Graco Ratio King A Series Datasheet

307013
Rev. V
First choice when
quality counts.t
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
45:1 Ratio KingrPump
4050 psi (28 MPa, 279 bar) Maximum Working Pressure
90 psi (0.6 MPa, 6.2 bar) Maximum Air Input Pressure
Model 224434, Series A
Stubby Size, with Standard Air Motor and
Severe-Duty Displacement Pump*, with leather packings
*Severe-Duty Displacement Pumps have an abrasion
and corrosion-resistant displacement rod and sleeve.
Refer to the Technical Data in the separate displace-
ment pump manual 307728 for Wetted Parts informa-
tion.
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 1997, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
03290
Parts

2307013
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 14. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco 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
corresponding instructions.
WARNING
INJECTION HAZARD
Spray from the gun, hose leaks, or ruptured components can inject fluid into your body and cause an
extremely serious injury, including the need for amputation. Splashing fluid in the eyes or on the skin
can also cause a serious injury.
DFluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate medi-
cal attention.
DDo not point the spray gun/dispensing valve at anyone or at any part of the body.
DDo not put hand or fingers over the spray tip/nozzle.
DDo not stop or deflect fluid 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 spray gun/dispensing valve when spraying/
dispensing.
DBe sure the gun trigger safety operates before spraying.
DLock the gun/valve trigger safety when you stop spraying.
DFollow the Pressure Relief Procedure on page 7 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 the 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.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause a serious injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled.
DKnow the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
DStore hazardous fluid in an approved container. Dispose of the hazardous fluid according to all
local, state, and national guidelines.
DWear appropriate protective clothing, gloves, eyewear, and respirator.
Warnings are continued on the next page.

3307013
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and
result in fire or explosion and serious injury.
DGround the equipment and the object being sprayed/dispensed. See Grounding on page 4.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid being
sprayed.
DExtinguish all the open flames or pilot lights in the spray/dispensing area.
DElectrically disconnect all the equipment in the spray/dispensing area.
DKeep the spray/dispensing area free of debris, including solvent, rags, and gasoline.
DDo not turn on or off any light switch in the spray/dispensing area while operating or if fumes are
present.
DDo not smoke in the spray/dispensing area.
DDo not operate a gasoline engine in the spray/dispensing area.
DIf there is any static sparking while using the equipment, stop spraying/dispensing immediately.
Identify and correct the problem.
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result
in a serious injury.
DThis equipment is for professional use only.
DRead all the 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 the equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. This equip-
ment has a 4050 psi (28.3 MPa, 283 bar) maximum working pressure.
DUse fluids that are compatible with the equipment wetted parts. See the Technical Data section of
all the equipment manuals. Read the fluid manufacturer’s warnings.
DRoute the 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).
DDo not use the hoses to pull equipment.
DWear hearing protection when operating this equipment.
DComply with all applicable local, state, and national fire, electrical, and other safety regulations.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate fingers.
DDo not operate the equipment with the air motor plates removed.
DKeep clear of any moving parts when starting or operating the equipment.

4307013
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating, ground the system as
explained below. Also read the section
FIRE AND EXPLOSION HAZARD on
page 3.
To reduce the risk of static sparking, ground the pump
and all other components used or located in the spray/
dispensing area. Check your local electrical code for
detailed instructions for your area and type of equip-
ment and be sure to ground all of these components.
DPump: loosen the grounding lug locknut (W) and
washer (X). Insert one end of a 12 ga (1.5 mm2)
minimum ground wire (Y) into the slot in lug (Z) and
tighten the locknut securely. See Fig. 1. Connect
the other end of the wire to a true earth ground.
Order Part No. 237569 Ground Wire and Clamp.
DAir and Fluid Hoses: Use only electrically conduc-
tive hoses with a maximum of 500 feet (150 m)
combined hose length to ensure grounding continu-
ity.
DAir Compressor: follow the air compressor
manufacturer’s recommendations
DSpray gun/dispensing valve: obtain grounding
through connection to a properly grounded fluid
hose and pump.
DFluid supply container: according to local code.
DObject being sprayed: according to local code.
DAll solvent pails used when flushing, according to
local code. Use only metal pails, which are conduc-
tive. Do not place the pail on a non-conductive
surface, such as paper or cardboard, which inter-
rupts grounding continuity.
DTo maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the
gun firmly to the side of a grounded metal pail, then
trigger the gun.
Fig. 1
W
X
Y
Z
0864
Flushing Safety
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Before flushing, be sure the entire system and flushing
pails are properly grounded. Refer to Grounding at
left. Follow the Pressure Relief Procedure on page
7, and remove the spray tip/nozzle from the gun/dis-
pensing valve. Always use the lowest possible fluid
pressure, and maintain firm metal-to-metal contact
between the gun/dispensing valve and the pail during
flushing to reduce the risk of fluid injection injury, static
sparking, and splashing.

5307013
Installation
03291
Key
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
Y
Pump
Pump Runaway Valve
Air Line Lubricator
Bleed-Type Master Air Valve (required, for pump)
Pump Air Regulator
Air Line Filter
Bleed-Type Master Air Valve (for accessories)
Air Supply Hose
Fluid Drain Valve (required)
Fluid Supply Hose
Spray Gun
Fluid Suction Hose
Exhaust Port for Muffler (1–1/4”npt)
16 Exhaust Holes
Wall Bracket
Packing Nut/Wet-Cup
Ground Wire (required)
Typical Installation
J
A
B
C
D
E
F
G
H
K
L
M
N
Y
P
(PLUG WHEN EXHAUSTING
THROUGH MUFFLER)
R
S

6307013
Installation
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and the
parts drawing.
NOTE: Accessories are available from your Graco
distributor. If you supply your own accessories, be sure
the are adequately sized and pressure-rated to meet
the system’s requirements.
The Typical Installation shown on page 5 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.
System Accessories
Refer to the Typical Installation on page 5.
WARNING
Two accessories are required in your system: a
bleed-type master air valve (D) and a fluid drain
valve (J). These accessories help reduce the risk
of serious injury including 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.
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.
Mounting Accessories
Mount the pump (A) to suit the type of installation
planned. The pump dimensions and mounting hole
layout are shown on page 14. Use 3/8 in. bolts, lock-
washers, and nuts to attach the pump firmly to the
mounting.
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. Fluid hoses must have
spring guards on both ends.
Connect a electrically conductive fluid hose (H) to the
pump’s 1”npt(f) fluid outlet, using a suitable adapter.
Connect a fluid suction hose and tube (M) to the
pump’s 1–1/2”npt(f) fluid intake.
Use an electrically conductive 3/4 in. ID (minimum) air
hose (H) to supply air to the pump.
Air Line Accessories
Install the following accessories in the order shown in
the Typical Installation, using adapters as necessary:
DAn air line lubricator (C) provides automatic air
motor lubrication.
DA bleed-type master air valve (D) is required in
your system to relieve air trapped between it and
the motor when the valve is closed (see the WARN-
ING at left). Be sure the bleed valve is easily ac-
cessible from the pump, and is located downstream
from the air regulator.
DA pump runaway valve (B) senses when the
pump is running too fast and automatically shuts off
the air to the motor. A pump which runs too fast can
be seriously damaged. Install closest to the pump
air inlet.
DAn air 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.
DAn air line filter (F) removes harmful dirt and
moisture from the compressed air supply.
DA second 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 order shown in
the Typical Installation, using adapters as necessary:
DA fluid drain valve (J) is required in your system
to relieve fluid pressure in the hose and gun (see
the WARNING at left).
DA spray gun (L) dispenses the fluid. The gun
shown in the Typical Installation is an airless spray
gun.
Air Motor Exhaust
To route the air motor exhaust outside, remove the
exhaust port plug and connect the hose to the 1–1/4
npt(f) exhaust port (N). Plug the 16 exhaust holes in
the base of the motor with 1/4 in. size x 1/2 in. long
self-tapping screws.

7307013
Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in-
jected 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 any part of the system.
1. Lock the spray gun/dispensing valve trigger safety.
2. Shut off the air to the pump.
3. Close the bleed-type master air valve (required in
your system).
4. Unlock the trigger safety.
5. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve
to relieve pressure.
6. Lock the trigger safety.
7. Open the drain valve (required in your system),
having 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/nozzle is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly loosen the
retaining nut or hose end coupling and relieve pressure
gradually, then loosen completely. Now clear the
tip/nozzle or hose.

8307013
Operation
WARNING
Moving parts can pinch or amputate your fingers or
other body parts. When air is supplied to the motor,
the air motor piston (located behind the air motor
shield) moves. Therefore, never operate the pump
with the ar motor shield removed.
Flush the Pump Before Using
The pump is tested with lightweight motor oil, which is
left in to protect the pump parts. If the fluid you are
pumping may be contaminated by the oil, flush out the
oil 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 thor-
oughly flushed.
WARNING
For your safety, read the warning section, FIRE
AND EXPLOSION HAZARD on page 3 before
flushing, and follow all instructions given there.
Starting and Adjusting 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.
See the Typical Installation on page 5. Be sure the air
regulator (E) and bleed-type master air valve (D) are
closed. Do not install the spray tip yet.
Connect a suction hose (M) to the pump’s fluid inlet.
Hold a metal part of the spray gun (L) firmly to the side
of a grounded metal pail and hold the trigger open.
Then open the pump’s bleed-type master air valve (D).
Now slowly open the air regulator until the pump starts,
about 20 psi (140 kPa, 1.4 bar).
Cycle the pump slowly until all the air is pushed out,
and fluid is flowing from the gun in a steady stream.
Release the spray gun trigger and lock the trigger
safety. The pump should stall against pressure when
the trigger is released.
Relieve the pressure, then install the spray tip in the
gun.
In a direct supply system, with the pump and lines
primed and with adequate air pressure and volume
supplied, the pump will start and stop as the spray gun
is opened and closed. In a circulating system, the
pump will run continuously and will speed up or slow
down as supply demands until the air supply is shut
off.
Use an adequately sized air regulator (E) to control the
pump speed and the fluid pressure. Always use the
lowest air pressure necessary to get the desired
results. Higher pressures waste fluid and cause pre-
mature wear of the pump packings and spray tip.
Keep the packing nut/wet-cup (S) half filled with Graco
Throat Seal Liquid (TSL) or compatible solvent, to help
prolong the packing life. Adjust the packing nut weekly
with the wrench (supplied) so it is just tight enough to
prevent leakage; do not overtighten. Always relieve
the pressure before adjusting the packing nut.
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. A pump runaway
valve (B), which shuts off the air supply to the pump if
the pump accelerates beyond the pre-set speed, is
available. See the Typical Installation on page 5. If
your pump accelerates quickly, or is running too fast,
stop it immediately and check the fluid supply. If the
supply container 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
For overnight shutdown, relieve the pressure. 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. Never leave water or water-based
fluid in the pump overnight. First, flush with water or a
compatible solvent, then with mineral spirits. Relieve
the pressure, but leave the mineral spirits in the pump
to protect the parts from corrosion.
Check Valve Adjustment
Refer to the separate displacement pump manual
307728 for check valve adjustment information.

9307013
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Before servicing this equipment always make sure to
Relieve the Pressure.
Note: Check all possible causes and solutions before
disassembling the pump.
Problem Cause Solution
Pump fails to operate Restricted line or inadequate air supply Clear; increase air supply.
Obstructed fluid hose, gun, or dispensing
valve Open, clear.*
Exhausted fluid supply Refill; Purge all air from pump and fluid
lines.
Fluid dried on displacement rod Clean; always stop pump at bottom of
stroke; keep wet-cup 1/2 filled with com-
patible solvent.
Damaged air motor Service air motor (see manual 306968).
Pump operates but output low on both Restricted line or inadequate air supply Clear; increase air supply.
strokes Obstructed fluid hose, gun, or dispensing
valve Open, clear.*
Exhausted fluid supply Refill; purge all air from pump and fluid
lines.
Air in displacement pump and hose Reprime.
Check valves need adjustment Adjust (see manual 307728).
Packing nut too tight or too loose Adjust (see manual 307728).
Worn throat packings Replace (see manual 307728).
Pump operates but output low on
down stroke Held open or worn intake valve Clear; service (see manual 307728).
Pump operates but output low on up
stroke Held open or worn fluid piston valve or packings Clear, service (see manual 307728).
Erratic or accelerated operation Exhausted fluid supply Refill; purge all air from pump and fluid
lines.
Packing nut too tight Adjust (see manual 307728).
Check valves need adjustment Adjust (see manual 307728).
Held open or worn intake valve Clear; service (see manual 307728).
Held open or worn fluid piston valve or
packings Clear; service (see manual 307728).
* To determine if the fluid hose or gun/valve is obstructed, relieve the pressure. 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 20–40 psi [140–280 kPa, 1.4–2.8
bar]). If the pump starts when the air is turned on, the obstruction is in the fluid hose gun/valve.

10 307013
Service
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Disconnecting the Displacement Pump
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure.
2. Disconnect the air and fluid hoses. Remove the
pump from its mounting. Note the relative position
of the pump’s fluid outlet (A) to the air motor’s air
inlet (B). See Fig. 2.
3. Screw the coupling nut (32) off of the air motor
piston rod. Be careful not to lose the two couplers
(33) as you lower the nut. Unscrew the tie rod
locknuts (26) from the tie rods (31). Carefully pull
the displacement pump (2) away from the air
motor (1).
4. Refer to the instruction manual 307728 (supplied)
for displacement pump service instructions.
5. Refer to instruction manual 306968 (supplied) for
air motor service instructions.
Reconnecting the Displacement Pump
1. Orient the pump’s fluid outlet (A) to the air motor’s
air inlet (B) as was noted in step 2 under Discon-
necting the Displacement Pump. Position the
displacement pump (2) on the tie rods (31).
2. Place the coupling nut (32) on the connecting rod
(T). Insert the couplers (33) into the coupling nut
from the top. Screw the coupling nut (32) onto the
air motor piston rod. Screw the locknuts (26) onto
the tie rods (31) loosely.
3. Mount the pump and reconnect all hoses. Recon-
nect the ground wire if it was disconnected during
repair.
4. Tighten the tie rod locknuts (109) evenly, and
torque to 40–50 ft-lb (54–68 NSm).
5. Tighten the packing nut/wet-cup (S) with the
wrench (28) supplied, so it is just snug - no tighter.
Fill the wet-cup 1/2 full with Graco Throat Seal
Liquid (TSL) or compatible solvent. Start the pump
and run it slowly at about 20 psi (140 kPa, 1.4 bar)
air pressure, to check that it is operating properly.