INSTRUCTIONS
Rev. B
Supersedes Rev. A
and PCN B
23:1 RATIO
Monark Sprayers
2760 psi (19.0 MPa, 190 bar) Maximum Fluid Working Pressure
120 psi (0.84 MPa, 8.4 bar) Maximum Air Inlet Pressure
Part No. 236??721
Cart Mounted pump
Part No. 236??722
Pail Mounted Pump
Part No. 236??723
Wall Mount Pump
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440??1441
COPYRIGHT 1994, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
Table of Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Assembling the Sprayer . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Graco Phone Number . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to or destruction of equipment if you do not follow the corresponding instructions.
WARNING
INJECTION HAZARD
Spray from the gun, hose leaks, or ruptured components can inject fluid into your body and cause an extremely serious injury, including the need for amputation. Splashing fluid in the eyes or on the skin can also cause a serious injury.
DFluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate medi- cal attention.
DDo not point the spray gun at anyone or at any part of the body.
DDo not put hand or fingers over the spray tip.
DDo not stop or deflect fluid leaks with your hand, body, glove, or rag.
DAlways have the tip guard and 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 7 whenever you: are instructed to relieve pres- sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.
DTighten all the fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately. Permanently coupled hoses cannot be repaired; replace the entire hose.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause a serious injury or death if splashed in the eyes or on the skin, swallowed, or inhaled.
DKnow the specific hazards of the fluid you are using. Read the fluid manufacturer's warnings.
DStore hazardous fluid in an approved container. Dispose of the hazardous fluid according to all local, state, and national guidelines.
DWear appropriate protective clothing, gloves, eyewear, and respirator.
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WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result INSTRUCTIONS in a serious injury.
DThis equipment is for professional use only.
DRead all the instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are uncertain about usage, call your Graco distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck the equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. This equip- ment has a 2760 psi (19.0 MPa, 190 bar) maximum fluid working pressure at 120 psi (0.84
MPa, 8.4 bar) incoming air pressure.
DUse fluids that are compatible with the equipment wetted parts. See the Technical Data section of all the equipment manuals. Read the fluid manufacturer's warnings.
DRoute the hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose Graco hoses to temperatures above 180_F (82_C) or below ??40_F (??40_C).
DComply with all applicable local, state, and national fire, electrical, and other safety regulations.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and result in fire or explosion and serious injury.
DGround the equipment and object being sprayed. See Grounding on page 5.
DProvide fresh air ventilation avoid the buildup of flammable fumes from solvent or the fluid being sprayed.
DExtinguish all the open flames or pilot lights in the spray area.
DElectrically disconnect all the equipment in the spray area.
DKeep the spray area free of debris, including solvent, rags, and gasoline.
DDo not turn on or off any light switch in the spray area while operating or if fumes or present.
DDo not smoke in the spray area.
DDo not operate a gasoline engine in the spray area.
DIf there is any static sparking while using the equipment, stop spraying immediately. Identify and correct the problem.
308??367 3
Assembling the Sprayer
Cart Mounted Pump
Assemble the suction hose (6) to the elbow (5) at the pump intake. Screw the suction tube (7) onto the other end of the hose. See Fig. 1.
4.Screw the elbow (22) into the pump air inlet, so the female threads face down. Apply sealant to both ends of the hose (23). Connect one end to the elbow (22), then connect the other end to the swivel (24) at the pump air regulator (F).
5.Unscrew the filter bowl (T) from the top cap (U). Apply sealant to the threads of the nipple (14) and install the nipple and top cap in the pump outlet. Lubricate the threads of the filter bowl (T) and screw it into the top cap (U) tightly.
6.Mount the wall bracket 5 ft (1.5 m) above the floor. Be sure the wall is strong enough to support the weight of the pump and accessories, fluid, hoses, and stress caused during pump operation. Refer to manual 306??783 for further information.
7.Screw the suction kit swivel (13) onto the pump intake.
1 Apply thread sealant.
7
5
6
Fig. 1
?????????56
Wall Mount Pump
1.Screw the gauges (25) into the air regulators (F, G). See Fig. 2.
2.Connect the nipple (34) and bleed valve (30) to the swivel (36).
3.Install the air manifold assembly (S) to the wall bracket (7) using the two screws (29).
?????????57
Fig. 2
Pail Mounted Pump
The pail mounted pump is shipped completely as- sembled.
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Installation
Be sure that all operators read and understand this entire manual and the separate manuals supplied with components and accessories before using this equip- ment.
Reference numbers and letters in parentheses refer to the figures and parts drawings.
Accessories mentioned are available from your Graco distributor. If you supply your own accessories, be sure they area adequately sized to meet your system's requirements.
The Typical Installation shown in Fig. 4 is only an example. For assistance in designing a system to meet your particular needs, contact your Graco distributor.
System Accessories
WARNING
Two required components are supplied with your pump, to help reduce the risk of serious injury including fluid injection, splashing in the eyes or on the skin, or injury from moving parts if you are adjusting or repairing the pump.
The
(F) must be open when you close this valve.
The fluid drain valve (H) assists in relieving fluid pressure in the displacement pump, hose, and gun; triggering the gun to relieve pressure may not be sufficient.
Install an air line filter (E) in the main air line, to re- move harmful dirt and moisture from the compressed air supply. To provide automatic lubrication of the air motor, install an air line lubricator (P) downstream from the pump air regulator (F). Install a second master air valve (D) in the main air line, to isolate the accessories for servicing.
Grounding
To reduce the risk of static sparking, ground the pump, object being sprayed, and all other spray equipment used or located in the spray area. Check you local electrical code for detailed grounding instructions for your area and type of equipment. Be sure to ground all of this spray equipment.
1.Pump: loosen the grounding lug locknut (W) and washer (X). Insert one end of a 1.5 mm2 (12 ga) minimum ground wire (Y) into the slot in lug (Z) and tighten the locknut securely. See Fig. 3. Con- nect the other end of the ground wire to a true earth ground.
2.Air hoses: use only grounded air hoses.
3.Fluid hoses: use only grounded fluid hoses.
4.Air compressor: follow manufacturer's recommen- dations.
5.Spray gun: grounding is obtained through connec- tion to a properly grounded fluid hose and pump.
6.Fluid supply container: according to your 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
9.To 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 spray gun.
X
Y
Fig. 3
308??367 5
Installation
Typical Installation ??
Cart Mount Model Shown
KEY
APump
B
CAir Supply Line
DMaster Air Valve (for accessories)
EAir Line Filter
FPump Air Regulator
GGun Air Regulator
HFluid Drain Valve (required)
JFluid Suction Line
KFluid Filter
LGun Fluid Supply Hose
MGun Air Supply Hose
N
PAir Line Lubricator
RFluid Intake Elbow
YGround Wire (required; see page 5 for installation instructions)
N
M
D E
NOTE: Some components shown are included with the sprayer, depending on the model. Refer to the parts lists on pages 10??15 for parts included in your sprayer.
A
B
P
L
G
M
L 
C
K J
Fig. 4
Hose and Gun Connections
Refer to Fig. 4. Connect one end of the fluid hose (L) to the fluid filter (K) outlet and the other to the fluid inlet of the spray gun (N). Do not install the spray tip in the gun yet.
Close the
(F) is connected to the pump (A) with a hose (C).
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Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in- jected through the skin and cause serious injury. To reduce the risk of an
injury from injection, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you:
Dare instructed to relieve the pressure,
Dstop spraying,
Dcheck or service any of the system equipment,
Dor install or clean the spray tips.
1.Engage the spray gun safety latch.
2.Close the
3.Shut off the air regulators.
4.Disengage the spray gun safety latch.
5.Hold a metal part of the spray gun firmly to the side of a grounded metal pail, and trigger the spray gun to relieve pressure.
6.Engage the spray gun safety latch.
7.Open the drain valve (supplied 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.
Flush the Pump Before Using
Pumps are tested with lightweight oil which is left in to protect the pump parts. To prevent contamination of the fluid, flush the pump with a compatible solvent before using it.
WARNING
Before flushing, be sure the entire system and flushing pails are properly grounded. Refer to
Grounding on page 5. Follow the Pressure Relief Procedure at left, and remove the spray tip from the gun. Always use the lowest possible fluid pressure, and maintain firm
308??367 7
Operation
Starting and Adjusting the Pump
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
See Fig. 5. Be sure the air regulators (F, G) and bleed- type master air valve (B) are closed. Do not install the spray tip yet.
On cart mount units, place the suction tube (7) in the fluid container.
On wall mount units, screw the bung adapter (18) into the container's bung hole. Slide the suction tube assembly (J) through the bung adapter and into the container. Position the tube so the intake housing (1) is about 1/2 in. (13 mm) off the bottom of the container. Tighten the thumbscrew (26) to secure.
On pail mount units, fill the pail (46) with fluid. Set the cover (36) on the pail and secure with the latches (40).
Open the drain valve (H) to prime the pump. Open the
Slowly open the pump air regulator (F) until the pump starts. Run the pump slowly until fluid comes from the drain valve (H). Close the drain valve and continue to run the pump until all the air is pushed out of the fluid lines. Release the gun trigger and engage the safety latch; the pump will stall against the pressure.
With the pump and lines primed, and with adequate air pressure and volume supplied, the pump will start and stop as the spray gun is triggered and released.
Relieve the pressure, then install the spray tip in the gun.
Use the pump air regulator (F) to control the pump speed and fluid pressure. Always use the lowest pressure necessary to achieve the desired results. Higher pressures waste fluid and cause premature wear of the pump packings and spray tip.
Keep the packing
?? no tighter. Always relieve the pressure before adjusting the packing nut.
Never allow the pump to run dry of the fluid being pumped. A dry pump will quickly accelerate to a high speed, possibly damaging itself. If you pump acceler- ates 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 supply container and prime the pump and lines with fluid, being sure to eliminate all air from the fluid sys- tem, or flush the pump as described in Shutdown and Care, below.
Shutdown and Care
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Always relieve the pressure whenever you shut off the pump. Stop the pump at the bottom of its stroke to keep fluid from drying on the exposed displacement rod and damaging the throat packings.
Always flush the pump with a compatible solvent before fluid can dry on the displacement rod, and at the end of each day. Relieve the pressure after flushing.
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Operation
Pail Mounted Pumps
F
H
36
G
40
46
???3145A
Wall Mount Pumps
G 
B
H
18
J
26
1
Fig. 5
Cart Mounted Pumps
G
F
B
H
F
7
308??367 9
Parts
Part No. 236??721
Cart Mounted Pump
NOTE: Apply thread sealant to all male threads, except at swivel connections.
1See Detail.
17
37 (Ref)
18
19 11
1
A
28
1
2910 13 14
9
A
15
31
32
7
6
??????141
10 308??367
Parts
308??367 11
Part No. 236??722
Pail Mounted Pump
28
29
Parts
NOTE: Apply thread sealant to all male threads, except at swivel connections.
52 23
18
24
31
32
31
10
9
26
39
40
22
15
16
17
19
18
17 (Ref)
30
43
41 42
51
20
B
B
14
49
5 (Ref)
25 
6
7
13
??????144A
12 308??367
Parts
308??367 13
Parts
Part No. 236??723
Wall Mount Pump
1See Detail.
2Included with wall bracket (7).
31 29
32 19
NOTE: Apply thread sealant to all male threads, except at swivel connections.
2
22
25
23 (Ref)
A
20
36
34
2
17 21 24
30
14
17
???3143
14 308??367
Parts
Manual Change Summary
D This manual was revised to include the changes from PCN B.
308??367 15
The Graco Warranty
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
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 WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS 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 CUSTOMERS
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 r??daction du pr??sente document sera en Anglais, ainsi que tous documents, avis et proc??dures judiciaires ex??cut??s, donn??s ou intent??s ?? la suite de ou en rapport, directement ou indirectement, avec les proc??dures concern??es.
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 Toll 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. 308??367 May 1994, Revised July 1997
16 308??367