Airlessco MP 400/300, Mustang 4800 Airless Paint Sprayer User manual

Airlessco MP 400/300, Mustang 4800 Airless Paint Sprayer User manual

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Below you will find brief information for Airless Paint Sprayer MP 400/300, Airless Paint Sprayer Mustang 4800. The Airless Paint Sprayer MP 400/300 and Airless Paint Sprayer Mustang 4800 are designed for portable application of paints and coatings. They are for professional use only and are not approved for use in European explosive atmosphere locations. This manual covers the setup, operation, and maintenance of these sprayers.

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Airless Paint Sprayer MP 400/300, Mustang 4800 User Manual | Manualzz
Operation/Repair/Parts
MP 400/300
Mustang 4800
Airless Paint Sprayer
332882D
EN
For portable application of architectural paints and coatings. For professional use only.
Not approved for use in European explosive atmosphere locations.
3000 psi (20.7 MPa, 207 bar) Maximum Working Pressure
IMPORTANT SAFETY INSTRUCTIONS
Read all warnings and instructions in this manual and in gun manual.
Be familiar with the controls and the proper usage of the equipment.
Save all instructions.
See page 3 for model information.
Related Manuals:
Gun Manual
312363 - English
312364 - Spanish
312365 - French
ti22320a
ti22317a
Hi-Boy Model
Stand Model
3172585
Certified to CAN/CSA C22. No. 68
Conforms to UL 1450
Contents
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Component Identification . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pressure Relief Procedure . . . . . . . . . . . . . . . . 10
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Prime and Flush Storage Fluid . . . . . . . . . . . . . 11
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Clearing Clogs . . . . . . . . . . . . . . . . . . . . . . . . . 13
Adjusting the Pressure . . . . . . . . . . . . . . . . . . . 13
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Daily Maintenance . . . . . . . . . . . . . . . . . . . . . . . 14
Electric Motor Maintenance . . . . . . . . . . . . . . . . 14
Servicing the Fluid Pump . . . . . . . . . . . . . . . . . . 14
Fluid Pump Disconnect . . . . . . . . . . . . . . . . . . . 14
Servicing the Inlet Valve - Hi-Boy . . . . . . . . . . . 16
Servicing the Inlet Valve - Stand . . . . . . . . . . . . 16
Packing Replacement Procedures . . . . . . . . . . 16
Gear and Pump Assembly . . . . . . . . . . . . . . . . . 18
Replacement of Electrical Components . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Manifold Filter (868014) . . . . . . . . . . . . . . . . . . . 22
Inlet Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Stand Frame Parts Diagram . . . . . . . . . . . . . . . 23
Hi-Boy Parts Diagram . . . . . . . . . . . . . . . . . . . . 24
Control Parts Diagram . . . . . . . . . . . . . . . . . . . . 25
Motor and Drive Parts Diagram . . . . . . . . . . . . . 26
Drive Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Packing Replacement . . . . . . . . . . . . . . . . . . . . 28
Suction Assemblies . . . . . . . . . . . . . . . . . . . . . . 29
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . 30
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Airlessco Standard Warranty . . . . . . . . . . . . . . . . 32
332882D
Models
Models
Model Model No. Series Hi-Boy
MP300 868058
A
868050
A
868051
A
x
868054
A
A
MP400 868055
868056
A
868057
A
868060
A
A
Mustang 868052
4800
868053
A
x
332882D
Stand
x
x
x
x
x
x
x
x
120V
240V Euro 220V CN
x
220V LA
220V AP 230V ANZ
x
x
x
x
x
x
x
x
x
3
Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
WARNING
GROUNDING
This product must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This product is equipped with a cord
having a grounding wire with an appropriate grounding plug. The plug must be plugged into an outlet that
is properly installed and grounded in accordance with all local codes and ordinances.
•
•
•
•
•
•
Improper installation of the grounding plug is able to result in a risk of electric shock.
When repair or replacement of the cord or plug is required, do not connect the grounding wire to either
flat blade terminal.
The wire with insulation having an outer surface that is green with or without yellow stripes is the
grounding wire.
Check with a qualified electrician or serviceman when the grounding instructions are not completely
understood, or when in doubt as to whether the product is properly grounded.
Do not modify the plug provided; if it does not fit the outlet, have the proper outlet installed by a qualified electrician.
This product is for use on a nominal 120V circuit and has a grounding plug similar to the plug illustrated
in the figure below.
120V US
• Only connect the product to an outlet having the same configuration as the plug.
• Do not use an adapter with this product.
Extension Cords:
• Use only a 3-wire extension cord that has a grounding plug and a grounding receptacle that accepts
the plug on the product.
• Make sure your extension cord is not damaged. If an extension cord is necessary, use 12 AWG (2.5
mm2) minimum to carry the current that the product draws.
• An undersized cord results in a drop in line voltage and loss of power and overheating.
4
332882D
Warnings
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent
fire and explosion:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Do not spray or clean with materials having flash points lower than 100° F (38° C). Use only non-flammable or water-based materials, or non-flammable paint thinners. For complete information about your
material, request the SDS from the material distributor or retailer.
Do not spray flammable or combustible materials near an open flame or sources of ignition such as cigarettes, motors, and electrical equipment.
Paint or solvent flowing through the equipment is able to result in static electricity. Static electricity creates a risk of fire or explosion in the presence of paint or solvent fumes. All parts of the spray system,
including the pump, hose assembly, spray gun, and objects in and around the spray area shall be properly grounded to protect against static discharge and sparks. Use Graco conductive or grounded
high-pressure airless paint sprayer hoses.
Verify that all containers and collection systems are grounded to prevent static discharge. Do not use
pail liners unless they are anti-static or conductive.
Connect to a grounded outlet and use grounded extension cords. Do not use a 3-to-2 adapter.
Do not use a paint or a solvent containing halogenated hydrocarbons.
Do not spray combustible liquids in a confined area.
Keep spray area well-ventilated. Keep a good supply of fresh air moving through the area.
Spray generates sparks. Keep pump assembly in a well-ventilated area at least 20 feet (6.1 m) from the
spray area when spraying, flushing, cleaning, or servicing. Do not spray pump assembly.
Do not smoke in the spray area or spray where sparks or flame is present.
Do not operate light switches, engines, or similar spark producing products in the spray area.
Keep area clean and free of paint or solvent containers, rags, and other flammable materials.
Know the contents of the paints and solvents being sprayed. Read all Safety Data Sheets (SDS) and
container labels provided with the paints and solvents. Follow the paint and solvents manufacturer’s
safety instructions.
Fire extinguisher equipment shall be present and working.
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause electric
shock.
•
•
•
•
•
332882D
Turn off and disconnect power cord before servicing equipment.
Use only grounded electrical outlets.
Use only 3-wire extension cords.
Ensure ground prongs are intact on power and extension cords.
Do not expose to rain. Store indoors.
5
Warnings
WARNING
SKIN INJECTION HAZARD
High-pressure spray is able to inject toxins into the body and cause serious bodily injury. In the event that
injection occurs, get immediate surgical treatment.
•
•
•
•
•
•
•
•
•
•
•
Do not aim the gun at, or spray any person or animal.
Keep hands and other body parts away from the discharge. For example, do not try to stop leaks with
any part of the body.
Always use the nozzle tip guard. Do not spray without nozzle tip guard in place.
Use Graco nozzle tips.
Use caution when cleaning and changing nozzle tips. In the case where the nozzle tip clogs while
spraying, follow the Pressure Relief Procedure for turning off the unit and relieving the pressure
before removing the nozzle tip to clean.
Equipment maintains pressure after power is shut off. Do not leave the equipment energized or under
pressure while unattended. Follow the Pressure Relief Procedure when the equipment is unattended
or not in use, and before servicing, cleaning, or removing parts.
Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
This system is capable of producing 3000 psi. Use Graco replacement parts or accessories that are
rated a minimum of 3000 psi.
Always engage the trigger lock when not spraying. Verify the trigger lock is functioning properly.
Verify that all connections are secure before operating the unit.
Know how to stop the unit and bleed pressure quickly. Be thoroughly familiar with the controls.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•
•
•
•
•
•
•
•
•
•
•
Always wear appropriate gloves, eye protection, and a respirator or mask when painting.
Do not operate or spray near children. Keep children away from equipment at all times.
Do not overreach or stand on an unstable support. Keep effective footing and balance at all times.
Stay alert and watch what you are doing.
Do not operate the unit when fatigued or under the influence of drugs or alcohol.
Do not kink or over-bend the hose.
Do not expose the hose to temperatures or to pressures in excess of those specified by Graco.
Do not use the hose as a strength member to pull or lift the equipment.
Do not spray with a hose shorter than 25 feet.
Do not alter or modify equipment. Alterations or modifications may void agency approvals and create
safety hazards.
Make sure all equipment is rated and approved for the equipment in which you are using it.
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical
reaction and equipment rupture. Failure to follow this warning can result in death, serious injury, or property damage.
• Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids
containing such solvents.
• Do not use chlorine bleach.
• Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier
for compatibility.
6
332882D
Warnings
WARNING
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
•
•
•
Keep clear of moving parts.
Do not operate equipment with protective guards or covers removed.
Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure and disconnect all power sources.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swallowed.
•
•
Read Safety Data Sheet (SDS) to know the specific hazards of the fluids you are using.
Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not limited to:
•
•
Protective eyewear, and hearing protection.
Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
CALIFORNIA PROPOSITION 65
This product contains a chemical known to the State of California to cause cancer, birth defects or other
reproductive harm. Wash hands after handling.
332882D
7
Component Identification
Component Identification
E
D
B
C
8
A
ti22321a
A
Power switch
Turns sprayer ON and OFF
B
Pressure Control Knob
Adjusts pressure. Turn clockwise to increase pressure and counterclockwise to decrease pressure.
C
Prime Valve
Primes pump.
D
Prime Valve Open Position
Valve is in open position when handle is in the vertical position.
E
Prime Valve Closed Position
Valve is in closed position when handle is in the horizontal position.
332882D
Operation
Operation
Grounding
The equipment must be grounded to reduce the risk
of static sparking and electric shock. Electric or static
sparking can cause fumes to ignite or explode.
Improper grounding can cause electric shock.
Grounding provides an escape wire for the electric
current.
TIC
Do not modify the plug provided; if it does not fit the
outlet, have the proper outlet installed by a qualified
electrician.
Air and fluid hoses: use only electrically conductive
hoses with a maximum of 500 ft. (150 m) combined
hose length to ensure grounding continuity. Check electrical resistance of hoses. If total resistance to ground
exceeds 29 megohms, replace hose immediately.
Spray gun: ground through connection to a properly
grounded fluid hose and pump.
Fluid supply container: follow local code.
Object being sprayed: follow local code.
Solvent pails used when flushing: follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a non-conductive surface, such as paper or cardboard, which interrupts
grounding continuity.
Extension Cords: Use an extension cord with an
undamaged ground contact. If an extension cord is necessary, use a 3-wire, 12 AWG (2.5 mm2) minimum.
NOTE: Smaller gauge or longer extension cords may
reduce sprayer performance.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the spray
gun/dispense valve firmly to the side of a grounded
metal pail, then trigger the gun/valve.
The sprayer cord includes a grounding wire with an
appropriate grounding contact.
The plug must be plugged into an outlet that is properly
installed and grounded in accordance with all local
codes and ordinances.
332882D
9
Operation
Pails
Pressure Relief Procedure
Solvent and oil/based fluids: follow local code. Use
only conductive metal pails, placed on a grounded surface such as concrete.
Follow this Pressure Relief Procedure whenever you
stop spraying and before cleaning, checking, servicing,
or transporting equipment.
Do not place pail on a non-conductive surface such as
paper or cardboard which interrupts grounding
continuity.
Grounding a metal pail: connect a ground wire to the
pail by clamping one end to pail and other end to a true
earth ground such as a water pipe.
1. Engage the gun trigger lock. Refer to the separate
instruction manual provided with gun for safety features and how to engage the trigger lock.
2. Turn the unit off.
3. Disengage the gun trigger lock and trigger the gun
to relieve residual fluid pressure.
Hold metal part of the gun in contact with grounded
metal pail. Use minimum pressure.
ti5851a
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of spray gun firmly
to side of a grounded metal pail. Then trigger gun.
ti15989a
4. Re-engage gun trigger lock and turn Prime Valve to
the open (priming) position.
Closed
(Pressure)
Open
(Priming)
ti5310b
ti17403a
NOTE: The valve handle can move both clockwise and
counter clockwise and can face different directions.
NOTE: If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after following
the steps above, VERY SLOWLY loosen tip guard
retaining nut or hose end coupling to relieve pressure
gradually, then loosen completely. Clear hose or tip
obstruction.
10
332882D
Operation
Setup
Oil- or Water-based Materials
To reduce the risk of static sparking, fire or explosion
which can result in serious bodily injury and property
damage. Always ground the sprayer and system
components and the object being sprayed. Ensure
proper electrical service and amperage and that the
outlet is properly grounded.
M
•
When changing from water-based material to oil
based material, flush with soapy water and then
mineral spirits.
•
When changing from oil based material to water
base material, flush with mineral spirits, followed by
soapy water, then a clean water flush.
•
When flushing with solvents, ground pail and gun.
•
Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
Connect the hose and gun
1. Remove the plastic cap plug from the outlet and
screw a conductive or grounded 3000 psi spray
hose onto fluid outlet.
Flushing
2. Connect an airless spray gun to the other end of the
hose. Do not install spray tip.
M
M
Fill the Packing Nut/Wet Cup
•
1. Remove guard and cap.
2. Fill the Packing Nut/Wet Cup with 5 drops of Throat
Seal Oil (TSO) or Packing Seal Fluid.
ti16049a
•
To reduce the risk of static sparking, which can
cause fire or explosion, always hold a metal part
of the gun firmly against the metal pail when flushing. This also reduces splashing.
To reduce risk of injection, always remove the
spray tip before flushing to avoid.
1. Make sure the gun trigger lock is engaged and there
is no spray tip in the gun. Refer to the separate
instruction manual provided with gun for safety features and how to engage the trigger lock.
Flush the Sprayer
1. Flush the sprayer. See Flushing Procedure on
page 11.
Prime and Flush Storage Fluid
NOTICE
The equipment was tested with lightweight oil, which
is left in the fluid passages to protect parts. To avoid
contaminating your fluid with oil, flush the equipment
with a compatible solvent before using the equipment
for the first time.
Before beginning a new spraying project you need to
prime the sprayer and flush the storage fluid out of the
sprayer.
332882D
ti16028a
2. Pour enough clean, compatible solvent into a large,
empty metal pail to fill the pump and hoses.
3. Place the suction tube into the pail or place the pail
under the pump.
11
Operation
12. If you are going to store the sprayer see Storage,
page 13. Engage the gun trigger lock.
4. Turn Pressure Control Knob to low.
13. Whenever shutting down the sprayer, follow Pressure Relief Procedure, page 10.
NOTICE
To prevent damage and freezing during storage,
never leave water in the fluid pump
ti22322a
5. Open the prime valve to the open (priming) position.
This will allow an easy start.
Closed
(Pressure)
Open
(Priming)
Startup
1. Prepare the material according to the material manufacturer’s recommendations.
2. Place the suction tube into the material container.
3. Start the sprayer.
a. Prime Valve must be in the open (priming) position.
ti17403a
6. Turn the power ON/OFF switch to ON.
7. Point the gun into the metal pail and hold a metal
part of the gun firmly against the pail. Maintain firm
metal to metal contact between gun and container.
b. After ensuring the gun trigger lock is engaged,
attach tip and safety guard.
c.
Turn the power ON/OFF switch to the “ON”
position.
d. Turn the Pressure Control Knob clockwise to
prime the pump.
e. After the pump is primed, turn the Prime Valve
to the “CLOSED” position.
f.
Turn Pressure Control Knob to the desired
spray pressure.
ti15989a
8. Disengage the gun trigger lock and squeeze the
trigger. At the same time, slowly turn the pressure
control knob clockwise, just enough to move liquid
at low pressure.
g. Disengage the gun trigger lock to begin spraying.
4. To stop the unit in an emergency, turn the engine
off. then relieve the fluid pressure in the pump and
hose. See Pressure Relief Procedure, page 10.
9. Allow the pump to operate until clean solvent comes
from the gun.
10. Release the trigger and engage the gun trigger lock.
11. If you are going to start spraying, place the pump or
suction tube into the supply container. Release the
gun trigger lock and trigger the gun into another
empty, metal container, holding a metal part of the
gun firmly against the metal pail, forcing the solvent
from the pump and hose. When paint starts coming
from gun, turn pressure control knob to minimum
pressure, place prime valve in prime (open) position
and engage the gun trigger lock.
12
332882D
Operation
Clearing Clogs
Shutdown
1. Relieve Pressure, page 10.
2. Clean the tip and gun as recommended in the separate Gun Manual supplied with the gun.
1. Release trigger. Engage trigger lock. Rotate Spray
Tip. Disengage trigger lock. Trigger gun at waste
area to clear clog.
3. If spraying water-based material or a material that
could harden in the sprayer overnight, flush the
sprayer after use. See Flushing, page 11.
Storage
Short Term
ti10166a
ti22227a
ti10167a
2. Engage trigger lock. Return Spray Tip to original
position. Disengage trigger lock and continue
spraying.
1. Flush sprayer with compatible solvent before storing, then fill the pump and hoses with an oil based
solvent such as mineral spirits.
•
•
For oil base paint: flush with mineral spirits
For water-base paint: flush with water, then mineral spirits and leave the pump, hose and gun
filled with mineral spirits.
Long Term
ti10166a
ti22226a
ti10167a
Adjusting the Pressure
For longer storage, use Graco Pump Armor or mineral
spirits. Shut off sprayer, Relieve Pressure, page 10,
and make sure prime valve is left open.
Start Up After Storage
To reduce the risk of injection, never hold your hand,
body, fingers or hand in a rag in front of the spray tip
when cleaning or checking for a cleared tip. Always
point the gun toward the ground or into a waste container when checking to see if the tip is cleared or
when using a self cleaning tip.
Before using water-base paint, flush sprayer with soapy
water and then a clean water flush. When using oil-base
paint, flush out the mineral spirits with the material to be
sprayed.
NOTE: Always store unit indoors.
When adjusting the pressure, turn the Pressure Control
Knob clockwise to increase pressure and counterclockwise to decrease pressure. Always use the lowest pressure necessary to completely atomize the material. If
more coverage is needed, use a larger tip rather than
increasing the pressure.
NOTE: Operating the sprayer at higher pressure than
needed wastes material, causes early tip wear, and
shortens sprayer life.
NOTE: Check the spray pattern. The tip size and angle
determines the pattern width and flow rate.
332882D
13
Maintenance
Maintenance
Daily Maintenance
1. Keep the displacement pump packing nut/wet cup
lubricated with Throat Seal Oil (TSO) or Packing
Seal Fluid at all times. The oil or fluid help protect
the rod and packings.
2. Inspect the packing nut daily. If seepage of paint
into the packing nut and/or movement of the piston
upward is found (while not spraying), the packing
nut should be tightened just enough to stop leakage
(torque is 24 in-lbs). Over tightening will damage the
packings and reduce the packing life.
Electric Motor Maintenance
9. To increase brush life, new brushes (Part # 331780)
need to have a run in period. After changing
brushes, set the machine for spraying. With a
bucket of Pump Conditioner and water, a 50’ 1/4”
airless hose, airless gun and tip on unit, open the
prime valve and power on. The pump will now
prime. With pump running in the prime mode, turn
the pressure control knob to high pressure. (The
pump has to cycle fast with no pressure in the
pump). Run the pump for 20 minutes and the
brushes will be run in.
Brush Kit
331780
Lubrication
The motor is supplied with pre-lubricated ball bearings,
lubricated for the life of the bearing.
ti16051a
Servicing the Fluid Pump
Motor Brushes
Motor brushes need periodic inspection and replacement as wear indicates. Standard brushes have an initial length of 1” and should be replaced when they are
worn to a length of 1/2”. Brush wear is greatly influenced
by individual application and it is recommended that
brush wear be checked at early intervals of operation in
order to determine future required inspection.
To change the brushes:
1. Disconnect power from the unit.
Fluid Pump Disconnect
1. Relieve Pressure, page 10.
2. Flush the material you are spraying out of the
machine.
3. Remove the connecting rod shield(12).
2. Remove the cover over the motor, if applicable.
4. Move the piston rod (10) to its lowest position by
cycling pump slowly.
3. Open the two covers at the rear of the motor.
5. Turn off the motor and disconnect power from unit.
4. Disconnect the brush wire.
6. Remove the retaining ring (4) from the connecting
rod (2) and slide the sleeve (3) down revealing the
connecting rod pin (1).
5. Pull out the wire.
6. Push the brush retainer clip in and withdraw.
7. Remove the worn brushes.
8. Install new brushes in the reverse order.
7. Remove the suction tube assembly from the fluid
pump (9) by unscrewing the suction nut (7) with the
packing adjustment tool. (865008).
8. Using a 1/2” wrench, unscrew the two bolts (8) from
the cover assembly (14). The fluid pump (9) will be
hanging loosely at this point.
9. Remove the connecting rod pin (1) out of the connecting rod (2), allowing the removal of the fluid
pump (9) from the machine.
14
332882D
Maintenance
Fluid Pump Reinstall
1. Loosen the packing nut and ensure that the piston
rod (10) is in its upper position in the fluid pump
body, snap cap onto packing nut and slip the sleeve
(3) and the retaining ring (4) over the piston rod
(10).
2. Push the piston rod (10) up into the connecting rod
(2) and align the holes. Insert the connecting rod pin
(1) through the connecting rod (2) and piston. Slip
the sleeve (3) up over the connecting rod pin (1) and
insert the retaining ring (4) into the groove on the
connecting rod (2).
3. Push the two bolts (8) through the tube spacers (11)
and screw them into the cover assembly. Using a
1/2” wrench, tighten the two bolts (8) evenly (alternating between them) to 20 ft-lbs (27.1 N•m).
4. For Hi-Boy: Reassemble lower suction valve
assembly by placing the suction seat, O-ring, suction ball and suction ball guide in the suction nut (7)
and screw onto fluid pump body.
For Stand: Reassemble lower suction valve assembly by placing the o-ring, PTFE-ring on stop of ball
cage, o-ring on bottom of ball cage in the suction nut
(7) and screw onto fluid pump body.
5. Reconnect the pressure control knob and fitting to
the fluid pump body.
ti22323b
6. Start the machine and operate slowly to check the
piston rod (10) for binding. Adjust the two bolts (8),
holding the fluid pump body to the cover assembly,
if necessary. This will eliminate any binding.
7. Tighten packing nut clockwise until resistance is felt
against the Belleville Springs, go 3/4 of a turn more.
Put five drops of Throat Seal Oil or Packing Seal
Fluid in the packing nut.
8. Run the machine at full pressure for several minutes. Release the pressure by following the Pressure Relief Procedure, page 10, and readjust the
packing nut per step 7 above.
9. Install the connection rod shield (12).
332882D
15
Maintenance
Servicing the Inlet Valve - Hi-Boy
1. Relieve Pressure, page 10. Disconnect power from
unit.
Packing Replacement
Procedures
Disassembly of the Fluid Pump
2. Un-thread and remove suction nut from the fluid
pump body (8).
1. Disconnect the Fluid Pump, page 14.
3. Remove suction seat assembly (12).
2. Unscrew and remove the packing nut, with wet cup
cap.
4. Clean all parts and inspect them for wear or damage, replacing parts as needed.
5. Clean inside of the fluid pump body (8).
6. Reassemble lower suction valve assembly by placing the suction seat assembly (12) in the suction nut
(13) and screw onto fluid pump body (8).
3. Push the piston rod down through the packings and
out of the pump.
4. Push the packing removal tool up through the pump
and remove from the top, bringing packings, spacer
and springs along with it, leaving fluid body empty.
Make sure all old packings and glands have been
removed from fluid pump.
5. Clean inside of fluid body.
Stand Model
8
159
160
157
9
10
11
7. Lubricate leather packing in lightweight oil for 10
minutes prior to reassembly.
Reassembly of the Fluid Pump
1. Place lower male gland (1) down on the flat side.
158
12
13
ti16056b
Servicing the Inlet Valve - Stand
1. Relieve Pressure, page 10. Disconnect power from
unit.
2. Un-thread and remove suction nut from the fluid
pump body (8).
3. Remove O-ring (158), suction seat assembly (157),
O-ring (159) and backup ring (160).
4. Clean all parts and inside fluid body (8).
5. Reassemble inlet valve with O-ring (159), backup
ring (160) and O-ring (158).
6. Tighten suction nut using packing adjustment tool
(865008).
16
6. Disassemble all parts and clean for reassembly.
Discard any old packings.
2. Take three of the lower polyethylene packings (2)
and two of the leather packings (23) and place onto
the male gland (1), with the inverted side down, in
the following order:
•
•
•
•
•
Polyethylene
Leather
Polyethylene
Leather
Polyethylene
3. Take the female adapter (3), which is inverted on
both sides, and place it on top of your assembled
lower packings.
4. Follow step 2 with your packings inverted side up.
5. Take the second lower male gland (1) and place it
on top of your assembled packings with rounded
side down.
6. Take assembled glands and packings (13 pieces)
and slide onto the lower half of the piston (14).
7. Take the spacer (15) and slide over the top of the
piston (14).
332882D
Maintenance
8. Take three spring washers (16) and slide over the
top of the piston (14) in the following order:
•
•
•
18. Reinstall Fluid Pump, page 15.
First spring - curve facing up
Second spring - curve facing down
Third spring - curve facing up
9. Take the upper male gland (17) and place it
rounded side up.
10. Take three upper polyethylene packings (18) and
two leather packings (22) and assemble with
inverted side down, on to the male gland (17) in the
following order:
•
•
•
•
•
Polyethylene
Leather
Polyethylene
Leather
Polyethylene
11. Take upper female gland (19) and place on top of
assembled upper packings with the inverted side
down.
12. Take assembled upper glands and packings (7
pieces) and slide on over the top of the piston (14),
making sure inverted sides are down.
13. Take the packing holder (20) and replace the white
O-ring (24) and the black O-ring (25) with new ones
from the packing kit.
1
26
21
2
20
25
23
3
24
2
19
18
18
22
22
1
17
Stand model
16
16
4
15
14. Slide the packing holder (20) over the top fo the
upper packings so they fit inside.
15. Lubricate inside of the fluid pump body (4) and the
outside of the packings with a light weight oil.
5
159
6
160
7
157
16. Slide assembly into fluid pump body.
14
NOTE: To keep packings secured in correct position,
hold the pump body upside down and push the completed assembly upwards into the pump body. Once
placed inside, tilt pump body back up to keep all pieces
in.
13
11
12
8
158
9
ti16115b
10
17. Tighten packing nut (21) onto the top of the fluid
pump body and tighten until you feel slight resistance against the Belleville Springs (16). Using the
Packing Adjustment Tool, tighten another 3/4 of a
turn.
332882D
17
Maintenance
Gear and Pump Assembly
Servicing Gear box Assembly
7. Clean mating surfaces of cover and box thoroughly.
Apply adhesive on half the bottom surface of end
bell.
8. Reassemble in reverse order.
1. Remove fluid pump. See Fluid Pump Disconnect,
page 14.
1
2
2. Remove frame from the gearbox by loosening the
four mounting screws.
16 17
3. Separate cover assembly (13) from box by removing bolts (1) from front of cover and back of box and
shoulder bolts (2) from front of cover and back of
box.
4. Lay unit on its back and disassemble gearbox.
5. Inspect bearings (14, 17), Crosshead Assembly
(15), Gearcrank (16) and sleeve bearing inside the
cover assembly (13) for wear/damage. Replace
worn/damaged parts.
13 14 15
2
8
11
5
1
4
6
12
6. If gear grease needs replacing, replace with gear
grease (Part No. 114819).
10
18
ti22326a
332882D
Maintenance
Replacement of Electrical
Components
To avoid electric shock, always unplug the electrical
cord before servicing the machine.
NOTE: Anytime the pressure control assembly, sensor,
or both are replaced, perform the calibrations.
Pressure Control Assembly (Electrical
Control Board)
1. Unplug machine’s power cord.
2. Remove two screws from terminal box.
3. Disconnect all leads from pressure control assembly.
NOTICE
Unit will not operate if wires are disconnected or
pinched. Upon reassembly, ensure all wires are
connected and not pinched.
On-Off Toggle Switch
1. Lower the pressure control assembly as described
above.
2. Disconnect the two wires on the toggle switch.
3. Use a 9/16” wrench to loosen the nut on the toggle
switch shaft.
4. Reassemble in reverse order.
NOTICE
Unit will not operate if wires are disconnected or
pinched. Upon reassembly, ensure all wires are
connected and not pinched.
4. Reassemble in reverse order.
NOTE: Ensure ground lead (A) is connected to bolt
below control board.
ti22483a
332882D
19
Troubleshooting
Troubleshooting
Problem
Unit doesn’t prime
Cause
Solution
Air leak due to loose suction nut Tighten suction nut.
Air leak due to worn o-rings
For Hi-Boy: Replace o-ring (108526) on suction seat and o-ring (867370) below suction
seat.
For Stand: Replace o-ring (120777) on suction
seat and o-ring (121370) below suction seat.
Unit primes but has poor or no
pressure
Unit does not maintain good
spraying pressure
Unit does not run
20
Air leak due to hole in suction
hose
Replace suction hose.
Stuck or fouled balls
Service inlet and outlet valves.
Pressure set too low
Turn up pressure.
Filter(s) are clogged
Clean or replace gun filter, inlet filter, and/or
manifold filter.
Outlet valve fouled/worn.
Service outlet valve.
Prime valve bypassing
Clean or replace prime valve (866428).
Packings and/or piston worn
Tighten packing nut, repack unit.
Worn spray tip
Replace spray tip.
Packings and/or pistons worn
Repack unit.
Upper seat worn
Replace upper seat.
Blown fuse
Replace fuse:
120V models: 12.5A time delay fuse
220V - 240V models: 8A time delay fuse
332882D
Troubleshooting
Problem
Machine does not start
Cause
Solution
Control Settings
Make sure machine is plugged into the wall.
Verify the on-off switch is in the ON position
and the pressure control knob is turned all the
way to the right (clockwise for maximum pressure).
Pressure Control Assembly
(Board)
If the power indicating light is still out after
checking the control settings and power source,
replace the pressure control assembly.
Motor
Remove the motor brush covers and turn the
machine ON. Set the pressure control at maximum pressure and check for DC voltage across
both brush terminals. It should read greater
than 80 volts DC.
If you have DC voltage, turn the machine off
and unplug it from the wall. Check to make sure
the brushes are making good contact with the
armature. Replace the brushes if they are less
than 1/2” long. If the brushes are good, replace
the motor.
332882D
21
Parts
Parts
Manifold Filter (868014)
Model 868057
1
Ref.
3
4
6
7
44
9
Description
Qty.
1
867145 COVER
1
2
301356 SPRING
1
3
867377 O-RING
1
4
867214 FILTER 60 MESH
1
5
867647 SUPPORT
1
6
867077 BASE
1
7
867420 PLUG
1
9
867309 NIPPLE 3/8” NPT x 1/4” NPT 1
10
557391 PLUG 1/4” NPT
1
44‡
FITTING
1
46‡
GAUGE, pressure
1
‡ Not included in Manifold Kit 868014, See page 27.
2
5
Part
10
ti22327a
46
Inlet Valve
Ref.
Stand Model
8
159
160
157
9
10
11
158
12
13
Part
Description
Qty.
8
331011 FLUID PUMP BODY
9
331029 SUCTION BALL GUIDE
10
331030 SUCTION BALL
11
108526 O-RING
12
331292 SUCTION SEAT (HI-BOY)
13
331034 SUCTION NUT
157 ‡
SUCTION SEAT ASSEMBLY (Stand)
158 ‡
O-RING
159 ‡
O-RING
160 ‡
RING, BACKUP
 Included in O-Ring Kit 16W484.
‡ Included in Kit 331051.
ti16056b
22
332882D
1
1
1
1
1
1
1
1
1
1
Parts
Stand Frame Parts Diagram
2
63
53
1
42
ti22328a
Ref. Part
Description
1
2
42
FRAME, CARRY
FASTENER,THREAD,EXTERNAL
RUBBER BOOT
331101
16F551
331048
332882D
Qty.
1
4
2
Ref. Part
53
63
Description
HSE1450 HOSE CPLD 1/4” x 50 ft. (MP400,
Mustang 4800)
245449 HOSE, 1/4” x 25 ft., (MP300)
289316 GUN, 500,2 FINGER,ASM
Qty.
1
1
1
23
Parts
Hi-Boy Parts Diagram
2
3
1
78
77
4
5
7
6
ti17483a
24
Ref.Part
Description
2
3
4
5
6
FRAME
FASTENER,THREAD, EXTERNAL
SPACER
WHEEL,10” X 3.5”
COLLAR, SCREW, SET
331273
16F551
866356
867736
143029
Qty.
1
4
2
2
2
Ref.Part
Description
Qty.
7 331048
RUBBER BOOT
77 HSE1450 HOSE CPLD, 1/4” X 50’
78 289316
GUN, 500, 2 FINGER,ASM
332882D
2
1
1
Parts
Control Parts Diagram
25
30
26
28
31
27
32
78
79
220/230V Models
34
37
120V Models
81
33
29
38
36
35
34
39
28
ti22429a
Ref. Part
25
26
27
28
29
30
31
32
33
34
35
36
37
867243
868000
868013
331342
116969
331185
301083
301150
15V909
868018
868019
Description
GASKET, seal
BOX, terminal, weldment
SEAL, rubber
SCREW, 10-24 X 0.50
NUT, lock
STRAIN RELIEF
SWITCH, toggle
BOOT, rubber, black
SCREW, M8 X12
CONTROL, board, 120V
CONTROL, board, 230V
(220V-240V models)
868007 CONNECTOR, 120V
868008 CONNECTOR, 120V
868009 CONNECTOR, 230V (220V-240V
models)
332882D
Qty.
1
1
1
6
2
2
1
1
2
1
1
Ref. Part
Description
38
39
78
79
81
GASKET, terminal box
COVER, terminal box
GUARD, switch
SCREW, self-drilling, tek
WASHER, lock
868010
868004
112608
139355
17M047
Qty.
1
1
1
1
2
1
1
1
25
Parts
Motor and Drive Parts Diagram
35a
8
9
7
6
5
52
4
3
35e
35b
25
35c
26
35d
66
57
57
4
43
5
12
11
24
10
69
58
56
51
15
21
44
13
33
30
30
22
20
45
44
46
28
16
17
18
Stand Model
41
159
160
157
158
23
19
40
See page 29
ti22329b
26
332882D
Parts
Drive Parts
Ref. Part
Description
3
MOTOR
1HP, 120V (120V models)
0.5 HP, 220V (220V-240V models)
FAN (not shown)
FAN COVER (not shown)
BOLT (not shown)
SCREW, SHOULDER
SCREW, CAP
BEARING,BALL
GEAR,CRANK
.21 ASSY (120V models; MP300)
.26 ASSY (MP400 220V-240V models)
YOKE,CROSSHEAD ASSY
PIN,CROSS PIN 375
SPRING,RET. SPRING
SLEEVE
COVER - GUARD
PUMP,PAINT,ASSY
RETAINER,PUMP
BALL 500
PACKING,O-RING
KIT, PC, MP400, 120V (includes 22)
KIT, PC, MP400, 230V (includes 22)
KIT, PC, MP300, 230V (includes 22)
FITTING, PRESSURE CONTROL
COVER, PRESSURE CONTROL
SCREW,5/16-18 X 3.75 HX HD
SPACER 2.691 LONG
GASKET,SEAL
BOX,TERMINAL BOX WELDMENT
SCREW,MACH,PANHEAD
STRAIN RELIEF
NUT. LOCK (not shown)
SCREW,M8X12
3a
3b
3c
4
5
6
7
331491
331492
331785
331786
866338
107445
331047
331406
331407
9
10
11
12
13
15
16
17
18
20
21
22
23
24
25
26
28
30
31
33
331038
866082
331062
331117
868016
866482
331029
331030
108526
868025
868026
868027
868005
868006
867539
331074
867243
868000
331342
331185
116969
15V909
332882D
Qty. Ref. Part
35 866477
1
1
1
1
1
35a
35b
35c
35d
2 35e
2 43
1 44
1
1
Description
Qty.
COVER,FRONT,ASSEMBLY
(Includes 35a, 35b, 35c)
331046
BEARING
331061
SLEEVE BEARING
331103
WASHER
331197
SCREW
331234
COVER, BARE
POWER CORD (see page 30)
111763
FITTING, HI-BOY
162453
FITTING, STAND
867309
FITTING (model 868057)
867309
FITTING (model 868058)
867660
FITTING, tee, (MP300)
868015
GAUGE, pressure (Models 868057,
868058)
866428
PRESSURE RELIEF VALVE KIT
342524
LABEL- PRIME/SPRAY
15B516 LABEL, warning (120V models;
model 868054)
15H087 LABEL, warning (models 868055,
868056, 868060)
195793 LABEL, warning (120V models;
model 868054)
195792 LABEL, warning (models 868055,
868056, 868060)
16G596  LABEL, warning (models 868057,
868058)
331336
HOOK, pail (HI-BOY models)
C19209 WASHER, lock
113783
SCREW, MACH, PNH
16X134 LABEL, AIRLESSCO, MP400
16X135 LABEL, AIRLESSCO, MP300
16X527 LABEL, ALLPRO, Mustang 4800
1
1
1
2
2
1
1
1
1
2
1
1
45
1 46
1
1 51
1 52
1 54
1
1
1
55
1
1
1
1
1
1 56
2 57
2 58
1
66
1
4
2
2
2  Additional warning labels are available at no cost.
1
1
1
1
1
1
1
1
2
2
1
1
1
27
Parts
Packing Replacement
Ref.
Description
Qty.
331014 MALE GLAND
331016 PACKING POLYETHYLENE
331308 FEMALE ADAPTOR
331011 FLUID PUMP BODY
331029 SUCTION BALL GUIDE
331292 SUCTION SEAT (HI-BOY)
331051 SUCTION SEAT (LO-BOY)
9
331034 SUCTION NUT
10+ 331314 OUTLET SEAT RETAINER
11+ 331026 OUTLET SEAT
12+* 111457 O-RING
13+* 331027 OUTLET BALL
14+
PISTON
15*
331018 SPACER
16*
331025 WASHER, SPRING
17*
331022 MALE GLAND
18*
331023 PACKING POLYETHYLENE
19*
331021 FEMALE GLAND
20
331019 PACKING HOLDER
21
331037 PACKING NUT
22*
331307 PACKING LEATHER
23*
331306 PACKING LEATHER
24*
107313 WHITE O-RING
25*
108771 BLACK O-RING
26
180656 PLUG, BUTTON
157**
SEAT,SUCTION SEAT
158**
PACKING, O-RING
159**
PACKING, O-RING
160**
RING, BACKUP
* 331210 PACKING KIT
+ 331093 PISTON ASSEMBLY
** Included in 331051
2
6
1
1
1
1
1
1
1
1
1
1
1
1
3
1
3
1
1
1
2
4
1
1
1
1
1
1
1
1*
2*
3*
4
5
8
28
Part
1
26
21
2
20
25
23
3
24
2
19
18
18
22
22
1
17
16
16
4
Stand model
15
5
159
6
160
7
157
14
13
11
8
158
9
12
10
ti16115b
332882D
Parts
Gearbox Sleeve Bearing Replacement
1
2
3
Ref.
Part
Description
Qty.
1
2
3
331061 SLEEVE BEARING
331103 WASHER
331197 SCREW
1
2
2
NOTE: When replacing item (1), cover outside of
sleeve with 6 drops of Loctite 246 prior to inserting into
cover assembly.
ti16059a
Suction Assemblies
Stand Chassis
Hi-Boy Chassis (331284)
2
3
1
1
4
4
6
2
5
ti16061a
5
ti22330a
Ref. Part
1
2
4*
5*
6*
Description
331290 SUCTION HOSE ASSEMBLY
187651 INLET STRAINER
HOSE, 1/4 ID X 3/8 OD
244035 DEFLECTOR, BARBED
114287 FITING, BARBED
* Sold in Kit 301349
332882D
Qty.
Ref.
Part
Description
1
1
40”
1
1
1
2
3
4
5
301348
331034
331292
331400
187190
BYPASS HOSE ASSEMBLY
SUCTION NUT
SUCTION SEAT ASSEMBLY
INLET TUBE
INLET STRAINER
Qty.
1
1
1
1
1
29
Parts
Electrical System
120V
Power Plug
On/Off
Switch
Black
White
To Motor
1
Green
(Ground)
Red
Board Kit 868018
7
Pressure Control
ti22336a
230V
Power Plug
3
On/Off
Switch
Brown
Black
1
Red
Blue
To Motor
Green
(Ground)
White
7
Board Kit 868019
ti22337a
Pressure Control
Ref.
1
30
Part
Description
POWER CORD
331163 120V models
867427 Models 868056, 868060
301101 Models 868054, 868055,
868057, 868058
Qty.
1
1
1
Ref. Part
3
301083
7
868025
868026
868027
Description
POWER SWITCH
KIT, PC, MP400, 120V
KIT, PC, MP400, 230V
KIT, PC, MP300, 230V
Qty.
1
1
332882D
Technical Data
Technical Data
MP400/300, Mustang 4800
US
Metric
Sprayer
Power Requirements
120V AC, 60 hz, 10.5A, 1 phase
230V AC, 50/60 hz, 5A, 1 phase (MP400)
230V AC, 50/60 hz, 4A, 1 phase (MP300)
Generator required
3000w minimum
Maximum working pressure
3000 psi
20.7 MPa, 207 bar
120V Models/MP300
741
195
MP400 220V-240V models
599
158
Cycles per gallon (liter)*
Maximum delivery
MP400/ Mustang 4800
0.53 gpm
2.0 lpm
MP300
0.46 gpm
1.75 lpm
Maximum tip size
MP400/ Mustang 4800
0.021
MP300
0.019
Fluid outlet npsm
Wetted parts
1/4 inch
zinc and nickel-plated carbon steel, nylon, stainless steel, PTFE, acetal,
leather, UHMWPE, aluminum, tungsten carbide
Dimensions
Stand
Length
15.5 in.
39.4 cm
Width
10.5 in.
26.7 cm
Height
14.9 in.
37.8 cm
Weight
42.1 lb.
19.1 kg
Length
20.7 in.
52.6 cm
Width
20.0 in.
50.8 cm
Height
33.8 in.
85.8 cm
Weight
57.8 lb
26.2 kg
Hi-Boy
Noise
Sound power
88 dBa
Sound pressure
82 dBa
Notes
* Startup pressures and displacement per cycle may vary based on suction condition, discharge head, air pressure, and fluid
type.
Sound pressure measured at 3.3 feet (1 meter) from equipment.
Sound Power measured per ISO-3744.
Recommend using 50% duty cycle.
332882D
31
Airlessco Standard Warranty
Airlessco warrants all equipment referenced in this document which is manufactured by Airlessco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Airlessco, Airlessco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined
by Airlessco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Airlessco’s
written recommendations.
This warranty does not cover, and Airlessco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Airlessco component parts. Nor shall Airlessco be liable for malfunction, damage or wear caused by the incompatibility of Airlessco
equipment with structures, accessories, equipment or materials not supplied by Airlessco, or the improper design, manufacture, installation,
operation or maintenance of structures, accessories, equipment or materials not supplied by Airlessco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Airlessco distributor for verification
of the claimed defect. If the claimed defect is verified, Airlessco will repair or replace free of charge any defective parts. The equipment will be
returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship,
repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Airlessco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
AIRLESSCO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY Airlessco. These items sold, but not manufactured by Airlessco (such as electric motors, switches, hose, etc.), are subject
to the warranty, if any, of their manufacturer. Airlessco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Airlessco be liable for indirect, incidental, special or consequential damages resulting from Airlessco supplying equipment
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of
warranty, the negligence of Airlessco, or otherwise.
FOR AIRLESSCO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 332882
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2014, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
www.graco.com
Revision D, July 2015

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Key Features

  • Portable application
  • Professional use only
  • 3000 psi maximum working pressure
  • Grounding system
  • Pressure relief procedure
  • Clearance procedures
  • Flush before storage
  • Electric motor maintenance
  • Fluid pump servicing
  • Packing replacement

Frequently Answers and Questions

What are the safety precautions I should take when using the Airless Paint Sprayer MP 400/300 and Airless Paint Sprayer Mustang 4800?
Always read all warnings and instructions in this manual before using the equipment. Be sure to properly ground the equipment and all system components to prevent static sparking and electric shock. Always wear appropriate safety gear, including eye protection, gloves, and a respirator.
How do I prime and flush the Airless Paint Sprayer MP 400/300 and Airless Paint Sprayer Mustang 4800?
To prime, turn the Prime Valve to the open position and turn the pressure control knob clockwise to prime the pump. Once primed, turn the Prime Valve to the closed position. To flush, use a compatible solvent and flush the sprayer after use, especially when spraying water-based materials or materials that could harden in the sprayer overnight.
How do I adjust the pressure on the Airless Paint Sprayer MP 400/300 and Airless Paint Sprayer Mustang 4800?
Turn the Pressure Control Knob clockwise to increase pressure and counterclockwise to decrease pressure. Always use the lowest pressure necessary to completely atomize the material. If more coverage is needed, use a larger tip rather than increasing the pressure.
How do I store the Airless Paint Sprayer MP 400/300 and Airless Paint Sprayer Mustang 4800?
For short-term storage, flush the sprayer with a compatible solvent and fill the pump and hoses with oil-based solvent. For long-term storage, use Graco Pump Armor or mineral spirits and make sure the Prime Valve is left open. Always store the unit indoors.

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