Graco LineLazer GM 3500 Operation manual

INSTRUCTIONS-PARTS LIST 308-082'
This manual contains important
Rev. S
warningsandInformation. GRACo Supersedes Rev. P
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
GM.3500
GASOLINE-POWEREDAIRLESS LINESTRIPER \
3000 psi (2 10 bar; 2 1.0 MPa) \I
Maximum Working Pressure
Model 231-132, Series A
With onegun, RAC IV" DripLess" Tip guard,
Size 319 LineLazerTip
8 Size 517 Switchlip".
and
50 foot (15 m) hose.
Model 231-140
Same as 231-132, except includes
SecondGunKit, 224497
NOTE: This isanexampleof the English languageDANGER labelon your sprayer.
This label
is supplied with the sprayerinother languages. Before operating the
sprayer, apply aDANGER label inthe appropriate language for you operators,
accordingto the separate instructions supplied withit.
WID
FIRE AND
EXPLOSION
HAZARD
Spray painting. flushing or claanlng equipment wlth flammable
liquids
In confined areas can resun in fireor explosion.
Use outdoore or In ememely WSII ventllatad amas. Ground
equipment, hoses,containanand
objects baingsprsysd.
Avold
ai1 IgnRion sourcaa such as statlc slectrlcity from plastic
drop cloths,
open flamed such as pilotlights, hot object8 such a
clgaretkas, aru from connectingor diseonnectlng powor cords
or turnlngllghtswitches
on end off.
Faliure to follow hls rmmlngcan result In death orwrlous Injury
READ AND UNDERSTAND ALL LABELS
I
I
SKIN INJECTION
HAZARD
Uqulds csn bs Injected into the body by hlghpre-ure alrless
apmyor leab -especially hose iesks.
Keep body clear of the nozzle. Never stop Isab Wm, any pen of the
body. Drain all pressureMoreremovingparts.Avold accidental
trlggerlng
of gun by slwsys setting safety latch when not spraying.
In case of sccldentai skin Injectton, seek lmmedlaw
Never spray
wrthout a Up guard.
"Surgical Treabnenr'.
Fsliure to follow his warning can result In amputation or serlous
idUN.
..
4D INSTRUCTION MANUALS BEFORE USE
1
GRACOINC. P.O. BOX 1441MINNEAPOLIS, MN 55440-1441
@COPYRIGHT 1990, GRACO INC.
Graco Inc. is registeredto 13. EN IS0 9001

Part Identification
Key
A Casterlever
B Dualgunselector
CMain hose
D
Suction hose
E Fluidfilter
F Pressuredrainvalve
G An
H Post
J Canlagebar
K Gunholder
L Rac IV fipguard
0 Displacementpump
N Flexgun
0 Dualgunselectorcable
PCaster
R Pressurecontrol
T Air Cleaner
S Spark plugcable
U Muffler
V FuelTank
W Hook evelet luseto StraD
M switchnp
pi11orbailcover
to carti
X Pailcover
Y CasterCable
Z Groundingcableand
clamp
V
2 308-082

Table of Contents
Warnings ...................................... 4
Setup
......................................... 7
Fueling
...................................... 10
Second Gun and Hose Installation
............... 11
Flushing
..................................... 12
Startup
....................................... 13
Spray Tip and Tip Guard
....................... 15
GasketSelection ....................... 15
Operation 15
Installation 15
Clearinga CloggedTip
................. 15
SprayTipSelection16 Maintenance 15
Spray Tip Application Recommendations
.. 16
SprayTechniques
............................. 16
Positioningthe GunArmAssembly17
LineWidthAdjustment16
Vertical position
of the first or second gun . 17
Horizontalpositionof the first gun
........ 17
Horizontal position
of the second gun ..... 17
Mount guns onthe engine side
of the cart . 18
AdjustSimultaneousGunTriggering18Setupforsprayingarcs18
GunArmPositions
............................ 19
Caster Lever & Cable Operation ................. 20
Operation
............................. 20
Maintenance
.......................... 20
Caster Cable Tension Adjustment
........ 20
CasterAlignment
...................... 20
............................
.............................
..........................
............................
..................
..............
.................
.............
Caster Tire Replacement ................ 20
Howto Mountthe Gun
......................... 20
GunCable
& Dual Gun Selector Operation ....... 21
How
the DualGunSelector Works ....... 21
How to Releasethe Selector Cable
....... 21
Adjust theTrigger Cable Tension
......... 22
Maintenance
.................................. 23
Troubleshooting
............................... 24
Repair or Replacement
DisplacementPump
.................... 26
PressureControl
....................... 28
PressureControlAdjustment
............ 29
Bearing Housing and ConnectingRod
.... 30
DriveHousing
......................... 31
PinionHousing
........................ 32
clutch ................................ 34
Field&WiringHarness36 Engine
35
Clamp ................................ 37
ClutchHousingRemoval
................ 37
Reassembly
........................... 38
DisplacementPump Paris
............... 42
CartParts
44
PressureControlParts 43
MechanicalParts
...................... 46
GunMountingParts
.................... 48
TechnicalData
50
PinionParts 49
Accessories
.................................. 50
Warranty ..................................... 52
................................
.................
Parts .
..................
.............................
...........................
................................
Manual Change Summary
This manual was updated to include the changes from PCN N except for23&052 (CASTER. swivel) .
This manual was changed to include the updated pressure relief system per ECO F4963 .
0 Errors in the Parts Lists were corrected .
308-082 3

Symbols
Warning Symbol Caution Symbol
This symbol alertsyouto thepossibilityof serious This symbol alertsyouto the possibility of damage to
injury
or death if you do notfollow the instructions. equipment ifyou do not follow the instructions.
EQUIPMENT MISUSE HAZARD
Equipment misusecancausethe equipment to rupture or malfunctionand result inserious injury.
This equipmentis for professional use only.
Readall instruction manuals, tags, and labelsbeforeoperating the equipment.
Use the equipment only for its intended purpose. If you are not sure,call your distributor.
Do notalter or modifythis equipment.
Check equipment daily. Repairor replace womor damaged parts immediately.
Do notexceed the maximum working pressureof the lowest rated system component. Refer to the
Technical
Data on page 50 for the maximum working pressureof this equipment.
Use fluids andsolvents which are compatible with the equipment'wetted parts. Referto the Tech-
nical
Data sectionof all equipment manuals. Read the fluid and solvent manufacturer's warnings.
D Do not use hoses to pull equipment.
Route hoses away from traffic areas, sharp edges, moving parts, andhotsurfaces. Do not expose
Graco hoses to temperatures above82°C (180°F) or below-40°C (40°F).
Do not li pressurized equipment.
B Comply withall applicable local, state, and nationalfire, electrical, andsafety regulations.
B Wear hearing protection when operating thisequipment.
b Do not use 1,l ,I-trichloroethane, methylene chloride, other halogenated hydrocarbon solventsor
fluidscontainingsuchsolvents
in pressurized aluminum equipment.Suchusecouldresultina
chemical reaction, with the possibility
of explosion.
4 308-082

INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashedinthe eyes or on the skin can also
cause serious injury.
e Fluidinjected into the skin may look like just a cut, but it is a serious injury. Get immediate medi-
cal attention.
e Do not point the gun at anyone or at any partof the body.
e Do not put your hand or fingers over the spray tip.
e Do not stop or deflect leaks with your hand,body, glove or rag.
e Do not "blowbacVfluid; this isnot an air spray system.
e Always have thetip guard and the trigger guard on the gun when spraying.
e Check the gundiffuseroperation weekly. Refer to the gun manual.
'. e Be sure the gun trigger safety operates before spraying,
e Lock the gun trigger safetywhen you stop spraying.
e Follow the Pressure Relief Procedure on page 7 if the spraytip clogs and before cleaning,
checking or servicing the equipment.
e Tighten all fluid connections before operating the equipment.
e Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do not
repair high pressure couplings; you must replace the entire hose.
e Fluid hoses must have spring guards on both ends, to help protect themfromrupturecam4by
kinks or bends near the couplings.
TOXIC FLUID HAZARD
Hazardousfluid or toxic fumes can cause serious injury or death if splashed in the eyes or on theskin,
inhaled, or swallowed.
Know the specific hazardsof the fluid you are using.
0 Sfore hazardousfluid in an approved container. Disposeof hazardous fluid according to alllocal,
state and national guidelines.
0 Always wear pratective eyewear, gloves, clothing and respirator as recommendedbythe fluidand
solvent manufacturer.
FUEL HAZARD
The fuelused in this unit is combustible and when spilled on a hot surfacecanignite and cause a fire.
e Do not fill the fuel tank while the engineisrunning or hot.
EXHAUST HAZARD
The exhaust contains poisonous carbon dioxide whichiscolorless and odorless.
e Do not operate this equipmentina closed building.
308-082 5

FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result
in a fireorexplosion and serious injury.
0 If there isany static sparking or you feel an electric shock while using this equipment, stop spray-
ing immediately. Do not use the equipment until you identify and correct the problem.
0 Providefreshair ventilation to avoid the buildupof flammable fumes from solvents or the fluid
being sprayed.
0 Keep the spray area free of debris, including solvent, rags, and gasoline.
0 Disconnect all electrical equipment in the spray area.
0 Extinguishall open flames or pilot lights inthe spray area.
Do not smokeinthe spray area.
0 Do notturn onor off any light switch in the spray area while operating or if fumes are present.
0 Do not operate a gasoline engine in the spray area.
Ground the sprayer to a true earth ground with the ground wire and clamp (supplied).
0 Use only electrically conductive hoses.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers.
Keep clearof all moving parts when starting or operating the sprayer.
0 Before servicing the equipment, follow the Pressure Relief Procedure on page 7 to prevent the
equipmentfromstarting unexpectedly.
6 308-082

Setup
GeneralInformationPressureReliefProcedure
NOTE: Reference numbers and lettersin parentheses
inthe text referto the callouts in the figures and the
parts drawing.
NOTE: Always use Genuine Graco Parts and Acces-
sories, available from your Graco distributor.
Grounding
FIRE AND EXPLOSION HAZARD
system as explained below. Also read
Beforeoperating,thepump, ground the
the section
FIRE OR EXPLOSION HAZ-
ARD on page 6.
1
2.
3.
4.
5.
6.
7.
Sprayer: make sure the grounding chain (106)
contacts the ground while the unit is moving. See
page
46. For stationary spraying, connect a
ground wire and clamp
(159) to a true earth
ground.
maximum of
500 ft. (150 m) combined hose
fluid hoses: use only grounded hoses with a
length to ensure grounding continuity.
Spray
gun: obtain grounding through connection to
a properly grounded fluid hose andsprayer.
Objectbeingsprayed: according to local code.
Fluidsupply container:follow your local code.
code. Use only metal pails, which are conductive,
Solventpails usedwhen flushing: follow your local
pailona nonconductive surface, such as paper or
placed on
a grounded surface. Do not place the
cardboard, which interrupts the grounding continu-
ity.
To maintaingrounding wntinuify when flushing or
gun firmlyto the sideof a groundedmetalpail,
relieving pressure, hold
a metal partof the spray
then triggerthe gun.
INJECTION HAZARD
Fluidunder high pressure can be in-
jected through the skin and cause seri-
ous injury. To reduce the risk of an injury
from injection, splashing fluid, or moving parts, fol-
I low the Pressure Relief Procedure whenever you:
are instructed to relieve the pressure,
stopspraying,
check or service any ofthe system equipment,
or install or clean the spray tips.
1. Engage the spray gun safety latch.
2. Turn the ON/OFF switchto OFF.
3. Fiip the pressure control switch to OFF.
4. Disengage the gunsafetylatch. Hold a metal part
of the gun firmlyto the sideof a grounded metal
pail, and triggerthe gun to relieve pressure.
5. Engagethegunsafetylatch.
6. Hold the pressure relief tube firmly to the sideof a
valve. Leave the valve openuntilyou are readyto
grounded metal pail, and open the pressure relief
spray again.
system from starting unexpectedly.
7. Disconnect the sparkplugcable to prevent the
clogged, orthatpressure has not been
fully relieved
If yoususpect that thespraytip or hose is complete/y
tip guard retaining nut or hose end coupling and relieve
afterfollowing thestepsabove,
very s/ow/y loosen the
pressure gradually, then loosen completely. Now clear
the tip or hose.
Valve shownIn Valve shown
CLOSED
position.
in OPEN position.
- Fig. 2
308-082 7

Setup
1. Read and follow the warningsonpages 4 and 6 7. Provideadequateventilationwhensprayingindoors.
before installing or operating thissprayer.
2. Unpack the LineLazer Carefully raise the handle (19)
to a vertical position. Four screws (39) and locknuts
(40) are packed in a bag. Install the two rear screws
(39A) and finger tighten the nuts (4OA). Install one exhaust
to the outdoors or provide adequate veri-
screw (398) and nut (408) oneach side of the han-
dle. Firmly tightenallfour nuts. See Fig.
3.
If the LineLazeris used indoors, you must vent the
tilation as specified by youlocalcode. Thisisto
reduce the risk
of carbon monoxide poisoning.
8. Fillthe gas tank. See Fuelingon page 10.
9. Flush the pump to remove the lightweight oil which
was leftin
me pump to protectitfrom rust. Follow the
Flushing
on page 12.
10. Preparethepaintaccording tothemanufacturer's
recommendations. Remove any skin that may have
formed. Stir the paintto mix pigments.
Strain
the paint through a fine nylon mesh bag (avajl-
able at most paint dealers) to remove particles that
could clogthefilter or spray tip.This is an important
step towardtroublefreespraying.
3. To install a second gun and hose, see page 11.
4. Fill the packingnut/wet-cup (216) 1/3 full with
Graco ThroatSealLiquid(TSL), supplied, and
keepitfilled, to help extend the pump life. See
Fig.
4.
5. Check the engineoil level. Refer to the Honda
engine manual, supplied.This is
a summary of the
information: Remove oneof the oil
fill plugs (A);
Add oilas necessary. Also read theMaintenance
the oil should be almost overflowing. See Fig.
4.
section on page 23.
gentoil, SA€ iOW-40, classified "FORSERVICE
Recommended engine oil: Use a high-quality, deter-
SE or SF".
6. Ground the sprayer. Proper grounding is essential to
maintaining an electrically safe system.
Also read
6.
andfollow FIRE OR EXPLOSION HAZARD on page
Groundthesprayer wheneveritis used indoors,
either
as a movingline striper or as a stationary
sprayer. Floors
in most factories are coated, which
causesthemto
be poor electrical conductors. This
increases the risk of hazardous static electric
discharge, which can resultinserious injury, fire, or
explosion andpropeltydamage.
Whenever
you flush: connectthegroundclamp
(159) to a true earth ground.
chain attached to the bottomof the cart drags on the
Using
as an outdoor striper: Besurethestatic
ground
to help dissipate static electricity. Ground the
sprayer to a true earth ground
if specified by your
local electrical code.
Indoor spraying: Ground the sprayer whenever the
sprayer is used indoors. The ground wire supplied
with the sprayer is not long enough to allow much
operatormovement.Therefore,theoperatormust
provide a longergroundwire orprovide some other
methodof effectiveelectricalgroundingasspecified
Fig.
by your local electrical code.
8 308-082

11. Observe the following cautions to avoid pressure
control damage.
I
A CAUTION
To avoid damaging the pressure control, follow these
precautions.
0 Allow themainhoseto act asa pulsation damp-
ener: Always use nylon spray hose at least
50 ft.
(1 5 m) longfor the maingun; Never use a wire
braid hose;
it is too rigid.
0 Neverinstalla ballvalve or shutoff device be-
Weenthe filterandthe
50 R. (15 m) hose.
0 Do not allow wateror water-base material to
freeze inthe pressure control.
~
A CAUTION
Close the black fuel shutoff lever whenever you are
transporting the sprayerto prevent fuel from flooding
the engine.
Keep the sprayer upright andlevelwhen operating it
and transporting it. This prevents crankcase oil from
leaking into the combustionchamber, which makes
startuDvew difficult.
12. To use the wheel brake,liftthe brake handle(A-
the handleto disengagethebreak. See Fig.
5. For
bottom rear
of cart) to engage the brake. Lower
proper tire pressure and that tire wear is not
positive break engagement, be sure there
is
excessive.
13. Forhow to operate and adjust the various features
of the LineLazer
see pages 11 - 22.
14. Start thesprayer. See page 13.
308-082 9

Fueling
Gasolineis extremely flammableandexplosive
under certain conditions.To reduce the riskora fire
or explosion:
1. Always shut off the enginebeforerefueling.
2. Refuelinawell-ventilatedarea.
3. Do not smokeor allowflames or sparks inthe
' area wherethe engine is refueledor where
gasolineis stored.
4. Do not overfillthe tank. Make sure the filler cap
issecurely closed after refueling.
5. Fuel vaporor spilled fuel can ignite.Ifany fuel
is spilled during refueling, make sure the area
is dry before starting the engine.
1. Fuel specifications. Use automotivegasolinewith
a pump octane numberof
86 or higher. If the
engine knocks or pings, use a higher octane fuel.
Unleaded fuel minimizes combustion chamber
deposits.
2. Gasolines containing alcohol (gasohol). Do not use
gasohol which contains methanol, if the gasohol
does notcontaincosolvents and corrosion inhibi-
torsfor methanol. Even
if it does contain such
additives, do not usethe gasohol if it contains
more than
5% methanol.
NOTE: TheHONDAenginewarrantydoesnotcover
damage resulting from the
use of gasolines containing al-
cohol. See the HONDA engine manual for more informa-
tion.
3. General.Do not use oil and gasoline mixtures or con-
taminated gasoline. Avoid getting dirt,dustor water
inthe fueltank.
4. Tank capacity: 0.66 gallons (2.5 liter). Leave 1/2 in.
(13 mm) atthe topof the tankfor gas expansion.
5. Shut off the engine switch(A) beforerefueling.
6. After refueling, tighten the fuel tankcap (B) firmly.
Flg. 6 wo9
10 308-082

Second Gun and Hose lnstallation
NOTE: Fig. 7 representstheinstallationatStep 3. 6. Disconnectthetriggercablefromthesecondgunat
NOTE: To switch the gun assembliesto the engine side
oftheCart, refertotheinstructions On page
17 beforein- 7, Unscrewthefilter’ssecondoutlet cap (14). screw
stallingthesecondgunkit.theshorthose
(403) ontothefilternipple.
the screw
(34). See Fig. 7 DETAIL 8.
1.
2.
3.
4.
5.
Disengage the triggercablefrom the block (48) of
the unit’s existinggun. See page 21. Engage the
gun’s trigger safety latch.
Loosen the carriage clamps
(8, C). Slide the
carriagebar
(4) off the cart.
For
mom the secowbar on the ~AQ@
carriagebar (4). Slidethe carriage bar through the
Slide
a clamp (405A) onto the
pump-side carriageclamp
(8) andinto the center
of the cart. Now slide another clamp
(4058) onto
the carriagebar. See Fig.
7.
of the cart
For mountrnthesecond aun bar on the enaine side
. Follow Step 3, except slide the carriage
bar through the engine-side carriage clamp(C) and
the into the center ofthecart.Theknobsofthe
clamps
(405A. 4058) mustfacebacktowardthe
handle bars.
Slidethe carnage bar
(4) through to the opposite car-
nageclamp., Tightenthe carnage clamps(B,C).
carriage bar that the clamp
(4058) engages the bar.
Slide the secondgun bar
(404) far enough into the
Position the clamps(405A,
4058) over the notches
(A) inthe carriagebar
(4) and tighten theclamps.
8. Remove the guide clamp screw (27).
9. Snap the cable bushing (E)intothe guide plate (D).
gun cable, separating the guide clamp
(104) to feed
Route the trigger cable
(402) parallelwith the main
screw
(27). Route the cable through the cable guide
thecablethrough it. Install and tightentheclamp
(7) andto the secondgun.
10. Slide the hooked endof the cable (402) through the
hole
(F) inthe lever plate (122). Rotate and slide the
hook back until it engages the plate. See DETAILA.
11. Reconnectthetrigger cable to the second gun at
screw
(34). Torque the screwto 15 iwlb (1.7 Nm).
back
it off 1/16 to 118 turn andthen tighten thejam
nut
(99) while holdingthe screw (34). Be sure the
plate
(94) moves freely.
12. Installthe clip (401) to holdthe cable onto the frame.
13. Connect both trigger cables to the blocks (48). Then
adjust the cable tension.See pages
20 and 22.
14. Do not install thespray tip until the systemisprimed.
15. Adjust simultaneous gun triggering. See page 18.
NOTE: Forstable gunoperation, the second
gun bar
(404) has a maximum recommended
extension from the carriagebar
of about
11 -‘/4” (286 mm).
and then back up
111 6 to I& ium
024908
308-082 11

Flushing
To reduce the risk of serious injurywhenever you
are instructedto relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Besure the pumpisproperly grounded.
A CAUTION
itcouldfreeze. Pushthe water out with compatible
Never.leavewater
in the sprayer fi the isany chance
solvent. Waterfrozen
in the pressure control tube
serious damagetothe pressure control.
preventsthe sprayer frombeingstarted, andcauses
When to Flush
1. Flush anew sprayerto remove the protective oil.
Beforeusin0water-
vent, then soapywater, andthen cleanwater.
' usecompatible sol-
seusecompatiblesoivent.
2. Changing colors. Usea compatible solvent.
3. Changingfromwater-base to oil-base paint.Use
warm, soapy water, andthen a compatible solvent.
4. Changing fromoil-base to water-base paint. Use a
compatiblesolvent, then warm,soapywater, and
then cleanwater.
5. Storage.After the compatiblesolventflush,relieve
pressure, butdo not drain the compatible solvent.
6. Startupafterstorage.
ible solvent with soapy water, and then with clean
-flush
out the compat-
water.
solvent with thepaintto besprayed.
Whenflushout the compatible
..
How to Flush
1. Relievepressure.
2. Remove the filter bowl (A) and screen (8); see manu-
al307-273. Install the bowl and support (C), without
the screen, toflush
It. Clean the screen separately.
See Fig.
8.
3. Close thepressuredrainvalve(13).
4. Put the suction tube in a grounded pail of water or
solvent.
5. Removethegun@)fromtheholder.Removethe
spray tip(s) to prevent splashing.
12 300-002
To reduce the riskof static sparking and splashing
when flushing, always remove the spraytip from
the gun,and hold ametalpart of the gunfirmly to
the side of, and aimed into, a aroundedmetaloail. 1
6. Follow Startup on page 13. Keep the gun triggered
until cleanwater or solvent comesfrom the nozzle.
See Fig.
9. Release the trigger and engage the gun
safety latch.
NOTE: If you have two guns, release the trigger safety
latchon the second gunandtrigger thatgun until clean
water orsolvent comes from the nozzle.
To ensure that
the hoses are well-flushed, flush the first gun and then the
second gun at least one more time.
7. Check all fluidconnectionsforleaks.Relievepres-
surebeforetighteninganyconnections.Startthe
sprayer. Recheck the connections for leaks.
8. Remove the suction tube from the solvent pail. Dis-
engage thegun safety latch. Trigger the gunto force
water or solvent from the hose. Do not let the pump
the pump packings! Relieve pressure.
rundry for more than 30 secondsto avoiddamaging
Fig. 0'. w13
A Maintainfirm metal-
terneta1 contact
when Rushing
to
of static s arklng
reduce the chance
and
splasiing.
I 4-n
Fig. 9 u W14
9. Ifyou have been spraying paint, remove the strainer,
suction tube and suction hose and clean them sepa-
ratelyto be sureall paint sedimentis removed. Dried
cause performance problemslateron.
paintinthe suction tube assemblycan buildupand
10. Installthe clean filter screen. Install the filter bowl and
handtighten.
11. SeeStorageorChangingColors,above.Relieve
pressure.

,Startup
BeforeYou Start the Linestriper
1. See Flushing, page 12, to determine if the Line Lazer
2.
Be sure the gas tank is full.
3. Check the engineoillevel.
NOTE: The engine stops automatically, or will not start,
if it is low on oil. If you tryto start it again without adding
moreoil.a red light(A)neartheengine
on/off switch
glows as youpullthestarter rope.
4. Be sure the spark plug cable (J) isfirmly pushed onto
Startup See Fig. 10
1. Whenstartingasprayerthat IS NOTPRIMED,re-
movethe spray tip.
2. Place the suction tube (S) into the paint, water or sol-
vent container, depending on whether you are flush-
ingor are ready
to spray.
3. Open the black fuel shutoff lever (E) by pushing it in
the direction
of thearrow.
should be flushed.
the spark plug.
A CAUTION
Never start the engine unless fluid pressureis re-
lieved andthepressure control switchisturned
OFF.
Attempting to start the engine when it ispressurized
4. Turn OFFthe pressure control switch (K).
5. To start the engine:
a.
b.
C.
d.
e.
Turn the pressure. adjusting knob (L)allthe
way counterclockwiseto the lowest pressure
setting.
Slide the metal throttle lever
(C) away from the
fuel tank
to the maximum position (fully left).
ingthe gray lever (D).
If the engineiscold, close the choke bymov-
If the engineiswarm, close the choke by
moving the gray lever
(D) only half way or not
at all.
Turn ON the engine switch
(6).
A rope that recoils too quickly may hit someone
and cause
serious bodily injury. The rope could
alsojam inthe recoil assembly.
f. Hold the frame of the sprayer with one hand
and
pull the starter rope (G) rapidly and firmly.
Continue holding the rope as you
let it return.
Pulland return the rope until the engine starts.
g. Open the choke as soon as the engine starts,
except incoldweather. Incold weather, leave
the choke closed for 10 to
30 seconds before
opening itto keep the engine running.
6. Release the trigger cable and engage the gun trigger
7. Remove the gun from the holder by unscrewing the
8. To start the pump:
NOTE Lower the throttle setting far easier priming.
a. Open the pressure drain valve (R).
b. Turn ON thepressure control switch (K).
c. Turn the pressure control knob (L) about 114
turn from minimum pressure. Run the pump
drain valve, indicating the pumpisfully primed.
until
fluid isflowing smoothlyfrom thepressure
safety latch.
See page 21.
gun holder knob and lifting out the gun.
d. Close thepressuredrainvalve (R).
e. Disengage the gun safety latch. Hold a metal
pail, squeezethetrigger untilfluidflows from
part of the gun firmly against a grounded metal
the gun.
f. Releasethetrigger.Engagethesafetylatch.
NOTE: If you are using two guns, follow Step e and f,
above, for the second gun.
9. If youhavenotprimed the sprayerwithpaintyet,
move the suction tube
(S) to the paint container. Re-
lease
the trigger safety latch. Trigger the gun into the
water/solvent pail just until paint appears. Release
the triggerand engage the trigger safety latch.
Re-
peat for the second gun, if two guns are used.
10. Place thepailcover (F) on the pail.
To reduce the risk or
serious injury from fluid
injection, never operatethespray gun
with the tip
guard removed.
11. Install thetipguard and spraytip (M). See page 15.
12. Mount the gunin the gun holder. See page 20.
13. Engagethetrigger cable. See page 21.
I A CAUTION 1
Always use the lowestfluid pressure and the lowest
throttle setting needed. Higher settings cause exces-
sive clutch cycling, prematuretip wear and prema-
14. Adjust the engine speed and pump pressure. Trigger
the gun onto a test paper to check the spray pattern
and atomization. Turn the pressure adjusting knob
throttle setting
(C) as far as you can without changing
(L) until you geta good pattern. Then slowly lower the
the spray pattern.
308-082 13

Startup
15. Read Spray Teohnlques on page 16.
A CAUTION
Close the black fuel shutoff lever (E) whenever YOU
are transporting the sprayer to prevent fuel from
flooding the engine.
Keep the sprayer upright and level when Operating it
and when transporting
it. This prevents crankcaseOil
from leaung into the combustion chamber, which
makes start UD very difficult.
A Engine Oil Lighl
B Engine On/On Switch
c ThmHle Lever
D GravChokeLever
14 308-082

Spray Tip and Tip Guard
Operation
To reducethe riskof serious injury whenever you
are instructedto relieve pressure, always follow the
Pressure Relief Procedureon page
7.
Failure to installor usethe RAC IVtip guard as-
of paintintothe eyes or onthe skinof the operator.
semblycorrectlymay result
in an undirected spray
Besure you:
0 Use the appropriate gasketforthe solvent used.
Fullyinsertthe tip intothe guard.
Fullytightenthe guard onto thegun nozzle
Turn the handle so it is parallel to thegun
0 When replacing a worn spray tip, always install
using awrench.
nozzle.
a new gasketandseat.
Gasket Selection
To reduce the riskof fluidsplashback into the eyes
specifiedinthe followingtext.
oronthe skin, use the appropriate gasket as
Use the black rubber gasket (D) ONLY with latexand
oil-based paints, stoddard solvents, mineral spirits, tur-
pentine andwater. When using thisgasket, the spray tip
can be removedand replaced without using tools.
Use the red or yellow plasticgasket (C) with the same
fluids as aboveandwith mostother solvents, including
lacquer thinner, trichloroethylene,
MEK, acetone, brush
cleaner,
xylol. When usingthis gasket, loosen theRAG
IVretaining nut
to remove the spray tip.
Installation
Relievepressure. Install a tip (F) so the flange(G) onthe
cylinderfits intothe
slots (H) atthe baseof the spray tip
guard
(J). See Fig. 11.
Place the seat
(E) on apencil, curved side out, as shown
turnthe seat untilitstraddles the cylinder
of the spray tip
in Fig. 12. Guide the seatintothe retaining nut(A) and
(F). Drop inthe appropriate gasket and press itdown. If
faces out of the retainer (A). See Fig. 11.
using the redor yellow gasket (C), be sure the flat side
Screw the spraytip guard snugly onto thegun, holding
it inthe desired position while tightening retaining nut (A).
NEVER use a wrenchto turn the plastictip guard
(J), to
avoid damaging the guard.
Keepclearof the nozzle! High pressurefluidfrom
leaksor spray can penetrate theskin and cause
extremely serious injury, including the need for
amputation.The spray tip guard provides extra
protection against injection,butdoesnotprevent it!
Never cut
off the soravtiD auard.
Besure the spray tip handle is in the FULL SPRAY posi-
tion before operating thegun. See Fig.11.
Clearing a Clogged Spray Tip
Disengagethe trigger cable(s). Engage the gun safety
latch. Turn the arrow handleto the FULL CLEANposi-
tion. See Fig.
13. Release the safetylatch and triggerthe
gun. Fluid pressure should force
out the clog. Return the
arrowhandletothe full sprayposition.
If it is stil/
clogged,
followthe Pressure Relief Procedure on
page
7 and remove the spray tip for cleaning.
Maintenance
out; these parts wear at about the same rate.
Change the seat and gasket when the spray tip wears
<’ @- :ED or YELLOW
\
msl
Fig. 12 cos2
FULLSPRAY POSITIONFULLCLEANPOSITION
Fig. 13 w13
308-082 15

Spray Tip Selection
SprayTipApplicationRecommendationsOtherApplications
-
LinealFeetlMinute
(rate et whichunlt
Is moved)
Basedon
4" wide lineand 15 mils of paint
sport court,
2" wide line
115, 117
Crosswalk,
I
12" wideline, 1 gun621,
Application Airport,
Parking
Lot Lines 623,625
400 352 308
264 220 184
144
120
4" wide
24" wide line, two guns 721
224 223
221'
LLT-319't
217
6" wide
231 228
227
225 223 221' 4-6" wide
Stencils
41 7', 41 9'
325 323
321'
319' 317
Long Lines,
Cuhs
419'
417'
General Stationary
Painting
517t
Tips canbe used with two guns. t Suppliedwith the LineLazer.
Spray Techniques
These spray techniques discuss how to use and adjust
the features of the Line Lazer.
You must also consider op-
erator technique,job siteconditionsandweather.
1. Use water rather than paint to practice spraying tech-
niqueandpositioningthe guns.
2. Be sure the RAC IV Tip Guardis always parallelto
theground and the "wings" of the spraytip guard face
the frontand backof the unit, as shownin Fig.
15.
To reduce the risk of a fluidinjection injury, always
disengage the remote trigger cable to the gun(s)
andengagethe gun trigger safety latch(es) before
movingor adjusting the spraytip guards, guns, or
gunans.
See Page 21.
3.
4.
5.
6.
7.
16
Usethe lowest pressure necessary for good atom-
ization. High pressure may cause excessive paint
buildupandoverspray.
Start moving thetine Lazer before triggering the gun
to prevent
a buildupof paint at the beginningof the
line. Release the trigger a second before stopping
the LineLazer. Moveat aneven rate of speed.
Always check your gun adjustments on cardboard or
paper before starting eachjob. When painting curbs,
paint firstin anarea that is
less frequentlyseen.
Keep
in mindthat many factors affectthe straight-
ness of a line, including uneven surfaces, potholes,
tip. See page
15 for howto clear or change a spray
rocksandother debrisand a cloggedor worn spray
tip.
To minimize the effect of bumps onthe spray pattern,
wheel axis.
keepthespray tip guardcenteredwiththefront
308-082
8.
9.
The spray tip size and the rate at which you move the
er you move the unit, the larger the spraytip orifice
unit affect the coating thickness. Generally, the fast-
proximately how wide the linewill be. See the chart
should
be. The fan width of the spraytip indicates ap-
inFig.
14 for spraytip application recommendations.
Positionthe gunsto suit your requirements.
See the
section belowandpages 17
to 19.
10.
Traffic paints maybeformulated for air spray, airless
spray or have no formulation description.Generally,
air spray formulas are pre-thinned, and will work well
inthe LineLazer, but there maybe more overspray.
Non-air spray formulas tend to deliver more lineal
feet of line per gallon with less overspray, since they
are less easily absorbedintothe pavement.
11. If you use fast-draying traffic paint on a hotday, float
compatible solvent on top of the paintto prevent skin
from forming onit.
LineWidth Adjustment
Several factors affect line width: vertical distanceof the
spray tip to the spraying surface, spray tip fan pattern,
us-
ingone or two guns, paintpressure, and a worn or
clogged spraytip.
The typical conditions for a 4in. wide line are:
319 size
from the lowest vertical position,andjust enough pres-
Line LamTip (supplied), the gun positioned one inch
sure
to atomize the paint. Dependingonthe fan pattern
of the spray tip, use one gun to paint
2 to 12 in. wide lines,
and
two guns to paint12to 24 in. wide lines.
To decrease line width, lower the gun (if possible) or use
a tip with a narrower fan pattern.
To increase line width
wider fanpattern, or
use two guns.
, raisethe gun, or use atip with a

Positioning the Gun Arm Assembly
A
A
Fig. 15
The gun arms can be positioned for a varietyof spraying
needs.The drawings on page
19 primarily show the guns
mounted on the pump sideof the Linestriper. However,
one or bothguns maybe mounted on the engine side.
Whenever You Move the Guns
Do not kink thecables, whichcouldprevent them
Disengage the triggercables and engage the gun trigger
cables.
Pull out more of the 50 ft. hose, if necessary.
safety latchfirst.
See page 21. Do not kink the trigger
After mwingthe guns, reposition the spray
tip guard so
it is parallelto the groundand its ”wings” face the front
and
back of the unit. Disengagethe gun trigger safety
latch and engagethetrigger cable.
Vertical Position of the First or Second Gun
lightenthe clamp. Engage the trigger cable.
Loosen thearm clamp
(6) and move the gun up or down.
Horizontal Positionof the First Gun
Md Disengage the trigger cable. Loosen the car-
riage clamps(B,D) and slide the carriage bar(4) left or
right,
so the gun will be outside the tire path.lighten the
clamps. Engage the trigger cable.
Method
2; Disengage the trigger cable. Loosen thearm
clamp
(6) and rotate thegun outto the side.lightenthe
bolt. Engagethetrigger cable.
NOTE: Usemethods 1 and 2 together to obtain the max-
imum distanceof one
gun from the unit, whichishelpful
when spraying around obstacles.
Horizontal Position of the Second Gun
Method 1; Disengagethetriggercable. Loosen the
clamps(405A, 4058). Slide the second gun bar (404)
horizontally, beingsure bothclamps engage the second
gun bar.lightenthe clamps. Engage the trigger cable.
Method
2; Disengage the trigger cable. Loosen the arm
clamp (6) and rotate thegun outto the side. Tighten the
bolt. Engage the trigger cable.
NOTE: Use methods 1 and 2 together to obtain the max-
imum distance of
33”/2 in. (851 rnm) between the center
of two guns.
308-082 17

Positioning theGun Arm Assembly
Mount Gunson the Engine Side of the Cart 7. Installtheguns.Notewhichgunandpositionon the
1. For bothguns, disengage the trigger cable and en- dualgunselectoreach of thecables
(1 and402)
gage the trigger safety latch.
See page 22.
goes. Route the hoses and cables to prevent kinking.
Position the spray tip guards. Disengage the gun trig-
2. Loosenthegunholder Knobs (93) andremovethe ger safety latches. Engage the trigger cables.
gun. Laythegunsoutofthe way.
SetupforSprayingArcs
3. Removetheknobs(E) on bothcarnageclamps
1. Disengage the trigger cable (1) and engage the gun
(9.D); the carriage bar
(4) and extension clamps (A) trigger safety latch.
See page 21.
will drop down. See Fig. 15 DETAILA.
2. Loosenthearmclamp (6) androtatethearm(A)
4.
Lift the fronttire and rotate the carriage bar 180" un- back near the reartireandthen positionthearm
so
the spraytip guard aligns with the back axle of the
unit. Retighten the clamp.
derthecart and tothe other side
of it.
5. Positionthecarnage barbelowthecarriageclamps 3. Extendthecarriagebar (4) orsecondgunbar (404)
(B,D). Aligntheholes in thetop of theextension
clamps (A) with the holes
in the carriage bar clamps
so you can easily watch the line you are painting and
alsoto avoid running overthe paint line.
See page
andinstall
the knobs(E). See Fig. 15 DETAILA. 17.
ioosen the post/arm clamps and
the guns 4. Adjusttheverticalandhorizontalposition of thegun.
forward.Retightentheclamps.
5. Spraythearcfromtheoutside.
Fig. 16
Adjust Simultaneous Gun Triggering
To reducethe risk of a fluid injection injury, always
engage the guns' trigger safely latch before moving
disengage the trigger cableto the gun
(s) and
or adiustina the auns
or aun arms.
1. Align the front of the guns by adjusting the gun arms.
See page
17.
10 308-082
2.
3.
Position the dual gun selectorto trigger both guns.
See page 21.
Startthesprayer,usingwater,orspray on card-
board.
See page 13. Trigger the guns to see if the
lines begin at the same time and place.
It one oun tmbefore the other w, reduce the
cable tension
of the gun that triggers first. See Ad-
just the trigger cable tension on page 22.
If one line startsinfront of the othe
tionof the guns.
See page 17.
r. adjustthe posi-
Trigger the guns to recheck the adjustments.

Gun Arm Positions
SINGLE LINE
DOUBLE LINE
OR SINGLE LINE UP TO 24" WIDE
SINGLE
OR DOUBLE LINE SPRAYING AROUND OBSTACLES
ONE GUNCURB
TWO GUN CURB
DOUBLE LINE
OR SINGLE LINE UP TO 24"
WIDE
w11
308-082 19

Caster Lever and Cable Operation
1 A CAUTION
TheAccuTrack” casterisfactory-adjustedto track
ina straight line.Itshould not require adjustment
unlessit is replaced. If a lineistracking poorly. check
for the following items before aligning thecaster.
1. Evenbacktire pressure.
2. Eventension onthe rear tire bearings (adjust
3. Even tightnessof the caster screws (F).See
4. Unevenpaintingsurface.
nuts
(10) as needed.) See page 44.
Fig. 18.
5. Operatortechnique.
Operation
The normal operating modeof the AccuTrack” caster is
lockedinthe straight forward position.
1. Forafree moving caster: Squeeze and hold the cast-
er lever (22).
2. To lock the caster in the free movingposition,
squeeze the trigger, push In andholdthe the button
(A) and release the trigger.See Fig.
17.
3. To return to the normalmode, squeezeand release
the caster lever and move the Line Lazer forward to
lock thecasterinthe straight position.
Maintenance SeeFig. 18
Paint buildsup on the caster triggeringmechanism.To
keep it operating properly, useagrease gun at the grease
zerks (32A, 328) to flush out the buildup
- two to four
times a month, depending on use.
CasterTireReplacement SeeFig.18.
Remove the setscrews
(F) from the caster fork (E). Re-
move screw
(G) and the tire (114a). Installthe new tire
thetire has no playin it, buttumsfreely.
and the setscrews
(F). Tighten the setscrews equally SO
Caster Cable Tension Adjustment See Fig. 18.
1. Loosen the nut (A)locatedjust outside the carriage
clamp
(6).
2. Withthe pin (D) in thecaster fork (E),
pull back on the cable
(2) to increase thecableten-
sion, or push it forward to reduce the tension. Finger
tighten the nut
(H). Tighten the nut (A)firmly.
A for visual purposes
Shown removedonly A
A
Tighten equally so tire
has no play in
it but
turns freely
Fig. 18
Caster Alignment
Do this adjustment only if the caster or tire is replaced,
or if no other solutions to poor tracking are found.
1. Loosenthe
two capscrews (87), grasp the tire and
visually align
it. Tighten the capscrews evenly. Move
the unitforward. If the casterappears straight, start
the unit (use water)and spray along a true straight
line. Continue adjusting as necessary.See Fig. 18.
How To Mount the Gun
1. Relievepressure.Seepage 7.
2. Disengage the trigger cable. See page 21. Engage
the gun’s trigger safely latch
(6).
3. Loosenthe gun holder knob (93).
4. Position the gun so the gun trigger is restingonthe
5. Be surethatthegun is mounted straight and then
6. Disengagethegunsafelylatch.Engagetheremote 19
remote trigger lever (A).
tighten the knob (93) firmly.
trigger cable. Seepage21.
w208
20 308-082