Graco GH 733 HYDRA-SPRAY, 226-961 Instructions-parts List Manual

INSTRUCTIONS-PARTS

LIST

.e

307m4=

Rev.

C

ORAC0

.

SUPERSEDES A

This

manual contains

IMPORTANT

WARNINGS

and

INSTRUCTIONS

READ AND RETAIN FOR REFERENCE

Gna

Powered

Airless

SUDD~V

Pump

45~W

psi

(310

bar)

MAXIMUM

WORKING PRESSURE

Model

226-961

Series

B

Less

hose,

swivel,

gun

and

tip.

.

..

.,

,.

'..

..

.

.:

GRACO INC. P.O.

Box

1441

MINNEAPOLIS,

MN

55440-1444

@COPYRIGHT

1981

GRACO

INC.

WA

RNlNG

HIGH

PRESSURE SPRAY CAN CAUSE SERIOUS INJURY.

FOR

PROFESSIONAL

USE

ONLY.

OBSERVE

ALL

WARNINGS.

Read

and

understand.all

instruction

manuals

before

operating

equipment.

'

INJECTION HAZARD

Fluids under high pressure from spray

or

leaks

can

penetrate the skin
and cause extremely serious injury, Including the need for
amputation.

NEVER

point the spray gun et anyone

or

any part

of

the body

NEVER

put hand or fingers over the spray tip.

NEVER

try to stop

or

deflect leaks with your hand or body

ALWAYS

have the tip guard in place when spraying.

MEDICAL TREATMENT

If

any fluid appears to penetrate your skin, get

EMERGENCY MEDICAL CARE AT ONCE.

DO

NOT TREAT AS A SIMPLE CUT.

Tell the doctor exactly what fluid was iniected. For treatment instruc-

-.

~~~

tions have your doctor

call

the

NATIONAL POISON CENTER NETWORK

i4121681-6669

USE EXTREME CARE WHEN CLEANING TIPS AND

SERVICING.

Always follow this pressure relief procedure when shutting

off

the unit

for any reason: shut

off

the engine. trigger the spray gun. engage fhe

trigger EafeQ, close the en ine fuel cock and

0

en the drain

VE~VE.

SPRAY GUN SAFETY

When spray gun or dispensing valve is not ECtUaib spraying. ahays
set the gun safeQ latch

in

the Closed or "SAFE position, making the

trigger inoperative.

00

NOT REMOVE

OR

MODIFY any

part

of the gun.

Check diffuser operation by using the lowest Pmible spray pressure

with spray tip removed. Trigger gun end maintain firm metal to metal

contact belwean aun and metal waste container. Fluid emitted should
be diffused into

ai

irregular streern

CHECK OPERATION OF ALL GUN SAFETY DEVICES BEFORE
EACH USE.

AVOID COMPONENT RUPTURE

Always be sure that all components used with this unit have e max-

mum working pressure rating of at

least

4500

pai

(310 barl. which is

the maximum working pressure of the GH

723.

NEVER

alter

or

modify the equipment.

Before each use, check hoses for weak, worn or damaged conditions
that may be caused by traffic, sharp corners, pinching, kinking end
general wear. Tighten all fluid connections securely before each use.

REPLACEany damaged hose.

NEVER

use tape

or

any device to mend

the hose.

PREVENT STATIC SPARKING

Always be sure

all

equipment end objects being sprayed are Properly

grounded. This

unit

is equipped with a grounding wire end clamp. The

fire

or

explosion.

high Velocity flow of fluid creates static electricity. Sparks may cause

Useonly conductiveor grounded fluid hoses. Be sure gun is grounded

through hose connections. Check ground continuity

in

hose end
equipment once e week. Overall (end to end) resistance of un­pressurized hose must not exceed

29

megohms for any coupled

length or Combination of hose lengths.

When flushing equipment, remove spray tip,

use

the lowest possible
pressure, end maintain firm metal to metal contact between gun and
metal waste container. This reduces the chance of static sparking.

GAS ENGINE PRECAUTIONS

ALWAYS

locate unit et least

20

feet awayfrom spraying area because

of possible sparking hazard from gasoline engine.

NEVER

fill

fuel tank while engine is running or hot. Avoid the possibil-

ky

of spilled fuel causing a fire. Always refuel slowly to avoid spillage.

NEVER

operate engine

in

e closed building

unless

the exhaust is piped

outside. The exhaust contains carbon monoxide, a poisonous,

possible death.

odorless and invisible gas, which

if

breathed causes serious illness end

Always close the fuel cock and remove the ignition cable from the
spark plug before adjusting

or

servicing any mechanical parts of the

the mechanical parts end

C~USE

serious injury to the operator.

unit. Operating

E

mechanical pert by hand could start the engine and

NEVER

alter the throttle setting.

about

390

psi

(245

bar) working pressure.

.

Precaution is the best insurance against

en

accident. When starting

engine. maintain a safe disfence from moving pem of equipment.

The maximum full loEd engine speed is

28W

RPM

which occurs

Et

IMPORTANT

United States Government safer, standards have been adopted under the Occupational SafeQ End Health Act. These standards-perticulerb the
General Standards, Pert 1910, end the Constructon Standards, PaR 1926-should be consulted.

307-465

3

GElTlNG READY

NOTE:

Reference numbers and letters .in paren­theses

in

the text refer to the Typical Installa-

tion; Figures 1 through

9,

and the Parts

Drawing.

Refer to back page for the available Graco accessories.

ing heavy fluids andlor when very long hose lengths are

Install a check valve near the pump outlet when pump-

used.

See

ACCESSORIES.

Install an accessory material handling hose

and

applica-

tion valve to the

1

in.

npt(f) tee (141) of the displace.
ment pump (105). Refer to the Parts Drawing. Do not
install the spray tip on the gun yet; wait until the pump

has been flushed.

See

page

5.

the sprayer are secure. Refer to the Typical Installation

Be sure that the fittings on all of the hose connections

in

and the Parts Drawing.

Seal Liquid (TSL)

so

it

is about 1/2 full. Refer to Fig

9,

Fill the wet-cuplpacking

nut

1106) with Graco Throat

page 10.

Lubrication

CAUTION

I

Check the hydraulic oil and engine oil levels before

operating the sprayer. Add the appropriate oil,

if

necessaw.

I

-~

~-

filter (9). If there is enough hydraulic oil in the system,

Check the hydraulic oil. Unscrew the cap of the intake

there should be

1

in.

(25 mml of oil visible in the bottom

approved hydraulic oil to the proper level. A completely

of the filter screen.

See

Fig

1.

If necessary add Graco-

full hydraulic system contains approximately 5 gallons

(18.9 liters)

of

oil.

See

the ACCESSORIES section for

Graco-approved hydraulic oil.

9

Fig

1

Check

the

engine oil. Unscrew the oil fill plug (C); the

dipstick is attached.

See

Fig

2.

Without threading the

plug into place, check the oil level. The oil should be up.'
to the top mark on the dipstick. Add fresh oil if
necessaw.

RECOMMENDED LUBRICATING OIL: Use a high quali-

ty,

detergent oil classified "FOR SERVICE SD or

SF',

for regular use and for the breaking-in of a new engine.

I

GRADE

OF

OIL CHART

3

SEASON

OR

TEMPERATURE

SAE 30

Spring, Summer, Autumn

GRADE OF OIL

1

34PF

toO°F

Winter

SAE 1OW-30

I

Below

Oo

I

SAE

5W-20

Crankcase capacity: 2 quarts (1.9 liters)

Fuel

Fill the fuel tank

(D)

with clean, fresh gasoline. Refer

to

liters). Use only reputable, well-known brands of

Fig

2.

The tank holds approximately 1.5 gallons

(5.7

unleaded Regular Grade gasoline. The minimum octane

tane elsewhere. At the maximum operating speed of

requirements are

86

octane in the U.S.A., and 96 oc-

2800 RPM, the gasoline consumption is about 1.3

gallonslhour (4.9 liters/hourl.

WARNING

Always shut

off

the engine and let

it

cool before

refilling the fuel tank. Close the fuel cock (E).

Refer to Fig

2.

Be sure that the air vent

in

the tank

fill

cap IF) is not plugged

so

that

fuel

can flow to

the carburetor. Refer to Fig 6, page 6. Then

fill

the tank.

a fire.

Be careful not to spill any fuel, which could cause

Grounding

Connect the grounding clamp (138) to a good ground
such as a steel water pipe. Check your local codes for

regulations concerning electrical grounding.

~~~~~

4

307-465

OPERATION

Starting the Engine

CAUTION

Always open the bypass valve

(78)

before starting

the engine.

Open the bypass valve

(78)

and the fuel cock

(E).

The

bypass valve is open when the lever is parallel to the

screwed out as far as

it

will go. See Fig

3.

body of the valve. The fuel cock is open when

it

is

Fig

3

,'

w

pull the rope firmly and rapidly to start the engine. If the
engine does not start after one or

two

attempts, try
opening the choke a little further. If the engine floods,
open the choke all the way and continue pulling the

rope.

After the engine has warmed 'up, gradually open the

choke lever

(GI

and close the bypass valve

(78).

See

Fig 3 and

4.

Raise the foot brace and engage the hitch

(34).

In

cold weather, run the engine for about 15 minutes
before starting the material pump. This helps to make
sure the hydraulic motor does not stall.

Stopping the Engine
Open the bypass valve

(78)

and depress the stop button

(J),

holding the button down until the engine stops.

Close the fuel cock

(E).

See

Fig

3.

Flush the Material Pump

Your new

unit

was tested

in

oil and the oil was

left

in

to
protect the material pump parts. Before using the
sprayer, flush the pump as instructed below.

1. Pour enough clean, compatible solvent to fill the
system into a large empty metal pail.

2.

Place the suction tube into the pail, or

tilt

the unit

back

(it

will support itself), place the pail under the

pump, then

tilt

the unit forward to lower the pump

into the pail.

Lower the foot brace by disengaging

it

from the hitch

(34).

Refer to Fig

3.

3.

Be sure the bypass valve (78) and fuel cock

(E)

are

oDen. Turn the Dressure control knob

(F)

all

the way

.If the engine is cold, close the choke by turning the lever counterclockwise to keep pump from operating.

or the air temperature is high, open the choke half way

(G)

so

it

is horizontal.

See

Fig

4.

If the engine is warm, See Fig

3.

Start the engine.

or completely.

4.

Close the bypass valve

(78).

Point the gun into a

metal waste container, holding a metal part of the

gun firmly against the metal pail. See Fig 5.

Squeeze the trigger. At the same time, slowly turn
the pressure control knob (F) clockwise just enough
to operate the pump. Always use the lowest possi-

ble pressure when flushing the unit. Operate the

pump until clean solvent comes from the gun. Then

release the trigger and engage the trigger safety.

Fig

4

Fig

5

starter rope.

Brace one foot against the foot brace and pull the

CAUTION

Always hold on to the starter rope while pulling or

,rewinding

it.

If the rope rewinds too quickly,

it

can

jam the starter assembly.

~

then let the rope rewind slowly into the starter. Then

Pull the engine over against the compression stroke and

5. Check all hose connections and fittings for leakage.
If there are any leaks, shut

off

the engine and
relieve the fluid pressure before tightening the fit-
tings. Then turn the

unit

on and check to be.sure

the leaks have stopped.

6.

Remove the pump or suction hose from the solvent
pail. Trigger the gun to force the solvent out of the

engine. Engage the trigger safety.

hose. Open the bypass valve

(78)

and shut

off

the

30745'

5

Prepare the Material end Prime the Pump
Prepare your material according to the manufacturer's
instructions.

Place the displacement pump or the suction tube into
the material supply container. Install a spray tip in the
gun

(see

the gun instru,ct#on manual), and

start

the

engine. Trigger

the

gun Into a metal waste container,
holding a metal part.of the gun firmly against the metal
container. Refer to Fig

5.

Hold the gun trigger open until

all

air

is

forced out of the system. Release the trigger,

engage the trigger safety, and let the pump

stall.

NOTE:

The GH

733

can be tilted backwards and will

support itself while placing

a

5

gallon pail

under the material pump.

Adjusting the Pressure
Turn the pressure control knob IF) to adjust the fluid
pressure.

See

Fig

6.

Turn the knob clockwise to

in-

crease the pressure and counterclockwise

to

decrease

to completely atomize the material. Check

the spray

the

pressure. Always use the lowest pressure

necessary

pattern. The tip size and angle determines the panern
width and flow rate. Don't

try

to get more coverage by

increasing the pressure; use a larger tip instead.

See

the

separate instruction manual

306-997

for the correct

method'of airless spraying.

-H

-

:leaning a Clogged Tip

Pressure Relief Procedure

WARNING

Always relieve system pressure whenever you are
done spraying for a while and before installing,
removing or cleaning any parts to avoid possible
injury from high pressure fluid in the system.

Always

follow

this procedure: shut

off

the engine

by depressing the stop bunon

(J),

trigger the
spray gun, engage the trigger safety, close the
engine fuel cock

(E),

and slowly open the dram

valve

(143).

Leave the drain valve open until you

are ready to use the unit again.

Clean out the front of the tip frequently during the day's
operation with a solvent soaked brush. This helps to
prevent material build up and tip clogging.

If the spray tip clogs while spraying, follow the Pressure
Relief Procedure, above. Loosen the tip guard slowly
before removing

it

completely. Remove the tip and put

it

and the nozzle of the gun in solvent. Let the tip soak

long enough to dissolve the obstruction, or blow

it

out

with

air

through the front of the'tip. If the

air

and

sol-

vent does not loosen the obstruction, tap the back of
the tip against a flat surface to jar

it

out.

Shutdown and Care

pressure according to the Pressure Relief Procedure,

If you stop spraying for a short time, relieve system

the gun and the tip in solvent.

above. Remove the tip from the gun. Place the nozzle of

overnight in the unit, and for weekend or longer shut-

Flush the unit

if

the material you are pumping will dry

downs. Flush the unit with a compatible solvent, then

leave mineral spirits in the pump during storage to help
prevent corrosion of material pump.

Whenever

it

is possible, park the unit

in

the shade or in a
relatively cool area to reduce the possibility of
overheating.

Remove and clean the gun tip

at

least twice a day when

spraying. Always stop the pump

at

the bonom of

its

stroke when you are through spraying for the day.

periodically and tighten

it

if necessary. Refer

to Fig

9.

Check the tightness

of

the wet-cuplpacking

nut

(106)

page

10.

The nut should be tight enough

to

stop
leakage, but no tighter. Always relieve the system
pressure according to the Pressure Relief Procedure

(see

above) before adjusting the packing nut.

Check the hydraulic oil level occasionally. Unscrew the

cap of the intake

filter

(9);

there should be 1 in.

(25

mm)

of

oil visible in the bottom of the filter screen. Refer to

Fig

7,

page

7.

Use Graco-approved oil only.

See

AC-

CESSORIES.

the filter after every

500

hours

of operation or every

6

Inspect the return line filter

(3)

frequently, and replace

months, whichever comes first.

Refer

to Fig

7,

page 7.

A

clogged filter can cause the cooler to leak or to fail.

6

307-465