Graco President 224 757 User manual

308–159
Rev. C
Supersedes A
and PCN B

INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
STUBBY SIZE
4:1 Ratio President  Pump
400 psi (28 bar) Maximum Fluid Working Pressure
100 psi (7 bar) Maximum Air Input Pressure
Part No. 224–757, Series C
Carbon Steel, Leather Packed Pump
For Use in Lubrication Systems
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 14. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco W arranty 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Toll-Free Graco Phone Number 16. . . . . . . . . . . . . . . . .
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1992, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

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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.
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
T echnical Data on page 15 for the maximum working pressure of this equipment.
D 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.
D Do not use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in aluminum equipment. Such use could result in a serious chemical
reaction, with the possibility of explosion.
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).
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.

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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 lubricated. Refer to Grounding on page 5.
 If there is any static sparking or you feel an electric shock while using this equipment, stop dis-
pensing 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 dispensed.
 Keep the dispense area free of debris, including solvent, rags, and gasoline.
 Electrically disconnect all equipment in the dispense area.
 Extinguish all open flames or pilot lights in the dispense area.
 Do not smoke in the dispense area.
 Do not turn on or of f any light switch in the dispense area while operating or if fumes are present.
 Do not operate a gasoline engine in the dispense 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 .
MOVING P ARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate your fingers.
 Keep clear of all moving parts when starting or operating the pump.
 Before servicing the equipment, follow the Pressure Relief Procedure on page 8 to prevent the
equipment from starting unexpectedly .

4 308-159
Notes

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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 . If you
supply your own accessories, be sure they are ade -
quately sized and pressure rated for your system.
Fig. 2 is only a guide for selecting and installing sys -
tem components and accessories. Contact your Graco
distributor for assistance in designing a system to suit
your particular needs.
Prepare the Operator
All persons who operate the equipment must be
trained in the safe, ef ficient operation of all system
components as well as the proper handling of all fluids.
All operators must thoroughly read all instruction
manuals, tags, and labels before operating the equip -
ment.
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below . Also read
the section FIRE AND EXPLOSION
HAZARD on page 3.
1. Pump: order Part No. 237–569 Ground Wire and
Clamp. See Fig. 1. Loosen the grounding lug
locknut (W) and washer (X). Insert one end of the
ground wire (Y) into the slot in lug (Z) and tighten
the locknut securely . Connect the other end of the
wire to a true earth ground.
Fig. 1
WX
Y
Z
0864
2. Air and fluid hoses: use only electrically conductive
hoses.
3.
Air compressor: follow manufacturer ’ s recommen -
dations.
4.
Dispensing valve: ground through connection to a
properly grounded fluid hose and pump.
5. Fluid supply container: follow your local code.
6. Object being lubricated: follow your local code.
7. 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.
8.
T o maintain grounding continuity when flushing or
relieving pressure , hold a metal part of the dis -
pensing valve firmly to the side of a grounded
metal pail, then trigger the valve.
Mounting the Pump
Mount the pump to suit the type of installation planned.
The pump dimensions and mounting hole layout are
shown on page 14.
If the pump is immersed, be sure the pump intake is
1/2 in. (13 mm) of f the bottom of the fluid container .
If the pump is mounted on the wall or on a stand,
connect a suction line to the pump’ s 1–1/2” npt(f) fluid
inlet and place the other end of the line in the fluid
container.

6 308-159
Installation
Fig. 2
F
KEY
APump
BPump
Runaway V alve
C
Air Line Lubricator
DBleed-T ype Master Air V alve
(required, for pump)
E Air Regulator
F Air Line Filter
GBleed-T ype Master Air V alve
(for accessories)
H Fluid Drain V alve (required)
J Suction Kit
Y Ground Wire (required; see page
5 for installation instructions)
B
Y
CD A
E
G
H
J
MAIN
AIR LINE
FLUID SUPPL Y LINE
06113
1Fluid
outlet is actually on the
back side of the pump.
1

308-159 7
Installation
Available Accessories (must be
purchased separately)
Air Line Accessories
WARNING
A bleed-type master air valve (D) is required in
your system to 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
adjusting or repairing the pump.
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.
 The bleed-type master air valve (D) is required in
your system to relieve air trapped between it and
the air motor when the valve is closed (see the
WARNING above). Be sure the bleed valve is
easily accessible from the pump, and is located
downstream from the air regulator (E). Order Part
No. 1 13–269 Bleed V alve.
The
air regulator (E) controls pump speed and
outlet pressure by adjusting the air pressure to the
pump. Locate the pump air regulator upstream
from the pump’ s bleed-type master air valve (D).
The air filter (F) removes harmful dirt and moisture
from the compressed air supply .

A pump runaway valve (B) automatically shuts of f
the pump if it starts running too fast. A pump which
runs too fast can be seriously damaged.
 An air line lubricator (C) provides automatic air
motor lubrication. Install downstream from the
pump air regulator (E).
Install a second air bleed valve (G) upstream
from all other air line accessories, to isolate the
accessories for servicing.
Fluid Line Accessories
WARNING
A fluid drain valve (H) is required in your system to
help reduce the risk of serious injury , including
splashing of fluid in the eyes or on the skin.
The fluid drain valve assists in relieving fluid pres -
sure in the displacement pump, hose, and dis -
pense valve. T riggering the valve to relieve pres -
sure may not be suf ficient.
The fluid drain valve (H) is required in your sys -
tem to relieve fluid pressure in the hose and dis -
pense valve (see the WARNING above).
 Connect a suction tube kit (J) to the pump’ s
1–1/2” npt(f) fluid inlet.

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Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or dispensing
accidentally. T o reduce the risk of an injury from
accidental spray from the dispense valve, splash -
ing fluid, or moving parts, follow the Pressure
Relief Procedure whenever you:
 are instructed to relieve the pressure,
 stop dispensing,
 check or service any of the system equipment,
 or install or clean the nozzle.
1. Shut of f the air supply to the pump.
2. Close the bleed-type master air valve (D, required
in your system).
3. Hold a metal part of the dispensing valve (if used)
firmly to the side of a grounded metal pail, and
trigger the valve to relieve pressure.
4. Open the drain valve (H, required in your system),
having a container ready to catch the drainage.
5. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray nozzle or hose is com -
pletely 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
nozzle or hose.
Packing Nut
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure above.
Check the tightness of the packing nut/wet-cup (U)
periodically . The nut should be tight enough to prevent
leakage. T orque the nut to 20–24 ft-lb (27–33 N.m); do
not overtighten or you may damage the packings.
Relieve pressure before adjusting the nut. See Fig. 3.
If the pump is not immersed, fill the packing nut/wet-
cup 1/2 full with a compatible solvent. Keep the cup
filled at all times to help prevent the fluid you are
pumping from drying on the exposed displacement rod
and damaging the throat packings.
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. See Flushing on page 10.

Fig. 3
U
1Torque
to 20–24 ft-lb (27–33 N.m).
1

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Operation
Prime the Pump
1. See Fig. 2. Close all bleed-type air valves (D, G).
2. Close the pump air regulator (E).
3. Close the fluid drain valve (H).
4. Check that all fittings throughout the system are
tightened securely .
5.
Connect the air supply line to the pump air inlet.
6. Open the bleed-type air valves (D, G).
7. Hold a metal part of the dispense valve (if used)
firmly to the side of a grounded metal pail and hold
the trigger open.
8. Open the air regulator (E) until the pump starts.
Run the pump slowly until all air is pushed out and
the system is fully primed. Always use the lowest
pressure necessary to get the desired results.
Higher pressures cause premature pump wear .
9.
Release the dispense valve trigger and lock the
trigger safety .
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
10. Relieve the pressure. Install the nozzle in the
dispense valve, as explained in the dispense valve
manual.
WARNING
COMPONENT RUPTURE HAZARD
T o reduce the risk of overpressurizing
your system, which could cause compo -
nent rupture and serious injury , never
exceed 100 psi (7 bar) air supply pressure to the
pump.
11. Use the air regulator (E) to control pump outlet
pressure and pump speed. Always use the lowest
pressure necessary to get the desired results.
Higher pressure causes premature pump wear .
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 con -
tainer and prime the pump and the lines, or flush and
leave it filled with a compatible solvent. Eliminate all
air from the fluid system.

 
Maintenance
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 8.
For overnight shutdown, stop the pump at the bottom
of its stroke to prevent fluid from drying on the ex -
posed displacement rod and damaging the throat
packings. Relieve the pressure.
Always flush the pump before the fluid dries on the
displacement rod. See Flushing below .
Flushing
WARNING
FIRE AND EXPLOSION HAZARD
Before flushing, read the section FIRE
AND EXPLOSION HAZARD on page
3. Be sure the entire system and flush -
ing pails are properly grounded. Refer to
Grounding on page 5.
Flush the pump:
 Before the first use
 When changing fluids
 Before storing the pump.
Flush with a fluid that is compatible with the fluid you
are pumping and with the wetted parts in your system.
Check with your fluid manufacturer or supplier for
recommended flushing fluids and flushing frequency .
CAUTION
Never leave water or water-base fluid in the pump
overnight. If you are pumping water-base fluid, flush
with water first, then with a rust inhibitor such as
mineral spirits. Relieve the pressure, but leave the
rust inhibitor in the pump to protect the parts from
corrosion.
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
1. Relieve the pressure.
2. Hold a metal part of the dispense valve firmly to
the side of a grounded metal pail.
3. Start the pump. Always use the lowest possible
fluid pressure when flushing.
4. T rigger the dispense valve.
5. Flush the system until clear solvent flows from the
dispense valve.
6. Relieve the pressure.
Corrosion Protection for Carbon Steel
Pumps
CAUTION
Water, or even moist air , can cause your pump to
corrode. T o help prevent corrosion, never leave the
pump filled with water or air . Follow the instructions
under Flushing, at left.
Fluid Piston and Intake Valve Adjustment
The fluid piston and intake valves are factory set for
pumping medium viscosity fluids. See the separate
displacement pump manual, 307–983, for adjustment
procedures to pump lighter or heavier viscosity fluids.