Graco 231–132, 231–140, GM 3500 Instructions-parts List Manual
INSTRUCTIONS-PARTS LIST
308–082
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
GM 3500
GASOLINE-POWERED AIRLESS LINESTRIPER
LineLazer
3000 psi (210 bar, 21.0 MPa)
Maximum Working Pressure
Model 231–132, Series A
With one gun, RAC IVR DripLesst Tip guard,
Size 317 LineLazer Tip & Size 517 SwitchTipt,
and 50 foot (15 m) hose.
Model 231–140
Same as 231–132, except includes
Second Gun Kit, 224–097
First choice when
quality counts.
t
Rev. W
Supersedes Rev. V
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
0001F
Graco Inc. is registered to I.S. EN ISO 9001
Part Identification
Key
A Caster lever
B Dual gun selector
C Main hose
D Suction hose
E Fluid filter
F Pressure drain valve
G Arm
H Post
A
Z
B
Y
X
F
J Carriage bar
K Gun holder
L Rac IV tip guard
M Switch T ip
N Flex gun
O Displacement pump
P Caster
Q Dual gun selector cable
R Pressure control
S Spark plug cable
T Air Cleaner
U Muffler
V Fuel T ank
W Hook eyelet (use to strap
pail or pail cover to cart)
X Pail cover
Y Caster Cable
Z Grounding cable and
clamp
AA Collar
W
V
C
U
T
D
S
R
E
Q
G
H
O
P
AA
J
K
2 308-082
N
M
L
0001F
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. . . . . . . . . . . . . . . . . . . . . . .
Gasket Selection 15. . . . . . . . . . . . . . . . . . . . . . .
Installation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearing a Clogged Tip 15. . . . . . . . . . . . . . . . . .
Maintenance 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Spray Tip Selection 16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spray Tip Application Recommendations 16. .
Spray Techniques 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Width Adjustment 16. . . . . . . . . . . . . . . . . .
Positioning the Gun Arm Assembly 17. . . . . . . . . . . . . .
Vertical position of the first or second gun 17.
Horizontal position of the first gun 17. . . . . . . .
Horizontal position of the second gun 17. . . . .
Mount guns on the engine side of the cart 18.
Setup for spraying arcs 18. . . . . . . . . . . . . . . . .
Adjust Simultaneous Gun Triggering 18. . . . . . . . . . . . .
Gun Arm Positions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Lever & Cable Operation 20. . . . . . . . . . . . . . . . .
Operation 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 20. . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster Tire Replacement 20. . . . . . . . . . . . . . . .
Caster Cable Tension Adjustment 20. . . . . . . .
Caster Alignment 20. . . . . . . . . . . . . . . . . . . . . . .
How to Mount the Gun 20. . . . . . . . . . . . . . . . . . . . . . . . .
Gun Cable & Dual Gun Selector Operation 21. . . . . . . .
How the Dual Gun Selector Works 21. . . . . . . .
How to Release the Selector Cable 21. . . . . . .
Adjust the Trigger Cable Tension 22. . . . . . . . .
Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair or Replacement
Pressure Control 26. . . . . . . . . . . . . . . . . . . . . . .
Pressure Control Adjustment 27. . . . . . . . . . . .
Bearing Housing and Connecting Rod 28. . . . .
Drive Housing 29. . . . . . . . . . . . . . . . . . . . . . . . .
Pinion Housing 30. . . . . . . . . . . . . . . . . . . . . . . . .
Clutch 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field & Wiring Harness 34. . . . . . . . . . . . . . . . . .
Clamp 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clutch Housing Removal 35. . . . . . . . . . . . . . . .
Reassembly 36. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts
Pressure Control Parts 39. . . . . . . . . . . . . . . . . .
Cart Parts 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Parts 42. . . . . . . . . . . . . . . . . . . . . . .
Gun Mounting Parts 44. . . . . . . . . . . . . . . . . . . .
Pinion Parts 45. . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Change Summary
This manual has been updated to add items 194 – 196 and change item 2 to 240–484 from 238–361.
3308-082
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
INSTRUCTIONS
D This equipment is for professional use only.
D Read all instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are not sure, call your distributor.
D Do not alter or modify this equipment.
D Check equipment daily. Repair or replace worn or damaged parts immediately.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
equipment if you do not follow the instructions.
D Do not exceed the maximum working pressure of the lowest rated system component. Refer to the
Technical Data on page 46 for the maximum working pressure of this equipment.
D Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
D Do not use hoses to pull equipment.
D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).
D Do not lift pressurized equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
D Wear hearing protection when operating this equipment.
D Do not use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in pressurized aluminum equipment. Such use could result in a
chemical reaction, with the possibility of explosion.
4 308-082
WARNING
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 splashed in the eyes or on the skin can also
cause serious injury.
Fluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate medi-
cal attention.
Do not point the gun at anyone or at any part of the body.
Do not put your hand or fingers over the spray tip.
Do not stop or deflect leaks with your hand, body, glove or rag.
Do not “blow back” fluid; this is not an air spray system.
Always have the tip guard and the trigger guard on the gun when spraying.
Check the gun diffuser operation weekly. Refer to the gun manual.
Be sure the gun trigger safety operates before spraying.
Lock the gun trigger safety when you stop spraying.
Follow the Pressure Relief Procedure on page 7 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
Tighten all fluid connections before operating the equipment.
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.
Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by
kinks or bends near the couplings.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
Know the specific hazards of the fluid you are using.
Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
FUEL HAZARD
The fuel used in this unit is combustible and when spilled on a hot surface can ignite and cause a fire.
Do not fill the fuel tank while the engine is running or hot.
EXHAUST HAZARD
The exhaust contains poisonous carbon dioxide which is colorless and odorless.
Do not operate this equipment in a closed building.
5308-082
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
If there is any 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.
Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Disconnect all electrical equipment in the spray area.
Extinguish all open flames or pilot lights in the spray area.
Do not smoke in the spray area.
Do not turn on or off any light switch in the spray area while operating or if fumes are present.
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).
Use only electrically conductive hoses.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers.
Keep clear of all moving parts when starting or operating the sprayer.
Before servicing the equipment, follow the Pressure Relief Procedure on page 7 to prevent the
equipment from starting unexpectedly.
FIRE AND
EXPLOSION HAZARD
Spray painting, flushing or cleaning equipment with flammable
liquids in confined areas can result in fire or explosion.
Use outdoors or in extremely well ventilated areas. Ground
equipment, hoses, containers and objects being sprayed.
Avoid all ignition sources such as static electricity from plastic
drop cloths, open flames such as pilot lights, hot objects such as
cigarettes, arcs from connecting or disconnecting power cords
or turning light switches on and off.
Failure to follow this warning can result in death or serious injury.
READ AND UNDERST AND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE
SKIN INJECTION
HAZARD
Liquids can be injected into the body by high pressure airless
spray or leaks – especially hose leaks.
Keep body clear of the nozzle. Never stop leaks with any part of the
body . Drain all pressure before removing parts.Avoid accidental
triggering of gun by always setting safety latch when not spraying.
Never spray without a tip guard.
In case of accidental skin injection, seek immediate
“Surgical Treatment”.
Failure to follow this warning can result in amputation or serious
injury .
6 308-082
Setup
General Information
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and the
parts drawing.
NOTE: Always use Genuine Graco Parts and Accessories, available from your Graco distributor.
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE OR EXPLOSION HAZ-
ARD on page 6.
1.
Sprayer:
contacts the ground while the unit is moving. See
page 42. For stationary spraying, connect a
ground wire and clamp (159) to a true earth
ground.
2.
Fluid hoses:
maximum of 500 ft. (150 m) combined hose
length to ensure grounding continuity.
3.
Spray gun:
a properly grounded fluid hose and sprayer.
4.
Object being sprayed:
5.
Fluid supply container:
6.
Solvent pails used when flushing:
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the
pail on a nonconductive surface, such as paper or
cardboard, which interrupts the grounding continuity.
7.
To maintain grounding continuity when flushing or
relieving pressure
gun firmly to the side of a grounded
then trigger the gun.
make sure the grounding chain (106)
use only grounded hoses with a
obtain grounding through connection to
according to local code.
follow your local code.
follow your local
, hold a metal part of the spray
metal
pail,
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be injected through the skin and cause seri-
ous injury. To reduce the risk of an injury
from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
or install or clean the spray tips.
1. Engage the spray gun safety latch.
2. Turn the ON/OFF switch to OFF.
3. Flip the pressure control switch to OFF.
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to the side of a grounded metal
pail, and trigger the gun to relieve pressure.
5. Engage the gun safety latch.
6. Hold the pressure relief tube firmly to the side of a
grounded metal pail, and open the pressure relief
valve. Leave the valve open until you are ready to
spray again.
7. Disconnect the spark plug cable to prevent the
system from starting unexpectedly.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly
tip guard retaining nut or hose end coupling and relieve
pressure gradually, then loosen completely. Now clear
the tip or hose.
Valve shown in
CLOSED position.
Pressure
Valve shown
in OPEN position.
Hose
loosen the
159
Fig. 1
Fig. 2
Suction
Tube
Pressure
Relief Tube
06877
7308-082
Setup
1. Read and follow the warnings on pages 4 and 6
before installing or operating this sprayer.
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 (40A). Install one
screw (39B) and nut (40B) on each side of the handle. Firmly tighten all four nuts. See Fig. 3.
CAUTION
When raising the cart handle (19), be sure no cables
are caught on the frame or become kinked.
3. To install a second gun and hose, see page 11.
4. Fill the packing nut/wet–cup (216) 1/3 full with
Graco Throat Seal Liquid (TSL), supplied, and
keep it filled, to help extend the pump life. See
Fig. 4.
5. Check the engine oil level. Refer to the Honda
engine manual, supplied. This is a summary of the
information: Remove one of the oil fill plugs (A);
the oil should be almost overflowing. See Fig. 4.
Add oil as necessary. Also read the Maintenance
section on page 23.
7. Provide adequate ventilation when spraying indoors.
WARNING
If the LineLazer is used indoors, you must vent the
exhaust to the outdoors or provide adequate ventilation as specified by you local code. This is to
reduce the risk of carbon monoxide poisoning.
8. Fill the gas tank. See Fueling on page 10.
9. Flush the pump to remove the lightweight oil which
was left in the pump to protect it from rust. Follow the
Flushing on page 12.
10. Prepare the paint according to the manufacturer ’s
recommendations. Remove any skin that may have
formed. Stir the paint to mix pigments.
Strain the paint through a fine nylon mesh bag (available at most paint dealers) to remove particles that
could clog the filter or spray tip. This is an important
step toward trouble–free spraying.
Recommended engine oil: Use a high–quality , detergent oil, SAE 10W–40, classified “FOR SERVICE
SE or SF”.
6. Ground the sprayer. Proper grounding is essential to
maintaining an electrically safe system. Also read
and follow FIRE OR EXPLOSION HAZARD on page
6.
WARNING
Ground the sprayer whenever it is used indoors,
either as a moving line striper or as a stationary
sprayer. Floors in most factories are coated, which
causes them to be poor electrical conductors. This
increases the risk of hazardous static electric
discharge, which can result in serious injury, fire, or
explosion and property damage.
Whenever you flush: connect the ground clamp
(159) to a true earth ground.
Using as an outdoor striper: Be sure the static
chain attached to the bottom of the cart drags on the
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
operator movement. Therefore, the operator must
provide a longer ground wire or provide some other
method of effective electrical grounding as specified
by your local electrical code.
8 308-082
19
39A
40A
40B
39B
Fig. 3
Keep filled with TSL
Fig. 4
0007D
216
A
0008
Setup
11. Observe the following cautions to avoid pressure
control damage.
CAUTION
To avoid damaging the pressure control, follow these
precautions.
Allow the main hose to act as a pulsation damp-
ener: Always use nylon spray hose at least 50 ft.
(15 m) long for the main gun; Never use a wire
braid hose; it is too rigid.
Never install a ball valve or shutoff device be-
tween the filter and the 50 ft. (15 m) hose.
Do not allow water or water-base material to
freeze in the pressure control.
CAUTION
Close the black fuel shutoff lever whenever you are
transporting the sprayer to prevent fuel from flooding
the engine.
12. To use the wheel brake, lift the brake handle (A–
bottom rear of cart) to engage the brake. Lower
the handle to disengage the break. See Fig. 5. For
positive break engagement, be sure there is
proper tire pressure and that tire wear is not
excessive.
13. For how to operate and adjust the various features
of the LineLazer see pages 11 – 22.
14. Start the sprayer. See page 13.
A
Keep the sprayer upright and level when operating it
and transporting it. This prevents crankcase oil from
leaking into the combustion chamber, which makes
startup very difficult.
Fig. 5
03586
9308-082
Fueling
WARNING
Gasoline is extremely flammable and explosive
under certain conditions. To reduce the risk or a fire
or explosion:
1. Always shut off the engine before refueling.
NOTE: The HONDA engine warranty does not cover
damage resulting from the use of gasolines containing alcohol. See the HONDA engine manual for more information.
3. General. Do not use oil and gasoline mixtures or contaminated gasoline. Avoid getting dirt, dust or water
in the fuel tank.
2. Refuel in a well-ventilated area.
3. Do not smoke or allow flames or sparks in the
area where the engine is refueled or where
gasoline is stored.
4. Do not overfill the tank. Make sure the filler cap
is securely closed after refueling.
5. Fuel vapor or spilled fuel can ignite. If any fuel
is spilled during refueling, make sure the area
is dry before starting the engine.
1. Fuel specifications. Use automotive gasoline with
a pump octane number of 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 not contain cosolvents and corrosion inhibitors for methanol. Even if it does contain such
additives, do not use the gasohol if it contains
more than 5% methanol.
4. Tank capacity: 0.66 gallons (2.5 liter). Leave 1/2 in.
(13 mm) at the top of the tank for gas expansion.
5. Shut off the engine switch (A) before refueling.
6. After refueling, tighten the fuel tank cap (B) firmly.
B
Fig. 6
A
0009
10 308-082
Second Gun and Hose Installation
NOTE: Fig. 7 represents the installation at Step 3.
NOTE: To switch the gun assemblies to the engine side
of the cart, refer to the instructions on page 17 before installing the second gun kit.
1. Disengage the trigger cable from the block (48) of
the unit’s existing gun. See page 21. Engage the
gun’s trigger safety latch.
2. Loosen the carriage clamps (B, C). Slide the
carriage bar (4) off the cart.
3. For mounting the second gun bar on the pump
side of the cart: Slide a clamp (405A) onto the
carriage bar (4). Slide the carriage bar through the
pump-side carriage clamp (B) and into the center
of the cart. Now slide another clamp (405B) onto
the carriage bar. See Fig. 7.
For mounting the second gun bar on the engine side
of the cart: Follow Step 3, except slide the carriage
bar through the engine-side carriage clamp (C) and
the into the center of the cart. The knobs of the
clamps (405A, 405B) must face back toward the
handle bars.
4. Slide the carriage bar (4) through to the opposite carriage clamp. Tighten the carriage clamps (B,C).
5. Slide the second gun bar (404) far enough into the
carriage bar that the clamp (405B) engages the bar.
Position the clamps (405A, 405B) over the notches
(A) in the carriage bar (4) and tighten the clamps.
6. Disconnect the trigger cable from the second gun at
the screw (34). See Fig. 7 DETAIL B.
7. Unscrew the filter’s second outlet cap (14). Screw
the short hose (403) onto the filter nipple.
8. Remove the guide clamp screw (27).
9. Snap the cable bushing (E) into the guide plate (D).
Route the trigger cable (402) parallel with the main
gun cable, separating the guide clamp (104) to feed
the cable through it. Install and tighten the clamp
screw (27). Route the cable through the cable guide
(7) and to the second gun.
10. Slide the hooked end of the cable (402) through the
hole (F) in the lever plate (122). Rotate and slide the
hook back until it engages the plate. See DET AIL A.
11. Reconnect the trigger cable to the second gun at
screw (34). Torque the screw to 15 in–lb (1.7 N.m),
back it off 1/16 to 1/8 turn and then tighten the jam
nut (99) while holding the screw (34). Be sure the
plate (94) moves freely.
12. Install the clip (401) to hold the 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 the spray tip until the system is primed.
15. Adjust simultaneous gun triggering. See page 18.
NOTE: For stable gun operation, the second
gun bar (404) has a maximum recommended
extension from the carriage bar of about
11-1/4” (286 mm).
DETAIL A
HOW TO INSTALL CABLE
122
F
CORRECTL Y INSTALLED CABLE
T orque to 15 in–lb
(1.7 N.m)
and then back up
1/16 to 1/8 turn
First gun
Second gun
DETAIL B
34
Fig. 7
402
402
99
94
404
403
402
401
14
7
D
E
27,104
C
405B
4
A
B
405A
48
02490C
11308-082
Flushing
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Be sure the pump is properly grounded.
CAUTION
Never leave water in the sprayer if the is any chance
it could freeze. Push the water out with compatible
solvent. Water frozen in the pressure control tube
prevents the sprayer from being started, and causes
serious damage to the pressure control.
When to Flush
1. Flush a new sprayer to remove the protective oil.
Before using water–base paint, use compatible sol-
vent, then soapy water, and then clean water.
Before using oil–base paint, use compatible solvent.
WARNING
To reduce the risk of static sparking and splashing
when flushing, always remove the spray tip from
the gun, and hold a metal part of the gun firmly to
the side of, and aimed into, a grounded metal pail.
6. Follow Startup on page 13. Keep the gun triggered
until clean water or solvent comes from the nozzle.
See Fig. 9. Release the trigger and engage the gun
safety latch.
NOTE: If you have two guns, release the trigger safety
latch on the second gun and trigger that gun until clean
water or solvent 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 fluid connections for leaks. Relieve pressure before tightening any connections. Start the
sprayer. Recheck the connections for leaks.
8. Remove the suction tube from the solvent pail. Disengage the gun safety latch. T rigger the gun to force
water or solvent from the hose. Do not let the pump
run dry for more than 30 seconds to avoid damaging
the pump packings! Relieve pressure.
2. Changing colors. Use a compatible solvent.
3. Changing from water–base to oil–base paint. Use
warm, soapy water, and then a compatible solvent.
4. Changing from oil–base to water–base paint. Use a
compatible solvent, then warm, soapy water, and
then clean water.
5. Storage. After the compatible solvent flush, relieve
pressure, but do not drain the compatible solvent.
6. Startup after storage.
Before using water–base paint, flush out the compatible solvent with soapy water, and then with clean
water.
When using oil–based paint, flush out the compatible
solvent with the paint to be sprayed.
How to Flush
1. Relieve pressure.
2. Remove the filter bowl (A) and screen (B); see manual 307–273. Install the bowl and support (C), without
the screen, to flush it. Clean the screen separately.
See Fig. 8.
3. Close the pressure drain valve (13).
4. Put the suction tube in a grounded pail of water or
solvent.
13
A
B
C
Fig. 8
Maintain firm metal-
to-metal contact
when flushing to
reduce the chance
of static sparking
and splashing.
Fig. 9
9. If you have been spraying paint, remove the strainer,
suction tube and suction hose and clean them separately to be sure all paint sediment is removed. Dried
paint in the suction tube assembly can build up and
cause performance problems later on.
10. Install the clean filter screen. Install the filter bowl and
hand tighten.
0013
0014
5. Remove the gun(s) from the holder. Remove the
spray tip(s) to prevent splashing.
12 308-082
11. See Storage or Changing Colors, above. Relieve
pressure.
Startup
Before You Start the Linestriper
1. See Flushing, page 12, to determine if the Line Lazer
should be flushed.
2. Be sure the gas tank is full.
3. Check the engine oil level.
NOTE: The engine stops automatically, or will not start,
if it is low on oil. If you try to start it again without adding
more oil, a red light (A) near the engine on/off switch
glows as you pull the starter rope.
4. Be sure the spark plug cable (J) is firmly pushed onto
the spark plug.
Startup See Fig. 10
1. When starting a sprayer that IS NOT PRIMED, remove the spray tip.
2. Place the suction tube (S) into the paint, water or solvent container, depending on whether you are flushing or are ready to spray.
3. Open the black fuel shutoff lever (E) by pushing it in
the direction of the arrow.
CAUTION
Never start the engine unless fluid pressure is relieved and the pressure control switch is turned OFF.
Attempting to start the engine when it is pressurized
could damage the electrical system.
4. Turn OFF the pressure control switch (K).
5. To start the engine:
g. Open the choke as soon as the engine starts,
except in cold weather. In cold weather, leave
the choke closed for 10 to 30 seconds before
opening it to keep the engine running.
6. Release the trigger cable and engage the gun trigger
safety latch. See page 21.
7. Remove the gun from the holder by unscrewing the
gun holder knob and lifting out the gun.
8. To start the pump:
NOTE: Lower the throttle setting for easier priming.
a. Open the pressure drain valve (R).
b. Turn ON the pressure control switch (K).
c. Turn the pressure control knob (L) about 1/4
turn from minimum pressure. Run the pump
until fluid is flowing smoothly from the pressure
drain valve, indicating the pump is fully primed.
d. Close the pressure drain valve (R).
e. Disengage the gun safety latch. Hold a metal
part of the gun firmly against a grounded metal
pail, squeeze the trigger until fluid flows from
the gun.
f. Release the trigger. Engage the safety latch.
NOTE: If you are using two guns, follow Step e and f,
above, for the second gun.
9. If you have not primed the sprayer with paint yet,
move the suction tube (S) to the paint container. Release the trigger safety latch. Trigger the gun into the
water/solvent pail just until paint appears. Release
the trigger and engage the trigger safety latch. Repeat for the second gun, if two guns are used.
10. Place the pail cover (F) on the pail.
a. Turn the pressure adjusting knob (L) all the
way counterclockwise to the lowest pressure
setting.
b. Slide the metal throttle lever (C) away from the
fuel tank to the maximum position (fully left).
c. If the engine is cold, close the choke by mov-
ing the gray lever (D).
d. If the engine is warm, close the choke by
moving the gray lever (D) only half way or not
at all.
e. Turn ON the engine switch (B).
WARNING
A rope that recoils too quickly may hit someone
and cause serious bodily injury. The rope could
also jam in the 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.
Pull and return the rope until the engine starts.
WARNING
To reduce the risk or serious injury from fluid
injection, never operate the spray gun with the tip
guard removed.
11. Install the tip guard and spray tip (M). See page 15.
12. Mount the gun in the gun holder. See page 20.
13. Engage the trigger cable. See page 21.
CAUTION
Always use the lowest fluid pressure and the lowest
throttle setting needed. Higher settings cause excessive clutch cycling, premature tip wear and premature pump wear.
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
(L) until you get a good pattern. Then slowly lower the
throttle setting (C) as far as you can without changing
the spray pattern.
13308-082
Startup
15. Read Spray Techniques on page 16.
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 crankcase oil
from leaking into the combustion chamber, which
makes start up very difficult.
A
B
––AT REAR OF ENGINE––
H
R
Shown in
choked position
Shown off
Shown in
off position
KEY
A Engine Oil Light
B Engine On/Off Switch
C Throttle Lever
D Gray Choke Lever
E Black Fuel Shutoff Lever
F Pail Cover
G Starter Rope
H Air Cleaner
J Spark Plug Cable
K Pressure Control On/Off Switch
L Pressure Adjusting Knob
M SwitchT ip
N Rac IV Tip Guard
P Gun Trigger Safety Latch
Q Remote Trigger Cable
R Pressure Drain Valve
S Suction Tube
S
Fig. 10
14 308-082
D
E
F
G
H
J
C
K
L
Q
P
M
N
0001F
0001F
Spray Tip and Tip Guard
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
WARNING
Operation
WARNING
Keep clear of the nozzle! High pressure fluid from
leaks or spray can penetrate the skin and cause
extremely serious injury, including the need for
amputation. The spray tip guard provides extra
protection against injection, but does not prevent it!
Never cut off the spray tip guard.
Failure to install or use the RAC IV tip guard assembly correctly may result in an undirected spray
of paint into the eyes or on the skin of the operator.
Be sure you:
Use the appropriate gasket for the solvent used.
Fully insert the tip into the guard.
Fully tighten the guard onto the gun nozzle
using a wrench.
Turn the handle so it is parallel to the gun
nozzle.
When replacing a worn spray tip, always install
a new gasket and seat.
Gasket Selection
WARNING
To reduce the risk of fluid splashback into the eyes
or on the skin, use the appropriate gasket as
specified in the following text.
Use the black rubber gasket (D) ONLY with latex and
oil-based paints, stoddard solvents, mineral spirits, turpentine and water . When using this gasket, the spray tip
can be removed and replaced without using tools.
Use the red or yellow plastic gasket (C) with the same
fluids as above and with most other solvents, including
lacquer thinner, trichloroethylene, MEK, acetone, brush
cleaner, xylol. When using this gasket, loosen the RAC
IV retaining nut to remove the spray tip.
Installation
Relieve pressure. Install a tip (F) so the flange (G) on the
cylinder fits into the slots (H) at the base of the spray tip
guard (J). See Fig. 11.
Be sure the spray tip handle is in the FULL SPRA Y position before operating the gun. See Fig. 11.
Clearing a Clogged Spray Tip
Disengage the trigger cable(s). Engage the gun safety
latch. Turn the arrow handle to the FULL CLEAN position. See Fig. 13. Release the safety latch and trigger the
gun. Fluid pressure should force out the clog. Return the
arrow handle to the full spray position.
clogged
page 7 and remove the spray tip for cleaning.
, follow the Pressure Relief Procedure on
If it is still
Maintenance
Change the seat and gasket when the spray tip wears
out; these parts wear at about the same rate.
C
RED or YELLOW
J
Fig. 11
Fig. 12
GUN NOZZLE
A
E
F
G
H
E
A
F
D
BLACK
0091
0092
Place the seat (E) on a pencil, curved side out, as shown
in Fig. 12. Guide the seat into the retaining nut (A) and
turn the seat until it straddles the cylinder of the spray tip
(F). Drop in the appropriate gasket and press it down. If
using the red or yellow gasket (C), be sure the flat side
faces out of the retainer (A). See Fig. 11.
Screw the spray tip guard snugly onto the gun, holding
it in the desired position while tightening retaining nut (A).
NEVER use a wrench to turn the plastic tip guard (J), to
avoid damaging the guard.
RAC IV
DripLess
TIP GUARD
Fig. 13
TIP
HANDLE
FULL CLEAN POSITIONFULL SPRAY POSITION
0093
15308-082
Loading...