Graco 237-004 Operation manual

306–694
Rev . W
Supersedes Rev U
and PCN W
First choice when
quality counts. 
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
HYDRA–SPRAY
30:1 RA TIO BULLDOG PUMP
3000 psi (21.0 MPa, 210 bar) MAXIMUM FLUID WORKING PRESSURE
100 psi (0.7 MPa, 7 bar) MAXIMUM AIR INPUT PRESSURE
Model 237–004, Series A
With Reduced Icing Quiet Air Motor and Severe–Duty Displacement Pump*
Model 221–068, Series A
With Quiet Air Motor and Severe–Duty Displacement Pump*
Model 217–579, Series B
With Standard Air Motor and Severe–Duty Displacement Pump*
Model 237–067, Series A
With Standard Air Motor and PTFE–Packed Displacement Pump
* Severe–Duty Displacement Pumps have an abra-
sion and corrosion–resistant displacement rod and
sleeve.
Refer to T echnical Data in manual 307–862
for W etted Parts information.
MODEL 217–579 SHOWN

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1997, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

306–694
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service
Troubleshooting
Chart 12. . . . . . . . . . . . . . . . . . . . . .
Disconnecting the Displacement Pump 13. . . . . . .
Reconnecting the Displacement Pump 13. . . . . . .
Parts Drawings and Lists
Model 237–004 14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 221–068 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 217–579 16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 237–067 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 18. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 20. . . . . . . . . . . . . . . . . . . . . . . . . .
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 .
 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 uncertain about usage, call your Graco
distributor.
 Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
 Check equipment daily . Repair or replace worn or damaged parts immediately .

Do not exceed the maximum working pressure of the lowest rated system component. This equip -
ment has a 3000 psi (21.0 MPa, 210 bar) maximum working pressure at 100 psi (0.7 MPa, 7
bar) maximum incoming air pressure .

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.
 Do not use hoses to pull equipment.
 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).
W
ear hearing protection when operating this equipment.
 Do not lift pressurized equipment.
 Comply with all applicable local, state, and national fire, electrical, and safety regulations.

3
306–694
WARNING
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 .

Fluid injected into the skin might look like just a cut, but it is a serious injury . Get immediate medi -
cal 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 8 whenever you: are instructed to relieve pres -
sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.
T ighten all fluid connections before operating the equipment.
 Check the hoses, tubes, and couplings daily . Replace worn, damaged, or loose parts immediately .
Permanently coupled hoses cannot be repaired; replace the entire hose.
 Use 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 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 .

4306–694
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 switch 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 .

5
306–694
Installation
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.
1. Pump: loosen the grounding lug locknut (W) and
washer (X). Insert one end of a 12 ga (1.5 mm
2)
minimum ground wire (Y) into the slot in lug (Z)
and lighten the locknut securely . See Fig. 1. Con -
nect the other end of the wire to a true earth
ground.
2.
Air and fluid hoses: use only grounded hoses with
a maximum of 500 ft (150 m) combined hose
length to ensure grounding continuity .
3.
Air compressor: follow manufacturer ’ s recommen -
dations.
4.
Spray gun: grounding is obtained through connec -
tion to a properly grounded fluid hose and pump.
5. Object being sprayed: according to your local
code.
6. Fluid supply container: according to your local
code.
7.
All solvent pails used when flushing, according to
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.
8. T o maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the
spray gun firmly to the side of a grounded metal
pail, then trigger the gun.
W
YX
Z
Fig. 1

6306–694
Installation
KEY
A
Pump Runaway V alve
B
Air Line Lubricator
CBleed–T ype Master Air V alve (required)
D
Pump Air Regulator
E Air Line Filter
F Check V alve
G
Fluid Drain V alve (required)
H
Surge T ank
J
Fluid Shutof f V alve
K
Fluid Pressure Regulator
L Spray Gun
M Back Pressure Regulator
N Director V alve
P
Fluid Suction Hose
Q Suction T ube
R
Packing Nut/W et–Cup
S
Drain Back T ube
T
Drain T ube
Y
Ground Wire (required)
J
ABC D
E
F
G
H
K
L
N
Y
R
S
C
J
Q
T
P
M
MAKE VERTICAL LOOP
MAIN AIR LINE
FLUID SUPPL Y LINE
FLUID RETURN LINE
1/2” (13 mm)
Typical Installation

7
306–694
Installation
NOTE: Reference numbers and letters in parentheses
in
the text refer to the callouts in the figures and
the parts drawing.
If you supply your own accessories, be sure they
are adequately sized and pressure–rated to
meet
the system’ s requirements.
The Typical Installation drawing on page 6 shows the
pump
being used for continuous duty over extra long cir -
culating lines with multiple spray outlets. This drawing is
only a guide for selecting and installing system compo-
nents and accessories. Contact your Graco distributor
for help in designing a system to suit your particular
needs.
SYSTEM
ACCESSORIES
Refer to the T ypical Installation drawing on page 6.
WARNING
T wo accessories are required in your system: a
bleed-type master air valve (C) and a fluid drain
valve (G). These accessories help reduce the risk
of serious injury including fluid 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 of f. T rapped 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.
T riggering the gun to relieve pressure may not be
sufficient.
Mounting the Pump
Refer to the Dimensions on page 18, and mount the
pump
to suit the type of installation planned. If you are us -
ing a wall bracket, be sure the wall is strong enough to
support the weight of the pump, bracket, accessories,
and
operating stress.
Air Line Accessories
Install the following accessories in the order shown in the
Typical Installation, using adapters as necessary:
A pump runaway valve (A ) senses when the pump
is running too fast and automatically shuts of f the air to
the motor . A pump which runs too fast can be serious -
ly
damaged. Install closest to the pump air inlet.
An air line lubricator (B) provides automatic air mo -
tor
lubrication.
A bleed–type master air valve (C) is 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.
An
air regulator (D) 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.
An air line filter (E) removes harmful dirt and mois-
ture
from the compressed air supply .
A second bleed–type air valve (C) isolates the air
line
accessories for servicing. Locate upstream from
all other air line accessories.
When dropping the air line down from the main air supply ,
always
install plumbing in a vertical loop as shown in the
Typical Installation.
Fluid Supply Line Accessories
Install the following accessories in the positions shown in
the T ypical Installation, using adapters as necessary:
A check valve (F) prevents backflow into the pump
when
the pump is shut of f.
A surge tank (H) with fluid filter reduces line pulsa-
tions
and filters the fluid.
A fluid drain valve (G) is required in your system to
relieve fluid pressure in the hose and gun (see the
WARNING
at left).
When dropping down to each gun station, install a
fluid shutoff valve (J) to isolate the station during
maintenance
and repair .
Install
a fluid pressure regulator (K) for precise con -
trol
of pressure to the gun (L).
Fluid Return Line Accessories
Install the following accessories in the positions shown in
the T ypical Installation, using adapters as necessary:
Install a back pressure regulator (M) after each gun
station to maintain constant back pressure in the sys -
tem.
Install a shutoff valve (J) after each back pressure
regulator to isolate the station for repair and mainte-
nance.
Pump Intake and Suction Line
In
a circulating system such as that shown in the T ypical
Installation,
remove the intake elbow (8) supplied with the
pump and replace it with an intake manifold. Install a di-
rector
valve (N) in the intake manifold. Connect the fluid
return line to the director valve. Connect a drain back
tube
(S) to the branch of the director valve.
Connect the suction hose (P) to the pump intake or the
intake manifold. The suction tube (Q) should rest 1/2 in.
(13 mm) of f the bottom of the supply container .

8306–694
Operation
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 tips.
1. Lock the gun trigger safety .
2.
Shut of f the air 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 you system),
having a grounded metal container ready to catch
the drainage.
8. Leave the drain valve open until you area 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 completely . Now clear
the tip or hose.

9
306–694
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 air motor shield removed.
Flush the Pump Before Using
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.
The pump is tested with lightweight 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 compat -
ible
solvent before using the pump. If the pump is being
used to supply a circulating system, allow the solvent to
circulate until the fluid lines are thoroughly flushed.
WARNING
For your safety , read the warning section, FIRE
AND EXPLOSION HAZARD on page 4 before
flushing, and follow all recommendations given
there.
Daily System Startup, Circulating Supply Systems
NOTE: Be sure the wet–cup is 1/2 full with Graco Throat
Seal Liquid or compatible solvent.
1. If you are using an agitator , turn it on and thor -
oughly mix the coating fluid.
2. Be sure the bleed–type master air valves (C), the
air regulator (D), and the fluid drain valves (G) are
closed, and the shutof f valves (J), fluid pressure
regulators (K), and back pressure regulators (M)
are open.
3. Place the suction tube (Q) in the fluid supply .
4. Open the bleed–type master air valves (C).
WARNING
T o reduce the risk of splashing and static sparking,
maintain firm metal-to-metal contact between the
gun and a grounded metal pail when priming the
pump.
5. If there IS solvent in the system:
a. T urn the director valve (N) to circulate.
b. Disconnect the return line from the director
valve,
and place it in a large waste container .
c. Open
the pump air regulator slowly, just until the
pump is running slowly and smoothly . W atch for
coating fluid to come from the return line, and
then
quickly shut of f the pump. Cap the hose end
with a high pressure plug or cap.
d. With no tip installed, unlock the gun trigger safe -
ty. Hold the trigger open and restart the pump.
Watch
for coating fluid to appear at the gun, and
then quickly release the trigger . Lock the gun
trigger
safety . Repeat for all gun stations.
e. Reinstall the return line.
6. If there IS NO solvent in the system:
a. T urn the director valve (N) to circulate.
b. With no tip installed, unlock the gun trigger safe -
ty. Trigger the gun into a container and
slowly
open the pump air regulator , just until the pump is
running slowly and smoothly . Allow the fluid to
purge
air from the gun line hose, then release the
trigger and lock the gun trigger safety . Repeat for
all gun stations.
c. Allow the pump to circulate fluid slowly and
purge
all air from the return line.

10 306–694
Operation
7. If the pump is hard to prime, follow steps 1 to 4.
Place a waste container under the fluid drain valve
and open the valve. Slowly open the air regulator .
Run the pump slowly until it primes. Shut of f the air
regulator; the pump will stall. Quickly close the
drain valve. Continue with step 5 or 6.
8. Relieve the pressure and install a spray tip and
tip guard.
9. Unlock the gun trigger safety , start the pump, and
spray a test pattern to check the atomization and
pattern. Relieve the pressure before making any
adjustments to the spray tip or system.
10. Adjust the fluid pressure regulator (K), back pres -
sure regulator (M), and pump air input pressure for
the best spraying combination and proper circula -
tion of the fluid. Record the regulator and air
pressure settings for future reference.
WARNING
T o reduce the risk of overpressurizing the pump,
which can cause a component to rupture and result
in serious injury , NEVER exceed 100 psi (0.7 MPa,
7 bar) MAXIMUM AIR PRESSURE to the pump.
Reduce the air pressure, which reduces the fluid
outlet pressure, if any fluid line accessory is not
rated to withstand the maximum working pressure
of this pump.
11. Adjust the air line lubricator (B) and pump runaway
valve (A). See the instructions supplied with them.
12. Lock the gun trigger safety whenever you stop
spraying, even for a moment. Always relieve the
pressure when shutting down for any period of
time.
13.
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 (A), which shuts of
f the air supply to
the pump if the pump accelerates beyond the
pre–set speed, is available. See the T ypical Instal -
lation on page 6. 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.

11
306–694
Maintenance
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.
Keep the packing nut/wet–cup (R) half filled with Graco
Throat Seal Liquid (TSL) or compatible solvent, to help
prolong
the packing life. Check the tightness of the pack -
ing nut weekly. Adjust the packing nut so it is just tight
enough to prevent leakage; do not overtighten. Always
relieve
the pressure before adjusting the packing nut.
Each day, check the lubricator and fill as needed, drain
the
air filter , and clean any fluid line filters. Always relieve
the
pressure first.
Check V alve Adjustment
To adjust the intake check valve, refer to the separate dis -
placement
pump manual 307–862.
Shutdown and Care of the Pump
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.
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 dis-
placement
rod. If you do not flush a circulating system ev -
ery
day , be sure the fluid is circulated frequently enough
to prevent fluid from drying or settling during shutdowns.
Never leave water or water–based fluid in the pump over -
night.
First flush with water or a compatible solvent, then
with mineral spirits. Relieve the pressure after flushing,
but leave the mineral spirits in the pump to protect parts
from corrosion.

12 306–694
Troubleshooting
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. Check all possible causes and problems before
disassembling the pump.
Pump fails to operate Restricted line or inadequate air supply Clear; increase air supply .
Obstructed fluid hose, gun, or Open, clear .*
dispensing valve
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 compatible solvent.
Damaged air motor Service air motor (see 307–049 or 307–304).
Pump operates but output Restricted line or inadequate air supply Clear; increase air supply .
low on both strokes
Obstructed fluid hose, gun, or Open, clear .*
dispensing valve
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 307–862).
Packing nut too tight or too loose
Adjust (see page 1 1).
W
orn throat packings Replace (see manual 307–862).
Pump operates but output Held open or worn intake valve Clear; service. See manual 307–862.
low on down stroke
Pump operates but output Held open or worn fluid piston valve Clear; service. See manual 307–862.
low on up stroke or packings
Erratic or accelerated Exhausted fluid supply Refill; purge all air from pump and fluid lines.
operation
Packing nut too tight Adjust (see page 1 1).
Check valves need adjustment Adjust (see manual 307–862).
Held open or worn intake valve Clear; service. See manual 307–862.
Held open or worn fluid piston valve Clear; service. See manual 307–862.
or packings
CAUSEPROBLEM SOLUTION
*To determine if the fluid hose or gun is obstructed, relieve the pressure . Disconnect the fluid hose and place a container at the
pump fluid outlet to catch any fluid. T urn 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 or gun.

13
306–694
Service
DISCONNECTING THE DISPLACEMENT PUMP
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. 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 to the air motor ’ s air inlet.
3. Remove the upper cotter pin (1) and unscrew the
coupling nut (10) from the air motor (16). Unscrew
the tie rod locknuts (3) from the tie rods (9). Care
-
fully pull the displacement pump (17) away from
the motor .
4.
Loosen the packing nut (R). Loosen the jam nut
(4). Remove the lower cotter pin (1) from the
displacement rod (U). Unscrew the connecting rod
(12) from the displacement rod (U) and from the
coupling (11). See Fig 2.
5. Refer to the separate manual 307–862 for dis -
placement pump service instructions.
6. Refer to the air motor instruction manual supplied
with your pump for air motor service instructions
(307–049 for Standard Bulldog Motors, and
307–304 for Quiet Bulldog Motors).
RECONNECTING THE DISPLACEMENT PUMP
1. Inspect the o–ring (7) on the connecting rod (12)
and replace if necessary . Lubricate the threads of
the connecting rod (12). Insert the coupling (1
1) in
the coupling nut (10) and screw the coupling onto
the connecting rod (12) so the holes in the cou
-
pling align with the top holes in the rod.
2. Screw the connecting rod (12) into the displace -
ment rod (U) until the holes in both parts are
aligned. Install the lower cotter pin (1). T ighten the
jam nut (4) down against the displacement rod (U).
See Fig 2.
3. Orient the pump’s fluid outlet to the air motor ’ s air
inlet as was noted in step 2 under Disconnecting
the Displacement Pump. Position the displace -
ment pump (17) on the tie rods (9).
4. Screw the locknuts (3) onto the tie rods (9) loosely .
Screw the coupling nut (10) onto the air motor
(16). Install the upper cotter pin (1).
5. Mount the pump and reconnect all hoses. Recon -
nect the ground wire if it was disconnected during
repair.
6. T
ighten the tie rod locknuts (3) evenly , and torque
to 40–50 ft–lb (54–68 N.m).
7. T ighten the packing nut/wet–cup (R) with the
wrench (5) supplied, so it is just snug – no tighter .
Fill the wet–cup half full with Graco Throat Seal
Liquid or compatible solvent. Start the pump and
run it slowly , at about 20 psi (140 MPa, 1.4 bar) air
pressure, to check that it is operating properly .
16
17
12
5
10
11
1
7
9
3
U
4
8
R
MODEL 217–579
SHOWN
1
AIR INLET
FLUID OUTLET
Fig. 2
1
2
Torque to 40–50 ft-lb
(54–68 N m)
Lubricate
1
2
1

14 306–694
Parts
Model 237–004, Series A
30:1 Ratio Bulldog Pump,
with Reduced Icing Quiet Air Motor and Severe–Duty Displacement Pump
Includes items 1–17
REF PART
NO. NO. DESCRIPTION QTY
1 100–103* PIN,
cotter;
0.12” (3.2 mm) x 1.5” (38 mm) 2
3 101–712 NUT
, lock; w/nylon inserts; 5/8–1 13
4 101–936 NUT , hex, jam; 3/4–10 1
5 102–176 WRENCH, spanner 1
7 158–674*
SEAL, o–ring; buna–N 1
8 180–180 ELBOW
, street; 1–1/2” npt(m) x
1” npt(f) 1
9 167–911 ROD, tie; 7” (178 mm),
shoulder–to–shoulder 3
10 168–210 NUT , coupling 1
11 168–211 COUPLING 1
12 168–212 ROD, connecting 1
14 176–529**
LABEL, warning (not shown) 1
16 237–001 BULLDOG AIR MOTOR,
reduced icing, quiet
See 307–304 for parts 1
17 217–530 DISPLACEMENT PUMP ASSY
See 307–862 for parts 1
* Recommended “tool box” spare parts. Keep on hand to re -
duce
downtime.
** Extra warning tags and labels available at no extra charge.
306 and 307 numbers in descriptions refer to separate instruc -
tion
manuals, supplied.
16
17
4
5
7*
10
11
12
9
3
8
*1
*1

15
306–694
Parts
Model 221–068, Series A
30:1 Ratio Bulldog Pump,
with Quiet Air Motor and Severe–Duty Displacement Pump
Includes items 1–17
REF PART
NO. NO. DESCRIPTION QTY
1 100–103* PIN,
cotter;
0.12” (3.2 mm) x 1.5” (38 mm) 2
3 101–712 NUT
, lock; w/nylon inserts; 5/8–1 13
4 101–936 NUT , hex, jam; 3/4–10 1
5 102–176 WRENCH, spanner 1
7 158–674* SEAL, o–ring; buna–N 1
8 180–180 ELBOW
, street; 1–1/2” npt(m) x
1” npt(f) 1
9 167–911
ROD, tie; 7” (178 mm),
shoulder–to–shoulder 3
10 168–210 NUT
, coupling 1
11 168–211 COUPLING 1
12 168–212 ROD, connecting 1
14 176–529**
LABEL, warning (not shown) 1
16 215–255 BULLDOG AIR MOT OR, quiet
See 307–304 for parts 1
17 217–530 DISPLACEMENT PUMP ASSY
See 307–862 for parts 1
* Recommended “tool box” spare parts. Keep on hand to re -
duce
downtime.
** Extra warning tags and labels available at no extra charge.
306 and 307 numbers in descriptions refer to separate instruc -
tion
manuals, supplied.
16
17
4
5
7*
10
11
12
9
3
8
*1
*1

16 306–694
Parts
Model 217–579, Series B
30:1 Ratio Bulldog Pump,
with Standard Air Motor and Severe–Duty Displacement Pump
Includes items 1–17
REF PART
NO. NO. DESCRIPTION QTY
1 100–103* PIN,
cotter;
0.12” (3.2 mm) x 1.5” (38 mm) 2
3 101–712 NUT
, lock; w/nylon inserts; 5/8–1 13
4 101–936 NUT , hex, jam; 3/4–10 1
5 102–176 WRENCH, spanner 1
7 158–674* SEAL, o–ring; buna–N 1
8 180–180 ELBOW
, street; 1–1/2” npt(m) x
1” npt(f) 1
9 167–911
ROD, tie; 7” (178 mm),
shoulder–to–shoulder 3
10 168–210 NUT
, coupling 1
11 168–211 COUPLING 1
12 168–212 ROD, connecting 1
14 172–447**
LABEL, warning (not shown) 1
16 208–356 BULLDOG AIR MOT OR, standard
See 307–049 for parts 1
17 217–530 DISPLACEMENT PUMP ASSY
See 307–862 for parts 1
* Recommended “tool box” spare parts. Keep on hand to re -
duce
downtime.
** Extra warning tags and labels available at no extra charge.
306 and 307 numbers in descriptions refer to separate instruc -
tion
manuals, supplied.
16
17
4
5
7*
10
11
12
9
3
8
*1
*1

17
306–694
Parts
Model 237–067, Series A
30:1 Ratio Bulldog Pump,
with Standard Air Motor and PTFE–Packed Displacement Pump
Includes items 1–17
REF PART
NO. NO. DESCRIPTION QTY
1 100–103* PIN,
cotter;
0.12” (3.2 mm) x 1.5” (38 mm) 2
3 101–712 NUT
, lock; w/nylon inserts; 5/8–1 13
4 101–936 NUT , hex, jam; 3/4–10 1
5 102–176 WRENCH, spanner 1
7 158–674* SEAL, o–ring; buna–N 1
8 180–180 ELBOW
, street; 1–1/2” npt(m) x
1” npt(f) 1
9 167–911
ROD, tie; 7” (178 mm),
shoulder–to–shoulder 3
10 168–210 NUT
, coupling 1
11 168–211 COUPLING 1
12 168–212 ROD, connecting 1
14 172–447**
LABEL, warning (not shown) 1
16 208–356 BULLDOG AIR MOT OR, standard
See 307–049 for parts 1
17 237–066 DISPLACEMENT PUMP ASSY,
PTFE
packed,
See 307–862 for parts 1
* Recommended “tool box” spare parts. Keep on hand to re -
duce
downtime.
** Extra warning tags and labels available at no extra charge.
306 and 307 numbers in descriptions refer to separate instruc -
tion
manuals, supplied.
16
17
4
5
7*
10
11
12
9
3
8
*1
*1

18 306–694
Dimensions
Model 217–579 Shown
3/4 npt(f)
AIR INLET
3/4 npt(f)
FLUID OUTLET
1” npt(f)
FLUID INT AKE ELBOW
See 307–049 or 307–304 for
Air Motor Dimensional Drawing.
OPTIONAL
1–1/2” npt(f)
FLUID INT AKE
42.34 in.
(1075.5 mm)
22.09 in.
(561.1 mm)
2.12 in.
(53.9 mm)
Mounting Hole
Layout
USE GASKET 161–806
4” (102 mm)
1.375”
(34.9 mm) R
Four 0.437” (1 1.1
dia. holes on
10.5” (267 mm)
bolt circle
9.75” (247.7 mm) dia.
90
45
Manual
Change Summary
This manual was updated to include the changes from
PCN W .

306–694
Technical Data
Maximum fluid working pressure 3000 psi (21.0 MPa, 210 bar) . . . . . . . . . . . . . . . . . . . . . . . . . .
Air input pressure operating range 40–100 psi (0.28–0.7 MPa, 2.8–7 bar) . . . . . . . . . . . . . . . .
Ratio 30:1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump cycles per 1 gallon (3.8 liters) 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum recommended pump speed for continuous operation 60 cycles per min . . . . . . . . .
Maximum flow 3 gpm (1 1.34 liter/min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air consumption approx. 34 scfm (0.95 m /min). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
at 1 gpm (3.8 liters/min) at 100 psi (0.7 MPa, 7 bar) air pressure
Air inlet 3/4 npt(f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid outlet 3/4 npt(f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight approx. 75 lb (34 kg) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wetted parts See displacement pump manual 307–862 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
500
1000
1500
2000
2500
3000
012345
FLUID FLOW (TEST FLUID: NO. 10 WEIGHT OIL)
gpm
liters/min
To find Fluid Outlet Pressure (bar/psi/MPa) at a specific fluid flow
(lpm/gpm) and operating air pressure (bar/psi/MPa):
1. Locate desired flow along bottom of chart.
2. Follow vertical line up to intersection with selected fluid outlet
pressure curve (black). Follow left to scale to read fluid outlet
pressure.
T
o find Pump Air Consumption (m  /min or scfm) at a specific fluid
flow (lpm/gpm) and air pressure (bar/psi):
1. Locate desired flow along bottom of chart.
2. Read vertical line up to intersection with selected air consumptio
n
curve (gray). Follow right to scale to read air consumption.
cycles/min 20
scfm
m  /
min
20
1.120
0.56
psi
bar
MPa
40 psi (0.3 MPa, 3 bar)
air pressure
70 psi (0.49 MPa, 4.9 bar)
air pressure
40 psi (0.3 MPa, 3 bar)
air pressure
70 psi (0.49 MPa, 4.9 bar)
air pressure
KEY: Fluid Outlet Pressure – Black Curves
Air Consumption – Gray Curves
40
35
3.5
70
7.0
175
17.5
140
14.0
105
10.5
7.6
40
100
100 psi (0.7 MPa, 7 bar)
air pressure
100 psi (0.7 MPa, 7 bar)
air pressure
210
21.0
80
15.2
2.80
1.680
60
2.240
80
19.011.43.8
60
3
2
2
1
1

20 306–694
Graco W arranty
Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. With the exception of
any special extended or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or
replace any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed,
operated and maintained in accordance with Graco’ s written recommendations.
This warranty does not cover , and Graco shall not be liable for general wear and tear , or any malfunction, damage or wear caused by
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or
substitution
of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of
Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,
installation, operation or maintenance or structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for
verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect
in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor , and
transportation.
Graco’s
sole obligation and buyer ’ s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property , or any
other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the
date of sale.
GRACO MAKES NO W ARRANTY , AND DISCLAIMS ALL IMPLIED W ARRANTIES OF MERCHANT ABILITY AND FITNESS FOR
A P ARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT , MA TERIALS OR COMPONENTS SOLD BUT
NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, gas engines,
switches,
hose, etc.), are subject to the warranty , if any , of their manufacturer . Graco will provide purchaser with reasonable assistance
in making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract,
breach of warranty , the negligence of Graco, or otherwise.
FOR GRACO CANADA CUST OMERS
The parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties
reconnaissent
avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures
judiciaires exécutés, donnés ou intentés à la suite de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Phone Number
TO PLACE AN ORDER , contact your Graco distributor , or call this number to identify the distributor closest to you:
1–800–367–4023 T oll Free
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Sales Offices: Minneapolis, Detroit, Los Angeles
Foreign Offices: Belgium, Canada, England, Korea, France, Germany , Hong Kong, Japan
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
PRINTED IN U.S.A. 306–694 January 1961, Revised July 1997