Graco Series B Operation manual

307–159
Rev. K
Supersedes Rev. J
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
Viscount II 4500 Pump
1500 psi (100 bar, 10 MPa) Maximum Hydraulic Input Pressure
4500 psi (310 bar, 31 MPa) Maximum Working Pressure
Model 221–066, Series B
With Severe-Duty Displacement Pump*
and Quiet Hydraulic Motor
* Severe-Duty displacement pumps have an abrasion
and corrosion-resistant displacement rod and cylinder.
Refer to the T echnical Data section of the separate pump
manual for “W etted Parts” information.

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1975, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

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Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting holes 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Charts 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
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
instructions.
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury .
D
This equipment is for professional use only .
D
Read all instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor .
D
Do not alter or modify this equipment.
D Check equipment daily . Repair or replace worn or damaged parts immediately .
D
Do not exceed the maximum working pressure stated on the equipment or in the T echnical Data
for your equipment. Do not exceed the maximum working pressure of the lowest rated component
in your system.
D Use 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.
D Handle hoses carefully . Do not pull on hoses to move equipment.
D Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 66 _ C (150 _ F) or below –40 _ C (–40 _F).
DW
ear hearing protection when operating this equipment.
D Do not move or lift pressurized equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.

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WARNING
INJECTION HAZARD
Spray from the gun/valve, leaks or ruptured components can inject fluid into your body and cause ex -
tremely serious injury , including the need for amputation. Fluid splashed 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 medi -
cal attention.
 Do not point the gun/valve at anyone or at any part of the body .
 Do not put your hand or fingers over the spray tip/valve nozzle.
 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 gun/valve when spraying/dispensing.
 Be sure the gun/valve trigger safety operates before spraying/dispensing.
 Lock the gun/valve trigger safety when you stop spraying/dispensing.
 Follow the Pressure Relief Procedure on page 8 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
T ighten all fluid connections before operating the equipment.
 Check the hoses, tubes, and couplings daily . Replace worn, damaged, or loose parts immediately .
Permanently coupled hoses cannot be repaired; replace the entire hose.
MOVING P ARTS HAZARD
Moving parts can pinch or amputate your fingers.
 Keep clear of all moving parts when starting or operating the pump.
 Before checking or servicing the equipment, follow the Pressure Relief Procedure on page 8 to
prevent the equipment from starting unexpectedly .

4 307-159
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and re -
sult in a fire or explosion and serious injury .
 Ground the equipment and the object being sprayed. Refer to Grounding on page 5.
 If there is any static sparking or you feel an electric shock while using this equipment, stop spray-
ing/dispensing immediately . Do not use the equipment until you identify and correct the problem.
 Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed/dispensed.
 Keep the spray/dispense area free of debris, including solvent, rags, and gasoline.
 Before operating this equipment, electrically disconnect all equipment in the spray/dispense area.
 Before operating this equipment, extinguish all open flames or pilot lights in the spray/dispense
area.

Do not smoke in the spray/dispense area.
 Do not turn on or of f any light switch in the spray/dispense area while spraying/dispensing or while
operating if fumes are present.
 Do not operate a gasoline engine in the spray/dispense 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.
 Know the specific hazards of the fluid you are using.
 Store hazardous fluid in an approved container . Dispose of hazardous fluid according to all local,
state and national guidelines.
 Always wear protective eyewear , gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer .

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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 .
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below . Also read
the section FIRE OR EXPLOSION HAZ -
ARD
on page 4.
1. Pump: use a ground wire and clamp as shown in
Fig. 1. Loosen the grounding lug locknut (W) and
washer (X). Insert one end of a 12 ga (1.5 mm )
minimum ground wire (Y) into the slot in lug (Z)
and tighten the locknut securely . Connect the other
end of the wire to a true earth ground. Order part
number 222–01 1 Grounding Clamp and Wire.
2. Fluid and hydraulic hoses: use only grounded
hoses with a maximum of 500 ft (150 m) combined
hose length to ensure grounding continuity .
3. Hydraulic Power Supply: according to manufactur -
er’
s recommendations.
4. Spray gun: ground through connection to a prop -
erly grounded fluid hose and sprayer .
5.
Object being sprayed: follow your local code.
6. Fluid supply container: 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.
T o 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.
Fig. 1
Y
W
Z
X
06431

6 307-159
Installation
Fig. 2
06639
Key
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
Fluid
Hose to Gun
Fluid Drain V alve
Suction Hose
Hydraulic Return Line
Hydraulic Return Line Shutof f V alve
Pressure Gauge
Flow Control V alve
Pressure Reducing Valve
Accumulator
Drain Line (from pressure reducing valve)
Hydraulic Supply Line
Hydraulic Power Supply
Ground Wire
Wet-Cup
Drain Line (from motor drip pan)
Check Valve
Hydraulic Supply Line Shutof f V alve
Return Line Filter
C
E
N
FH J
K
L
D
M
A
B
R
Q
P
T
G
S
Mount
the pump to suit the type of installation planned.
Pump dimensions and mounting hole layout are shown
on page 14.
CAUTION
It is very important to keep the hydraulic supply
system clean at all times. Be sure that all hydraulic
fluid lines are absolutely clean. Blow out the lines
with air and flush thoroughly with solvent before
connecting to the hydraulic motor to avoid introduc -
ing harmful contaminants into the motor .
Filters
Be sure that your hydraulic power supply is equipped
with a suction filter to the hydraulic pump and a system
return line filter of 10 micron size.
Carefully follow the manufacturer ’ s recommendations
on reservoir and filter cleaning, and periodic changes
of hydraulic fluid. Use only Graco-approved hydraulic
oil.

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Installation
Hydraulic Lines
The motor has a 3/4 npt(f) hydraulic oil supply fitting,
and a 1” npt(f) hydraulic oil return fitting. Usa a mini -
mum 1/2 in. ID hydraulic supply line and a minimum
7/8 in. ID, return line.
On the hydraulic supply side (C), install the following
accessories shown in Fig. 2, using adapters as neces -
sary.
DA shutoff valve (E)
isolates the pump for service.
DA fluid pressure gauge (F) to monitor hydraulic oil
pressure to the motor and to avoid overpressurizing
the motor or displacement pump, and a pressure-
and temperature-compensated flow control
valve (G) to prevent the motor from running too
fast and possibly damaging itself.
D A pressure reducing valve (H), with a drain
line (K) running directly to the hydraulic return
line (D).
D An accumulator (J) to reduce the hammering
ef fect caused by the motor reversing direction.
DA shutoff valve (E) isolates the pump for service.
CAUTION
Do not exceed 10 gpm (37.8 liter/minute) volume to
avoid pump stalling.
Operating Temperature
Keep the hydraulic oil temperature below 130 _F
(54_
C) for maximum pump performance.
Drip Pan
The hydraulic motor is equipped with a drip pan to
collect any leakage that might occur . Connect a 1/4 in.
ID drain hose (Q) to the barbed hose fitting on the drip
pan.
Drain V alve
Install a high pressure fluid drain valve (B) near the
pump outlet to relieve fluid pressure in the displace -
ment pump and hose during shutdown. See Fig. 2.
WARNING
The fluid drain valve (B) is required in your system
to help reduce the risk of serious injury , including
fluid injection and splashing in the eyes or on the
skin if you are adjusting or repairing any part of the
system. T riggering the gun to relieve pressure may
not be suf ficient.
Fluid Lines
Connect a grounded fluid supply line to the 1 in. npt
fluid outlet on the displacement pump.
Attach a suction nose to the 1–1/2 in. npt pump fluid
intake.

8 307-159
Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in -
jected through the skin and cause seri -
ous injury . T o reduce the risk of an injury
from injection, splashing fluid, or moving parts, fol -
low the Pressure Relief Procedure whenever you:
 are instructed to relieve the pressure,
 stop spraying/dispensing,
 check or service any of the system equipment,
 or install or clean the spray tips/nozzles.
1. Lock the spray gun or dispensing valve trigger
safety latch and any other equipment safety
latches.
2.
Shut of f the power supply to the hydraulic motor .
3.
Unlock the gun/valve trigger safety , and trigger the
gun into a grounded metal waste container , holding
a metal part of the gun firmly to the side of the
container until pressure is relieved.
4. Lock the trigger safety .
5.
Open all system drain valves, having a container
ready to catch the drainage.
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.
Hydraulic Fluid
Check the hydraulic fluid level, and add fluid as neces -
sary to the fill lines before each use.
Wet-Cup
If the pump is not immersed, fill the displacement
pump wet-cup (P) 1/3 full of Graco Throat Seal Liquid
(TSL) or compatible solvent to prevent fluid from drying
on the displacement rod and damaging the pump
packings. See Fig. 2.
Flushing
Flush the pump before using it for the first time to
remove the light oil which was left in after factory
testing to protect the pump from corrosion. Be sure the
solvent used is compatible with the fluid to be sprayed
and the pump wetted parts shown (see manual
307–728). Flush until clean solvent comes from the
gun, or in a circulating system, flush long enough to
clean the entire system.
WARNING
Be sure the entire system and flushing pails are
properly grounded before flushing. Always use the
lowest possible fluid pressure, and maintain firm
metal to metal contact between the gun and pail to
reduce the risk of static sparking and splashing.
See page 5.

9307-159
Operation
WARNING
COMPONENT RUPTURE HAZARD
T o reduce the risk of overpressurizing
your system, which could cause compo -
nent rupture and serious injury , never
exceed the specified Maximum Incoming Air Pres -
sure to the pump (see the T echnical Data on
page 15).
T o prevent overpressurizing the hydraulic motor or
its seals, always shut of f the supply line valve (S)
first , then shut of f the return line valve (E).
Pump Operation
To operate the pump, turn on the hydraulic power
supply . Open the return line shutof f valve first, then
slowly open the hydraulic supply shutof f valve. Use the
lowest possible pressure to obtain the desired results.
Higher pressures will increase tip wear and pump
wear.
In a direct supply system, the pump will start when the
gun or valve is opened, and stall when it is closed. In a
circulating system, the pump will operate continuously
until the hydraulic power supply is turned of f.
WARNING
T o reduce the risk of overpressurizing the pump,
which can cause a rupture, fire or explosion and
result in serious injury including fluid injection,
always follow these precautions.
Never exceed 1500 psi (100 bar , 10 MPa), or 3.3
gpm (12.5 liter/min) hydraulic input to the motor .
Never exceed 4500 psi (310 bar , 3.1 MPa) maxi -
mum pump outlet pressure.
CAUTION
Do not allow the hydraulic oil temperature to exceed
130F (54 C). The pump seals will wear faster and
leakage may occur if the pump is operated at higher
oil temperatures.

 
Maintenance
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Keep the wet-cup (P) 1/3 filled with Graco Throat Seal
Liquid (TSL)
Check the tightness of the packing nut weekly . Before
adjusting, relieve the pressure . The packing nut
should be tight enough to stop leakage, but no tighter .
Overtightening will compress and damage the pack -
ings and result in pump leaking. Place a pin in one of
the holes of the packing nut to adjust it.
Carefully monitor the fluid supply . If the pump empties
the supply container , air will be drawn into the pump,
causing it to run too fast and to be damaged. If the
pump runs too fast, shut it of f immediately. Fill the
supply container and prime the pump and hoses to
remove all air , or flush the pump and hoses with a
compatible solvent and leave it filled with an oil-base
solvent or mineral spirits.
Always flush the pump before the fluid can dry in it.
Always stop the pump at the bottom of its stroke to
prevent the fluid from drying on the displacement rod.
Corrosion Protection for Carbon Steel
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
CAUTION
Water , or even moist air , can cause your pump to
corrode. T o help prevent corrosion, never leave the
pump filled with water or air . After normal flushing,
flush the pump again with mineral spirits or oil-based
solvent, relieve the pressure , and leave the mineral
spirits in the pump.