Spraytech 0509027 User Manual

Printed in the U. S. A.

LineCrew 750

Line Striper

Owner’s Manual

Model Number 0509027

SprayTECH

1770 Fernbrook Lane Minneapolis, MN 55447

Technical Assistance: 1-800-292-4637

Order Entry: 1-800-443-4500

Fax: 1-800-525-9501

www.spraytechinc.com

Table of Contents

Safety Precautions.................................................................2

Français ..............................................................................18

Español...............................................................................20

General Description ...............................................................4

Operation ................................................................................4

Setup ....................................................................................4

Preparing to Paint.................................................................5

Painting.................................................................................5

Pressure Relief Procedure ...................................................6

Cleanup ...................................................................................6

Cleaning the Spray Tip.........................................................7

Maintenance............................................................................7

General Repair and Service Notes.......................................7

Maintaining the Engine .........................................................7

Replacing the Pump ON/OFF Switch...................................8

Replacing the Gears and/or Slider Assembly.......................8

Replacing the Electronic Pressure Control (EPC) Board .....9

Replacing the Transducer...................................................10

Servicing the Clutch Assembly...........................................10

Servicing the Fluid Section.................................................13

Replacing the Filter.............................................................14

Replacing the PRIME/SPRAY Valve...................................14

Replacing the Potentiometer ..............................................15

Troubleshooting ...................................................................16

Parts Listings........................................................................22

Main Assembly....................................................................22

Drive Assembly...................................................................23

Cart Assembly.....................................................................24

Fluid Section Assembly ......................................................25

Electrical Schematic ...........................................................25

Filter Assembly ...................................................................26

PRIME/SPRAY Assembly ...................................................26

Wheel Assembly .................................................................26

Suction Hose Assembly......................................................27

Return Hose Assembly.......................................................27

Gun Holder Assembly.........................................................27

Labels .................................................................................27

Limited Warranty..................................................................28

Safety Precautions

This manual contains information that must be read and understood before using the equipment. When you come to an area that has one of the following symbols, pay particular attention and make certain to heed the safeguard.

This symbol indicates a potential hazard that may cause serious injury or loss of life. Important safety information will follow.

This symbol indicates a potential hazard to you or to the equipment. Important information that tells how to prevent damage to the equipment or how to avoid causes of minor injuries will follow.

HAZARD: Injection injury - A high pressure stream

produced by this equipment can pierce the skin and underlying tissues, leading to serious injury and possible amputation. See a physician immediately.

DO NOT TREAT AN INJECTION INJURY AS A SIMPLE CUT! Injection can lead to amputation. See a physician immediately.

The maximum operating range of the sprayer is 3300 PSI /

22.8 MPa fluid pressure.

WARNING

NOTE: Notes give important information which should

be given special attention.

CAUTION

WARNING

PREVENTION:

• NEVER aim the gun at any part of the body.

•NEVER allow any part of the body to touch the fluid stream. DO NOT allow body to touch a leak in the fluid hose.

• NEVER put your hand in front of the gun. Gloves will not provide protection against an injection injury.

•ALWAYS lock the gun trigger, shut the pump off, and release all pressure before servicing, cleaning the tip or guard, changing tip, or leaving unattended. Pressure will not be released by turning off the motor. The PRIME/SPRAY knob must be turned to PRIME to relieve the pressure. Refer to the PRESSURE RELIEF PROCEDURE described in the pump manual.

•ALWAYS keep the tip guard in place while spraying. The tip guard provides some protection but is mainly a warning device.

•ALWAYS remove the spray tip before flushing or cleaning the system.

• The paint hose can develop leaks from wear, kinking and abuse. A leak can inject material into the skin. Inspect the hose before each use.

•NEVER use a spray gun without a trigger lock and trigger guard in place and in good working order.

• All accessories must be rated at or above 3300 PSI / 22.8 MPa. This includes spray tips, guns, extensions, and hose.

HAZARD: EXPLOSION OR FIRE - Solvent and paint fumes

can explode or ignite. Severe injury and/or property damage can occur.

PREVENTION:

• Provide extensive exhaust and fresh air introduction to keep the air within the spray area free from accumulation of flammable vapors.

•Avoid all ignition sources such as static electric sparks, open flames, pilot lights, and hot objects. Connecting or disconnecting power cords or working light switches can make sparks.

•Do not smoke in spray area.

• Fire extinguisher must be present and in good working order.

• Place paint pump in a well ventilated area. Flammable vapors are often heavier than air. Floor area must be extremely well ventilated. The paint pump contains arcing parts that emit spark and can ignite vapors.

• The equipment and objects in and around the spray area must be properly grounded to prevent static sparks.

• Use only conductive or grounded high pressure fluid hose. Gun must be grounded through hose connections.

• Power cord must be connected to a grounded circuit (electric models only).

• Always flush unit into a separate metal container, at low pump pressure, with spray tip removed. Hold gun firmly against side of container to ground container and prevent static sparks.

• Follow the material and solvent manufacturer's warnings and instructions.

• Use extreme caution when using materials with a flashpoint below 70° F (21° C). Flashpoint is the temperature that a fluid can produce enough vapors to ignite.

• Plastic can cause static sparks. Never hang plastic to enclose a spray area. Do not use plastic drop cloths when spraying flammable materials.

• Use lowest possible pressure to flush equipment.

NOTE TO PHYSICIAN: Injection into the skin is a traumatic injury. It is

important to treat the injury as soon as possible. DO NOT delay treatment to research toxicity. Toxicity is a concern with some coatings injected directly into the blood stream. Consultation with a plastic surgeon or reconstructive hand surgeon may be advisable.

GAS ENGINE (WHERE APPLICABLE)

Always place pump outside of structure in fresh air. Keep all solvents away from the engine exhaust. Never fill fuel tank with a running or hot engine. Hot surface can ignite spilled fuel. Always attach ground wire from pump unit to a grounded object, such as a metal water pipe. Refer to engine owner’s manual for complete safety information.

HAZARD: EXPLOSION HAZARD DUE TO INCOMPATIBLE

MATERIALS - Will cause severe injury or property damage.

PREVENTION:

• Do not use materials containing bleach or chlorine.

• Do not use halogenated hydrocarbon solvents such as mildewcide, methylene chloride and 1,1,1 trichloroethane. They are not compatible with aluminum.

• Contact your coating supplier about the compatibility of material with aluminum.

HAZARD: HAZARDOUS VAPORS - Paints, solvents,

insecticides, and other materials can be harmful if inhaled or come in contact with the body. Vapors can cause severe nausea, fainting, or poisoning.

PREVENTION:

• Use a respirator or mask if vapors can be inhaled. Read all instructions supplied with the mask to be sure it will provide the necessary protection.

•Wear protective eyewear.

•Wear protective clothing as required by coating manufacturer.

HAZARD: GENERAL - This product can cause severe

injury or property damage.

PREVENTION:

• Read all instructions and safety precautions before operating equipment.

• Always disconnect the motor from the power supply before working on the equipment (electric models only).

• Follow all appropriate local, state, and national codes governing ventilation, fire prevention, and operation.

• The United States Government Safety Standards have been adopted under the Occupational Safety and Health Act (OSHA). These standards, particularly part 1910 of the General Standards and part 1926 of the Construction Standards should be consulted.

• Use only manufacturer authorized parts. User assumes all risks and liabilities when using parts that do not meet the minimum specifications and safety devices of the pump manufacturer.

• Before each use, check all hoses for cuts, leaks, abrasion or bulging of cover. Check for damage or movement of couplings. Immediately replace the hose if any of these conditions exist. Never repair a paint hose. Replace it with another grounded high-pressure hose.

• All hoses, swivels, guns, and accessories must be rated at or above 3300 PSI / 22.8 MPa.

• Do not spray outdoors on windy days.

•Wear clothing to keep paint off skin and hair.

• Always unplug cord from outlet before working on equipment.

• Do not use this equipment to spray water or acid.

Do not lift by cart handle when loading or unloading.

CAUTION

Gasoline Engine Safety

The engine exhaust from this unit contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

1. Gas engines are designed to give safe and dependable service if operated according to instructions. Read and understand the engine Owner's Manual before operating the engine. Failure to do so could result in personal injury or equipment damage.

2. To prevent fire hazards and to provide adequate ventilation, keep the engine at least 1 meter (3 feet) away from buildings and other equipment during operation. Do not place flammable objects close to the engine.

3. Children and pets must be kept away from the area of operation due to a possibility of burns from hot engine components or injury from any equipment the engine may be used to operate.

4. Know how to stop the engine quickly, and understand the operation of all controls. Never permit anyone to operate the engine without proper instructions.

5. Gasoline is extremely flammable and is explosive under certain conditions.

6. Refuel in a well-ventilated area with the engine stopped. Do not smoke or allow flames or sparks in the refueling area or where gasoline is stored.

7. Do not overfill the fuel tank. After refueling, make sure the tank cap is closed properly and securely.

8. Be careful not to spill fuel when refueling. Fuel vapor or spilled fuel may ignite. If any fuel is spilled, make sure the area is dry before starting the engine.

9. Never run the engine in an enclosed or confined area. Exhaust contains poisonous carbon monoxide gas; exposure may cause loss of consciousness and may lead to death.

10. The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful not to touch the muffler while it is hot. To avoid severe burns or fire hazards, let the engine cool before transporting it or storing it indoors.

11. Never ship/transport unit with gasoline in the tank.

WARNING

General Description

This airless line striper is a precision power tool used to spray many types of material for many types of applications including parking lots, curbs, and athletic fields. Read and follow this instruction manual carefully for proper operating instructions, maintenance, and safety information.

Operation

This equipment produces a fluid stream at extremely high pressure. Read and understand the warnings in the Safety Precautions section at the front of this manual before operating this equipment.

Setup

Perform the following procedure before starting the engine of a gas-powered line striper.

1. Ensure that the suction hose and the return hose are attached and secure.

2. Position the spray gun. a. Loosen the support bar

clamp hex screw and rotate the gun support bar to the desired position. Tighten the hex screw securely.

b. Loosen the gun holder

clamp knob and slide the spray gun to the desired vertical and horizontal (front-to-back) position. Tighten the knob securely.

3. Turn the pressure control knob fully counterclockwise to its lowest pressure setting.

4. Make sure the pump ON/OFF switch is in the OFF position.

5. Fill the fluid section oil cup with approximately one tablespoon of separating oil (P/N 0279920).

Never operate unit for more than ten seconds without fluid. Operating this unit without fluid will cause unnecessary wear to the packings.

7. Check the engine oil level. The gasoline engine oil level is determined by the manufacturer. Refer to the engine manufacturer's service manual (supplied).

CAUTION

NOTE: The height of the spray gun affects the width of

the spray pattern (i.e., the lower the gun, the smaller the line width). Tip size also affects line width.

Cable Block

Gun Holder Clamp Knob

Gun Support

Bar Clamp

Clamp

Hex Screw

Clamp

Hex Screw

WARNING

Gun

Trigger

Gun Holder

Assembly

Airless

Sprayer

Spray Gun

Material

Hose

Return Hose

Suction Hose

Oil Cup

Filter Assembly

PRIME/ SPRAY Val ve

Tip Assembly

Engine

8. Close the fuel shut-off lever and fill the gas tank with gasoline. Use only high quality, unleaded gasoline.

Adjusting the Trigger Tension

Use the following procedure to adjust the spring tension of the trigger lever on the gun holder assembly. The trigger lever pulls and releases the spray gun trigger when operated from the trigger on the cart. The proper tension ensures that the gun will shut off when the gun trigger is released. To ensure proper tension, there should be approximately a 1/32” to 1/16” gap between the trigger lever and the spray gun trigger.

Always keep the trigger lock on the spray gun in the locked position while making adjustments to the system.

1. Using a 5/32” hex wrench, loosen the set screw on the cable block.

2. Move the cable block in the appropriate direction to create a gap of 1/32” to 1/16” between the trigger lever and spray gun trigger.

a. Slide the cable block toward the gun to increase the

gap between the trigger lever and spray gun trigger.

b. Slide the cable block away from the gun to decrease

the gap between the trigger lever and spray gun trigger.

3. Tighten the set screw securely.

Preparing a New Sprayer

If this unit is new, it is shipped with test fluid in the fluid section to prevent corrosion during shipment and storage. This fluid must be thoroughly cleaned out of the system with mineral spirits before you begin spraying.

Always keep the trigger lock on the spray gun in the locked position while preparing the system.

1. Place the suction tube into a container of mineral spirits that has a flash point of 60ºC (140ºF) or above.

2. Place the return hose into a metal waste container.

3. Turn the pressure control knob fully counterclockwise to its lowest pressure setting.

4. Move the PRIME/SPRAY valve to the PRIME position.

5. Move the engine ON/OFF switch to the ON position.

CAUTION

NOTE: The gun support bar and the spray gun can be

mounted on either side of the sprayer. To move the gun support bar:

a. Remove the support bar clamp hex screw and

nut.

b. Move the gun support bar to the opposite

side of the cart.

c. Align the support bar clamp with the bracket

on the cart.

d. Thread the clamp hex screw through the gun

support bar clamp and the bracket on the cart. Place the nut on the end of the clamp hex screw and tighten securely.

Cable Block (set screw on back)

Spray Gun

Trigger

1/32" to 1/16" Gap

Trigger Lever

6. Start the engine: a. Open the fuel valve

lever.

b. Move the throttle

lever away from the gas tank.

c. Close the engine

choke lever.

d. Holding the frame

with one hand, pull the starter rope rapidly and firmly. Continue to hold the rope as you let it return. Pull and return the rope until the engine starts.

7. Turn on the sprayer by moving

the pump ON/OFF switch to the ON position.

8. Slowly turn the pressure control

knob clockwise to increase the pressure until fluid starts to come out of the return hose. Use only enough pressure to keep the fluid coming out.

9. Allow the sprayer to run for

15–30 seconds to flush the test fluid out through the return hose and into the waste container.

10. Turn the pressure control knob fully counterclockwise to its lowest setting.

11.Turn off the sprayer by moving the pump ON/OFF switch to the OFF position.

Preparing to Paint

Before painting, it is important to make sure that the fluid in the system is compatible with the paint that is going to be used.

Always keep the trigger lock on the spray gun in the locked position while preparing the system.

1. Place the suction tube into a container of the appropriate solvent for the material being sprayed (refer to recommendations of the material manufacturer). An example of the appropriate solvent is water for latex paint.

2. Place the return hose into a metal waste container.

3. Turn the pressure control knob fully counterclockwise to its lowest pressure setting.

4. Move the PRIME/SPRAY valve to the PRIME position.

5. Move the engine ON/OFF switch to the ON position.

6. Start the engine:

a. Open the fuel valve lever. b. Move the throttle lever away from the gas tank. c. Close the engine choke lever. d. Holding the frame with one hand, pull the starter rope

rapidly and firmly. Continue to hold the rope as you let it return. Pull and return the rope until the engine starts.

7. Turn on the sprayer by moving the pump ON/OFF switch to the ON position.

8. Slowly turn the pressure control knob clockwise to increase the pressure until fluid starts to come out of the return hose. Use only enough pressure to keep the fluid coming out.

9. Allow the sprayer to run for 15–30 seconds to flush the old solvent out through the return hose and into the metal waste container.

10. Turn the pressure control knob fully counterclockwise to its lowest setting.

11.Turn off the sprayer by moving the pump ON/OFF switch to the OFF position.

CAUTION

NOTE: Incompatible fluids and paint may cause the

valves to become stuck closed, which would require disassembly and cleaning of the sprayer’s fluid section.

Pressure

Control

Knob

Pump ON/OFF Switch

Fuel Valve

Lever

Choke Lever

Engine ON/OFF Switch

Throttle Lever

Starter Rope

12. Move the PRIME/SPRAY valve to the SPRAY position.

13. Turn on the sprayer.

14. Turn the pressure control knob slowly clockwise to increase pressure.

15. Unlock the gun by turning the gun trigger lock to the unlocked position.

Ground the gun by holding it against the edge of the metal container while flushing. Failure to do so may lead to a static electric discharge, which may cause a fire.

16. Trigger the gun into the metal waste container until the old solvent is gone and fresh solvent is coming out of the gun.

17. Lock the gun by turning the gun trigger lock to the locked position.

18. Set down the gun and increase the pressure by turning the pressure control knob slowly clockwise to its highest setting.

19. Check the entire system for leaks. If leaks occur, turn the sprayer off and follow the “Pressure Relief Procedure” in this manual before tightening any fittings or hoses.

20. Follow the “Pressure Relief Procedure” in this manual before changing from solvent to paint.

Be sure to follow the pressure relief procedure when shutting the unit down for any purpose, including servicing or adjusting any part of the spray system, changing or cleaning spray tips, or preparing for cleanup.

Painting

1. Place the suction tube into a container of paint.

2. Place the return hose into a metal waste container.

3. Turn the pressure control knob fully counterclockwise to its lowest pressure setting.

4. Move the PRIME/SPRAY valve to the PRIME position.

5. Move the engine ON/OFF switch to the ON position.

6. Start the engine:

a. Open the fuel valve lever. b. Move the throttle lever away from the gas tank.

c. Close the engine

choke lever.

d. Holding the frame

with one hand, pull the starter rope rapidly and firmly. Continue to hold the rope as you let it return. Pull and return the rope until the engine starts.

7. Turn on the sprayer by moving the pump ON/OFF switch to the ON position.

8. Slowly turn the pressure control knob clockwise to increase the pressure until fluid starts to come out of the return hose. Use only enough pressure to keep the fluid coming out.

9. Allow the sprayer to run until paint is coming through the return hose into the metal waste container.

10. Turn the pressure control knob fully counterclockwise to its lowest setting.

11.Turn off the sprayer by moving the pump ON/OFF switch to the OFF position.

Pressure

Control

Knob

Pump ON/OFF Switch

Fuel Valve

Lever

Choke Lever

Engine ON/OFF Switch

Throttle Lever

Starter Rope

WARNING

NOTE: Make sure that the spray gun does not have a

tip or tip guard installed.

12. Remove the return hose from the waste container and place it in its operating position above the container of paint.

13. Move the PRIME/SPRAY valve to the SPRAY position.

14. Turn on the sprayer.

15. Turn the pressure control knob slowly clockwise to increase pressure.

16. Unlock the gun by turning the gun trigger lock to the unlocked position.

Ground the gun by holding it against the edge of the metal container while flushing. Failure to do so may lead to a static electric discharge, which may cause a fire.

17. Trigger the gun into the metal waste container until all air and solvent is flushed from the spray hose and paint is flowing freely from the gun.

18. Lock the gun by turning the gun trigger lock to the locked position.

19. Turn the pressure control knob fully counterclockwise to its lowest setting.

20. Turn off the sprayer.

21. Attach tip guard and tip to the gun as instructed by the tip guard or tip manuals.

POSSIBLE INJECTION HAZARD. Do not spray without the tip guard in place. Never trigger the gun unless the tip is in either the spray or the unclog position. Always engage the gun trigger lock before removing, replacing or cleaning tip.

22. Turn on the sprayer.

23. Increase the pressure by turning the pressure control knob slowly clockwise. Test the spray pattern and line position on a long piece of roofing felt or cardboard.

a. Adjust the pressure control knob until the spray from

the gun is completely atomized. Try to keep the pressure control knob at the lowest setting that maintains good atomization.

b. Check for proper line width and position. If adjustment

to the position of the spray gun is required, refer to the “Setup” procedure earlier in this section.

24. Make sure that the spray gun completely shuts off when the gun trigger is released. If adjustment to the trigger tension is required, refer to the “Adjusting the Trigger Tension” procedure earlier in this section.

Pressure Relief Procedure

1. Lock the gun by turning the gun trigger lock to the locked position.

2. Turn off the sprayer by moving the pump ON/OFF switch to the OFF position.

3. Turn off the engine by moving the engine ON/OFF switch to the OFF position.

4. Turn the pressure control knob counterclockwise to its lowest setting.

5. Unlock the gun by turning the gun trigger lock to the unlocked position.

WARNING

NOTE: Turning the pressure up higher than needed to

atomize the paint will cause premature tip wear and additional overspray.

WARNING

4. Hold the metal part of the gun firmly to the side of a metal container to ground the gun and avoid a build up of static electricity.

5. Trigger the gun to remove any pressure that may still be in the hose.

6. Lock the gun by turning the gun trigger lock to the locked position.

7. Move the PRIME/SPRAY valve to the PRIME position.

Cleanup

Special cleanup instructions for use with flammable solvents:

•Always flush spray gun preferably outside and at least one hose length from spray pump.

• If collecting flushed solvents in a one gallon metal container, place it into an empty five gallon container, then flush solvents.

• Area must be free of flammable vapors.

• Follow all cleanup instructions.

The sprayer, hose, and gun should be cleaned thoroughly after daily use. Failure to do so permits material to build up, seriously affecting the performance of the unit.

Always spray at minimum pressure with the gun nozzle tip removed when using mineral spirits or any other solvent to clean the sprayer, hose, or gun. Static electricity buildup may result in a fire or explosion in the presence of flammable vapors.

1. Follow the “Pressure Relief Procedure” found in the Operation section of this manual.

2. Remove the gun tip and tip guard and clean with a brush using the appropriate solvent.

3. Place the suction tube into a container of the appropriate solvent (refer to recommendations of the material manufacturer). An example of the appropriate solvent is water for latex paint.

4. Place the return hose into a metal waste container.

5. Move the PRIME/SPRAY valve to its PRIME position.

6. Move the engine ON/OFF switch to the ON position and start the engine.

7. Turn on the sprayer by moving the pump ON/OFF switch to the ON position.

8. Slowly turn the pressure control knob clockwise to increase the pressure until fluid starts to come out of the return hose.

9. Allow the solvent to circulate through the sprayer and flush the paint out of the return hose into the metal waste container.

10. Turn the pressure control knob fully counterclockwise to its lowest setting.

11.Turn off the sprayer by moving the ON/OFF switch to the OFF position.

12. Move the PRIME/SPRAY valve to its SPRAY position.

13. Turn on the sprayer.

14. Turn the pressure control knob slowly clockwise to increase pressure.

Pressure

Control

Knob

Pump ON/OFF Switch

WARNING

CAUTION

WARNING

Ground the gun by holding it against the edge of the metal container while flushing. Failure to do so may lead to a static electric discharge, which may cause a fire.

15. Trigger the gun into the metal waste container until the paint is flushed out of the hose and solvent is coming out of the gun.

16. Continue to trigger the spray gun into the waste container until the solvent coming out of the gun is clean.

17. Follow the “Pressure Relief Procedure” found in the Operation section of this manual.

18. Store the sprayer in a clean, dry area.

Do not store the sprayer under pressure.

Cleaning the Spray Tip

1. Flush the gun with solvent immediately after the work is completed.

2. Oil the sliding pins to prevent them from seizing up.

Should the spray tip become clogged, reverse the spray tip with the lever and pull the trigger. Once the obstruction comes out of the spray tip, release the trigger, reverse the spray tip back to the spray pattern setting, and resume spraying.

Do not attempt to clean the tip with your finger. Do not use a needle or other sharp pointed instrument to

clean the tip. The hard tungsten carbide is brittle and can be chipped.

Maintenance

Before proceeding, follow the Pressure Relief Procedure outlined previously in this manual. Additionally, follow all other warnings to reduce the risk of an injection injury, injury from moving parts, or electric shock.

General Repair and Service Notes

The following tools are needed when repairing this sprayer:

Phillips screwdriver 3/8" hex wrench needle-nose pliers 5/16" hex wrench adjustable wrench 1/4" hex wrench rubber mallet 3/16" hex wrench flat-blade screwdriver 1/8” hex wrench 1/2” open-end wrench 7/8” open-end wrench

1. Before repairing any part of the sprayer, read the instructions carefully, including all warnings.

Never pull on a wire to disconnect it. Pulling on a wire could loosen the connector from the wire.

CAUTION

NOTE: All Honda engine work should be performed by

a Honda authorized service center.

WARNING

CAUTION

NOTE: For long-term or cold weather storage, pump

mineral sprits through the entire system.

WARNING

2. Test your repair before regular operation of the sprayer to be sure that the problem is corrected. If the sprayer does not operate properly, review the repair procedure to determine if everything was done correctly. Refer to the Troubleshooting section to help identify other possible problems.

3. Make certain that the service area is well ventilated in case solvents are used during cleaning. Always wear protective eyewear while servicing. Additional protective equipment may be required depending on the type of cleaning solvent. Always contact the supplier of solvents for recommendations.

4. If you have any further questions concerning your SprayTECH airless sprayer, call SprayTECH:

Technical Service...................................1-800-292-4637

Fax ................................................1-800-525-9501

Maintaining the Engine

When transporting a sprayer with a gas engine, make sure the fuel is shut off.

Important Facts Concerning this Sprayer

This gas-powered sprayer contains a clutch that engages when the sprayer is pumping. The sprayer’s pressure control system engages and disengages the clutch to control pressure. To prevent unnecessary wear to the clutch, it is advisable to adjust the engine speed and pressure setting to limit the amount of times the clutch engages and disengages. To reduce clutch wear, refer to the following examples.

Example:

Operating one gun with a .019 tip — reduce the engine speed by adjusting the throttle to a low or medium setting and increase pressure only until the heavy ends of the spray pattern have been eliminated.

Example:

Operating one gun with .023 tip — increase engine speed to a high setting and increase pressure until the heavy ends of the spray pattern have been eliminated.

Example:

Spraying light-bodied materials at low pressure — to reduce surging at the gun and to decrease clutch wear, reduce the engine speed to idle and reduce pressure until the desired spray pattern is achieved.

Routine Engine Maintenance

Daily

• Check and fill the gas tank.

• After the first 20 hours of operation, drain the oil and refill with clean oil. Check the engine oil level and fill as necessary.

Weekly

• Remove the cover of the air filter and clean the element. Replace the element if necessary. If operating in an unusually dusty environment, check the filter daily and replace if necessary. (Replacement elements can be purchased from your local SprayTECH dealer.)

• After each 50 hours of operation: Change the engine oil.

Spark Plug

• Use only a (NKG) BP6ES plug.

• Gap the plug 0.025” – 0.030” (0.7 – 0.8 mm).

• Make sure to use a spark plug wrench when installing and removing the plug.

NOTE: For detailed engine specifications and

maintenance, refer to the separate engine manual supplied with this sprayer.

WARNING

Replacing the Pump ON/OFF Switch

Electrostatic discharge (ESD) potential could cause damage to electronic pressure control. Use SprayTECH ESD wrist strap P/N 0507958 or equivalent when working on electronic pressure control.

1. Perform the Pressure Relief Procedure.

2. Using a Phillips screwdriver, remove the four screws that secure the electronic pressure control (EPC) assembly to the EPC housing. Carefully remove the EPC assembly from the housing. Gently move the assembly away from the sprayer and allow the assembly to hang from the housing.

3. Locate the bottom of the pump ON/OFF switch inside the EPC housing.

4. Disconnect the switch wires from the pump ON/OFF switch. Remember the locations of each of the two wires (label the wires, if necessary).

5. Depress the mounting tabs on each corner of the pump ON/OFF switch inside the EPC housing and remove the switch through the top of the housing.

6. Snap the new pump ON/OFF switch into the switch hole in the EPC housing.

7. Connect the two switch wires to the new pump ON/OFF switch. Make sure the wires are connected to the corresponding terminals from which they were removed (refer to the labels created earlier in this procedure or the electrical schematic in the Parts List section of this manual).

8. Carefully place the EPC assembly over the EPC housing taking care not to pinch any wires.

9. Install the four screws that secure the EPC assembly to the EPC housing. Tighten securely.

WARNING

Replacing the Gears and/or Slider Assembly

1. Using a Phillips screwdriver, remove the four front cover screws. Remove the front cover.

2. Start the engine (refer to the procedures in the Operation section of this manual). Turn the pressure control knob clockwise to its maximum pressure setting.

3. Toggle the pump ON/OFF switch between the ON and OFF positions in short bursts until the slider assembly and piston stop at the bottom of their stroke (in their lowest position).

4. Turn off the engine and perform the Pressure Relief Procedure.

5. Using a 11/16” openend wrench, loosen and remove the fluid hose from the fitting on the back of the fluid section.

6. Using a 3/8” hex wrench, remove the two socket screws that secure the fluid section to the pump housing.

7. Remove the fluid section by pulling it straight down from the pump housing until the dowel pins on the pump housing disengage from the fluid section housing. Then, pull the fluid section forward to disengage the piston from the T-slot on the slider assembly.

8. Using a 1/4” hex wrench,.remove the four socket screws that secure the pump housing to the gear housing.

9. Slide the pump housing away from the gear housing.

10. Remove and clean the housing gasket. Replace if damaged.

11. Slide the crankshaft assembly, with the two thrust washers out from the gear housing side of the pump housing.

12. Remove the output gear assembly with the two thrust washers.

13. Thoroughly clean the crankshaft assembly, the output gear assembly, and all the thrust washers.

Fitting

Piston

Pump

Housing

Slider

Assembly

Front Cover Screw

Fluid Section Housing

Socket Screw

Front Cover

NOTE: If replacing the slider assembly, the fluid

section must be removed from the pump housing.

EPC

Assembly

Screw

EPC

Assembly

EPC

Board

Pump ON/OFF Switch

Gear Housing

Cylindrical Thrust Washer

Crankshaft Assembly

Large Thrust Washer

Pump Housing

Connecting

Rod

Thrust Washer

Housing Gasket

Slider Bushing

Pump Housing Socket Screw

Slider Assembly

Thrust Washer

Output Gear Assembly

14. Inspect all parts for excessive wear and replace if damaged or worn. If the crankshaft or output gear assembly are replaced, replace the corresponding thrust washers as well.

15. Inspect the pinion gear on the end of the drive shaft for wear. Replace if damaged or worn (refer to the “Servicing the Clutch Assembly” procedure in this section).

16. Slide the slider assembly up and out of the slider bushing in the front of the pump housing.

17. Check the parts for wear.

a. If the slider bushing is scored or out of round it should

be replaced.

b. If the slider assembly is scored or the connection

between the connecting rod and slider assembly exhibits movement other than pivoting movement, the slider assembly should be replaced. The slider assembly also should be replaced if the connecting rod bearing shows signs of wear.

c. Any parts that will be reused should be cleaned

thoroughly, including the connecting rod. Also, clean the crankshaft pin that the connecting rod bearing rides on.

d. If the slider bushing requires replacement, a press must

be used. Position the pump housing so that the bushing is facing the arbor on the press. Position the new bushing on top of the old bushing. Lower the arbor on the press to contact the new bushing and press the new bushing into the bore. As the new bushing is pressed into the bore, the old bushing is pressed out of the bore. The new bushing is in place when it is flush with the bore wall on the pump housing.

18. Coat the output gear assembly and each side of its thrust washers with fresh Lubriplate GR-132 grease. Place the thrust washers on their proper shaft of the output gear assembly.

19. Lubricate the output gear assembly with fresh Lubriplate GR-132 grease. Insert the gear assembly into its bore in the gear housing, gear end first. The teeth on the gear will mate with the teeth on the drive shaft pinion.

20. Generously coat all surfaces of the cylindrical crankshaft assembly thrust washer with fresh Lubriplate GR-132 grease.

21. Slip the flat end of the cylindrical thrust washer behind the gear on the output gear assembly, lining its bore up with the gear housing bearing bore for the crankshaft assembly.

22. Lubricate the crankshaft assembly gear with fresh Lubriplate GR-132 grease. Slide the gear side shaft of the crankshaft through the cylindrical thrust washer and into its bore within the gear housing.

23. Position the pin on the end of the crankshaft towards the bottom of the gear housing (the bottom dead center position).

24. Lubricate both faces of the large crankshaft assembly thrust washer with fresh Lubriplate GR-132 grease. Place the thrust washer onto the crankshaft against the gear.

25. Place the housing gasket over the gear housing dowel pins.

26. Lubricate the outside of the slider assembly and the inside of the slider bushing with oil. Fill the slider cup with Lubriplate 1242 grease (the slider cup is the area on the slider assembly where the connecting rod and slider join and pivot).

27. Insert the slider assembly into the slider bushing so that the small dimple on the face of the connecting rod faces the open side of the pump housing.

28. Carefully place the pump housing assembly in front of the gear housing assembly, lining up the gear housing dowel pins with their corresponding holes in the pump housing. Slide the pump housing onto the gear housing until there is no gap between the housings and gasket.

NOTE: If any of the gears are worn and require

replacement, check the grease in the gear housing for metal particles or shavings. Remove the contaminated grease. Replace the grease that has been removed with fresh Lubriplate GR-132 grease.

Do not force the pump housing and gear housing together.

29. Locate the four socket screws and lock washers that secure the pump housing to the gear housing. The longer screws (2.25”) are fastened into the top internal holes. The shorter screws (2”) are fastened into the bottom external bosses.

30. Using a 1/4” hex wrench, snug and tighten the socket screws in a crossing pattern. Torque to 200–230 in./lbs.

31. If the fluid section was removed, reinstall by engaging the notch in the top of the piston with the groove in the bottom of the slider assembly. Push the fluid section up toward the pump housing until the dowel pins in the pump housing engage the holes in the fluid section housing.

32. Insert the two socket screws that secure the fluid section to the pump housing and alternately snug, tighten, and torque the screws to 400-440 in./lbs.

33. Position the front cover over the pump housing. Secure the front cover using the four front cover screws.

34. Using a 11/16” open-end wrench, attach the fluid hose to the fitting on the back of the fluid section. Tighten securely.

Replacing the Electronic Pressure Control (EPC) Assembly

Electrostatic discharge (ESD) potential could cause damage to electronic pressure control. Use SprayTECH ESD wrist strap P/N 0507958 or equivalent when working on electronic pressure control.

1. Perform the Pressure Relief Procedure.

3. Remember the locations of all the wire connections on the EPC board (refer the electrical schematic located in the Parts List section of this manual). If necessary, label all the connections so that they can be replaced in their exact location when the assembly is replaced.

4. Disconnect all the wires from the EPC board.

5. Connect all the wires to the new EPC assembly board (refer to the labels created earlier in this procedure or the electrical schematic in the Parts List section of this manual).

6. Carefully place the EPC assembly over the EPC housing taking care not to pinch any wires.

7. Install the four screws that secure the EPC assembly to the EPC housing. Tighten securely.

8. Take the sprayer to a SprayTECH Authorized Service Center for re-calibration.

EPC Housing

EPC Assembly Screw

EPC Assembly

EPC

Board

WARNING

CAUTION

NOTE: While sliding the pump housing into place, the

crankshaft pin will begin to protrude from the bearing in the center of the pump housing. Position the slider assembly so that as the crankshaft pin protrudes from the main bearing, it engages the connecting rod bearing.

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