Graco 237367 Operation manual

Instructions – Parts List
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
STAINLESS STEEL
Dura–Flot750 Pumps
With Severe–Duty Rod and Cylinder
Patent No. 5,456,583
Foreign Patents Pending
308418G
Read warnings and instructions.
See page 2 for model numbers and maximum
working pressures.
Model 237367
Model 237635 TI0483
TI0483
Parts

2 308418
List of Models
Pump Part No.
and Series Pump Model
Displacement
Pump Part No.
and Series Ratio
Maximum Fluid
Working Pressure
Maximum Air
Input Pressure
237635,
Series B
Kingt236456,
Series B
68:1 46.9 MPa, 469 bar
(6800 psi)
0.7 MPa, 7 bar
(100 psi)
236460,
Series B
Reduced Icing
Quiet Kingt
236456,
Series B
68:1 46.9 MPa, 469 bar
(6800 psi)
0.7 MPa, 7 bar
(100 psi)
237367,
Series A
Bulldogr236456,
Series B
33:1 22.8 MPa, 228 bar
(3300 psi)
0.7 MPa, 7 bar
(100 psi)
237613,
Series A
Reduced Icing
Quiet Bulldogr
236456,
Series B
33:1 22.8 MPa, 228 bar
(3300 psi)
0.7 MPa, 7 bar
(100 psi)
Table of Contents
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation/Maintenance 10. . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Chart 13. . . . . . . . . . . . . . . . . . . . . . . . .
Service 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Tools 14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the Displacement Pump 14. . . . . . .
Reconnecting the Displacement Pump 14. . . . . . . .
Displacement Pump Service 16. . . . . . . . . . . . . . . .
Parts Drawings and Parts Lists 21. . . . . . . . . . . . . . . . . .
Pump Assemblies 21. . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement Pump 23. . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 27. . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Information 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

308418 3
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.
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 pages 25–26 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 82_C (180_F) or below –40_C (–40_F).
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.

4 308418
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.
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 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 10 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 10 to prevent the
equipment from starting unexpectedly.

308418 5
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 7.
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.

6 308418
Notes

308418 7
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. Refer to
Product Data Sheet, Form No. 305722 (Bulldog
Pumps) or Form No. 305723 (King Pumps). If you
supply your own accessories, be sure they are ade-
quately sized and pressure rated for your 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 5.
1. King Pumps: use a ground wire and clamp. See
Fig. 1. Remove the ground screw (Z) and insert
through eye of ring terminal at the end of ground
wire (Y). Fasten ground screw back onto pump
and tighten securely. Connect the other end of the
wire to a true earth ground. Order Part No. 222011
Ground Wire and Clamp.
Bulldog Pumps: use a ground wire and clamp. See
Fig. 2. Loosen the grounding lug locknut (W) and
washer (X). Insert one end of a 1.5 mm@(12 ga)
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. Order Part
No. 237569 Ground Wire and Clamp.
Fig. 1 TI1052
Y
Z
Fig. 2
W
X
Y
Z
0864
2. Air and fluid hoses: use only electrically conductive
hoses.
3. Air compressor: follow manufacturer’s recommen-
dations.
4. Spray gun: ground through connection to a prop-
erly grounded fluid hose and pump.
5. Fluid supply container: follow your local code.
6. Object being sprayed: 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. To maintain grounding continuity when flushing or
relieving pressure, hold a metal part of the spray
gun firmly to the side of a grounded metal pail,
then trigger the gun.
System Accessories
Fig. 3 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.
Air and Fluid Hoses
Be sure all air hoses (H) and fluid hoses (N and P) are
properly sized and pressure-rated for your system.
Use only electrically conductive hoses. Fluid hoses
must have spring guards on both ends. Use a whip
hose (P) and a swivel (R) between the main fluid hose
(N) and the gun (S) to allow freer gun movement.
Mounting Accessories
Mount the pump (A) to suit the type of installation
planned. Fig. 3 illustrates a wall mount system. Pump
dimensions and the mounting hole layout are shown
on page 27.
If you are using a floor stand, refer to its separate
manual for installation and operation instructions.

8 308418
Installation
System Accessories (continued)
WARNING
A bleed-type master air valve (E) and a fluid drain
valve (M) are required in your system. These
accessories help reduce the risk of serious injury,
including fluid injection and 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 off. Trapped air can cause the pump to cycle
unexpectedly. Locate the valve close to the pump.
Order Part No. 107141.
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 Part No. 235992.
Air Line Accessories
Install the following accessories in the locations shown
in Fig. 3, using adapters as necessary:
DAn air line lubricator (D) provides automatic air
motor lubrication.
DAbleed-type master air valve (E) 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 eas-
ily accessible from the pump, and is located
downstream from the air regulator.
DAn air regulator (F) controls pump speed and out-
let 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.
DApump runaway valve (C) 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.
DAn air manifold (G) has a 3/4 npsm(f) swivel air
inlet. It mounts to the pump support bracket, and
provides ports for connecting lines to air-powered
accessories.
DAn air line filter (J) removes harmful dirt and
moisture from the compressed air supply. Also,
install a drain valve (W) at the bottom of each air
line drop, to drain off moisture.
DA second bleed-type air valve (K) isolates the air
line accessories for servicing. Locate upstream
from all other air line accessories.
Fluid Line Accessories
Install the following accessories in the locations shown
in Fig. 3, using adapters as necessary:
DA fluid filter (L) with a 60 mesh (250 micron)
stainless steel element, to filter particles from the
fluid as it leaves the pump.
DA fluid drain valve (M), which is required in your
system, helps relieve fluid pressure in the hose
and gun (see the WARNING at left).
DA gun (S) dispenses the fluid. The gun shown in
Fig. 3 is an airless spray gun for light to medium
viscosity fluids.
DA gun swivel (R) allows freer gun movement.
DA suction kit (T) allows the pump to draw fluid
from a supply container.
CAUTION
To prevent intake valve damage, always apply PTFE
tape to the female threads of the intake valve before
connecting a suction hose or fitting to the intake.

308418 9
Installation
TI0484
Fig. 3
KEY
APump
BWall Bracket
CPump Runaway Valve
DAir Line Lubricator
EBleed-Type Master Air Valve
(required, for pump)
FPump Air Regulator
GAir Manifold
HElectrically Conductive
Air Supply Hose
JAir Line Filter
KBleed-Type Master Air Valve
(for accessories)
LFluid Filter
MFluid Drain Valve (required)
NElectrically Conductive
Fluid Supply Hose
PFluid Whip Hose
RGun Swivel
SAirless Spray Gun
TSuction Kit
YGround Wire and Clamp
(required; see page 7
for installation instructions)
WAir Line Drain Valve
TYPICAL INSTALLATION
A
B
C
D
E
F
G
H
JK
M
N
P
Y
MAIN AIR LINE
L
R
S
T
W

10 308418
Operation/Maintenance
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. 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 tips.
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),
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 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.
Packing Nut/Wet-Cup
Before starting, fill the packing nut (8) 1/3 full with
Graco Throat Seal Liquid (TSL) or compatible solvent.
See Fig. 4.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure at left.
The packing nut is torqued at the factory and is ready
for operation. If it becomes loose and there is leaking
from the throat packings, relieve pressure, then torque
the nut to 61–75 NSm (45–55 ft-lb) using the supplied
wrench (110). Do this whenever necessary. Do not
overtighten the packing nut.
TI0485
Fig. 4
110
81
Model
237367
Shown
1Torque to 61–75 NSm
(45–55 ft-lb)