684025
INSTRUCTIONS
Revision E
This manual contains important
warnings and information.
READ AND RETAIN FOR REFERENCE
Instructions
Air-Powered King and Premier
Hydra-Cat® H.P.
Variable Ratio
Proportioning Pump
100 PSI (7 bar) Maximum Working Air Pressure
5000 PSI (333 bar) Maximum Working Fluid Pressure
Model: See Chart
Assembly
Part #
Ratio
Min.
Ratio
Max.
965478
965466
965477
965479
965481
1.50
3.00
1.00
2.00
1.50
4.50
9.00
3.00
6.00
4.50
WARNING
MOVING PARTS HAZARD
Relieve fluid and air pressure to unit before
servicing unit. Do not operate with panels
removed. Follow pressure relief procedure on
page 11.
WARNING
Graco Inc. does not manufacture or supply any of the reactive chemical components that are used in this equipment
and is not responsible for their effects. Because of the vast number of chemicals that could be used and their
varying chemical reactions, the buyer and user of this equipment should determine all factors relating to the fluids
used, including any of the potential hazards involved. Particular inquiry and investigation should be made into
potential dangers relating to toxic fumes, fires, explosions, reaction times, and exposure of human beings to the
individual components or their resultant mixtures. Graco assumes no responsibility for loss, damage, expense or
claims for bodily injury or property damage, direct or consequential, arising from the use of such chemical
components.
GRACO INC.
P.O. BOX 1441
MINNEAPOLIS, MN
55440-1441
Copyright 1998 Graco Inc.
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Symbols
Warning Symbol
Caution Symbol
WARNING
This symbol alerts you to the possibility of serious injury
or death if you do not follow the instructions
CAUTION
This symbol alerts you to the possibility of damage to or
destruction of equipment if you do not follow the
instructions.
Definition of Terms
WARNING: Alerts the user to avoid or correct conditions
BASE: Also called polyol or resin, is one of two reactive
which could cause serious injury.
chemicals used in a plural component system.
CAUTION: Alerts the user to avoid or correct conditions
CATALYST: Also called hardener, is the fluid which reacts
which could damage or destroy equipment.
with the base fluid.
NOTE: Identifies helpful information.
PART: An undefined unit of measurement. When you
determine the size of the unit (ounce, pint, gallon), use that
measurement consistently in setting up your system.
VRHC: The abbreviation for Variable Ratio Hydra–Cat
Pump. This pump automatically proportions and mixes two
fluids in a prescribed ratio, which is variable within the
ranges listed on the cover.
SPRAY GUN: This term refers to any type of spray gun or
dispensing valve used to spray or dispense the fluid being
pumped.
WARNING
PLURAL COMPONENT FLUID HAZARD
Before using this equipment, read the fluid manufacturer’s warnings and determine all facts relating to the
fluids used, including any of the potential hazards relating to toxic fumes, fires, explosions, reaction times,
and exposure of human beings to the individual components of their resultant mixtures.
•
Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local, state
and national guidelines.
•
•
Wear the appropriate protective clothing, gloves, eyewear, and respirator.
Graco 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.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston and the secondary pump lever and connecting rod area, can
pinch or amputate fingers.
•
•
Do not operate the equipment with the guards removed.
Keep your body and tools clear of any moving parts when starting or operating the equipment.
684025
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WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames, or sparks can cause a hazardous condition and result in
fire or explosion and serious injury.
•
•
•
•
•
•
•
•
Ground the equipment and the object being sprayed. See Electrical Grounding on page 8.
Extinguish all the open flames or pilot lights in the spray area.
Electrically disconnect all equipment in the spray area.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Do not turn on or off any light switch in the spray area while operating or if fumes are present.
Do not smoke in the spray area.
Do not operate a gasoline engine in the spray area.
If there is any static sparking while using this equipment, stop spraying immediately. Identify and
correct the problem.
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result in
serious injury.
•
•
•
This equipment is for professional use only.
Read all instruction manuals, tags, and labels before operating the equipment.
INSTRUCTIONS
Use the equipment only for its intended purpose. If you are uncertain about the usage, call your Graco
distributor.
•
•
•
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Check the equipment daily. Repair or replace worn or damaged parts immediately.
All system components must meet or exceed the pressure ratings printed on the pressure relief valve.
The lever amplification or the secondary pump enables very high fluid pressures to be achieved. A
5000 psi working pressure range relief valve is required on both cylinders to limit the fluid pressure. Do
not tamper with the pressure relief valve or serious bodily injury could result.
•
•
Do not lift pressurized equipment.
Route the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 180ºF (82ºC) or below -40ºF (-40ºC).
•
•
Do not use hoses to pull equipment.
Use fluids or 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.
•
•
Fluid hoses must have spring guards on both ends to protect them from rupture caused by kinks or
bends near the couplings.
Comply with all applicable local, state, and national fire, electrical, and safety regulations.
4
684025
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WARNING
INJECTION HAZARD
Spray from the spray 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.
•
Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate medical
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 spray gun (if so equipped) when spraying.
Check the spray gun diffuser (if so equipped) operation weekly. Refer to the gun manual.
Be sure the spray gun trigger safety operates before operating the gun.
Lock the spray gun trigger safety when you stop spraying.
Follow the Pressure Relief Procedure on page 11 when you are instructed to relieve pressure, stop
spraying, check, clean or service any system equipment, or install or change spray tips.
•
•
Tighten all fluid connections before each use.
Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
Permanently coupled hoses cannot be repaired.
•
Handle and route hoses and tubes carefully. Keep hoses and tubes away from moving parts and hot
surfaces. Do not use the hoses to pull equipment. Do not expose Graco hoses to temperatures above
180ºF (82ºC) or below -40ºF (-40ºC).
684025
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Specifications of Hydra–Cat H.P. Pumps
The following chart gives specifications for the Hydra-Cat
H.P. pumps, using No. 10 weight oil. The volumetric ratio
is expressed as the proportion of the volume of fluid of the
primary pump compared to the volume of fluid of the
secondary pump.
For example, Model 965477 has a minimum volumetric
ratio of 1:1. At this setting the primary and secondary
pumps combined will deliver an output of 3.0 gpm. The
maximum volumetric ratio for Model 965477 is 3:1 and the
combined output at that setting is 2.0 gpm.
Ratio
Min Max
At Minimum Ratio Setting
Stall Stall Output Output
At Maximum Ratio Setting
Lower ID
Air Motor
Assembly
Part No.
Stall
PSI
Stall
Bar
Output
GPM
Output
LPM
Master
Slave
DF
PSI
Bar
368
307
GPM
3.8
LPM
14.4
17.3
DF
9
Premier
Premier
965481
965479
1.50 4.50
2.00 6.00
5333
4444
7273
5714
502
394
2.8
3.6
10.6
13.4
6
6
4.6
12
King
King
King
965477
965478
965466
1.00 3.00
1.50 4.50
3.00 9.00
3803
3042
1901
262
210
131
3.0
3.8
6.1
11.5
14.4
23.0
5704
4148
2282
393
286
157
2.0
2.8
5.1
7.7
6
9
6
6
6
10.6
19.2
18
Note: All Output Pressures Limited To 5000 PSI By Integral Pressure Relief Valves
Note: Pressure outputs calculated at 100 PSI Air Pressure for Premier and 90 PSI Air Pressure for King
Note: Volume outputs calculated at 40 cycles per minute.
Installation
Connect the Fluid Output Lines
Connect electronically conductive fluid hoses to the pump
outlet fittings. Tighten all of the fittings.
The Typical Installation shown is only a guide to setting up
the complete Hydra-Cat H.P. system. For assistance in
designing a system to suit your particular needs, contact
your nearest Graco representative.
NOTE: The reference numbers and letters in the text
correspond to the numbers and letters in the drawings.
Location
Sit the proportioner on a flat floor surface.
Connect the Fluid Supply Lines
Connect the grounded fluid hoses to the pump inlet fittings
(P, R). If the unit will be pressure fed from separate supply
units, install a fluid pressure gauge at each inlet.
NOTE: The pressurized fluid supplies must not exceed 1/4
of the operating fluid pressure of the pump. Pressure above
that level will feed right through the pump and improper
rationing will result.
Fig. 1
6
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KEY
A Bleeder Type
Main Air Valve
B Air Regulator
C Pressure Relief
Valve
D Mix Manifold
E Air Supply Line
F
Air Line Filter
G Air Shutoff Valve
H Air Line Lubricator
J
Base Supply Pump
K Catalyst Supply
Pressure Pot
L
Solvent Supply
Pump
M Mix Manifold Flush
Inlet
N Static Mixer
P Primary Pump Inlet
R Secondary Pump
Inlet
S Ratio Adjustment
Screw
T
Spray Gun
U Ratio Indicator Plate
V Ratio Indicator Pin
Fig. 2 Typical Installation
System Accessories
Connect the Air Supply Line
Refer to Fig. 2.
Connect an electrically conductive air supply hose to the
3/4” npt(f) port of the air manifold (B). Open the bleed-type
master air valve (A) and, using the pressure gauge, set the
air regulator (B) to the desired pressure. See the Typical
Installation and the Parts Drawing.
NOTE: To ensure the maximum pump performance and
safety, be sure that all the accessories used are properly
sized to meet your system requirements and the pressure
limits of the pump. Use only genuine Graco parts and
accessories.
Pressure Relief Valve
In the air line, install an air filter (F) to remove harmful dirt
and moisture from the compressed air supply. Install an air
line lubricator (H) downstream from the air filter, the air
regulator (B) and the bleed-type master air valve (A). A
lubricator will provide automatic lubrication to the air motor.
All components have rated working pressures of 5000 psi
(345 bar) or greater. For more information about the
pressure relief valve, see instruction manual 308547.
WARNING
A bleed-type master air valve (A) is required in your
system to relieve the air trapped between the valve and
the pump after the pump is shut off. Trapped air can
cause the pump to cycle unexpectedly, resulting in
possible serious injury, including amputation.
684025
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Electrical Grounding
4. Spray gun or dispensing valve: Obtain grounding
through connection to a properly grounded fluid hose
and pump.
WARNING
5. Fluid supply container: according to your local code.
6. Object being sprayed: according to local code.
FIRE AND EXPLOSION HAZARD
Static electricity is created by the high velocity
flow of fluid through the pump and hose. If your
system is not properly grounded, sparking may
occur and the system may become hazardous.
7. All solvent pails used when flushing, according to local
code. Use only metal pails which are conductive,
placed on a positively grounded surface. Do not place
the pail on a non-conductive surface, such as paper or
cardboard, which interrupts the grounding continuity.
To reduce the risk of static sparking which can
result in a fire or explosion and cause serious
injury, follow these recommendations for
providing electrical continuity throughout your
system.
8. To maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the gun
or dispensing valve firmly to the side of a grounded
metal pail, then trigger the gun.
Also, read the WARNING section, FIRE AND
EXPLOSION HAZARD on page 4.
1. Pump: Loosen the grounding lug locknut (A) and
2
washer. Insert one end of a 12 ga (1.5 m ) minimum
ground wire (B) into the slot in the lug (C). Tighten the
locknut securely. See Fig. 3. Connect the other end of
the ground wire to a true earth ground. Order a
Grounding Clamp, P/N 103538, and a Grounding Wire,
P/N 208950, (25 feet (7.6 m) long, 12 ga.).
0720
2. Air and fluid hoses: Use only electrically conductive
hoses with a maximum of 500 feet (150 m) combined
hose length to ensure grounding continuity.
3. Air
compressor:
follow
the
air
compressor
manufacturer’s recommendations
8
684025
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Ratio Adjustment
Understanding the terms used with the Hydra–Cat (H.P.)
The primary pump (A) is directly under the air motor (H);
it usually pumps the base fluid. The secondary pump (B)
is on the opposite end of the lever arm (E); it usually
pumps the catalyst. The ratio of the secondary pump(s)
can be changed by adjusting the ratio adjustment screw
(C). See Fig. 4.
System, how it functions, and how to find and set the
correct ratios for your application is the key to easier, more
versatile operation of your proportional system.
Be sure to read and understand the following information
before operating the equipment.
There are three main steps when applying the use of ratios:
(1) determine the ratio that is required, (2) calculate the
ratio setting, and (3) set the ratio on the Hydra-Cat H.P.
system.
Terms
Ratio refers to the simultaneous output of a certain volume
of fluid by the primary and secondary pumps.
D Wet Cups
H Air Motor
Key
A
E Fulcrum and Arm
F Primary Pump Output
G Secondary Pump Output
I
Air Input
J Bleed Type Master Air Valve
Primary Pump
B
Secondary Pump
Ratio Adjustment Screw
C
Fig. 4
684025
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2. The next statement on the can says, “Reduce 3 parts of
the mixture.” So divide the parts of the mixture by 3 parts
to reduce to find the parts reducer.
Determine the Ratio
Set the ratio based on your situation. If :
•
The fluids are supplied at a ready–to–spray
viscosity, simply set the ratio as explained under
Adjusting the Ratio.
6
3
2
parts mixture
parts to reduce
parts reducer
/
•
The fluids are NOT supplied at ready–to–spray
viscosity, the ratio must be determined after the
reducer is added to the base, as instructed in
Procedure 1, below.
3. To determine the ratio of the secondary pump, add the
appropriate parts of base and reducer to find the parts
combined base/reducer.
5
2
7
parts base
parts reducer
parts combined base/reducer to
1 part catalyst
NOTE: Evaporation of the reducer in the base causes
changes in the ratio. To prevent evaporation, store
the base in a closed container.
+
NOTE: Some reducers have very little ability to lubricate
and many cause seals to dry out. To prolong the
seal life, be sure your pump seals are compatible
with the base’s reducer. Contact your Graco
representative for the correct seals to use.
The ratio of the pump is 7:1.
Relationship
Between
the
Primary
and
Secondary Pumps
Moving the fulcrum point away from the primary pump
reduces the secondary stroke length, reducing its fluid
output. Moving the fulcrum point closer to the primary pump
increases the secondary stroke length, increasing its fluid
output.
Procedure 1: Base is not pre-reduced
When adding the reducer to the base before proportioning
with the VRHC system, determine the ratio of the
base/reducer mixture to the catalyst in order to set the
proper ratio.
Fig. 5 shows the relationship between the primary pump
and the secondary pump.
Example:
Adjusting the Ratio
The instructions on the can say “Mix 5 parts base to 1 part
catalyst. Then reduce 3 parts of this mixture to 1 part
reducer.”
See Fig. 2. Use a wrench to rotate the ratio adjustment
screw (S). Rotating the screw clockwise will increase the
ratio. Rotating the screw counterclockwise will decrease
the ratio. The indicator pin (V) will move along the ratio
indicator scale (U) as the ratio adjustment screw is rotated.
When the pin is above the desired ratio, remove the
wrench and perform a ratio test as described on page 12.
1. Add the parts of the base and catalyst to find the parts
mixture.
5
1
6
parts base
parts catalyst
parts mixture
+
Fig. 5
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Operation
WARNING
System Flushing
The pumps were tested with lightweight oil at the factory.
Before operating the pump, thoroughly flush the Hydra-Cat
H.P. to prevent contamination of your fluids.
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. To reduce the risk of
parts, follow the Pressure Relief Procedure
whenever you:
NOTE:
Flush the mixer, hose and gun often enough to prevent
fluid from reacting or curing in them. Contact your fluid
manufacturer for the effective pot life of the fluid you are
using.
1. Put the pump intake hoses into a 5 gallon (20 liter)
container of a compatible solvent. Refer to the fluid
manufacturer’s recommendations.
•
•
•
are instructed to relieve the pressure,
stop spraying,
2. Start the pump as explained below.
check or service any of the system
equipment,
3. Do not install a spray tip yet. Hold a metal part of the
gun firmly to the side of a grounded metal pail. Using
the lowest possible air pressure to the air motor that
will activate the pump, trigger the gun into the pail.
•
or install or clean the spray tips.
4. When clean solvent comes from the spray gun,
release the trigger and carefully check all connections
in the system for leaks.
Pressure Relief Procedure
5. Take the hoses out of the solvent, and trigger the gun
until all the solvent has been pumped out of the hoses.
Immediately turn off the bleeder-type master air valve.
1. Lock the spray gun’s trigger safety.
2. Shut off ALL fluid supplies to the pump.
3. Close the bleed-type master air valve.
4. Unlock the spray gun’s trigger safety.
Start the Pump
1. Close the bleed-type master air valve, and turn the air
regulator knob all the way out (counterclockwise).
5. Hold a metal part of the spray gun firmly to the side
of a grounded metal pail. Trigger the spray gun into
the pail to relieve pressure.
2. Turn on the main air supply.
3. With the mixer manifold handle in the open position,
trigger the gun, slowly open the bleed-type master air
valve, and turn the air regulator knob clockwise until
the pump starts.
6. Lock the spray gun’s trigger safety.
7. Open the sampling valves, having a container ready
to catch the drainage.
4. Allow the pump to cycle slowly until all the air is pushed
out of the lines. Release the trigger. The pump will stall
against the pressure.
8. If you suspect that the spray tip or nozzle or the
hose is completely clogged or that pressure has not
been fully relieved after following the steps above,
follow this procedure: Very slowly loosen the tip
guard retaining nut or hose end coupling and relieve
pressure gradually, then loosen completely. Now
clear the obstruction.
5. The manifold handle controls fluid flow. With the lever
of the manifold in the open (down) position, base and
catalyst are supplied to the gun. To stop the flow,
move the handle to the closed (up) position.
Standard Operating Flushing
Use the solvent valves to flush contaminants and mixed
fluids from the mixer manifold, hose and spray gun. Follow
the procedure provided with the mix manifold assembly.
684025 11
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6. Open the mixer manifold. Use the sampling valves to
adjust the pressures to your normal operating
pressures.
Checking the Ratio
Note: The mix ratio must be checked at the normal
operating fluid pressure of the pump. Most mixer
manifolds provide a means for checking mix ratio
that includes needle valves for adjusting the fluid
pressure during the test. The following procedure is
an example of how to properly check the mix ratio.
7. Close the mixer manifold. Put the sampling
containers under the sampling valves.
8. Open the mixer manifold. Check the ratio; make sure
the pressure is within 20% of your normal operating
pressure. Close the mixer manifold when enough
fluid has been dispensed into the sampling
containers.
1. Open the mixer manifold and trigger your spray gun.
2. Set your operating pressure. After determining the
operating pressure, release the spray gun trigger and
engage the safety latch.
NOTE: If the pressure readings are not within 20% of
your normal operating pressure, follow the
flushing procedure on page 11, then take a
sample again. If your sample ratio is incorrect,
there is a problem with the sampling valves, ratio
setting, or pump operation. Check the ratio
setting or service the sampling valves or pump.
3. Close the mixer manifold inlet valves.
4. Slightly open the sampling valve on the secondary
pump side. Slightly open the sampling valve on the
primary pump side. This will prevent pressure from
building up on the secondary pump, causing the relief
valve to open.
5. Place a grounded waste container under the sampling
valve.
Maintenance
Pump Lubrication
Bearings
Many of the bearing surfaces on the proportioner are
permanently lubricated or are self lubricating. There are
four main bearings (21) on the lever arm that must be
lubricated on a regular interval. The lubrication interval
is every six months in single shift operation. To lubricate
the bearings, follow the pressure relief procedure on
page 11.
Wet Cups
Each of the fluid cylinders has a wet cup (18) at the top
that must be kept lubricated. See figure 6. The wet cups
should be inspected and filled on a weekly basis, or
more frequently if found to be dry. To inspect the wet
cups, follow the pressure relief procedure on page 11.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
With the bleeder type main air valve (1) turned off,
remove the thumb screws (14) and the two guards (15)
from the sides of the proportioner. The wet cups (18)
should be filled to 1/3 full with Graco Throat Seal Liquid
(TSL) or compatible solvent.
With the bleeder type main air valve turned off, remove
the twenty hex bolts (16) with a 13mm wrench or socket
and then remove the four sheet metal covers (17) from
the front and back of the proportioner.
The left rear cover may contain a sensor attached to a
cable. Do not remove the sensor, but carefully set the
cover to the side without straining or damaging the
sensor or cable. The four main bearings (21) are now
exposed. Use the adapter (205532) provided to grease all
four bearings. One or two squirts (2-3 cc) will be
sufficient.
The packing nuts (19) are torqued at the factory and are
ready for operation. If one becomes loose and there is
leaking from the throat packings, relieve the pressure,
then torque the nut to 136–149 N.m (100–110 ft-lb)
using the supplied wrench (20). Do this whenever
necessary. Do not over tighten the packing nut.
12 684025
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Air Lubrication
If your air supply Is very dry, install an air line lubricator
between the air regulator and the pump air motor for
automatic lubrication. Refer to the air motor manual for
details.
Make sure to use an Industrial Grade 1, Heavy Duty,
Extreme Pressure, Lithium Soap Grease, Graco Part
Number 110293 or equivalent.
Replace the covers (17) and the bolts (16) after greasing,
and before starting the machine. The covers (17) are
safety guards and must be in place when the proportioner
is in operation.
KEY
1
2
3
4
5
6
7
8
9
BLEEDER TYPE MAIN AIR VALVE
AIR MOTOR
13 ROD ADAPTER
14 THUMB SCREWS
15 GUARDS
16 HEX BOLTS
17 COVERS
PRIMARY CYLINDER
SECONDARY CYLINDER
FRAME
AIR MOTOR TIE RODS
FLUID CYLINDER TIE RODS
TIE ROD NUTS
18 WET CUPS
19 PACKING NUTS
20 PACKING NUT WRENCH
21 MAIN BEARINGS
22 SNAP RING
23 FLUID OUTLET, PRIMARY
24 FLUID OUTLET, SECONDARY
CONNECTING ROD NUT, AIR MOTOR
10 CONNECTING ROD NUT, PRIMARY
11 CONNECTING ROD NUT, SECONDARY
12 COUPLING COLLARS
Fig. 6
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Troubleshooting
8.
With the main bleed-type air valve (1) off, remove
Troubleshooting Techniques
the thumb screws (14) and guards (15) from each
side of the proportioner.
Because the pumps are mechanically linked, the action of
one pump can affect the readings of the second pump.
Therefore, the key to successful troubleshooting is to be
sure to isolate the problem.
9.
Unscrew the connecting rod nut (10) from the
primary pump. Now you can verify the operation of
the secondary pump alone.
For example, if the secondary pump pressure, as read on
the gauge, is low and sluggish during the pump
changeover. The most likely problem is a binding primary
pump. To isolate the problem:
Reinstall the guards (15) on both sides of the
proportioner. Turn the main air valve (1) back on
and carefully increase the air pressure.
10. Using the sampling valves at the mixer manifold:
1. Relieve the pressure.
A. Open and close the sampling valves and check
for pump stalling on both the up and down
strokes.
2. With the sampling valves still open, set the air supply
regulator to the lowest setting and open the bleed-
type main air valve (1). Refer to figure 6. Increase
the regulator setting until the pump just begins to
move. Notice the position of the secondary pump
(11). Turn off the bleeder-type main air valve (1) so
that the secondary pump rod is at its lowest position
when the pump stops.
B. Check for rapid gauge response during the
pump changeover
11. When the operation of the secondary side has been
verified, reconnect the connecting rod (10) of the
primary pump.
WARNING
To reduce the risk of a serious injury, always follow the
Pressure Relief Procedure on page 11 whenever you
are instructed to relieve the pressure.
WARNING
Use very low air pressure to the air motor when
troubleshooting the system. This system can produce
very high fluid pressure, which can cause serious injury,
including injection, splashing in the eyes or on the skin,
and injury from moving parts.
3.
With the main bleed-type air valve (1) off, remove
the thumb screws (14) and guards (15) from each
side of the proportioner.
To reduce the risk of a serious injury, always follow the
Pressure Relief Procedure on page 11 if the problem
you are checking does not require air.
4.
Unscrew the connecting rod nut (11) from the
secondary pump. Now you can verify the operation
of the primary pump alone.
Reinstall the guards (15) on both sides of the
proportioner. Turn the main air valve (1) back on
and carefully increase the air pressure.
WARNING
5.
Using the sampling valves at the mixer manifold:
A. Open and close the sampling valves and check
for pump stalling on both the up and down
strokes.
To reduce the risk of injuring or amputating your hands,
fingers, or other body parts, never place your hands,
body or tools inside the safety panels for any reason
while the unit is operating.
B. Check for rapid gauge response during the
pump changeover
6.
7.
When the operation of the primary side has been
verified, reconnect the connecting rod (11) of the
secondary.
With the sampling valves still open, set the air supply
regulator to the lowest setting and open the bleed-
type main air valve (1). Increase the regulator setting
until the pump just begins to move. Notice the
position of the primary pump. Turn off the bleeder-
type main air valve (1) so that the primary pump rod
(10) is at its lowest position when the pump stops.
14 684025
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Troubleshooting Chart
PROBLEM
CAUSE
SOLUTION
System will not run or Air pressure or air Increase air pressure. Check air compressor and air supply filters
stops while running.
volume is too low.
regulator, lubricator valves and other components for blockages
and restrictions. If this is a new system, be sure that air supply
components have been sized properly.
The fluid valves or Check the gun, fluid hoses, mix manifold, static mixer, fluid filters,
hoses are closed or regulators, valves and other fluid line components for blockages
restricted.
and restrictions. If this is a new system, be sure that the fluid
components have been sized properly.
The air motor is Service the air motor. See “servicing the Air Motor” on page 17.
worn or damaged.
The displacement
cylinder(s) is
damaged or has
seized
See troubleshooting techniques below to isolate the problem
cylinder. See “Service the cylinders” on page 16.
The fluid pressure
bounces significantly
(>500 psi) while pump is
running
Air volume is too Verify that air pressure at the air motor inlet is not dropping during
low.
pump changeover. Check air compressor and air supply filters
regulator, lubricator valves and other components for blockages and
restrictions. If this is a new system, be sure that air supply
components have been sized properly. 1” NPT hoses, fittings and
accessories are required to provide the necessary air volume.
Feed pump
pressure is too
high.
Reduce feed pump pressure. Feed pump pressures must be less
than 25% of proportioner output pressure.
The displacement
cylinder(s) check
valves are not
seating.
See troubleshooting techniques below to isolate the problem
cylinder. See “Service the cylinders” on page 16.
Mix ratio test is
significantly different from
the mix ratio setting.
Mix ratio test was
not performed at
the normal
Perform ratio test again following ratio test procedure on page 12.
operating pressure
of the pump
Running out of one
material.
Check and refill material reservoirs. Repeat the test after the air has
been removed from the system.
The displacement
See troubleshooting techniques below to isolate the problem
cylinder(s) are worn cylinder(s). See “Service the cylinders” on page 16.
or the check valves
are not seating.
Spray output is spitting
Running out of one Check and refill material reservoirs. Remember that once air is in
material.
Siphon hoses are Tighten and seal all siphon fittings on proportioning pump and feed
leaking in air. pumps.
The bearings are Lubricate the bearings or replace them if required. See “service the
dry or worn. bearings” on page 18.
the fluid system it may take a while for all of it to escape..
A squeaking or knocking
noise is heard.
The proportioner speeds Running out of one Check and refill material reservoirs.
up or runs erratically
material.
The cylinders are See troubleshooting techniques below to isolate the problem
worn or damaged.
cylinder(s). See “Service the cylinders” on page 16.
684025 15
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Service
4. With the bleeder type main air valve turned off (1),
Required Tools
remove the thumb screws (14) and the two guards
(15) from the sides of the proportioner.
•
•
•
•
•
•
Set of large adjustable wrenches
Set of metric sockets or wrenches
Large pipe wrench
Torque wrench
5. Disconnect the displacement pump (3) from the frame
(5) as follows:
6. Note the relative position of the pump’s fluid outlet (23)
to the frame and also note the frame location of
displacement
displacement pump must be returned to its original
position and orientation.
Rubber mallet
pump
being
removed.
Each
Flat end punch
WARNING
CAUTION
To reduce the risk of serious injury or amputation,
carefully follow all instructions listed below. In addition,
be sure that the pressure relief procedure has been
completed and that the main bleeder-type air valve has
been turned off and locked out before removing ANY
guards or covers from the proportioner.
Be sure to use two people when lifting, moving, or
disconnecting the pump. This pump is too heavy for one
person. Be sure to support the displacement pump while
it is being disconnected, to prevent it from falling and
causing injury or property damage. Do this by securely
bracing the pump, or by having at least two people hold it
while another disconnects it.
7. Using an adjustable wrench (or hammer and punch),
unscrew the coupling nut (10,11) from the rod adapter
(13). Do not lose or drop the coupling collars (12). See
Fig. 6.
Disconnecting the Displacement Pump(s)
1. Flush the System. Follow the procedure on page
11.
2. Relieve the pressure.
8. Hold the tie rod flats with a wrench to keep the rods
from turning. Unscrew the nuts (8) from the tie rods
(7). Carefully remove the displacement pump (3)
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
from the frame.
9. Refer to the separate manual supplied for
displacement pump service. Some models use two
different displacement pumps. Be sure to look at the
model number and use the appropriate manual for
service and reference.
3. Disconnect the siphon hose and the fluid outlet hose.
16 684025
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Reconnecting the Displacement Pump
CAUTION
Be sure to use an overhead hoist when lifting, moving or
disconnecting the air motor. This air motor weighs 145
lbs. and is too heavy for one person to handle. A lift ring
is provided on the motor for this purpose.
1. Make sure the coupling nut (10,11) and the coupling
collars (12) are in place on the displacement rod. See
Fig. 6.
2. Use at least two people to hold the displacement pump
while another reconnects it to the frame (see the
CAUTION in the removal procedure above).
5. Note the relative position of the air motor’s air
connection to the frame. The air motor must be
returned to its original orientation.
3. Position and orient the displacement pump (3,4) to the
frame (5) as was noted in step 6 under Disconnecting
the Displacement Pump.
6. Using an adjustable wrench (or hammer and punch),
unscrew the coupling nut (9) from the rod adapter
(13). Do not lose or drop the coupling collars (12). See
Fig. 6.
4. Position the displacement pump (3,4) on the tie rods
(7).
7. Hold the tie rod flats with a wrench to keep the rods
from turning. Unscrew the nuts (8) from the tie rods
(6). Carefully remove the air motor (2) from the frame.
5. Screw the nuts (8) onto the tie rods (7) and torque to
81–89 N.m (60–66 ft-lb).
6. Screw the coupling nut (10) onto the rod adapter (13)
loosely. Hold the rod adapter flats with a wrench to
keep it from turning. Use an adjustable wrench to
tighten the coupling nut. Torque to 196–210 N.m ft-lb).
8. Refer to the separate manual supplied for air motor
service. Be sure to look at the model number stamped
on the air motor and use the appropriate manual for
service and reference.
7. Fill the wet cup (18) 1/3 full with Graco Throat Seal
Lubricant or compatible solvent.
Reconnecting the Air Motor
8. Reconnect all hoses.
1. If the connecting rod has been removed from the Air
Motor Stud as a part of servicing, be sure to use
thread adhesive when reinstalling the connecting rod
on to the Air Motor Stud.
9. Replace the two guards (15) and the thumb screws
(14) from the sides of the proportioner.
10. Turn on the air supply. Follow the procedure for
starting the pump on page 11. Run the pump slowly at
first to ensure proper operation.
2. Make sure the coupling nut (9) and the coupling
collars (12) are in place on the rod adapter (13).
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
3. Use an overhead hoist to position the air motor on the
frame in the same orientation as noted in step 5 of
disconnecting the air motor. (see the CAUTION in the
removal procedure above).
11. Before returning the pump to production, relieve the
pressure and re-torque the packing nut (2) to 136–
149 N.m (100–110 ft-lb). The must be performed
after the pump has been cycled a number of times
4. Position the air motor (2) on the tie rods (6).
5. Screw the nuts (8) onto the tie rods (6) and torque to
81–89 N.m (60–66 ft-lb).
6. Screw the coupling nut (9) onto the rod adapter (13)
loosely. Hold the rod adapter flats with a wrench to
keep it from turning. Use an adjustable wrench to
tighten the coupling nut. Torque to 196–210 N.m ft-lb).
Disconnecting the Air Motor
1.
Relieve the pressure.
7. Reconnect the air hose
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
8. Replace the two guards (15) and the thumb screws
(14) onto the sides of the proportioner.
2. With the bleeder type main air valve turned off,
disconnect the air hose from the air motor.
9. Turn on the air supply. Follow the procedure for starting
the pump on page 11. Run the pump slowly at first to
ensure proper operation
3. Remove the thumb screws (14) and the two guards
(15) from the sides of the proportioner.
4. Disconnect the air motor (2) from the frame (5) as
follows:
684025 17
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Replacing the Bearings
1. Relieve the Pressure. Refer to Figure 6 and Figure 7.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
2. With the bleeder type main air valve (1) turned off,
remove the twenty hex bolts (16) with a 13mm wrench
or socket and then remove the four sheet metal
covers (17) from the front and back of the
proportioner. The left rear cover may contain a sensor
attached to a cable. Do not remove the sensor, but
carefully set the cover to the side without straining or
damaging the sensor or cable. The (4) four main
bearings (21) are now exposed.
8. Re-install the new bearings (21) onto the shafts.
Doing so may require slightly shifting the shaft
assembly which may have dropped during bearing
removal.
9. Re-install the four retaining washers and their snap
rings (22).
10. Replace the magnet onto the end of the left rear
bearing shaft.
11. Make sure the coupling nuts (10, 11, 12) and the
coupling collars (12) are in place on all three rod
adapters.
3. Remove the thumb screws (14) and the two guards
(15) from the sides of the proportioner.
4. Using an adjustable wrench (or hammer and punch),
unscrew the coupling nuts (10, 11, 12) from each of
the rod adapters (13) on the two displacement pumps
and the air motor. Do not lose or drop the coupling
collars (12). See Fig. 6.
12. Screw all three (3) coupling nuts (10, 11, 12) onto
the rod adapters (13) loosely. Hold each rod
adapters flats with a wrench to keep it from turning.
Use an adjustable wrench to tighten the coupling
nuts. Torque to 196–210 N.m ft-lb).
5. The left rear bearing shaft has a magnet stuck on its
end. Remove the magnet and put it in a safe place.
Use a snap ring pliers to remove the four snap rings
(22) from the shafts and remove the retaining
washers.
13. Replace the covers (17) and the bolts (16).
14. Replace the two guards (15) and the thumb screws
(14) onto the sides of the proportioner.
15. Turn on the air supply. Follow the procedure for
starting the pump on page (11). Run the pump
slowly at first to ensure proper operation.
6. You should now be able to slide the bearings (21) off
of the shaft ends.
7. Replace the bearings only with identical Graco
replacement parts. Pack the bearings in Industrial
Grade 1, Heavy Duty, Extreme Pressure, Lithium
Soap Grease, Graco Part Number 110293 or
equivalent.
Bearing Inset
Fig. 7
18 684025
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Dimensions
(A) Height.......................................... 66.0 inch 1676 mm)
(B) Length.......................................... 31.5 inch (800 mm)
(C) Width ........................................... 33.0 inch (838 mm)
(D) Air Inlet..........................................................3/4 npt(f)
(E) Fluid Inlets..............................................Two, 2” npt(f)
(G) Fluid Outlet..........................................Two 1/2” npt(f)
(H) Relief Valve Outlets...........................Two, 1/4 npt(m)
Net Weight....................................... 700 pounds (320 kg)
A
B
C
Premier Air Consumption
At 40 PSI (2.8 bar)
CFM
M3/min
At 70 PSI (4.9 bar)
CFM
At 100 PSI (7.0 bar)
CFM
At cycles
per min
M3/min
M3/min
13
25
38
50
63
75
88
100
0.36
0.71
1.07
1.42
1.78
2.13
2.49
2.84
20
40
60
0.56
1.13
1.69
2.26
2.82
3.39
3.95
4.52
26
52
78
104
130
156
183
209
0.74
1.48
2.22
2.95
3.69
4.43
5.17
5.91
5
10
15
20
25
30
35
40
80
100
120
140
160
King Air Consumption
At 40 PSI (2.8 bar)
CFM
At 70 PSI (4.9 bar)
CFM
At 100 PSI (7.0 bar)
CFM
At cycles
per min
M3/min
M3/min
M3/min
8
0.23
0.45
0.68
0.90
1.13
1.35
1.58
1.80
13
25
38
51
63
76
88
101
0.36
0.72
1.07
1.43
1.79
2.15
2.51
2.86
15
31
46
61
77
92
107
123
0.43
0.87
1.30
1.74
2.17
2.61
3.04
3.48
5
16
24
32
40
48
56
64
10
15
20
25
30
35
40
684025 19
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NOTES
20 684025
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Technical Data
Air motor effective diameter ....................................................................................Premier 12.64” (321 mm)
............................................................................................................................ King 10.00” (254 mm)
Air motor stroke...................................................................................................................... 4.75” (120 mm)
Operating air pressure range
20 to 100 psi (1.4 to 7 bar)
Recommended pump speed......................................................................... 40 cycles per minute maximum
Maximum fluid inlet pressure ....................................................................... 25% of Output or 1000 psi max.
Maximum pump operating temperature .....................................................................................180°F (82°C)
Wetted parts:
Carbon Steel Models
Primary and secondary displacement pumps ................... Carbon Steel; Chrome Steel; Alloy Steel;
Chrome, Zinc, and Nickel Plating; 550 and 17-4 PH Grades of Stainless Steel;
Ductile Iron; Tungsten Carbide; PTFEGlass-Filled PTFE;Leather
Stainless Steel Models
Primary and secondary displacement pumps ...... 316, 440 and 17-4 PH Grades of Stainless Steel;
Tungsten Carbide; PTFE; Glass-Filled PTFE; Leather
All Models
Fluid hoses................................................................................... Nylon, Zinc-plated steel couplings
Pressure relief valves..................................................... 304 Stainless Steel, Graphite-filled PTFE
Tungsten carbide (Nickel binder)
Premier Noise level at 90 psi (6.3 bar) inlet air and at 40 cpm maximum load ..........................86 dB(A)
King Noise level at 90 psi (6.3 bar) inlet air and 15 cpm maximum load................. 90.5 dB(A) Pressure
97.7 dB(A) Power
684025 21
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Graco Standard Warranty
WARRANTY
Graco warrants all equipment manufactured by it 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. As purchaser’s sole remedy for breach of this warranty, Graco will, for a period of
twelve months or two thousand hours of operation from time of sale, repair or replace any part of the
equipment proven 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, 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 with Graco equipment of
structures, accessories, equipment or materials not supplied by Graco, or the improper design,
manufacture, installation, operation or maintenance of 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 claim. 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 includes the
costs of parts, labor and transportation.
DISCLAIMERS AND LIMITATIONS
The terms of this warranty constitute purchaser’s sole and exclusive remedy and are in lieu of any other
warranties (express or implied), including warranty of merchantability or warranty of fitness for a
particular purpose, and of any non-contractual liabilities, including production liabilities, based on
negligence or strict liability. Every form of liability for direct, special or consequential damages or loss is
expressly excluded and denied. In no case shall Graco’s liability exceed the amount of the purchase
price. Any action for breach of warranty must be brought within two (2) years of the date of sale.
EQUIPMENT NOT COVERED BY GRACO WARRANTY
Graco makes no warranty, and disclaims all implied warranties of merchantability and fitness for a
particular purpose, with respect to accessories, equipment, materials, or components sold but not
manufactured by Graco. These items sold, but not manufactured by Graco (such as electric motor,
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.
Graco Information
FOR TECHNICAL ASSISTANCE, contact your Graco distributor or call one of the following numbers:
1-800-367-4023
612-623-6921
612-378-3505 Fax
Sales Offices: Minneapolis, Detroit
International Offices: Belgium, Korea, Hong Kong, Japan
GRACO INC.
P.O. BOX 1441
MINNEAPOLIS, MN
55440-1441
PRINTED IN U.S.A. 684025 Revised 06/2003
22 684025
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