Graco 307616Y GH 733 Hydra-Spray Sprayer Owner's Manual

INSTRUCTIONS-PARTS LIST

This manual contains important warnings and information.

READ AND KEEP FOR REFERENCE.

First choice when quality counts.

t

INSTRUCTIONS

Parts

GH 733 HYDRA–SPRAY

r

SPRAYER

3500 psi (240 bar, 24 MPa) MAXIMUM WORKING PRESSURE

U.S. Patent Pending

Model 231733, Series D

Sprayer only. Has Severe-Duty* Displacement Pump

Model 230975

Includes Sprayer 231733, Hose, Swivel, Gun,

RAC r IV, DripLess t Tip Guard and SwitchTip t

*Severe-duty displacement pumps have an abrasion and corrosion-resistant displacement rod and sleeve. Refer to the Technical Data in manual 307862.

307616

Rev. Y

GRACO INC.

P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441

E

COPYRIGHT 1983, GRACO INC.

Graco Inc. is registered to I.S. EN ISO 9001

9089B

Table of Contents

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Component Identification . . . . . . . . . . . . . . . . . . . . . . . .

2

5

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation

5

8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displacement Pump Service . . . . . . . . . . . . . . . . . . . .

12

13

16

Complete Sprayer Parts Drawing

GH733 Sprayer Parts Drawing

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

17

18

GH733 Sprayer Parts List

Accessories

. . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

23

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco Phone Number . . . . . . . . . . . . . . . . . . . . . . . . . .

23

23

Graco Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Symbols

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to equipment if you do not follow the instructions.

WARNING

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.

D This equipment is for professional use only.

D Read all instruction manuals, tags, and labels before operating the equipment.

D

Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.

D

Do not alter or modify this equipment. Use only genuine Graco parts.

D Check equipment daily. Repair or replace worn or damaged parts immediately.

D

Do not exceed the maximum working pressure of the lowest rated system component. Refer to the

Technical Data on page 23 for the maximum working pressure of this equipment.

D

Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Technical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.

D

Do not use hoses to pull equipment.

D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose

Graco hoses to temperatures above 82 _ C (180 _ F) or below –40 _ C (–40 _ F).

D

Do not lift pressurized equipment.

D

Comply with all applicable local, state, and national fire, electrical, and safety regulations.

D Wear hearing protection when operating this equipment.

D

Do not use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids containing such solvents in pressurized aluminum equipment. Such use could result in a chemical reaction, with the possibility of explosion.

2

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WARNING

INJECTION HAZARD

Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury.

D Fluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate medical attention.

D

Do not point the gun at anyone or at any part of the body.

D Do not put your hand or fingers over the spray tip.

D Do not stop or deflect leaks with your hand, body, glove or rag.

D

Do not “blow back” fluid; this is not an air spray system.

D

Always have the tip guard and the trigger guard on the gun when spraying.

D

Check the gun diffuser operation weekly. Refer to the gun manual.

D

Be sure the gun trigger safety operates before spraying.

D

Lock the gun trigger safety when you stop spraying.

D Follow the Pressure Relief Procedure on page 10 if the spray tip clogs and before cleaning, checking or servicing the equipment.

D Tighten all fluid connections before operating the equipment.

D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do not repair high pressure couplings; you must replace the entire hose.

D Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by kinks or bends near the couplings.

TOXIC FLUID HAZARD

Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin, inhaled, or swallowed.

D Know the specific hazards of the fluid you are using.

D

Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local, state and national guidelines.

D

Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and solvent manufacturer.

FUEL HAZARD

The fuel used in this unit is combustible and when spilled on a hot surface can ignite and cause a fire.

D

Do not fill the fuel tank while the engine is running or hot.

EXHAUST HAZARD

The exhaust contains poisonous carbon dioxide which is colorless and odorless.

D Do not operate this equipment in a closed building.

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3

WARNING

FIRE AND EXPLOSION HAZARD

Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and result in a fire or explosion and serious injury.

D If there is any static sparking or you feel an electric shock while using this equipment, stop spraying immediately.

Do not use the equipment until you identify and correct the problem.

D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid being sprayed.

D Keep the spray area free of debris, including solvent, rags, and gasoline.

D Disconnect all electrical equipment in the spray area.

D

Extinguish all open flames or pilot lights in the spray area.

D

Do not smoke in the spray area.

D

Do not turn on or off any light switch in the spray area while operating or if fumes are present.

D

Do not operate a gasoline engine in the spray area.

D

Ground the sprayer to a true earth ground with the ground wire and clamp (supplied).

D Use only electrically conductive hoses.

MOVING PARTS HAZARD

Moving parts can pinch or amputate your fingers.

D

Keep clear of all moving parts when starting or operating the sprayer.

D Before servicing the equipment, follow the Pressure Relief Procedure on page 10 to prevent the equipment from starting unexpectedly.

NOTE: This is an example of the DANGER label on your sprayer. This label is available in other languages, free of charge. See page 23 to order.

FIRE AND

EXPLOSION HAZARD

SKIN INJECTION

HAZARD

Spray painting, flushing or cleaning equipment with flammable liquids in confined areas can result in fire or explosion.

Use outdoors or in extremely well ventilated areas. Ground equipment, hoses, containers and objects being sprayed.

Avoid all ignition sources such as static electricity from plastic drop cloths, open flames such as pilot lights, hot objects such as cigarettes, arcs from connecting or disconnecting power cords or turning light switches on and off.

Failure to follow this warning can result in death or serious injury.

Liquids can be injected into the body by high pressure airless spray or leaks – especially hose leaks.

Keep body clear of the nozzle. Never stop leaks with any part of the body. Drain all pressure before removing parts.Avoid accidental triggering of gun by always setting safety latch when not spraying.

Never spray without a tip guard.

In case of accidental skin injection, seek immediate

“Surgical Treatment”.

Failure to follow this warning can result in amputation or serious injury.

READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE

4

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Component Identification

HYDRAULIC RETURN LINE TO MOTOR

MOTOR RESET BUTTON

HYDRAULIC MOTOR

HYDRAULIC SUPPLY LINE TO MOTOR

GASOLINE

FILL CAP

HYDRAULIC

RESERVOIR

SUCTION TUBE

HYDRAULIC

PUMP

CHECK

VALVE

PRESSURE

DRAIN VALVE

DISPLACEMENT PUMP

9089B

PRESSURE

CONTROL KNOB

SUCTION HOSE

Fig 1

Model 231733 Shown

Setup

1.

Connect the Hose and Gun a.

Remove the plastic cap plug from the outlet tee and screw an accessory, conductive or grounded spray hose onto the 1/4 npsm(f) outlet nipple. See Fig 1.

b.

Connect a small diameter, 3 ft (0.9 m) whip hose between the main hose and a spray gun, if desired, for more flexible gun movement.

See Fig 1.

c.

Don’t use thread sealant on the swiveling nut of the hose couplings, and don’t install the spray tip yet.

NOTE: Use thread sealant on all male threads except at swivel unions. Swivel unions are made to self– seal, and using thread sealant prevents the swivel from turning freely.

2.

Fill the Packing Nut/Wet Cup 1/3 full with Graco

Throat Seal Liquid (TSL), supplied. See Fig. 2.

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5

3.

Check the Hydraulic Oil Level a.

Unscrew the hydraulic oil fill cap. See Fig 2.

The dipstick is attached to the cap. The oil should be up to the full line on the dipstick.

Setup

CAUTION

To prevent damage to the cooling system and hydraulic pump, use only Graco Hydraulic Oil,

169236 (5 gal./20 liter) or 207428 (1 gal/3.8 liter).

Other types of hydraulic oil may damage the hydraulic components.

FUEL

SHUTOFF

VALVE

ENGINE OIL

FILL PLUG b.

Add oil as needed to the proper level. A completely full hydraulic system contains about 5 gallons (20 liters) of oil.

PACKING

NUT/ WET

CUP

Fig 2

OIL DIPSTICK

GASOLINE

FILL CAP

HYDRAULIC OIL

FILL CAP

7871b

Fig 3 7872A

4.

Check the Engine Oil Level a.

Remove the dipstick. See Fig 3.

b.

Check to be sure the oil is up to the full mark on the dipstick.

c.

If oil is needed, see the chart below for the recommended oil type and weight.

d.

Crank case capacity: 1.5 quarts (1.4 liters)

RECOMMENDED LUBRICATION OIL: Use a high quality detergent oil of American Petroleum Institute

(API) service class SG or SH for regular use and for breaking in a new engine.

GRADE OF OIL CHART

SEASON OR TEMPERATURE

Spring, Summer, Autumn

30 _ F to 0 _ , Winter

GRADE OF OIL

SAE 10W–30

SAE 5W–20 or 10W–20

6

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5.

Fill the Fuel Tank

WARNING

FIRE AND EXPLOSION HAZARD

Fuel spilled on a hot surface can cause a fire or explosion and serious bodily injury and property damage. Shut off engine and let it cool before filling the tank. Carefully follow steps 5.a. to 5.c., below, being sure not to spill any fuel.

a.

Close the fuel shutoff valve. See Fig 3.

b.

Use only clean, fresh, well-known brands of unleaded regular grade gasoline . The minimum octane requirements are 87 octane in the U.S.A. and 96 octane elsewhere.

c.

Remove the gasoline fill cap and fill the tank.

Be sure the air vent in the fill cap is not plugged so gasoline can flow to the carburetor, then replace the cap. See Fig 3.

d.

Fuel tank capacity: 1.7 gallons (6.5 liters) e.

Gasoline consumption at the maximum operating speed of 2900 RPM is about 1.3 gallons/ hour (4.9 liters/hour).

Setup

6.

Grounding

WARNING

FIRE AND EXPLOSION HAZARD

To reduce the risk of static sparking, fire or explosion which can result in serious bodily injury and property damage, ground the sprayer, all system components, and the object being sprayed as instructed under FIRE

OR EXPLOSION HAZARD on page 3.

Connect the ground wire and clamp (provided) to a true earth ground. See Fig 4.

CLAMP

Fig 4 7873B

7.

Flush the sprayer to remove the oil which was left in the pump after factory testing to protect the pump from corrosion. See Flushing .

8.

Battery Maintenance

Always charge a new battery or a battery that has not been in use for a long period.

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7

Flushing

When to Flush

1.

New sprayer.

Your new sprayer was factory tested with lightweight oil which was left in to protect pump parts from corrosion.

Before using oil–base paint, flush with mineral spirits only.

Before using water–base paint, flush with mineral spirits, followed by soapy water, then a clean water rinse.

2.

Changing colors.

Flush with a compatible solvent such as mineral spirits.

3.

Changing from water–base to oil–base paint.

Flush with soapy water, then mineral spirits.

4.

Changing from oil–base to water–base paint.

Flush with mineral spirits, followed by soapy water, then a clean water flush.

5.

Storage.

Water–base paint: flush with water, then mineral spirits and leave the pump, hose and gun filled with mineral spirits. Follow the Pressure Relief

Procedure Warning, page 10.

Oil–base paint: flush with mineral spirits. Follow the Pressure Relief Procedure Warning , page

10.

6.

Startup after storage.

Before using water–base paint, flush out mineral spirits with soapy water and then clean water.

When using oil–base paint, flush out mineral spirits with fluid to be sprayed.

8.

Turn and hold the ignition key to START until you hear the engine “catch”, then release the key to RUN.

See Fig 5. If the engine does not start, open the choke a little (push in on head). If the engine floods, open the choke all the way and try again.

AIR FILTER

How to Flush

WARNING

INJECTION HAZARD

Follow the Pressure Relief Procedure

Warning on page 10. Remove the spray tip before flushing.

1.

Engage the gun safety latch. Remove the spray tip from the gun.

2.

Pour enough clean, compatible solvent to fill the pump and hoses into a large, grounded metal pail.

3.

Place the suction tube into the pail or tilt the sprayer back (it will support itself) and place the pail under the pump. Then tilt the sprayer forward to lower the pump into the pail.

4.

Turn the pressure control knob counterclockwise until all spring tension is relieved. You will be able to feel it. The sprayer is now set at the lowest pressure setting. Turning the knob further will remove it. Tighten the knob locknut to set. See Fig

5.

5.

Open the bypass valve. The valve lever will be parallel to the body of the valve. See Fig 5.

6.

Open the fuel shutoff valve by turning it to horizontal. See Fig 5.

7.

Close the choke by pulling out on the choke head.

See Fig 5.

CAUTION

The bypass valve must be opened when starting the sprayer to prevent damaging the starter.

FUEL

SHUTOFF

VALVE

PRESSURE

CONTROL

KNOB

CHOKE

BYPASS

VALVE

Fig 5

ON/OFF

SWITCH

7874A

9.

After the engine is warm, gradually open the choke lever (push choke head in completely) and close the bypass valve. See Fig 5.

10. Point the gun into the grounded metal pail and hold a metal part of the gun firmly against the pail.

NOTE: To save the fluid in the pump and hose, trigger the gun into the paint container or a separate clean container. At the same time, slowly turn the pressure control knob clockwise just enough to start the pump. When solvent appears, release the trigger and continue as below.

8

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Flushing

WARNING

FIRE AND EXPLOSION HAZARD

To reduce the risk of static sparking and splashing when flushing, always remove the spray tip from the gun and hold a metal part of the gun firmly to the side of a grounded metal pail.

11. Making firm metal-to-metal contact, hold the gun firmly to the side of the grounded solvent pail.

Trigger the gun. At the same time, slowly turn the pressure control knob clockwise just enough to start the pump.

12. Circulate the solvent until the system is thoroughly flushed.

13. Release the trigger and engage the gun safety latch.

14.

If you are going to start spraying, place the pump or suction tube into the supply container.

Follow the Pressure Relief Procedure on page

10. Engage the gun safety latch until you are ready to prime the pump. See Step 3, page 9.

15.

If you are going to store the sprayer, be sure your final flush is with an oil–based solvent, such as mineral spirits. Remove the suction tube or pump from the solvent pail. Follow the Pressure

Relief Procedure on page 10. Engage the gun safety latch, but leave the drain valve open.

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9

Operation

Pressure Relief Procedure

WARNING

INJECTION HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. Fluid under high pressure can be injected through the skin and cause serious injury. To reduce the risk of an injury from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you:

D are instructed to relieve the pressure,

D stop spraying,

D check or service any of the system equipment,

D install or clean the spray tip.

1.

Engage the gun safety latch.

2.

Open the bypass valve.

2.

Starting the Sprayer a.

Open the bypass valve to make startup easier.

In the open position, the valve lever is parallel to the body of the valve. See Fig 6. Close the filter drain valve.

b.

Turn the pressure control knob counterclockwise until all spring tension is relieved. You will be able to feel it. The sprayer is now set at the lowest pressure setting. Turning the knob further will cause it to fall off.

c.

Open the fuel shutoff valve. See Fig 6.

d.

If the engine is cold, close the choke by turning the lever to the ON position (horizontal).

See Fig 6.

3.

Turn and hold the ignition key to START until you hear the engine “catch”, then release the key to

RUN. See Fig 6. If the engine does not start, open the choke a little (push the choke head in).

If the engine floods, open the choke all the way and try again.

e.

After the engine is warm, gradually open the choke lever (push choke head in completely) and close the bypass valve. See Fig 6.

AIR FILTER

3.

Turn the ignition key to OFF.

CHOKE

4.

Close the fuel shutoff valve.

5.

Disengage the gun safety latch. Hold a metal part of the gun firmly to the side of a grounded metal pail, and trigger the gun to relieve pressure.

FUEL

SHUTOFF

VALVE

PRESSURE

CONTROL

KNOB

6.

Engage the gun safety latch.

7.

Open the pressure drain valve, having a container ready to catch the drainage. Leave the valve open until you are ready to spray again.

If you suspect that the spray tip or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, wrap a rag around the tip guard retaining nut or hose end coupling and VERY

SLOWLY loosen the part to relieve pressure gradually, then loosen completely. Now clear the tip or hose.

1.

Prepare the Fluid a.

Prepare the fluid according to the fluid manufacturer’s recommendations.

10 b.

Place the pump or suction tube into the fluid container.

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BYPASS

VALVE

Fig 6

ON/OFF

SWITCH

7874A

NOTE: In cold weather, run the engine for about 15 minutes with the bypass valve open before starting the displacement pump, to help avoid hydraulic motor stalling.

f.

Follow the Pressure Relief Procedure

Warning on page 10, to shut off the sprayer.

WARNING

To stop the engine in an emergency, turn OFF the ignition key. Close the bypass valve if possible.

See Fig 6. Then follow the Pressure Relief Procedure Warning on page 10.

Operation

If the motor stalls during operation, turn OFF the ignition key. With your hand, firmly press straight down on the motor reset button. Now try to restart the sprayer. If it will not start, refer to the separate motor manual,

307158.

CAUTION

The engine throttle has been set and locked at 3000

RPM. The sprayer warranty will be voided and the hydraulic pump life shortened if this adjustment is changed.

CAUTION

Never use a hammer to depress the reset button, as it could cause serious internal motor damage.

4.

Prime the Pump a.

Be sure the gun safety latch is engaged.

b.

Don’t install the spray tip yet!

c.

If the engine has not been started, follow the procedure in Step 2., page 10.

d.

Disengage the gun safety latch.

e.

Point the gun into a grounded metal pail and hold a metal part of the gun firmly against the pail. See the WARNING below.

f.

Squeeze the trigger and slowly turn the pressure control knob clockwise just enough to start the pump. See Fig 6.

g.

Operate the pump until all air is purged from the pump and hoses and the fluid is flowing freely from the gun.

h.

Release the trigger and engage the safety latch.

i.

Turn the pressure control knob counterclockwise until all spring tension is relieved. You will be able to feel it. The sprayer is now at the lowest pressure setting. Turning the knob further will remove it.

j.

Follow the Pressure Relief Procedure on page 10. Then install the spray tip in the gun as instructed in the separate gun or tip instruction manual. If you are using the RAC IV supplied with this sprayer, see manual 308644.

5.

Adjusting the Pressure a.

Turn the pressure control knob clockwise to increase and counterclockwise to decrease the pressure. Tighten the knob locknut to set.

b.

Always use the lowest pressure that is necessary to completely atomize the fluid.

CAUTION

Operating the sprayer at a higher pressure than necessary wastes fluid, causes early tip wear, and shortens the sprayer life.

c.

If more coverage is needed, use a larger tip rather than increasing the pressure.

d.

Check the spray pattern. The tip size and angle determines the pattern width and flow rate. See the separate manual received with your gun.

6.

Cleaning a Clogged Tip

WARNING

INJECTION HAZARD

To reduce the risk of a fluid injection injury, NEVER hold your hand, body or a rag in front of the spray tip when cleaning or checking for a cleared tip. To reduce the risk of a fire or explosion, always hold the gun firmly against the side of a grounded metal waste container when checking to see if the tip was cleared or when using a self–clearing tip.

a.

Follow the Pressure Relief Procedure

Warning on page 10.

b.

Clean the front of the tip frequently during the day to keep the fluid from building up and clogging the tip. To clean, and to clear a tip if it clogs, refer to your separate gun instruction manual. If you are using the RAC IV tip guard and SwitchTip, refer to manual 308644.

7.

Shutting Off the Sprayer a.

Whenever you stop spraying, even for a short break, follow the Pressure Relief Procedure

Warning on page 10.

b.

Clean the tip and gun as recommended in your separate gun or tip manual.

c.

Flush the sprayer at the end of each work day if using water–based fluid or if it could harden in the sprayer over night. See FLUSHING , page 8. Use a compatible solvent to flush, then fill the pump and hoses with solvent such as mineral spirits to help prevent pump corrosion. Relieve pressure!

d.

For long term shutdown or storage, always fill the sprayer with mineral spirits to prevent pump corrosion. Relieve pressure!

8.

Adjusting the Intake Valve Ball Travel.

a.

The pump is set to handle medium volume, low viscosity fluid. To adjust the pump for higher flow or heavier viscosity fluid, disassemble the intake valve as instructed in manual 309340 and move the ball stop pin to a higher set of holes. This increases the ball travel.

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11

Maintenance

1.

Always stop the pump at the bottom of its stroke when you take a break and at the end of the day. This helps keep fluid from drying on the rod and damaging the packings.

2.

Keep the displacement pump packing nut/wet cup 1/3 full of TSL at all times. The TSL helps protect the packings and rod.

3.

Check the tightness of the packing nut daily.

It should be tight enough to stop leakage but no tighter.

CAUTION

Proper engine and hydraulic oil level is important to prevent costly damage to the sprayer. Check it as often as recommended in Steps 4 and 5., below.

4.

Check the hydraulic oil level weekly. The oil must be up to the top mark on the dipstick. Use only Graco Hydraulic Oil.

5.

Check the engine oil level at least weekly. The oil must be up to the FULL mark on the dipstick.

The engine should not use more than one ounce of oil per hour of operation. Consult the engine manual, supplied, for additional recommended maintenance.

6.

Inspect the return line filter frequently for clogging. Replace it after every 500 hours of operation or every 6 months, whichever comes first. A clogged or worn out filter reduces filter capability and will damage the hydraulic pump.

7.

Check the battery water level periodically and refill as necessary.

8.

Change the hydraulic oil after every 2000 hours of operation or every 12 months, whichever comes first. For continuous operation in temperatures above 85 _ F (30 _ C), change the oil after every 1000 hours or 6 months of use. See Step 9.

for the procedure.

9.

To change the hydraulic oil: a.

Follow the Pressure Relief Procedure

Warning on page 10.

b.

Place a waste container under the drain plug of the hydraulic reservoir. See Fig 7. Unscrew the plug and drain the reservoir. Reinstall the plug before proceeding.

c.

Remove the nuts and reservoir cover.

d.

Remove the return line filter and install a new filter assembly.

e.

Inspect the inlet filter and replace it if needed.

f.

Install the reservoir cover and nuts. Then pour in five gallons (19 liters) of Graco Hydraulic Oil through the intake filter. See Fig 7. Install the fill cap.

HYDRAULIC

OIL FILL

CAP

NUTS

COVER

INLET

FILTER

CAUTION

Cleanliness is essential when servicing the hydraulic system. Use special care to avoid getting dust or dirt into the hydraulic system to prevent damage to the hydraulic components.

RETURN

LINE

FILTER

Fig 7

HYDRAULIC OIL DRAIN

PLUG LOCATED

UNDER RESERVOIR

ENGINE OIL

FILL PLUG

7875A

12

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Troubleshooting

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief

Procedure on page 10.

Check everything in the troubleshooting chart before disassembling the sprayer.

PROBLEM

Gas engine doesn’t work properly.

Gas engine will not start.

Gas engine operates, but displacement pump doesn’t operate.

CAUSE

Hydraulic motor stalled.

SOLUTION

Consult engine manual, supplied.

Check battery.

Turn the ignition key to OFF. Firmly press straight down on motor reset button. Restart sprayer, see page 10. If it doesn’t start, see manual 307158.

Increase pressure. See page 11.

Clean the filter.

Displacement pump operates, but output is low on upstroke.

Displacement pump operates but output is low on downstroke and/ or on both strokes.

Paint leaks into wetcup

Pressure setting too low.

Displacement pump outlet filter (if used) is dirty or clogged.

Tip or tip filter (if used) is clogged.

Hydraulic fluid too low.

Hydraulic pump worn or damaged.

Hydraulic motor worn or damaged.

Displacement pump rod seized by dried paint.

Piston ball check not seating properly.

Piston packings worn or damaged.

Piston packings worn or damaged.

Intake valve ball check not seating properly.

Loose wet–cup

Throat packings worn or damaged.

Piston rod seal worn or damaged.

Remove tip and/or filter and clean.

Shut off sprayer and add fluid immediately*. See page 5.

Return sprayer for repair.

Return sprayer for repair.

Service pump. See manual 309340.

Service piston ball check. See manual 309340.

Replace packings. See manual 309340.

Replace packings. See manual 309340.

Service intake valve ball check. See manual

309340.

Tighten just enough to stop leakage.

Replace packings. See manual 309340.

Replace these parts. See manual 307158.

Excessive leakage around hydraulic motor piston rod wiper.

Fluid delivery is low.

The sprayer overheats.

Spitting from gun.

Pressure setting too low.

Displacement pump outlet filter (if used) is dirty or clogged.

Hydraulic pump is worn or damaged.

Hydraulic motor is worn or damaged.

Large pressure drop in fluid hose.

Increase pressure. See page 11.

Clean filter

Return sprayer for repair.

Return sprayer for repair.

Use larger diameter hose.

Cooler or blower is worn or damaged.

Replace. See page 15.

Air in fluid pump or hose.

Fluid supply is low or empty.

Check for loose connections on siphon assembly, tighten, then reprime pump.

Refill supply container.

*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid. See pages 5 and 20.

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13

Replacing the Hydraulic Pump

1.

Follow the Pressure Relief Procedure Warning on page 10. Let the hydraulic system cool before beginning the service procedure.

2.

Unscrew the reservoir drain plug (51), having a container ready to catch the draining fluid.

3.

Disconnect the hose (7) from the bypass valve (9) by loosening the hose clamp (8). See Fig 8.

4.

Loosen the hose clamp (8) and pull the hose (85) off the hose insert (5) near the elbow (3). See Fig

8.

5.

Loosen the hose clamp (54) on the hose (53) just above the hydraulic pump (107). See Fig 8.

6.

Loosen the tube fitting nut (18) of hose (22). See

Fig 8.

7.

Remove the two capscrews (150), lockwashers

(66) and washers (64) holding the pump (107) to the support (117). See Fig 8.

85

113

112

117

53

5

8

152

3

54

52

4

8.

Pull the pump straight off the pump support.

9.

Loosen the setscrews (108) on the pump half of the coupler (109). See Fig 9.

10. Remove all fittings from the old pump and install them on the new pump in the same order.

11. Check Dimension A as shown in Fig 9. When the dimension is correct, tighten the setscrews (108), slide the new pump assembly onto the pump support (117) and recheck the dimension.

CAUTION

The correct coupling dimension is critical to avoid improper coupler engagement to the coupler spider which will damage the coupler and make the sprayer inoperable.

12. Reconnect the hoses. Reinstall the reservoir plug

(51), and refill the reservoir with clean, Graco approved hydraulic oil.

7

8

9

22

18

107

150,66,64

49,66

115

114

109

108

Fig 8

7876A

14

307616

Replacing the Cooler and Blower

1.

Follow the Pressure Relief Procedure Warning on page 10. Let the hydraulic system cool before beginning the service procedure.

2.

Remove the hydraulic pump as instructed in the previous section.

3.

Disconnect the cooler to reservoir return hose (7.) by loosening the hose clamp (8). See Fig 8.

4.

Remove the cooler capscrews (49) and lockwashers (66). See Fig 8.

5.

Remove the fan guard (23). See Fig 8.

6.

Pull the cooler (115) straight out.

7.

Inspect the rubber pad (116) for wear and replace if necessary. See Fig 9.

8.

Inspect the blower wheel (114) for wear. See Fig 8.

If it needs to be replaced, follow Steps 8a–8e.

a.

Unscrew the setscrews (108) from the engine half of the coupler (109). Unscrew the blower setscrews (B). See Fig 9.

b.

Remove the capscrews (112) and lockwashers

(113) holding the pump support (117) to the engine and pull the support off. See Fig 8.

c.

Pull the pump support and blower off far enough for the blower to fall out of the bottom of the housing.

d.

Install a new blower. Secure the pump support

(117) to the engine. See Fig 8.

e.

Check Dimension A as shown in Fig 9 and tighten the coupler setscrews (108). Butt the blower hub up to the coupler half, keeping the blower in full contact with the coupler, and tighten the blower setscrews (B).

CAUTION

The correct coupling dimension is critical to avoid improper coupler engagement to the coupler spider which will damage the coupler and make the sprayer inoperable.

9.

Install the cooler.

10. Fold the flaps of the pad (116) toward the cooler fins and install the fan guard (23), capscrews (49) and lockwashers (66). See Fig 8.

11. Reinstall the hydraulic pump and reconnect all hoses.

ENGINE

108

117

23

115

A

DIMENSION A

0.05” 0.010

(1.27 mm –0.254)

A

107

109

108

116

TOP VIEW

Fig 9

307616

15

Displacement Pump Service

Disconnect the Displacement Pump

1.

Flush the pump if possible. Stop the pump on the down stroke.

2.

Follow the Pressure Relief Procedure Warning on page 10.

3.

Remove the suction tube and fluid hose from the displacement pump.

4.

Unscrew the three tie rod locknuts (48). See

GH733 Sprayer Parts Drawing .

5.

Unscrew the shouldered nut (35). Pull the displacement pump (46) off the tie rods (47).

6.

Screw the jam nut (90) up onto the connecting rod

(91).

7.

Remove the lower cotter pin (89) and unscrew the connecting rod (91) from the displacement rod (A).

8.

Refer to separate manual 309340 for displacement pump repair instructions.

Reconnecting the Displacement Pump

1.

Screw the connecting rod (91) into the displacement rod (A) and replace the lower cotter pin (89).

Screw the jam nut (90) all the way down. See

GH733 Sprayer Parts Drawing .

2.

Mount the displacement pump (46) onto the tie rods (47).

3.

Screw the shouldered nut (35) onto the hydraulic motor (29). Screw the tie rod locknuts (48) onto the tie rods (47) and torque to 35–50 ft-lb (47–68

N.m).

4.

Reattach the hoses to the displacement pump.

5.

If the grounding wire was disconnected before service, be sure to reconnect it before operating the sprayer.

6.

Start the pump and operate it slowly to check the tie rods for binding. Adjust the tie rod locknuts, if necessary to eliminate binding.

16

307616

Complete Sprayer Parts Drawing

509 Model 230975, GH 733 Sprayer

Includes items 501 to 510

REF

NO.

PART NO.

DESCRIPTION

501 231733

502

503

504

505

506

507

508

509

510

100380

158212

218659

215245

156173

155665

150287

214912

235463

QTY

GH 733 SPRAYER

(See parts list on page 19) 1

BUSHING, pipe, 1” npt(m) to 1/2” npt(f) 1

BUSHING, 1/2 npt(m) to 3/8 npt(f)

HOSE & GUN KIT,

1 includes items 304 to 309

.HOSE, nylon, 3/8” dia. cpld 3/8 npt(mbe),

1

50 ft (15 m) long

.ADAPTER, 3/8 npt(f) x 3/8 npsm

1

3 swivel

.ADAPTER, 3/8 npt(m) x 3/8 npsm swivel

.ADAPTER, 1/4 npt(m) x 3/8 npt(f)

.HOSE, nylon, 1/4” dia., cpld

1/4 npsm(fbe), 2’4” (0.7 m) long 1

2

1

.AIRLESS SPRAY GUN see manual 307046 for parts 1

*Install this adapter in place of the fluid outlet nipple in the fluid filter.

503

502

505

506

REF 38

505

507

510

508

505

506

307616

17

GH733 Sprayer Parts Drawing

Model 231733, Series D

82

30

29

76

79

77

E

31

34

22

33

A

49

91

178

32

177

47

103

143

38

48

37

36

35

89

46

31

39

150

144

43

9086B

18

307616

GH733 Sprayer Parts Drawing

88

LABEL

83 124

LABEL

1

87

LABEL

71

72

LABEL

173

171

111

172

26

64

28

27

75

LABEL

31

66

72

LABEL

143

67

58

168

31

66

60

63

Ref 58

To Engine

172

119

122

41

To Starter

Switch

20

19

120

145

119

59

172

118

55

12

122

119

123

64

28

74

11

13

14

61

56

21

57

307616

19

GH733 Sprayer Parts Drawing

97

153

96

74

28

2

152

Ref 111

169 170

Ref 77

78

93

95

98

94

50

51

4

5

8

154

53

8

7

5

54

85

113

117

112

8

141

106

54

25

52

138

3

108

5

8

142

9

10

107

15

17

16

18

49

110

66

65

64

137

109

23

115

109

108

110

114

24

Ref 22 7879A

20

307616

Model 231733, Series D

Includes items 1–178

REF

NO.

PART NO.

DESCRIPTION QTY

1

2

3

4

5

7

107074

106114

107053

107128

107050

178859

BREATHER, fill cap

STRAINER, inlet

ELBOW, pipe, 90

_

, 1/2 x 3/8 npt

TEE, service

INSERT , hose, 1/2 npt(f)

HOSE, rubber, 5” (125 mm)

8 102473 CLAMP , hose

9 210658 VALVE, ball 3/8 npt(m)

10 165472 ELBOW, pipe, 90

_

, 3/8 npt(f)

11 106039 WHEEL

12 106123 CAPSCREW, hex hd, 1/2 x 4”

13 100018 LOCKWASHER, spring, 1/2”

14 100321 NUT, hex, 1/2” thread

15 158979 NIPPLE, pipe, reducing, 3/8 x 1/2 npt

15 188344 NIPPLE, pipe, reducing, 3/8 x 1/2 npt

16 103475 TEE, pipe, 1/2 npt(f)

17 158491

18 107052

NIPPLE, short, 1/2 npt

FITTING, tube, flared

19

20

21

22

107126

107069

101354

513575

23 178751

24 179714

25 100213

BATTERY, 12 volt, “L” style terminals

CLAMP, battery

PIN, straight, spring

HOSE, hydraulic supply, nylon, 3/4” ID, cpld 1–1/16” fbe, 30” (762 mm)

GUARD, fan

SPACER

NIPPLE, pipe, 3/8 npt x 3”

26 217469

27 101578

FRAME, pump

28 100214 LOCKWASHER, spring, 5/16”

29 217022 MOTOR,

1

CAPSCREW, hex head, no. 8–32 x 0.38” 4

18

1

1

1

1

1

1

2

30 177755 see manual 307158 for parts

LABEL, identification

31 101566 NUT, lock, 3/8–16

32 106212 CAPSCREW, 3/8–16 x 2

33 177765

34 177652

PLUG

HANDLE

35 244819 COUPLING,

36 197340 COUPLING,

37 158586 BUSHING, 1 x 3/4”

38 111337

39 157785

TEE, 3/4” npt(f)

SWIVEL, 3/4” m x f

41 113952 CABLE, battery, positive, 26”, 6 awg

43 245468 TUBE, , inlet

46 244416 PUMP, displacement see manual 309340 for parts

6

2

2

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

4

4

4

1

6

1

3

1

1

2

1

1

1

1

48

66

101712

59 107068

NUT, lock, type “E” 5/8”– 11

49

50

100101 CAPSCREW, hex head, 3/8–16 x 1”

104444 O–RING, r

51 104126 PLUG, box, 3/4”

52 107049 INSERT, hose, 3/4 npt(f)

53 178791 HOSE,

54 101818 CLAMP, hose, for 13/16” to 1–1/2” OD

55 178773 LEG,

56 177641 WASHER,

57 177570 AXLE

58 113951 CABLE, battery, negative, 13” , 6 awg

HOOK, bolt, 1/4” thread

60 191955 PLATE,

61 216141 SUPPORT,

63 246015 MOUNT, motor

64 100023 WASHER,

100133 LOCKWASHER,

14

8

1

1

1

1

1

2

1

1

1

1

1

2

3

3

5

1

GH733 Parts List

67 102547 CAPSCREW, hex hd, 3/8 x 2.5”

71 218125 RESERVOIR

72 185951* LABEL,

74 100188 NUT, heavy hex, 5/16–18 unc–2a

75

76

177807 LABEL, identification

106053 ELBOW, , 1–1/16” thread

77 513574 HOSE, hyd rtn, 1” x 20.75”

78 107127 ADAPTER, male, 1–5/16” x 3/4”

79 620188 ADAPTER, 1” (m) x 3/4 x 1/2 x 3/8 (f)

82

83

85

87

105430 NUT, seal, 1” npt

191957 SHIELD,

178795 HOSE,

177808 LABEL, identification

88 178935 LABEL,

89 244820 CLIP, hairpin, with lanyard

91

93

94

95

197341

107125

105429

178750

ROD, adapter

ELBOW, 90 _ street, 3/4 npt(m)

NUT, seal, 3/4 npt

FITTING, return, 1” npt(m) x 3/4 npt(f)

96 178794

97 500054

98 107067

103 112798

FILTER, fluid

BUSHING, hex hd

1

1

O–RING, buna–n 1

SCREW, mach, hex washer hd, 8 x 3/8” 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

10

1

4

1

105 219099

106 100187

107 178872

108 100421

109 106063

110 605358

111 113822

112 107143

KNOB, pump

NUT, hex, 5/16”

PUMP, vane, hydraulic

SETSCREW, 5/16” X 3/8”

COUPLER

KEY, 1/4”

ENGINE, 16 HP, OHC

CAPSCREW, sch, 7/16 x 1.25”

2

2

1

4

1

1

1

2

113 100052

114 178792

115 178788

116 178861

117 178786

118 102169

119 100016

120 100011

122 100015

123 178787

130 106229

131 206994

132 185016

137

138

139

143

144

100004

107032

158683

140 108426

141 183574

142 183575

237686

244683

145 158233

150 100896

167 110838

168 191958

169 191959

170 112179

LOCKWASHER, spring, 7/16”

BLOWER

COOLER

PAD

SUPPORT, pump

CAPSCREW, hex hd, 5/16 x 1.5

LOCKWASHER, spring, 1/4”

WING NUT, 1/2”

NUT, hex, 1/4–10 unc

SHELF, battery

NIPPLE

TSL, 8 oz. not shown

LABEL, Caution

CAPSCREW, hex hd, 3/8–16” x 1.25”

ELBOW, 90 _ street, 3/8 npt (m x f)

ELBOW, 90

_

, 3/8 npt(mxf)

O–RING, buna–n

HOSE, rubber tube, 4.5”

NIPPLE, barbed hose, 3/8–18 npt(f)

GROUND WIRE & CLAMP

VALVE, pressure drain

WASHER, flat

BUSHING, 3/4 x 3/8”

LOCKNUT, 5/16”

BRACKET, switch

GUARD, muffler 1

SCREW, thread forming, (M5 x .8 mm) 1

4

1

1

2

1

1

1

1

2

1

1

1

4

1

1

2

4

2

2

1

4

1

1

1

1

171 113819

172 100022

173 100016

174 290320

175 290319

176 070401

177 100101

178 625057

NUT, 1/4”

SCREW, cap, 1/4”

WASHER, lock

LABEL, identification

LABEL, caution

TUBING, electrical, 13”

SCREW, cap, hex hd, 1 x 3/8–16” unc-2a 4

BRACKET, motor, hydraulic 1

1

1

2

4

2

1

*DANGER and WARNING labels are available at no charge.

307616

21

Notes

22

307616

Technical Data

Engine . . . . . . . . . . . . . . . KOHLER Model TH16 OHC 4 cycle twin cylinder, air cooled, 16 HP, (12 Kw)

Gasoline . . . . . . . . . . . . . . . . . . . . 1.7 gallon (6.4 liter capacity) consumes 1.3 gal/hr (4.9 liter/hr)

Hydraulic Fluid Sump

Hydraulic Pressure

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . .

5 gallon (19 liters)

1300 psi (89 bar)

Displacement Pump . . . . . . . . . .

10.2 gpm (39 l/min)

3500 psi (240 bar, 24 MPa)

Maximum Working Pressure

3 gpm (11.4 lpm) output,

15 cycles/gallon

Pump Fluid Outlet Size

Fluid Filter Outlet Size

. . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

1 in. npt(f)

1/4 npt(f)

Wetted Parts:

Displacement Pump

Filter

. . . . . . . . . . . . . . . . . . .

Tungsten Carbide,

Steel, Nitralloy,

PTFE r , Leather

. . . . . . . . . . . Aluminum, Carbon steel, Stainless Steel,

Weight (dry w/o packaging)

Height

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

465 lb (103 kg)

50.5 in. (1.3 m)

Length

Width

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

48 in. (1.2 m)

29 in. (736 mm)

Sound Levels*:

Sound Pressure

Sound Power

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

91 dB(A)

106 dB(A)

* Measured at maximum normal load conditions.

NOTE: PTFE r

Accessories

Must be purchased separately.

GRACO–APPROVED HYDRAULIC OIL

169236

207428

5 Gallons (20 liters)

1 Gallon (3.8 liters)

DANGER LABELS

The English language DANGER label shown on page 4 is also on your sprayer. If you have painters who do not read English, order one of the following labels to apply to your sprayer. The drawing below shows the best placement of these labels for good visibility.

Order the labels directly from Graco, free of charge. Toll Free: 1–800–328–0211

French 186956

Spanish 185961

German 186041

Greek 186045

Korean 186049

English 185593

Graco Phone

Number

TO PLACE AN ORDER , contact your Graco distributor, or call this number to identify the distributor closest to you: 1–800–690–2894 Toll Free.

Apply other language here

7871b

307616

23

Graco Warranty

Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. With the exception of any special extended or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written recommendations.

This warranty does not cover, and Graco 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-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of

Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or maintenance or structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect. If the claimed defect is verified, Graco 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.

Graco’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.

GRACO 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 GRACO.

These items sold, but not manufactured by Graco (such as electric motors, gas engines, switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco 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 Graco, or otherwise.

FOR GRACO 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.

ADDITIONAL WARRANTY COVERAGE

Graco does provide extended warranty and wear warranty for products described in the “Graco Contractor Equipment Warranty

Program”.

24

All written and visual data contained in this document reflect the latest product information available at the time of publication.

Graco reserves the right to make changes at any time without notice.

Sales Offices: Minneapolis, Detroit

International Offices: Belgium, Korea, Hong Kong, Japan

GRACO INC.

P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441

http://www.graco.com

PRINTED IN U.S.A. 307616 September 1983, Revised 2/2003

307616