Graco Series A Bedienungsanleitung

308–674

Rev. C

Supersedes Rev. B

06169

INSTRUCTIONS-PARTS

LIST

INSTRUCTIONS

This

manual contains important

warnings and information.

READ AND KEEP FOR REFERENCE.

Viscount

Hydraulic Motor and

Displacement Pump

Model 238–349, Series A

GRACO INC. P.O. BOX 1441

MINNEAPOLIS, MN

55440–1441

COPYRIGHT

1996, GRACO INC.

Graco

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

 

Table

of Contents

Warnings 2.

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

Installation 5

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

Operation 7

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

Service 8

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

Disconnecting

the Hydraulic Motor

. . . . . . . . . . .

Reconnecting

the Hydraulic Motor

. . . . . . . . . . .

Disconnecting

the Displacement Pump

10.

. . . . . .

Reconnecting

the Displacement Pump

11.

. . . . . .

Parts 13

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

Motor

and Pump Assembly

13.

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

Warranty 16

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

Graco

Phone Numbers

16.

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

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

or destruction of equipment if you do not follow the

instructions.

WARNING

EQUIPMENT MISUSE HAZARD

Equipment

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

This equipment is for professional use only

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

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

Do not alter or modify this equipment.

Check equipment daily

. Repair or replace worn or damaged parts immediately

Do not exceed the maximum working pressure stated on the equipment or in the

echnical Data

for your equipment. Do not exceed the maximum working pressure of the lowest rated component

in your system.

Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the

Tech-

nical Data

section of all equipment manuals. Read the fluid and solvent manufacturer

’

s warnings.

Handle hoses carefully

. Do not pull on hoses to move equipment.

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

Graco hoses to temperatures above 66

C (150

F) or below –40

C (–40

_F).

ear hearing protection when operating this equipment.

Do not move or lift pressurized equipment.

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



WARNING

INJECTION HAZARD

Spray

from the gun, leaks or ruptured components can inject fluid into your body and cause extremely

serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also

cause serious injury



Fluid injected into the skin is a serious injury

. The injury may look like just a cut, but it is a serious

injury

. Get immediate medical attention.



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



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



Do not stop or deflect leaks with your hand, body

, glove or rag.



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



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



Check the gun dif

fuser operation weekly

. Refer to the gun manual.



Be sure the gun trigger safety operates before spraying.



Lock the gun trigger safety when you stop spraying.



Follow the

Pressure Relief Procedure

on page 7 if the spray tip clogs and before cleaning,

checking or servicing the equipment.

T

ighten all fluid connections before operating the equipment.



Check the hoses, tubes, and couplings daily

. Replace worn or damaged parts immediately

. Do not

repair high pressure couplings; you must replace the entire hose.



Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by

kinks or bends near the couplings.

MOVING

ARTS HAZARD

Moving

parts can pinch or amputate your fingers.



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



Before checking or servicing the equipment, follow the

Pressure Relief Procedure

on page 7 to

prevent the equipment from starting unexpectedly

 

WARNING

FIRE AND EXPLOSION HAZARD

Improper

grounding, poor ventilation, open flames or sparks can cause a hazardous condition and re

sult in a fire or explosion and serious injury



Ground the equipment and the object being sprayed. Refer to

Grounding

on page 5.



If there is any static sparking or you feel an electric shock while using this equipment,

stop spray-

ing immediately

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



Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid

being sprayed.



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



Before operating this equipment, electrically disconnect all equipment in the spray area.



Before operating this equipment, extinguish all open flames or pilot lights in the spray area.



Do not smoke in the spray area.



Do not turn on or of

f any light switch in the spray area while spraying or while operating if fumes

are present.



Do not operate a gasoline engine in the spray area.

TOXIC FLUID HAZARD

Hazardous

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

inhaled, or swallowed.



Know the specific hazards of the fluid you are using.



Store hazardous fluid in an approved container

. Dispose of hazardous fluid according to all local,

state and national guidelines.



Always wear protective eyewear

, gloves, clothing and respirator as recommended by the fluid and

solvent manufacturer

5308-674

Installation

General Information

NOTE:

Reference numbers and letters in parentheses

in the text refer to the callouts in the figures and the

parts drawing.

NOTE:

Always use Genuine Graco Parts and Acces

sories, available from your Graco distributor

Grounding

WARNING

FIRE AND EXPLOSION HAZARD

Before operating the pump, ground the

system as explained below

. Also read

the section

FIRE OR EXPLOSION HAZ

ARD

on page 4.

Pump:

use a system ground wire and clamp. See

manual 308–61

Hydraulic, and fluid hoses:

use only electrically

conductive hoses.

Hydraulic power supply:

follow manufacturer

’s

recommendations.

Spray gun:

ground through connection to a prop

erly grounded fluid hose and pump.

Fluid supply container:

follow your local code.

Object being sprayed:

follow your local code.

Solvent pails used when flushing:

follow your local

code. Use only metal pails, which are conductive,

placed on a grounded surface. Do not place the

pail on a nonconductive surface, such as paper or

cardboard, which interrupts the grounding continu

ity.

o maintain grounding continuity when flushing or

relieving pressure

, hold a metal part of the spray

gun firmly to the side of a grounded

metal

pail,

then trigger the gun.

 

Installation

General

Connect the hydraulic motor (101) and the dis

placement pump (102) as explained on page 8.

See Fig. 1.

CAUTION

Keep the hydraulic system clean

o reduce the risk of damaging the hydraulic power

supply and motor

, blow out all hydraulic lines with air

flush thoroughly with solvent, and then blow out with

air again before connecting the lines to the hydraulic

motor.

Always plug the hydraulic inlets, outlets and lines

when disconnecting them for any reason to avoid

introducing dirt and other contaminants into the

system.

Carefully follow the manufacturer

’

s recommendations

on reservoir and filter cleaning, and periodic changes

of hydraulic fluid. The maximum water content of the

hydraulic oil is 1 percent.

Fig. 1

06169

101

102



Operation

Startup

Before each use,

check

the hydraulic fluid level and

add fluid as necessary to fill the lines.

WARNING

FIRE HAZARD

If hydraulic oil becomes too hot, it can

reach its flash point and cause a fire.

Operating at too high an oil temperature

can also cause faster motor seal wear and leak

age. The recommended hydraulic oil operating

temperature is 80–1

15_F (27–45_

C). If the oil

temperature approaches 130

_F (54_

C), shut of

f the

motor and check the hydraulic oil supply cooling

system, filters, etc. Clean or repair as needed.

Always use Graco-approved Hydraulic Oil or

equivalent. Do not substitute a lower grade oil or

one with a lower flash point.

The equivalent is a premium, ISO grade 46

petroleum-based hydraulic oil containing rust and

oxidation inhibitors and anti-wear agents. Before

using any other type of oil in this equipment,

contact Graco T

echnical Assistance,

1–800–543–0339.

Unauthorized use of lesser

grade oil or substitutes will void the warranty

Shutdown & Care

the

Pressure Relief Procedure W

arning

below.

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

. T

o reduce the risk of

an injury from injection, splashing fluid, or moving

parts, follow the

Pressure Relief Procedure

whenever you:

are instructed to relieve the pressure,

stop spraying,

check or service any of the system equipment,

or install or clean the spray tip.

Set hydraulic pump lever in by-pass position.

Place an empty pail under the drain valves to

catch drainage from the drain valves.

Open all paint drain valves.

Place an empty pail under guns to catch drainage

from the guns.

Actuate guns to relieve pressure.

Shut of

f engine.

Leave the drain valve(s) open until you are ready

to spray again.

If you suspect that the spray gun or hose is completely

clogged, or that pressure has not been fully relieved

after following the steps above,

very slowly loosen the

hose end coupling and relieve pressure gradually

, then

loosen completely

. Now clear the valve or hose.

 

Service

Disconnecting the Hydraulic Motor

WARNING

reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 7.

Relieve the pressure

Disconnect the hydraulic hoses and plug all hy

draulic connections and hoses.

CAUTION

Keep the hydraulic system clean

Always plug the hydraulic inlets, outlets and lines

when disconnecting them for any reason to avoid

introducing dirt and other contaminants into the

system.

Remove the cotter pin (5), and unscrew the cou

pler (6) from the hydraulic motor displacement rod

(104). Remove the o–ring (7) from the coupler

See Fig. 1.

With the unit upright, remove the three bolts (1)

and the tie rods (2) holding the hydraulic motor

(101) to the pump (102). See Fig. 1.

Clean and inspect all parts. Replace parts as

necessary. T

o service the hydraulic motor (101),

refer to manual 308–618

Reconnecting the Hydraulic Motor

1. WIth

the unit upright, insert the three bolts (1)

through the hydraulic motor tie plate (103), the tie

rods (2), and into the pump tie plate (3). T

orque

the bolts to 20–30 ft-lb (27–40 N

m).

Lubricate, and place the o–ring (7) on the coupler

(6). Insert the coupler into the hydraulic motor

displacement rod (104), making sure that the holes

in both pieces are aligned. T

orque the coupler to

75–80 ft-lb (101–108 N



m). Insert the cotter pin

(5). See Fig. 1.

Unplug all hydraulic connections and hoses.

Reconnect the hydraulic hoses.

06170

Fig. 2

101

103

104

102

9308-674

Notes

10 308-674

Service

Disconnecting the Displacement Pump

CAUTION

When

servicing the left and center displacement

pumps (as viewed from the rear of the system), the

packings in both units must be replaced at the same

time, or uneven performance will result.

Flush the entire system.

NOTE:

Any residual paint may clog the system.

WARNING

o reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 7.

Relieve the pressure.

Disconnect the filter hose and the inlet hose.

CAUTION

Be sure

to support the displacement pump while it is

being disconnected, to prevent it from falling and

causing injury or property damage. Do this by se

curely bracing the pump, or by having one person

hold it while another disconnects it.

Using an adjustable wrench, remove the three

bolts (1) and the tie rods (2). Slide the

pump (102) down as far as possible.

With two adjustable wrenches, use one to hold the

coupler (6) to prevent it from turning, and the other

to disconnect the displacement rod (105). Carefully

remove the pump from the hydraulic

motor (101).

Unscrew the lower tie plate (3), and retaining nut

(4) from the displacement pump.

Refer to manual 308–650 for displacement pump

service.

Fig. 3

102

101

103

105



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