Graco Bulldog Hydra-Cat Series Datasheet

Instructions – Parts List
BULLDOG HYDRA–CATRFIXED RATIO
Proportioning Pumps
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
Two or Three Displacement Pump Models
in Various Mix Ratios, Pressure Ratios
and Flow Volume
Available as Bare Pumps,
Wall-Mounted* or Free-Standing* Models
*Includes Mixing Manifolds, Automatic Pressure Relief Valves,
Check Valves, Pressure Gauges and Regulators
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Charts 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installations 7, 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation – Optional Fluid Heaters 13. . . . . . . . . . . . . . . . . . . . . . .
Installation – Optional Solvent Pump 15. . . . . . . . . . . . . . . . . . . . . .
Flushing 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shutdown and Care of the System 23. . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service – Displacement Pump 26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
308225K
EN
Read warnings and instructions.
For a list of models, see page 6.
02910A

3082252
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
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. Splashing fluid 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 spray gun at anyone or at any part of the body.
DDo not put your hand or fingers over the spray tip/nozzle.
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.
DCheck the gun diffuser operation weekly. Refer to the gun manual.
DAlways have the trigger guard on the spray 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 19 if the spray tip/nozzle clogs and whenever you:
are instructed to relieve pressure; stop spraying; clean, check, or service the equipment; and install
or clean the spray tip/nozzle.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Do not mend or repair any part of the hose assembly.
If the hose is damaged, replace it immediately.
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 your body and tools clear of any moving parts when starting or operating the equipment.

308225 3
WARNING
FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD
Improper grounding, poor ventilation, open flames, or sparks can cause a hazardous condition and
result in fire, explosion, electric shock or other serious injury.
DGround the equipment and the object being sprayed. See Grounding on page 10.
DDo not use the heater with flammable liquids, such as those having flash points below 200_F
(93_C).
DAll electrical wiring must be done by trained and qualified personnel and comply with all local codes
and regulations.
DIf there is any static sparking while using the equipment, stop spraying immediately. Identify and
correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
DDo not smoke within the spray area.
DExtinguish all the open flames or pilot lights within the spray area.
DKeep the spray area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all the equipment within the spray area.
DDo not turn on or off any light switch within the spray area while operating or if fumes are present.
DDo not operate a gasoline engine within 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.
DGraco does not manufacture or supply any of the reactive chemical components that may be used
in this equipment and is not responsible for their effects. Graco assumes no responsibility for loss,
damage, expense or claims for personal injury or property damage, direct or consequential, arising
from the use of such chemical components.

3082254
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.
DSee the chart on page 6 for important pressure rating information. The maximum working pres-
sure of each model is also shown on the pump identification plate. Be sure that all dispensing
equipment and accessories are rated to withstand the maximum working pressure of your pump.
Do not exceed the maximum working pressure of the lowest rated system component.
DNever operate the pump without the automatic pressure relief valves and drainage kits installed.
These valves relieve fluid pressure through a drain port at the bottom of the valve if the displace-
ment pump pressure exceeds the working pressure.
DDo not lift pressurized equipment.
DUse only Graco approved hoses. Do not remove hose spring guards, which help protect the hose
from rupture caused by kinks or bends near the couplings.
DRoute the hoses away from the 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 the equipment.
DUse fluids and solvents that are compatible with the equipment wetted parts. See the Technical
Data section of all the equipment manuals. Read the fluid and solvent manufacturer’s warnings.
DComply with all applicable local, state and national fire, electrical and other safety regulations.

308225 5
Notes
head.notes

3082256
Model Charts
Pressure and Ratio Ratings for Bulldog Pumps
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of over-pressurizing a component, which can result in an explosion and serious injury, never
operate the system at a working pressure higher than the lowest rated component in the system. All fluid side
components, such as dispensing valves; regulators; and hoses, must have a working pressure equal to or
greater than the pressure given in Column B for each pump model.
Column A gives the maximum pump fluid output pressure.
Column B gives the minimum working pressure required for all system components, based on the automatic relief
valve settings. Components included by Graco with the models listed meet or exceed this requirement.
Models with Two Displacement Pumps
AB
Mix
Model No.
Maximum Pump
Fluid Output
Pressure*
At Maximum
Air Pressure
Of:
Minimum
Component
Working Pressure
Normal
Pressure
Ratio
(Fl id t Ai )
Nominal
Flow
Volume
@ 40 cpm
Mix
Ratio Bare Wall Stand psi MPa, bar psi MPa, bar psi MPA, bar (Fluid to Air) gpm lpm
1:1 231897 231836 231865 3000 21, 207 86 0.6, 6 3000 21, 207 34.7 1.8 6.8
Models with Three Displacement Pumps
AB
Mix
Model No.
Maximum Pump
Fluid Output
Pressure*
At Maximum
Air Pressure
Of
Minimum
Component
Working Pressure
Normal
Pressure
Ratio
(Fl id t Ai )
Nominal
Flow
Volume
@ 40 cpm
Mi
x
Ratio Bare Wall Stand psi MPA, bar psi MPa, bar psi MPA, bar (Fluid to Air) gpm lpm
2:1 231908 231847 231876 2320 16, 160 100 0.7, 7 2900 20, 200 23.2 2.7 10.1
2:1 231910 231849 231878 3000 21, 207 86 0.6, 6 3600 25, 248 34.7 1.8 6.7
3:1 231912 231851 231880 2610 18, 180 100 0.7, 7 2900 20, 200 26.1 2.4 8.9
4:1 231915 231854 231883 2780 19, 192 100 0.7, 7 2900 20, 200 27.8 2.2 8.4

308225 7
Typical Installation
About the Typical Installations
These pumps are designed to be part of a Hydra-Cat
dispensing system that will proportion, mix, and
dispense two-component fluids. The typical installa-
tions shown below and on page 8 are only guidelines
to setting up a complete proportioning system. For
clarity, various components are shown in the correct
order but may not be shown in the exact position of the
installed system. For assistance in designing your
system, contact your nearest Graco representative.
NOTE: When pressure feeding the proportioning
pump, mount fluid pressure gauges (J) at the propor-
tioning pump inlets to monitor proper adjustment of the
feed pump pressures. Never exceed 25% of the
Hydra-Cat pump outbound fluid pressure on the feed
supply.
Light Viscosity System
Two Displacement Pumps,
5:1 Ratio Feed Pumps
1See note above
Connect to drain bottle.
See Fig. 5, page 11
2
KEY
A Bleed-type master
air valve
B Air filter
C Air lubricator
D Pump runaway valve
E Pump air regulator
F Feed pump
G Ground wire
H Proportioning pump
J Fluid pressure gauge
K Check valve
L Automatic pressure relief
valve
M Fluid filter
N Mixer manifold
P Fluid drain valve
Q Fluid shutoff valve
R Static mixer
S Dispense valve
T Fluid regulator
U Solvent pump
V Fluid strainer
* Included with wall or stand models
Fig. 1
BA
FG
A
E
HK* L*
M
N*
P*
Q
R
Q*
K
S
M
J*
T
Q*
A*E*
V*
U
1
02911
2
HARDENER RESIN
RES
HARD
RES
HARD
C
D

3082258
Typical Installation
About the Typical Installations
These pumps are designed to be part of a Hydra-Cat
dispensing system that will proportion, mix, and
dispense two-component fluids. The typical installation
iss shown below and on page 7 are only a guidelines
to setting up a complete proportioning system. For
clarity, various components are shown in the correct
order but may not be shown in the exact position of the
installed system. For assistance in designing your
system, contact your nearest Graco representative.
NOTE: When pressure feeding the proportioning
pump, mount fluid pressure gauges (J) at the propor-
tioning pump inlets to monitor proper adjustment of the
feed pump pressures. Never exceed 25% of the
Hydra-Cat pump outbound fluid pressure on the feed
supply.
Heavy Viscosity Heated System
Three Displacement Pumps,
10:1 Ratio Feed Pumps
1
2
See note above
Connect to drain bottle.
See Fig. 5, page 11
KEY
A Bleed-type master air valve
B Air filter
C Air lubricator
D Pump runaway valve
E Pump air regulator
F Feed pump
G Ground wire
H Proportioning pump
J Fluid pressure gauge
K Check valve
L Automatic pressure
relief valve
M Fluid filter
N Mixer manifold
P Fluid drain valve
Q Fluid shutoff valve
R Static mixer
S Dispense valve
T Fluid regulator
U Solvent pump
V Fluid strainer
W Fluid heater
X Supply manifold
* Included with wall or stand models
02912
Fig. 2
D
B
A
C
FG
A
E
2
HJ* K* L* M
N**
P**
Q
R
Q**
K
S
M
J*
T
Q*
A*E*
V*
U
1
W
X*
2

308225 9
Installation
Bare Pumps
Bare pumps are available for those installations which
require a highly customized system. For a safe and
efficient system, Graco recommends that the air and
fluid components supplied with the Wall Mount and
Cart Mount models also be used in customized
systems. Refer to the Parts Drawings starting on page
28 for part numbers. In addition, the accessories
shown in the Typical Installation drawings and
discussed in the following pages of this manual should
be used.
Be sure all accessories are sized properly for the air
and fluid requirements of your system.
Read all instructions in the Installation section for
further details.
NOTES:
1. Models with three displacement pumps always use
the two outer displacement pumps to supply the
resin and the middle displacement pump to supply
the hardener.
2. Label all pumps, hoses, fluid regulators, etc. to
indicate whether they are for the resin side or
hardener side of the system.
Mounting the Pump
Mount the pump to suit your installation. The bare
pump can be mounted on a wall bracket or on a cart.
See Dimensions on page 43. The Bulldog pump and
accessories weigh approximately 115 lb (52 kg). The
pump stand and accessories weigh 55 lb (25 kg).
For a wall mount, be sure the bracket and wall are
strong enough to support the pump, accessories,
plumbing and stress caused by pump operation.
Locate the bracket about 5 ft (1.5 m) above the floor.

30822510
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding could cause static
sparking, which could cause a fire or
explosion. To reduce the risk of property
damage or serious injury, follow the
grounding instructions below.
The following grounding instructions are minimum
requirements for a system. Your system may include
other equipment or objects which must be grounded.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Your
system must be connected to a true earth ground.
1. Pump:
a. Loosen the grounding lug locknut (BB) and
washer (AA).
b. Insert one end of a 14 ga. (1.5 mm@) minimum
ground wire (G) into the slot in lug (CC) and
tighten the locknut securely. See Fig. 3.
c. Connect the other end of the ground wire to a
true earth ground. Order part number 237569
grounding clamp wire.
Fig. 3
G
BB AA
CC
2. Air hoses: use only grounded hoses with a maxi-
mum of 500 feet (150 m) combined hose length to
ensure grounding continuity.
3. Fluid hoses: use only grounded fluid hoses.
4. Air compressor: follow manufacturer’s recom-
mendations.
5. Spray gun or dispensing valve: grounding is
obtained through connection to a properly
grounded fluid hose and pump.
6. Fluid supply container: according to local code.
7. Object being sprayed: according to your local
code.
8. All solvent pails used when flushing,according
to local code. Use only metal pails, which are con-
ductive, 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.
9. To maintain grounding continuity when flush-
ing or relieving pressure,always hold a metal
part of the dispensing unit firmly to the side of a
grounded metal pail, then trigger the dispensing
unit.