ti4519a
ti4376a
ti4379a
IMPORTANT
• After replacing RotoFlex HD Pump hose,
always follow Hose Break-In Procedure, page
12, before operating sprayer.

RotoFlex™ HD Pump
310717E 11
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 hori-
zontal to the under-
side of bracket.
3. Slide hose ends into
outer hose bracket,
making sure dots on
fittings face each other
and alignment holes
are together.
4. Slide into long slot
first.
5. Slide plates together,
inserting inner plate in
outer plate, matching
alignment holes.
6. Replace bracket
assembly in housing
making sure the
mounting screw hole,
located in the top
center of the inner
plate, faces up.
7. Slide pump hose
around rollers. Make
sure the rollers are
horizontally parallel
to each other.
8. Slide feet on the bot-
tom of hose bracket,
into the slot on the
bottom of sprayer.
Note: Both plate bot-
toms must slide into
slot.
9. Replace knob. Hand
tighten.
10. Reattach hose exten-
sion.
11. Replace front cover
and hopper. See
Removing and
Replacing Hopper,
Front and Back
Cover, page 8.
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alignment
holes
ti4386a
ti4383a
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ti4429a
ti4381a

RotoFlex™ HD Pump
12 310717E
Hose Break-In Procedure
1. Make sure fluid flow
regulator (K) is turned
all the way down.
2. Pour approximately 1
gallon hot water in
sprayer hopper to
lubricate the pump.
3. Turn power switch (A)
on.
4. Hold in prime switch
(P).
5. Turn fluid flow regula-
tor (K) up to full pres-
sure.
6. Run sprayer dry for 1
to 1-1/2 minutes.
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Compressor and Motor Repair
310717E 13
Compressor and Motor Repair
For 120 V sprayer use Compressor and Motor Replace-
ment Kit, 287315.
Kits include motor/compressor and mounting hardware.
Disassembly
First read and follow instructions in the Before perform-
ing any service on sprayer section, page 8.
Then remove hopper, front and back covers, page 8.
Remove hose extension and RotoFlex HD Pump
assembly from frame, page 10.
1. Remove two screws and
access cover on the left
side of the motor.
2. Remove ground nut and
disconnect green ground
wire.
3. Disconnect black and
white wires to motor.
4. Loosen 4 bolts (2 each
side) to loosen tension
on belt.
5. Slide belt off motor pully.
6. Disconnect air line from
compressor to cooler
and remove.
7. Remove 3 screws on
right side of cover and
remove cover.
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ti4388a
ti4459a
ti4460a
ti4479a
ti4478a

Compressor and Motor Repair
14 310717E
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.
11. Completely remove
old shoulder bolts
and rubber mounts.
12. Thoroughly clean
inside housing to remove dust and
debris.
ti4463a
ti4425a
ti4462a
ti4464a

Compressor and Motor Repair
310717E 15
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.
4. Replace end cover.
Replace and tighten 3
screws.
5. Reattach air line to cooler
and compressor. Tighten
fitting.
6. Slide belt over pulleys
and set tension. See
Replacing Belt, page 18.
7. Reattach black and white
wires to motor.
8. Replace reattach green
ground wire and ground-
ing nut.
9. Replace cover plate and
screws.
10. Replace RotoFlex HD
Pump and hose exten-
sion, page 11.
11. Replace front and back
covers and hopper. See
Removing and Replac-
ing Hopper, Front and
Back Cover, page 8.
ti4465a
ti4468a
ti4424a
ti4485a
ti4484a
Wires are not polarity
sensitive.
ti4516a
ti4412a
ti4470a
ti4471a

Compressor Rebuild Kit
16 310717E
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 ser-
vice on sprayer section, page 8. Then remove back cover, page 8.
1. Disconnect air line to
motor.
2. Remove 3 screws in
side of motor cover.
Remove cover.
3. Remove fan bolt from
center of fan and remove
fan from housing.
4. Remove 3/8 in. bolt hold-
ing piston to motor shaft.
5. Loosen 4 bolts on top of
motor housing.
6. Remove bolts and housing
from motor.
7. Remove piston rod from
motor.
8. Using parts in kit replace
piston, seals and sleeve.
ti4460a
ti4479a
ti4478a
ti4706a
ti4707a
ti4708a
ti4709a
ti4710a

Compressor Rebuild Kit
310717E 17
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.
5 Replace motor fan and
center fan bolt.
6 Tighten bolt.
7 Replace motor
cover and screws.
8 Reconnect air line
from motor to
cooler.
9 Replace back
cover. See
Removing and
Replacing Hopper,
Front and Back
Cover, page 8.
ti4700a
ti4701a
ti4703a
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ti4485a

Removing and Replacing Belt
18 310717E
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 8.
Then remove hopper, front and back covers, page 8.
Remove hose extension and RotoFlex HD Pump
assembly from frame, page 10.
Removing Belt
1. Loosen 4 bolts (2 each
side) to loosen tension
on belt.
2. Loosen 2 bolts (1 each
side) holding down sup-
port rod.
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.
At the same time, slide in
the new 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 pul-
leys.
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.
ti4388a
ti4388b
ti4391a
ti4392a
ti4393a
ti4469a
ti4472a
ti4459a

Removing and Replacing Belt
310717E 19
5. Tighten all 4 bolts.
6. Turn belt one more
time with your hand
to make sure teeth
are properly engaged
and tension is cor-
rect.
7. Replace RotoFlex
HD Pump and hose
extension, page 11.
8. Replace back and
front covers and hop-
per. See Removing and Replacing Hopper, Front
and Back Cover, page 8.
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.
A loose belt will not last long. If in doubt, tighten
more.
ti4477a
ti4394a
ti4473a

Roller Replacement
20 310717E
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 perform-
ing any service on sprayer section, page 8.
Then remove hopper, front and back covers, page 8.
Remove hose extension and RotoFlex HD Pump
assembly from frame, page 10.
1. Remove snap ring.
2. Remove roller assem-
bly from rotor pins (a).
3. Clean rotor pins (a) and
check for damage. If
pins are worn or dam-
aged, replace rotor
assembly, (Rotor
Assembly Replace-
ment, page 21.
Reassembly
1. Replace roller assem-
bly.
2. Reinstall snap ring.
3. Replace RotoFlex HD
Pump and hose exten-
sion, page 11.
4. Replace back and front
covers and hopper. See
Removing and Replac-
ing Hopper, Front and Back Cover, page 8.
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a
ti4397a
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