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This manual contains IMPORTANT
WARNINGS and INSTRUCTIONS
REA0 AND RETAIN FOR REFERENCE
How To Use Your
New E M 380 Sprayer
Model 217-380.50 Hz
256opsi (172 bad MAXIMUM WORKING PRESSURE
G W C O INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440
@
COPYRIGHT 1981 GRACO INC.
Rev. A
HIGH PRESSURE SPRAY CAN CAUSE SERIOUS INJURY.
FOR PROFESSIONAL USE ONLY.
OBSERVE ALL WARNINGS.
Read and understand
all instruction manuals before operating equipment.
INJECTION HAZARD
SPRAY GUN SAFETY
Fluids under high pressure from spray or leaks can
penetrate the skin andcause extremely serious injury,
including theneed for amputation.
When spraygun is not actually spraying, always set the
gun safety latchin the closed or"SAFE" position, making the trigger inoperative.
N N € R point the spray gun at anyone or anypan of the
body.
DO NOT REMOVEOR MODIFY any partof the gun.
Check diffuser operation by usingthe lowest possible
spray pressurewith spray tip removed. Trigger gun and
maintain firm metal to metal contact between gun
and
metal waste container. Fluid emitted should be diffused
into an irregular stream.
N N E R put hand or fingers over the spray tip.
N N E R try to stop or deflect leaks with your hand or
body.
ALWAYS have the tip guard in place when spraying.
CHECK OPERATION OF ALL GUN SAFETY
DEVICES BEFORE EACH USE.
MEDICAL TREATMENT
Always remove the tip from the gunto clean it.
If any fluid appears to penetrate your skin, get
Be very careful when removing spray
the tip or hose
from gun. A plugged line contains
fluid under pressure.
If tip or line is plugged, open the drain valve, then
loosen tir, guard or hose couDling slight&
and relievethe
pressure slowly before removing
completely.
EMERGENCY MEDICAL CARE AT ONCE.
DO NOT TREAT AS A SIMPLE CUT.
Tell the doctor exactlv what fluid was iniected. For
treatment instructionshave your doctorC
a
ilthe
"
NATIONAL POISONCENTER NETWORK
SYSTEM PRESSURE
This unit develops 2500 psi (172 bar) fluid pressure at
unit. Before eachuse, check entire hose for cuts, leaks,
100 cycles per minute. Always be sure that all com- abrasion or bulging
of cover or damageof movement of
couplings. If any of these conditions exist, replace the
ponents have a maximum working pressure rating at
least as high. hose immediately.
Never use tape or any device to attempt to mend the hose.
N N E R leave a pressurized unit unattended.
Do not use chemicals or agentsin the hose which are
not compatible with nylon tube and urethane coverof
DO NOT ABUSE HOSE Improper use or handling of
hose could resuk in hose failure and Dossible Dersonal
the hose.
injury or propeny damage.
'
'
Handle androute hose carefullyto avoid kinking, abrasion, cutting or exDosure to temDeratures above 180°F
( 8 2 O C ) or below -4i)oF( - 4 O O C ) . Do not use hose to pull
NEVER ATTEMPT TO RECOUPLE THE HOSE1
Tiahten all fluid connections securely before each
use.
1
PREVENT STATIC SPARKING
Always be sureall equipment and objects being sprayed
are properly grounded. The high velocityflow of fluid
creates static electricity.
Never exceed 500 ft (150 m) overall combined hose
length.
Sparks may causefire or explosion.
where you are spraying. If you use an extension cord, it
must have 3 wires of at least 12 gauge (2.5 mm2) and
should not be over 100 ft (30.3 m) long.
Use only conductiveor groundedfluid hoses for airless
applications. Be sure that gun is grounded through hose
connections.
Once each week, check electrical resistance of hose
(when using multiple hose assemblies, check overall
resistance). Overall (end to end1 resistance of unpressurized hosemust not exceed 29 megohms (max.)
for any coupled length or combination
of hose lengths.
If hose exceeds theselimits, replace it immediately,
2
307-463
Plug into an outlet at least 20 ft (6m) from thearea
When flushing equipment, remove spray tip, use the
lowest possible pressure, and maintain firm metal to
metal contact between gun
and metal waste container.
This reduces the chance of static sparking.
Follow the coating and solvent manufacturer's safety
precautions and warnings.
KEEP CLEAR OF MOVING PARTS
USE EXTREME CARE WHEN SERVICING
The electricmotor has anoverheating protection device Before removing any
part for cleaning or servicing,
which automatically restarts the motor when
it cools. always disconnect power source and carefully relieve
So, before examiningor working on amotor which has
fluid pressure by triggering spray gun, engagingtrigger
safety and any other equipment safety locks, and openstopped, shut off the unit, relieve pressure andpull out
the electrical plug. This will avoid the hazard of the ing
any drain or bleeder valves. Leavedrain valve open
motor startingunexpectedly.
during servicing. Remove tip from gun for cleaning.
KEEP CLEAR of moving parts when
unit is running; do
not put your fingers into any openings in shield.
ALWAYS CHECK to be sureswitch is OFF and all lines
are clear of moving partsbefore plugging in the power
cord.
ALWAYS unplug unit before removing gearbox cover
for any reason.
Basic' E M 380 Components
E
G
B
A. Pump
B. Suction tube forpaint with strainer
C. Filter with drain valve
D. ON/OFF switch
E. Paint pressure control
F. Electric motor
G. Power supply cord
H. Carrying handle
1. Spray Gun
J. Reverse-A-Clean 111
307463
3
Preparation For Use
Connect Hose and Gun
Remove the plastic cap plug from the filter
and
screw the 50 ft (15 m) fluid hose into the 1/4
npsmlf) filter outlet. Then connect the whip
end hosebetween thefluid hose and the gun's
inlet connection. Don't use thread sealant,
and don't install thespray tip yet!
CAUTION
Always use a t least 50 ft (15 m) of fluid
hose. Never usemetal braid hose.
Fill Packing NutANetCup
Pour GracoThroat Seal Liquid (TSL), supplied
with the sprayer, into the packing nut/wet cup
until it's1/3 full. Keep the wet cup fullto help
protect and prolong the life of the pump's
throat packings.
PACKING NUT/
Check Electrical Service and Plug
In
Before plugging in the sprayer, be sure the
electrical service is 220 V, 50 HzAC, 15AMP.
This unit has no plugbecause of varying electrical codes in various parts ofthe world. Have
a licensed electrician installa plug conforming
to local code. With the ON-OFF switch in the
OFF position, plug the power supply cord into
a grounded outlet.
Set Pressure Control
Turn the pressure control knobto the lowest
setting.
Flushing Pump
4
30743
An important part of the care and
maintenance of your EM 380 is proper
flushing. See "Flushing Guidelines" on page 5
for "When to Flush" and "How to Flush".
Flushing Guidelines
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. N e w unit. Your new EM 380 was factory
tested in No. 10 motor oil and the oilwas
left init to protect the parts.
Before Using Water-Based Paint,flush out
the oil with mineral spirits, then flush out
the mineral spiritswith soapy water followed by a clean water rinse.
Before Using Oil-Based Paint,
flush out the
oil withmineral spirits only.
4. Changing from Oil-Based t o WaterBased Paint. Flush with mineral spirits,
then soapy water, followed by a clean
water rinse.
5. Storage
Water-Based Paint:flush with water, then
mineral spirits and leave the pump, hose
and gun filled with mineral spirits.
Oil-Based Paint; flush with mineral spirits
and leave the pump, hose and gun filled
with mineral spirits.
2. Changing colors. Flush with a compatible
solvent suchas mineral spirits or water.
3. Changing from Water-Based to OilBased Paint. Flush with soapy water,
then mineral spirits.
PEN POSITION
2. Remove the filter bowl and screen; clean
the screen separately and install the bowl
without screen. Be sure the filter drain
valve is closed.
6. Startup After Storage.
Before Using Water-Based Paint,flush out
the mineral spiritswith soapy water followed by a clean water rinse.
When Using Oil-Based Paint,flush out the
mineral spirits andthe unit isready to use.
5. Check all paint line fittings for leaks. If any
leak, first shut off the sprayer, open the
drain valve slowly to relieve pressure, then
tighten fittings. Start the
sprayer again and
recheck the fittings.
6. Remove the suction tubefrom thesolvent
Squeeze the trigger and let the pump
force thesolvent out of the hose..Butdon't
let the pump run dry for more than 1/2
minute! Then turn off the sprayer and
engage trigger safety.
3. Pour half a gallon (2liters) of compatible pail.
solvent (mineral spirits or water, see
"When t o Flush") into a bare metal pail.
Put the suction tubeinto thepail.
4. Point the spray gun (with no tip installed)
into a metal waste container, and with a
metal part of the gun firmly touching the
metal container, squeeze the gun trigger.
Now turn thesprayer's ON-OFF switch to
ON and turn the pressure control knob
toward INCREASE until the motor starts.
Keep the gun triggereduntil clean solvent
comes from thenozzle. Thepump will stop
after you release the trigger. Engage trigger
safety. This procedure avoids splashing
and static markina.
7. Unplug the powersupply cord, put a can
under the drain valve, and slowly open the
valve to relieve pressure.Unscrew the filter
bowl and reinstall the clean screen.
Reinstall the bowl, hand tight only.
8. If you have flushed with mineral spirits and
are going to use a water-based material,
flush with soapy water, followed by clean
water rinse. Repeat Step 1.
"-.
"
c
Preparing the Paint
Prepare the paint as instructed by the New paint
seldom needs thinning. Add solvent
manufacturer. If the paint has been opened
t o old and remixed paints to replace the solvent lost throughevaporation. Do not add too
before, remove any skin that has formed. Stir
much solvent as thin paint is hard to control
the paint thoroughly
to dissolve hard
a fine nylon
and doesn't cover very well. Follow the paint
pigments. Strainthe paint through
mesh bag (availableat most paint dealers) to
manufacturer's recommendations on thinning.
remove particles that might clog the filter or
the spray tip. This is probably
the most important step toward trouble-free spray painting.
Priming theSprayer
Plug the sprayer into a grounded 3-prong
outlet. Close the drain valve. Put the paintsuc-
tion tube into thepail of paint,but don't install
the spray tip yet. Disengage the triggersafety,
aim the gun intoa metal waste container, so a
metal part of the gunis touching the metal
container, squeeze the guntrigger, turn on the
sprayer and let it run until all air is forcedout of
the system.
NOTE: If the pump is hardto prime, place a
container under the drain valve, turn
on the sprayer and open the drain
valve. Let thesprayer run untilpaint is
coming from thedrain valve. Close the
drain valve. This method bleeds the air
from the pump. Then release the trigger safety and trigger the gunto prime
the hose. Engage the trigger safety.
Install Tip and Tip Guard.
Unplug the sprayer, trigger the gun, engage valve.
Unscrew the retaining
nut from the
gun.
the trigger safety, and slowly open the drain
Install the Reverse-A-Clean 111 spray housing
with tip installed (see instruction manual
.
307-321). Then, tighten the retaining nut by
hand until snug. Finally, use a wrench and
tighten the retaining nut 1/4 turn. This is
essential to prevent leaking.
Adjusting the Spray Pattern
Adjust the pressure control knob so the fluid
pressure completely atomizes the spray from
the gun. Always use the lowest possible
pressure to get the desired results.
Now test the spray pattern ona piece of light
colored paper. The tip position determines the
direction of the pattern width.To adjust the
pattern, engage the trigger safety and loosen
the retaining nut to position the tip so the'
groove is horizontal fora horizontal patternor
vertical fora vertical pattern.Once positioned,
tighten the retaining nut.
Clean the frontof the tip outfrequently during
the day's operation. First unplugthe sprayer,
engage the trigger safety, and open the filter
drain valve to relieve system pressure. Then
use a solvent soaked brush to keep material
from building up and clogging the tip.
SPOTTY
PAlTERN
INCREASE
PRESSURE
GOOD
FULL
PATTERN
Cleaning a Clogged Tip
If the spray tip clogs while spraying, simply
release the trigger, engage the trigger safety,
and rotate the Reverse-A-Clean handle 180".
Disengage the trigger safety and trigger the
'gun into a waste container. Thiswill remove
most obstructions. Return the handle to the
original positionand resume spraying.
If fluid pressure fails to clear the spray tip, shut
off the sprayer and unplug it. Open the drain
valve to relieve system pressure. Disassemble
in reverse order of the assembly instructions.
(See manual 307-321).Thoroughly clean all
parts in a compatible solvent. Inspectall parts
for wear or damage. Replaceparts as needed
and reassemble.
WARNING
DO NOT hold yourhand, body or a rag in
front of the spray tip when cleaning or
checking a clogged tip. Always pointthe
gun toward the ground or into a waste
container when checking to see if the
obstruction has cleared.,
DO NOT try to "blowback" paint; this is
NOT an air spray unit.
307-463
7
'
Best Application Methods
RIGHT
Always holdthe gunperpendicular to the surface and keep the gun at an
even 12 to 14 in.
(300-356 mm) from the surface you are
spraying.
I
WRONG
I
Begin moving thegun in a horizontal direction
at a steady rate.Start thespray stroke off the
target surface and pull the
trigger as the gunis
moving. Then, while the gun- is still moving,
and as you approach the other edge, release
the trigger. This method avoids excess paint
build-up at theend of each. stroke.
The correct speed for moving the gun will
allow a full, wet coating to be applied without
runs or sags. Lapping each stroke about 50%
over the previous stroke produces uniform
paint thickness. And spraying in a uniform pattern alternately from right to left, then leftto
right, provides a professional finish.
The best wayto control the rateof coverage is
with the guntip size. A small tip orifice applies
less paint and a narrower pattern. A larger tip
orifice applies more paintand a wider pattern.
Do not tryto increase coverage by increasing
the fluid pressure! Using the lowest pressure
necessary to get theresults you want will help
prolong the lifeof your sprayer and minimize
paint lost by overspray.
8
307-463
w-
For interior corners, such as on a bookcase or
inside a cabinet, aim the gun toward the
center of the corner to spray. By dividing the
spray pattern this way, the edges on both
sides are sprayedevenly.
However, you can make one from a thin,
lightweight piece of sheet metal. The shield
should be at least 14 in. (356 mml wide and
have two parallel, 30" angles, one above the
line and one below the line. When spraying
with a shield, hold it firmly against the surface
and angle the spray away from theedge of the
shield. This is to keep the spray away from the
hand holding the shield, and to prevent paint
from being forced underneath theedge and
onto theprotected area.
A shield held by the painter can be used instead of masking to protect areas not to be
painted. Specially designed shields are
available at many professional paint stores.
WARNING
When using a shield, be very careful to
keep the spray away from the hand
holding theshield. Spray from the guna t
this distance could penetrate the skin,
causing serious injury.
-
If there is a wind, angle the spray pattern into
the wind to minimize drifting. Paint from the
ground to the roof.
Electrical outlets and lamps. Protect electrical
outlets with masking tape. Cover lamps with
plastic bags secured with masking tape.
Shrubs. When painting nextto the house, use
rope and stakes to tie the shrubs back from
the surface to be painted. Then cover them
with a canvas dropcloth as the painter approaches the area. Remove the canvas
dropcloth as soon as the area is painted, to
prevent possible dama,ge to the shrubs.
Nearby objects. Move objects such
as
automobiles, picnic tables, lawn furniture, etc.
up-wind of thesurface to be sprayed. In the
case of a nearby home, makea protective barrier by hanging plastic between two long
poles.
Concrete walks. If the walkways will be walked on, cover them with a canvas dropcloth to
avoid slipping. Otherwisea plastic cloth is all
that is needed.
307-463
9
,
.... ,
.
. .. .
,
Shutdown And Care Of Your Sprayer
WARNING
Always shut off the pump and relieve
system pressure when you are done
spraying for a while, when storing the
sprayer, and before adjusting, removing
or adding any parts.
To relieve pressure, shut off the pump,
trigger the spray gun, engage the trigger
safety, and open the drain valve.
Check the packing nut/wet cup periodically.
The packing nut should be tight enough to
stop leakage -no tighter. Use a screwdriver
and light hammer to adjust the nut. Don't
over
tighten! Overtightening may cause binding
and excessive packing wear.
Clean the outlet filter often and
whenever the
sprayer is stored. On the last workday of the
week, flush all the paint out of the sprayer.
See "Flushing Guidelines" on page 6 . If you
are using a paint that will dry overnight, flush
the sprayer daily a t shutdown.
For very short shutoff periods leave the suction tube in thepaint andclean the spray tip.
Always wrap the hose around the sprayer
when storingit, even if only overnight,to help
protect the hose from damage.
'
'
Don't store thesprayer with water in it. Even
for overnight storage, you should fill the
sprayer with mineral spirits. This prevents rust
and greatly extends thelife of the sprayer.
10
307-463
.. ..
. . ..
WARNING
Always disconnect the sprayer from the
power source and relieve system pressure
before attempting anyservice.
Troubleshooting Guide
F
- PROBLEM
Electric motor won't run
SOLUTION
CAU.SE
Power cord unplugged, or building cir- Check, replace
wit fuse blown
Overload switch has opened
-
-
-
Unplug power cord*,
decrease pressure
Pressure setting too low
Increase
Electric motor stops while spraying Power cord unplugged, or building cir- Check, replace
cuit fuse blown
Overload switch has opened
Unplug power cord*,
relieve pressure-allowto
cool
Pressure setting too low
Increase
Remove and clean
Tip or filter plugged
Electric motor runs,but no output
Displacement pump frozen or gear trailThaw"'
damage
Electric motor labors when starting Capacitor failure
Replace capacitor
blows fuses
Excessive surgeat spray gun
Tip or.filter plugged
Remove and clean
Spray tip too big or worn
Change tip - see manua'
307-321
Thin
Paint too viscous
Wrong type hose
Use minimum 50 ft
115 m) static free nylon
hose only -wire braid
hose unacceptable
Not enough paint pressure
Pressure setting too low
Increase
Spray tip too big or worn
Change tip - see manual
307-321
Tails or fingersin spray pattern
Pressure setting too low
Increase
Outlet filterdirty or plugged
Clean
Spray tip too big or worn
Change tip - see manual
307-321
Paint supplylow or pail empty
Paint too viscous
Wrong typehose
-
Paint runs or sags
-Static sparking from spray gun
i
Outlet filter dirty or plugged
Sprayer sucking air or gun needle
not
seating
Sprayer or worknot grounded
Fill
Thin
Use minimum~50h
I15 m) static free nylon
hose only - wire braid
hose unacceptable
Clean-see manual
307-273
Tighten fittings, service
gun-see manual 307-046
Check, ground
'The electric motor has an overhea J protector switch which automatically resets on cooling.
If it
opens, unplug power cord and
let rayer cool for 30 to 60 minutes. Also try to correct thecause of
overheating. Alwaysuse the lowe: lressure setting needed.
**Freezing resultsfrom failure to replace flushing waterwith mineral spirits solvent.
TECHNICAL DATA
0.5 hp (0.37285 kW), 1425 rpm, 220 V, 50 HzAC, single
phase with automatic reset thermal overload switch.UL
recognized
Electric motor
No. 14 gauge, 3-wire; use 14 ga(min) 3-wire extension cord.
Electric cord
60 mesh (250micron) stainless steel screenwith 3/8 nptlf)
Paint filter
inlet and 1/4 npt(f) outlets; reusable type.
2500 psi (172 bar) maximum working pressure;
0.33 gpm
Paint Pump
(1.25 liter/min)output.
Delrin,PTFE Leather, Stainless Steel, Polyethylene,
Tungsten Carbide, Polyurethane, Nylon, Aluminum,
Nitralloy.
Wetted parts
Operating weight
68 Ib (30 kg) approximately
Noise level : Does not exceed 3 ft (914 mm) frommachine.
Electrical requirements : 220 V, 15 amp circuit
THE GRACO WARRANTY
Gram Inc. warrants all equipment manufactured byit and bearingits name to be free from defects in
material and workmanship under normal use and service.
This warranty extends to the original purchaser
for a period of 12 months from the date of purchase and applies
only when the equipment is installed and
operated in accordance with written factory recommendations. Thiswarranty does not cover damage or
wear which, in the reasonable judgment of Graco. arises from misuse, abrasion, corrosion, negligence.
accident, substitution of non-Graco parts,faulty installation or tampering.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective for
examination by Gracoto verify the claimed defect. If the claimed defect is verified, Graco
will repair or
replace free of charge. any defective parts. The equipmentwill be returned to the original purchaser
transportation prepaid. If inspection of the equipment doesnot disclose any defect in workmanship or
material, repairs will be made at a reasonable chargeand return transportation will be charged.
THIS LIMITED WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTiES
(EXPRESS OR IMPLIED1 INCLUDING WARRANTYOF MERCHANTABILITY OR WARRANTY OF
FITNESS FOR A PARTICULAR PURPOSE AND OF ANY NON-CONTRACTUAL LIABILITIES
INCLUDING PRODUCT LIABILITIES BASED ON NEGLIGENCE
OR STRICT LIABILITY.EVERY FORM
OF LIABILITY FOR DIRECT, SPECIAL OR CONSEOUENTIAL DAMAGESOR LOSS IS EXPRESSLY
EXCLUDED AND DENIED.
EQUIPMENT N.OT COVERED BY GRACOWARRANTY. Accessories or componentsof equipment sold
by Gracothat are not manufactured by Graco (such as electric motors, switches,hose, etc.1 aresubject
to the warranty. if any, of their manufacturer. Gram willprovide purchaserwith reasonable assistancein
making such claims.
Factory Branches: Atlanta. Dallas, Detroit, Los Angeles. West Caldwell (N.J.1
Subsidiary andAffiliate Companies: Canada: England; Switzerland; France; Germany; Hong Kong; Japan
GRACO INC.
P.O. BOX 1441 MINNEAPOLIS, MN 55440
PRINTED IN U.S.A. Jn-463241