Graco Series B Operation manual

307–745
Rev. F
Supersedes Rev. A,
PCN C, and includes
changes thru Rev
. E
First choice when
quality counts. 
04281A
Model 230–992
Shown
∗
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
55 GALLON SUPPLY PUMPS
3:1 President

, 4:1 President

, and
2:1 Monark

WITH DRUM COVER AND AGIT ATOR
Model 220–575, Series B
with 3:1 Ratio President Pump
500 psi (3.5 MPa, 35 bar) MAXIMUM FLUID
WORKING PRESSURE
∗ Model 230–992, Series C
with 4:1 Ratio President Pump
400 psi (2.8 MPa, 28 bar)
MAXIMUM FLUID
WORKING PRESSURE
Model 230–993, Series C
with 2:1 Ratio Monark Pump
200 psi (1.4 MPa, 14.0 bar)
MAXIMUM FLUID
WORKING PRESSURE
Refer to page 2 for
T able of Contents.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
Graco Inc. is registered to I.S. EN ISO 9001

2 307–745
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup
Grounding 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Positioning the Unit 5. . . . . . . . . . . . . . . . . . . . . . . . . .
System Accessories 5. . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Unit and Accessories 6. . . . . . . . . .
Operation
Pressure
Relief Procedure 7. . . . . . . . . . . . . . . . . . . .
Flushing 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting the Unit 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting and Adjusting the Pump 8. . . . . . . . . . . . . .
Shutdown and Care of the Pump 9. . . . . . . . . . . . . .
Parts Drawing 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 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
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 and accessories.
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. See Tech-
nical Data on page 15 for the maximum working pressure of this equipment.
D Use fluids and solvents that are compatible with the equipment wetted parts. Refer to the Techni-
cal 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 180 _F (82_ C) or below –40 _F (–40_C).
DW
ear hearing protection when operating this equipment.
D Do not lift pressurized equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.

307–745 3
WARNING
MOVING P ARTS HAZARD
The air motor piston can pinch or amputate your fingers.
 The rotating blades of the agitator can pinch or amputate your fingers or other body parts and can
cause splashing in the eyes or on the skin.
 Always shut of f the agitator and disconnect the air line before adjusting the angle of the agitator ,
removing the agitator from the drum, or checking or repairing any part of the agitator .
 Keep clear of all moving parts when starting or operating the equipment.
 Before servicing the equipment, follow the Pressure Relief Procedure on page 7 to prevent the
equipment from starting unexpectedly .

4 307–745
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
.

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.
 Electrically disconnect all equipment in the spray area.
 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 switches in the spray area while operating or 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 .

307–745 5
Setup
NOTES:

Reference numbers and letters in parentheses in
the text refer to the callouts in the figures and the
parts drawing.
 Accessories are available from your Graco
representative. If you supply your own
accessories, be sure they are adequately sized and
pressure-rated to meet the system’s requirements.
Grounding
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below . Also read
the section FIRE AND EXPLOSION
HAZARD on page 4.
WARNING
Proper grounding is an essential part of maintaining a
safe system.
T o reduce the risk of static sparking, the mounting
cover and all electrically conductive objects or devices
in the spray area must be properly grounded. Check
your local electrical code for detailed grounding
instructions for your area and type of equipment.
Agitator and drum cover: Connect one end of the
ground wire (Y) to the ground connector (X) on the rim
of the drum cover . See Fig. 1. Connect the other end
of the ground wire to a true earth ground. See the
pump instruction manual (307–986 for 230–992,
307–985 for model 230–993, or 308–793 for model
220–575) for instructions on grounding the pump.
Y
Fig. 1
X
Air and fluid hoses: Use only electrically conductive
hoses with 500 ft. (150 m) maximum combined hose
length to ensure grounding continuity .
Air compressor: Follow manufacturer ’s
recommendations.
Spray gun or dispensing valve: Ground through
connection to a properly grounded fluid hose and
pump.
Object being sprayed: Follow your local code.
Fluid supply container: 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 continuity .
T o maintain proper grounding continuity when flushing
or relieving pressure, always hold the metal part of the
spray gun firmly to the side of a grounded metal pail,
then trigger the gun.
Positioning the Unit
Select a convenient location for the unit. The air
valves for the pump (37) and agitator (5) must be fully
accessible.
System Accessories
A bleed-type master air valve (N) and a fluid drain
valve (K) are required in your system. These
accessories help reduce the risk of serious injury ,
including splashing of fluid in the eyes or on the
skin, and injury from moving parts if you are adjust -
ing or repairing the pump or agitator .
The bleed-type master air valve relieves air
trapped between this valve and the pump after the
air is shut of f. T rapped air can cause the pump to
cycle unexpectedly . Locate the valve close to the
pump. A red–handled bleed–type ball valve is
supplied to relieve air trapped in the air motor .
The fluid drain valve assists in relieving fluid pres -
sure in the displacement pump, hose, and gun.
T riggering the gun to relieve pressure may not be
suf ficient. Order Part No. 210–071.
WARNING

6 307–745
Setup
The installation shown in Fig. 2 is only a guide for selecting and installing system components and accessories.
Contact your Graco representative for assistance in designing a system to suit your particular needs.
Connecting the Unit and Accessories
Ground the unit as described in Grounding on
page 5.
 The main air supply must include a bleed-type
master air valve (N) for shutting of f air pressure to
the unit (supplied with Model 230–992).
 Connect a grounded air supply hose to the bleed
type pump air valve (N).
 The fluid line must include a fluid drain valve (K),
which helps relieve fluid pressure in the hose and
gun.
Y
ou should install an air line filter (J) to remove dirt
and moisture from the air supply .

Downstream from the air filter , you should install an
air line lubricator (H) for automatic air motor
lubrication.
KEY
AAir
Filter/Regulator to Gun
B Fluid Pressure Regulator
C Fluid Shutof f V alve
D
Fluid Filter
E Surge T ank
F
Bleed–type Master Air V alve
G
Pump Ground Wire
H Air Line Lubricator
J Air Filter to Pump
K Drain V alve
L
Air Spray Circulating Gun
M Back Pressure V alve
(same as 203 except customer supplied)
N Bleed–type Pump Air V alve
Y
Drum Cover/Agitator Ground Wire
3 Agitator
201 Air Supply Hose
203 Back Pressure V alve
204
Air Regulator
206a Return Fluid Hose
206b Supply Fluid Hose
D
Fig. 2
04283A
201
A
E
B
C
FG
HK
LM
J
MAIN AIR SUPPLY LINE
FLUID SUPPLY LINE
SECONDARY FLUID RETURN
MAIN FLUID RETURN
203
204 206a
206b
3
N
Y

307–745 7
Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or spraying acci -
dentally. T
o reduce the risk of an injury from acci -
dental spray from the gun, splashing fluid, or
moving parts, follow the Pressure Relief Proce -
dure
whenever you:
 are instructed to relieve the pressure,
 stop spraying,
 check or service any of the system equipment,
 or install or clean the spray nozzle.
1. Lock the gun trigger safety .
2.
Shut of f the air supply to the pump.
3. Close the bleed-type master air valve (required in
your system). On Model 230–992, this is the
red–handled ball valve, assembled next to the air
regulator.
4.
Unlock the gun trigger safety .
5.
Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
6.
Lock the gun trigger safety .
7.
Open the drain valve (required in your system),
and have a container ready to catch the drainage.
8. Leave the drain 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, very slowly loosen the
tip guard retaining nut or hose end coupling and relieve
the pressure gradually . Then loosen it completely .
Then clear the tip or hose.
Flushing
FIRE AND EXPLOSION HAZARD
Before flushing, read the section FIRE
AND EXPLOSION HAZARD on page
4. Be sure the entire system and
flushing pails are properly grounded.
Refer to
Grounding on page 5.
WARNING
Flush the pump before first use. The pump is
tested with lightweight oil, which is left in to protect the
pump parts. If the fluid you are using may be
contaminated by the oil, flush it out with a compatible
solvent.
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
T o clean any settled particles out of the system, flush
the entire system at least once each 90 days or less. If
possible, circulate the solvent and leave it in the lines
for two days, such as over the weekend, to help loosen
any dried paint.
1. Relieve the pressure.
2. Shutdown the system as explained in Shutdown
and Care of the Pump on page 9.
3. Start the pump and operate it at about 30 cycles
per minute.
4. Lubricate the agitator , if you haven’t already done
so, and then close its air valve to stop agitation.
WARNING
Failure to shut off the agitator before raising the
pump assembly may result in serious injury from
splashing paint in the eyes or contact with the
blades of the agitator .
5. Raise the pump out of the paint while it is still
running and let it run itself dry to force the paint
back into the drum. Shut of f the pump.
CAUTION
Never leave water or water-based fluid in the pump
overnight. Flush with a compatible solvent to protect
the parts from corrosion.
6. Remove the paint drum and place a 55 gallon
drum, containing enough solvent to thoroughly fill
and flush the system, under the pump. Lower the
pump.
7.
Start the pump again and allow the solvent to
circulate for at least one hour .

8 307–745
Operation
8. Shut of f the air to the pump, open the bleed–type
master air valve, and open the drain valve (K).
Leave the solvent in the system overnight or , if
possible, all weekend.
9. Start the pump and circulate it again for 30
minutes. Raise the pump out of the solvent and let
it dry to force out the solvent. Drain solvent from all
outlet loops and filters.
10. Place the paint supply drum under the pump,
agitate the paint, install the gun and hoses.
11. Reset the air and fluid pressure regulators to
complete the system flushing.
Adjusting the Unit
Install supply drum under cover/pump. Make sure that
the cover is supported by the drum.
Shortened or recycled drums may cause the pump
or agitator to bottom out in the drum, causing
damage. Contact your fluid supplier to order a
standard size drum.
CAUTION
1. Unscrew the filter bowl and remove the filter
screen. Replace the bowl. Flush the unit until
clear solvent comes from the gun, then reinstall
the filter screen.
2. Before operation, ensure that all fasteners and
tube connections are tightened securely .
Starting and Adjusting the Pump
1. Close the air regulator (204).
2. Start the agitator (3). Agitate the paint just fast
enough to keep all paint particles suspended.
Over–agitating causes air bubbles in the paint
which can cause poor gun performance and poor
surface finish.
3. Open the red–handled ball valve. Open the pump’ s
bleed-type master air valve (N).
4. Slowly open the air regulator until the pump starts.
Adjust it until the pump cycles slowly – about 50
cycles per minute.
5. When the paint returns through the return line in a
steady stream, turn on the air to one gun, open
both fluid shutof f valves (C) near the gun, and
adjust the fluid regulator (B). See the manuals
supplied with these components for pressure
range and adjustment . Repeat for all gun stations.
6. Paint line pressure is controlled by the back
pressure regulator (203). This regulator restricts
flow of paint in the line so there is suf ficient paint
pressure at all gun stations. T urn the regulator
handle clockwise to increase and
counter–clockwise to decrease pressure.
Adjust the regulator so there is about 10 psi
(0.6 bar) more fluid pressure at the regulator
than is required at the last gun in the line.
NOTE: As you increase fluid line pressure, you must
also increase air pressure to the pump, so the pump
can handle the heavier load. However , never increase
the pressure so much that you exceed the maximum
working pressure of any component in the system.
7. As you start to spray , adjust the air and fluid
pressures to the gun to obtain the best results.
CAUTION
Do not allow the pump to run dry . It will quickly
accelerate to a high speed, causing damage. If
your pump is running too fast, stop it immediately
and check the fluid supply . If the container is
empty and air has been pumped into the lines, refill
the container and prime the pump and the lines, or
flush and leave it filled with a compatible solvent.
Eliminate all air from the fluid system.
COMPONENT RUPTURE HAZARD
T o reduce the risk of overpressurizing
your system, which could cause compo -
nent rupture and serious injury , never
exceed the specified Maximum Incoming Air Pres -
sure to the pump. (see T echnical Data on
page 15.)
WARNING

307–745 9
Operation
Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Never allow paint to dry in the pump and lines.
To shutdown the system
1.
Relieve the pressure. Stop the agitator , and
lubricate it.
2. If using a Graco fluid pressure regulator at the
gun, reverse its regulating key and thread it into
the regulator cap as far as it will go.
3. Loosen the spray gun air cap about three turns,
hold a rag over the front of the air cap and fully
trigger the gun. This forces paint in the gun, hose
and regulator back into the circulating line. Close
the fluid shutof f valves (C) at that gun station,
Repeat for the other gun stations.
4. Open the bleed–type master air valve (N), and the
pump air regulator (204) to restart the pump.
Circulate the paint to remove all trapped air before
shutting down.
5. Disconnect the gun’ s fluid hose from the gun and
the fluid regulator . Plug the regulator outlet. Blow
compressed air and compatible solvent through
the hose to clean it. Clean the gun according to the
instructions supplied with it. Each month remove
and clean the fluid regulator .
6.
If you are not using an air line lubricator , manually
lubricate the motor at least once a day .
7.
Circulate the fluid in the lines often enough during
the shutdown to prevent the paint from drying.
NOTE: T o drain the circulating lines and flush the
system, see Flushing on page 7.

10 307–745
Parts Drawing
04282B
Fig. 3
1 or 5
2
3
204
203
201
202 207
206
6
Ref. No. 4
Hose & Regulator Kit
Includes items 201 to 207
(MONARK PUMP SHOWN)
205206
10
9
8
202
11
Model 230–993, Series B
2:1 Ratio Monark Carbon Steel
55 Gallon Drum System
Includes items 2 to 6, and 1 1
Model 230–992, Series B
4:1 Ratio President Carbon Steel
55 Gallon Drum System
Includes items 1 to 4, and 6 to 12
7
12