Graco Monark 218794 Operation manual

307653
Rev. F
06114
Model 218763
Shown
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
1.5:1 Ratio MonarkrPump
180 psi (12 bar) Maximum Fluid Working Pressure
120 psi (8 bar) Maximum Air Input Pressure
Part No. 218794, Series C
Stainless Steel, 55 Gallon (200 Liter) Drum Size, UHMWPE and Leather Packed
Part No. 218763, Series C
Stainless Steel, Stubby Size, UHMWPE and Leather Packed
Table of Contents
Warnings 2......................................
Installation 5.....................................
Operation 8.....................................
Maintenance 11..................................
Troubleshooting 12...............................
Service 13......................................
Parts 14........................................
Dimensions 18...................................
Mounting Hole Layout 18..........................
Technical Data 19................................
Graco Warranty 20...............................
Toll-Free Graco Phone Number 20.................
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440--1441
ECOPYRIGHT 1985, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

2 307653
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 not sure, call your Graco distributor.
DDo not alter or modify this equipment.
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 page 19 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 1,1,1--trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in aluminum equipment. Such use could result in a serious chemical
reaction, with the possibility of explosion.
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.

307653 3
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 5.
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.
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 8 to prevent the
equipment from starting unexpectedly.

4 307653
Notes

307653 5
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. If you
supply your own accessories, be sure they are ade-
quately sized and pressure rated for your system.
Fig. 2 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.
Prepare the Operator
All persons who operate the equipment must be
trained in the safe, efficient operation of all system
components as well as the proper handling of all fluids.
All operators must thoroughly read all instruction
manuals, tags, and labels before operating the equip-
ment.
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 3.
1. Pump: order Part No. 237569 Ground Wire and
Clamp. See Fig. 1. Loosen the grounding lug
locknut (W) and washer (X). Insert one end of the
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.
Fig. 1
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 proper-
ly 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.
Mounting the Pump
Mount the pump to suit the type of installation planned.
The pump dimensions and mounting hole layout are
shown on page 18.
If the pump is immersed, be sure the pump intake is
1/2 in. (13 mm) off the bottom of the fluid container.
If the pump is mounted on the wall or on a stand,
connect a suction line to the pump’s 1--1/2” npt(f) fluid
inlet and place the other end of the line in the fluid
container.

6 307653
Installation
Fig. 2
06089
K
EY
ABleed-Type Master Air Valve
(required, for pump)
BAir Filter/Regulator
CAir Line Lubricator
DFluid Drain Valve (required)
ESurge Tank
FFluid Shutoff Valves
GFluid Filter
HFluid Pressure Regulator
JAir Spray Gun
KBack Pressure Regulator
LPump
MAir Supply Line
NBleed-Type Master Air Valves
(for accessories)
PMain Fluid Supply Line
RPump Runaway Valve
SMain Fluid Return Line
TSecondary Fluid Return Line
YGround Wire (required;
see page 5 for installation
instructions)
A
B
D
EFG
H
J
K
M
N
P
R
S
T
Y
B
C
F
F
F
F
F
K
L
M
M
N

307653 7
Installation
Available Accessories (must be
purchased separately)
Air Line Accessories
WARNING
A bleed-type master air valve (A) is required in your
system to help reduce the risk of serious injury,
including splashing of fluid in the eyes or on the
skin, and injury from moving parts if you are adjust-
ing 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.
DThe bleed-type master air valve (A) 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
easily accessible from the pump, and is located
downstream from the air filter/regulator (B). Order
Part No. 113269 Bleed Valve.
DThe air filter/regulator (B) controls pump speed
and outlet pressure by adjusting the air pressure to
the pump and the air spray gun. It also removes
harmful dirt and moisture from the compressed air
supply. Locate the pump air filter/regulator up-
stream from the pump’s bleed-type master air
valve (A). Also, supply an air filter/regulator at each
spray booth.
DA pump runaway valve (R) automatically shuts off
the pump if it starts running too fast. A pump which
runs too fast can be seriously damaged.
DAn air line lubricator (C) provides automatic air
motor lubrication. Install downstream from the
pump air filter/regulator (B).
DInstall additional air bleed valves (N) at each air
line drop, to isolate accessories for servicing.
Fluid Line Accessories
WARNING
A fluid drain valve (D) is required in your system to
help reduce the risk of serious injury, including
splashing of fluid in the eyes or on the skin.
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.
DThe fluid drain valve (D) is required in your sys-
tem to relieve fluid pressure in the hose and gun
(see the WARNING above).
DInstall a surge tank (E) to reduce fluid line pulsa-
tions.
DInstall two fluid filters (G) to remove impurities
from the fluid before it reaches the spray gun (J).
Install fluid shutoff valves (F) upstream and down-
stream from each filter; this arrangement enables
you to continue spraying while cleaning a filter.
DInstall a fluid pressure regulator (H) to provide
precise fluid pressure control at each spray booth.
DInstall fluid shutoff valves (F) where shown.
Fluid Return Line
DInstall a main fluid return line (S) to circulate fluid
back to the pump’s return port.
DInstall a secondary fluid return line (T) to circu-
late fluid from the spray guns back to the fluid
supply container.
DInstall a back pressure regulator (K) on each
fluid return line, after the last gun station, to provide
constant system back pressure for all spray guns
and proper pressure for fluid circulation.

8 307653
Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to
prevent the system from starting or spraying acci-
dentally. To reduce the risk of an injury from acci-
dental spray from the gun, splashing fluid, or
moving parts, follow the Pressure Relief Proce-
dure whenever you:
Dareinstructedtorelievethepressure,
Dstop spraying,
Dcheck or service any of the system equipment,
Dor install or clean the spray nozzle.
1. Shut off the air supply to the pump.
2. Close the bleed-type master air valve (A, required
in your system).
3. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
4. Open the drain valve (D, required in your system),
having a container ready to catch the drainage.
5. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray nozzle or hose is com-
pletely clogged, or that pressure has not been fully
relieved after following the steps above, very slowly
loosen the nozzle retaining ring or hose end coupling
and relieve pressure gradually, then loosen completely.
Now clear the nozzle or hose.
Packing Nut
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure above.
Check the tightness of the packing nut/wet-cup (U)
periodically. The nut should be tight enough to prevent
leakage. Torque the nut to 20--24 ft-lb (27--33 N.m); do
not overtighten or you may damage the packings.
Relieve pressure before adjusting the nut. See Fig. 3.
If the pump is not immersed, fill the packing nut/wet-
cup 1/2 full with a compatible solvent. Keep the cup
filled at all times to help prevent the fluid you are
pumping from drying on the exposed displacement rod
and damaging the throat packings.
Flush the Pump Before First Use
The pump is tested with lightweight oil, which is left in
to protect the pump parts. If the fluid you are using
may be contaminated by the oil, flush it out with a
compatible solvent. See Flushing on page 11.
06114
Fig. 3
U
Model 218763
Shown

307653 9
Operation
Prime the Pump
1. See Fig. 2. Remove the spray nozzle from the
gun. See the gun instruction manual.
2. Close all bleed-type air valves (A, N).
3. Close the pump air filter/regulator (B).
4. Close the fluid drain valve (D).
5. Check that all fittings throughout the system are
tightened securely.
6. Connect the air supply line to the pump air inlet.
7. Open the bleed-type air valves (A, N).
8. Hold a metal part of the gun firmly to the side of a
grounded metal pail and hold the trigger open.
9. Open the air filter/regulator (B) until the pump
starts. Run the pump slowly until all air is pushed
out and the system is fully primed. Always use the
lowest pressure necessary to get the desired
results. Higher pressures cause premature tip and
pump wear.
10. Release the gun trigger and lock the trigger safety.
In a circulating system, the pump will run continu-
ously and slow down or speed up on demand, until
the air supply is shut off.
In a direct supply system, with adequate air pres-
sure supplied to the motor, the pump will start and
stop as you open and close the gun.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
11. Relieve the pressure. Install the spray nozzle in
the gun, as explained in the gun manual.
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of overpressurizing
your system, which could cause compo-
nent rupture and serious injury, never
exceed 120 psi (8 bar) air supply pressure to the
pump.
12. Use the air filter/regulator (B) to control pump
outlet pressure and pump speed. Always use the
lowest pressure necessary to get the desired
results. Higher pressure causes premature pump
wear.
CAUTION
Do not allow the pump to run dry. It will quickly
accelerate to a high speed, causing damage. If your
pump is running too fast, stop it immediately and
check the fluid supply. If the container is empty and
air has been pumped into the lines, refill the con-
tainer and prime the pump and the lines, or flush and
leave it filled with a compatible solvent. Eliminate all
air from the fluid system.

10 307653
Notes