Graco HYDRA-SPRAY President A Series Operation manual

Instructions–Parts List
307619ZAA
ENG
HYDRA–SPRAYR
Monarkrand Presidentr
Pumps
For airless and air–assisted spraying of finishing materials.
For professional use only.
Important Safety Instructions
Read all warnings and instructions in this manual. Save
these instructions.
See page 2 for Table of Contents
Part No. 223596, Series B 23:1 Ratio MonarkrPump
with Part No. 223595 carbon steel severe–duty displacement pump*
with stainless steel glands, intake housing, piston valve, and ball stop
2760 psi (19 MPa, 190 bar) Maximum Fluid Working Pressure
120 psi (0.8 MPa, 8 bar) Maximum Air Input Pressure
Part No. 237958, Series B 23:1 Ratio MonarkrPump
with Part No. 239145 stainless steel
severe–duty displacement pump*
3450 psi (24 MPa, 238 bar) Maximum Fluid Working Pressure
150 psi (1.0 MPa, 10.4 bar) Maximum Air Input Pressure
Part No. 239140, Series A 46:1 Ratio PresidentrPump
with Part No. 239145 stainless steel
severe–duty displacement pump*
4600 psi (32 MPa, 317 bar) Maximum Fluid Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Input Pressure
* Severe–duty displacement pumps have abrasion–resistant
displacement rods and sleeves. Refer to Technical Data on
page 20 for information on the wetted parts.
Model 239140
06936
Model 223596 02097
II 1/2 G T3
ITS03ATEX11228
II 1/2 G T3
ITS03ATEX11228
II 2 G T6

2 307619
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service
Disconnecting the Displacement Pump 11. . . . . . . .
Reconnecting the Displacement Pump 11. . . . . . . .
Displacement Pump Service 12. . . . . . . . . . . . . . . . .
Parts 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conversion Kits 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 19. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 24. . . . . . . . . . . . . . . . . . . . . .
Graco Information 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. Refer to the
Technical Data on page 20 for the maximum working pressure of this equipment.
DUse 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.
DDo not use hoses to pull equipment.
DRoute 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).
DWear hearing protection when operating this equipment.
DDo not lift pressurized equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.

307619 3
WARNING
SKIN INJECTION HAZARD
Spray from the gun, hose 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.
DFluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
DDo not point the gun at anyone or at any part of the body.
DDo not put your hand or fingers over the spray tip.
DDo not stop or deflect leaks with your hand, body, glove or rag.
DDo not “blow back” fluid; this is not an air spray system.
DAlways have the tip guard and the trigger guard on the gun when spraying.
DCheck the gun diffuser operation weekly. Refer to the gun manual.
DBe sure the gun trigger safety operates before spraying.
DLock the gun trigger safety when you stop spraying.
DFollow the Pressure Relief Procedure on page 8 whenever you: are instructed to relieve pres-
sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
DUse only Graco approved hoses. Do not remove any spring guard that is used to help protect the
hose from rupture caused by kinks or bends near the couplings.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate your fingers.
DKeep clear of all moving parts when starting or operating the pump.
DBefore servicing the equipment, follow the Pressure Relief Procedure on page 8 to prevent the
equipment from starting unexpectedly.

4 307619
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.
DGround the equipment and the object being sprayed. Refer to Grounding on page 5.
DIf 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.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
DKeep the spray area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all equipment in the spray area.
DExtinguish all open flames or pilot lights in the spray area.
DDo not smoke in the spray area.
DDo not turn on or off any light switch in the spray area while operating or if fumes are present.
DDo 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.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
DAlways wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.

307619 5
Installation
NOTES:
DReference numbers and letters in parentheses in
the text refer to the callouts in the figures and
drawings.
DAlways use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply
your own accessories, be sure they are adequately
sized and pressure-rated to meet the system’s
requirements.
DFig. 2 is only a guide for selecting and installing
system 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, efficient 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
equipment.
Prepare the Site
Ensure that you have an adequate compressed air
supply. Refer to the performance charts on pages 21
and 23 to find the air consumption of your sprayer.
Mount the pump (A) to suit the type of installation
planned. The pump dimensions and mounting hole
layout are shown on page 19.
Keep the site clear of any obstacles or debris that
could interfere with the operator’s movement.
Have a grounded, metal pail available for use when
flushing the system.
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 4.
DPump: Use a ground wire and clamp. See Fig.1.
Loosen the grounding lug locknut (W) and washer
(X). Insert one end of a 12 ga (1.5 mm@) minimum
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. For a ground wire and
clamp, order Part No. 237569.
W
Y
X
Z
0720
Fig. 1
DAir and fluid hoses: Use only electrically conductive
hoses with 500 ft (150 m) maximum combined hose
length to ensure grounding continuity.
DAir compressor: Follow manufacturer’s
recommendations.
DSpray gun or dispensing valve: Connect to a
properly grounded fluid hose and pump.
DObject being sprayed: Follow your local code.
DFluid supply container: Follow your local code.
DSolvent 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.
DTo 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.

6 307619
Installation
Typical Installation
Fig. 2
KEY
APump
BWall bracket
CAir line lubricator
DBleed-type master air valve (required for pump)
See Warning on page 7 for part number.
EPump air regulator
FAir line filter
GBleed-type master air valve (for accessories)
HElectrically conductive air supply hose
JFluid drain valve (required)
See Warning on page 7 for part numbers.
KFluid filter
LElectrically conductive fluid supply hose
MSpray gun
NFluid suction hose
PAir Line Moisture Trap and Drain Valve
YGround wire (required)
Part No. 237569. See page 5 for installation instructions.
J
A
CDE
FG
H
K
L
M
N
Y
B
02098
P

307619 7
Installation
System Accessories
WARNING
A bleed-type master air valve (D) and a fluid drain
valve (J) are required in your system. These
accessories help reduce the risk of serious injury
including skin injection, splashing 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 off. Trapped air can cause the pump to cycle
unexpectedly. Locate the valve close to the pump.
Order Part No. 113333.
The fluid drain valve assists in relieving fluid pres-
sure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient. Order one of the following:
Part No. Description
238635 1/4 npt (mbe), carbon steel
210657 1/4 npt (mbe), carbon steel
210658 3/8 npt (mbe), carbon steel
210659 1/4 npt x 3/8 npt (mbe), carbon steel
239018 1/4 npt (mbe), stainless steel
235992 1/4 npt x 3/8 npt (mbe), stainless steel
Air and Fluid Hoses
Be sure all air and fluid hoses are properly sized and
pressure-rated for your system. Use only electrically
conductive air and fluid hoses. Use a 1/2 in. (13 mm)
I.D. (minimum) air hose (H) to supply air to the pump.
Fluid hoses must have spring guards on both ends.
Connect a fluid hose (L) to the pump’s 3/8 npt(f) fluid
outlet. Use of a short whip hose between the main
fluid hose and the gun (M) allows freer gun movement.
Connect a fluid suction hose or tube (N) to the pump’s
3/4 npt(m) fluid intake.
Air Line Accessories
Install the following accessories in the order shown in
Fig. 2, using adapters as necessary:
DAir line lubricator (C)
Provides automatic air motor lubrication.
DBleed-type master air valve (D)
Required in your system to relieve air trapped
between it and the air motor when the valve is
closed (see the WARNING at left). Be sure the
bleed valve is easily accessible from the pump, and
is located downstream from the air regulator (E).
DAir regulator (E)
Controls pump speed and outlet pressure by
adjusting the air pressure to the pump. Locate the
regulator close to the pump, but upstream from the
bleed-type master air valve (D).
DAir line filter (F)
Install an air line filter (F) and a moisture trap and
drain valve (P) to help remove moisture and
contaminants from the compressed air supply.
DSecond bleed-type air valve (G)
Isolates the air line accessories for servicing.
Locate upstream from all other air line accessories.
Fluid Line Accessories
Install the following accessories in the positions shown
in Fig. 2, using adapters as necessary:
DFluid drain valve (J)
Required in your system to relieve fluid pressure in
the hose and gun (see the WARNING at left).
Install the drain valve so that it points down and the
handle points up when it is opened.
DFluid filter (K)
Filters harmful particles from the fluid.
DSpray gun (M)
Dispenses the fluid. The gun shown in Fig. 2 is an
airless spray gun.

8 307619
Operation
Pressure Relief Procedure
WARNING
SKIN 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:
Dare instructed to relieve the pressure,
Dstop spraying,
Dcheck or service any of the system equipment,
Dor install or clean the spray tip.
1. Lock the gun trigger safety.
2. Shut off the air supply to the pump.
3. Close the bleed-type master air valve (required in
your system).
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
pressure gradually, then loosen it completely. Then
clear the tip or hose.
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 before using the pump. If the pump
is being used to supply a circulating system, allow the
solvent to circulate until the pump is thoroughly
flushed. See Flushing the Pump on page 9.
Packing Nut/Wet-Cup
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
Keep the packing nut/wet-cup (104) filled with Graco
Throat Seal Liquid (TSL) or compatible solvent to help
prolong the packing life. Ensure weekly that the
packing nut is torqued to 18 to 20 ft-lb (24 to 27 N.m);
do not overtighten it. See Fig. 3 on page 11. Relieve
the pressure before adjusting the packing nut or
adding TSL.
Starting and Adjusting the Pump
Begin these steps before you install the spray tip.
1. Ensure that the air regulator (E) and bleed-type
master air valve (D) are closed. See Fig. 2 on
page 6.
2. Connect a suction hose (N) to the pump’s fluid
inlet, or lower the pump into a fluid supply
container.
3. Hold a metal part of the spray gun (M) firmly to the
side of a grounded metal pail and hold the trigger
open.
4. Open the pump’s bleed-type master air valve (D).
5. Slowly open the air regulator (E) until the pump
starts (approximately 40 psi [0.28 MPa, 2.8 bar]).
6. Cycle the pump slowly until all the air is pushed
out and the pump and hoses are fully primed.
7. Release the spray gun trigger and lock the trigger
safety. The pump should stall against pressure
when you release the trigger.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
8. Relieve the pressure.
9. Install the spray tip in the gun.
Continued on page 9.

307619 9
Operation
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of overpressurizing
your system, which could cause
component rupture and serious injury,
never exceed the specified maximum air input
pressure to the pump (see Technical Data on
page 20).
10. Control the pump speed and fluid pressure with
the air regulator (E). Always use the lowest air
pressure necessary to get the desired results.
Higher pressure causes premature spray tip and
pump wear.
11. With the pump and lines primed, and with
adequate air pressure and volume supplied, the
pump starts and stops as the spray gun is opened
and closed. In a circulating system, the pump runs
continuously and speeds up or slows down as
supply increases or decreases until the air supply
is shut off.
CAUTION
Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed, possibly damaging itself. If your pump accel-
erates quickly, or is running too fast, stop it immedi-
ately and check the fluid supply. If the supply con-
tainer is empty and air has been pumped into the
lines, refill the container and prime the pump and the
lines with fluid, or flush and leave it filled with a
compatible solvent. Be sure to eliminate all air from
the fluid system.
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, relieve the pressure,and
always stop the pump at the bottom of the stroke to
prevent the fluid from drying on the exposed
displacement rod and damaging the throat packings.
Always flush the pump before the fluid dries on the
displacement rod. See Flushing the Pump.
Flushing the Pump
WARNING
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.
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.
Always flush the pump before fluid dries on the
displacement rod.
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
To 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. Remove the spray tip from the gun.
3. Hold a metal part of the gun firmly to the side of a
grounded metal pail.
4. Start the pump. Always use the lowest possible
fluid pressure when flushing.
5. Trigger the gun.
6. Flush the system until clear solvent flows from the
gun.
7. Relieve the pressure.

10 307619
Troubleshooting
WARNING
To 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. Check all possible problems and solutions before
disassembling pump.
Problem Cause Solution
Pump fails to operate. Restricted line or inadequate air
supply. Clear; increase air supply.
Insufficient air pressure; closed or
clogged air valves, etc. Open; clean (be sure to use air filter).
Exhausted fluid supply. Refill; purge all air from pump and
fluid lines.
Damaged air valve; stalling. Service air motor (see air motor
manual, supplied).
Dried fluid seizure of displacement
rod (103). Clean, check or replace throat pack- ings (114, 123); always stop pump at
bottom of stroke and keep wet-cup
filled with compatible solvent.
Pump operates but output is low on
both strokes. Restricted line or inadequate air supply. Clear; increase air supply.
Insufficient air pressure; closed or
clogged air valves, etc. Open; clean (be sure to use air filter).
Exhausted fluid supply. Refill; purge all air from pump and
fluid lines.
Clogged fluid line, valves, etc. Clear* (be sure to use fluid filter).
Packing nut (104) is too tight. Loosen (see page 8).
Loose packing nut (104) or worn
throat packings (114, 123). Tighten packing nut (see page 8); replace throat packings.
Pump operates but output is low on
downstroke. Held open or worn intake valve. Clear; service. See page 12.
Pump operates but output is low on
upstroke. Held open or worn fluid piston valve or packings (115, 124). Clear; service. See page 12.
Erratic or accelerated operation. Exhausted fluid supply. Refill; purge all air from pump and
fluid lines.
Held open or worn intake valve. Clear; service. See page 12.
Held open or worn fluid piston valve
or packings (115, 124). Clear; service. See page 12.
* To determine if the fluid hose or gun is obstructed, relieve the pressure and disconnect the fluid hose, and place
a container at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump (about 20 to
40 psi [0.14 to 0.28 MPa, 1.4 to 2.8 bar]). If the pump starts when the air is turned on, the obstruction is in the
fluid hose or gun.