Graco Viscount High-Flo Plus 25E933 Operation manual

3A6939B
EN
Instructions - Parts List
Viscount®High-Flo®
Plus Pumps
Hydraulic-powered pumps for low pressure, high volume circulation of finishing materials.
Do not use for flushing or purging lines with caustics, acids, abrasive line strippers, and
other similar fluids. For professional use only.
See Models, page 3, for model information.
See Technical Specifications, page 19, for maximum fluid
working pressure.
Important Safety Instructions
Read all warnings and instructions in this
manual before using this equipment.
Save these instructions.
II 2 G Ex h IIB T3 Gb

Contents
23A6939B
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Flush Before Using Equipment . . . . . . . . . . . . . . 8
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 9
Prime the Pump . . . . . . . . . . . . . . . . . . . . . . . . . 9
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Preventive Maintenance Schedule . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Viscount II Pump:
Model 25Exxx with Sealed 4-Ball Plus Lower 14
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance Charts . . . . . . . . . . . . . . . . . . . . . . . . 17
Technical Specifications . . . . . . . . . . . . . . . . . . . 19
California Proposition 65 . . . . . . . . . . . . . . . . . . . 19
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 20
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 20
Related Manuals
Part No. Description
308048 Viscount II Hydraulic Motor manual
3A5348 Repair/Parts Manual, Sealed 4-Ball Plus
Lowers
311619 Pump Mounting Kits

Models
3A6939B 3
Models
Model No. Motor Lower Size Lower P/N Lower type Connection Fittings Style Lower Material Rod Coating Cylinder Coating
25E932 Viscount II 2500cc 17Z387 Sealed tri-clamp SST Ultralife™ Ultralife™
25E933 Viscount II 3000cc 17Z388 Sealed tri-clamp SST Ultralife™ Ultralife™
25E934 Viscount II 4000cc 17Z389 Sealed tri-clamp SST Ultralife™ Ultralife™

Warnings
43A6939B
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or sol-
vent flowing through the equipment can cause static sparking. To help prevent fire and explosion:
• Use equipment only in well ventilated area.
• Eliminateallignitionsources;such aspilotlights,cigarettes,portableelectriclamps,andplasticdrop
cloths (potential static sparking).
• Ground all equipment in the work area. See Grounding instructions.
• Never spray or flush solvent at high pressure.
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are anti-static or conductive.
•Stop operation immediately if static sparking occurs or you feel a shock.Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and cause
serious injury.
• Follow the Pressure Relief Procedure when you stop spraying/dispensing and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.

Warnings
3A6939B 5
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Donotexceedthemaximumworkingpressureor temperatureratingofthelowestratedsystemcom-
ponent. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request Safety Data Sheet (SDS) from distributor or retailer.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manu-
facturer’s replacement parts only.
• Donotalterormodifyequipment.Alterationsormodificationsmayvoidagencyapprovalsandcreate
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurizedequipmentcan startwithoutwarning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure and disconnect all power sources.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read Safety Data Sheet (SDS) to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
BURN HAZARD
Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.

Typical Installation
63A6939B
Key:
A Mix Tank
B Pump Stand
C Fluid Supply Line; 1-1/2 in. (38 mm) minimum diameter
D Fluid Shutoff Valve
E Fluid Line; 1 in. (25 mm) minimum diameter
F Surge Tank
GPump
J 10 Micron Return Filter
K Hydraulic Return Line
L Hydraulic Supply Line
MDrainLine
N Pressure Reducing Valve
P Hydraulic Supply Line Pressure Gauge
R Return Line Shutoff Valve
S Supply Line Shutoff Valve
T Flow Control Valve
U Fluid Drain Valve
Y Pump Ground Wire (required, see page 7 for installation)
Typical Installation
FIG. 1 Typical Installation
K
L
A
B
D
E
D
R
NRS
C
MT
Y
U
P
J
G
F

Installation
3A6939B 7
Installation
Grounding
Pump: use a ground wire and clamp (not included). See
FIG. 2 Loosen the locknut (W) of the grounding lug (Z).
Insert one end of the wire (Y) in the ground lug and
tighten the locknut securely. Connect the ground clamp
to a true earth ground. Order Part No. 237569, Ground
Wire and Clamp.
Fluid Hoses: use only electrically conductive hoses
with a maximum of 500 ft. (150 m) combined hose
length to ensure grounding continuity. Check the electri-
cal resistance of hoses. If total resistance to ground
exceeds 25 megohms, replace hose immediately.
Hydraulic power supply: follow manufacturer’s recom-
mendations.
Surge tank: use a ground wire and clamp.
Dispense valve: ground through a connection to a
properly grounded fluid hose and pump.
Fluid supply container: follow local code.
Object being sprayed: follow local code.
Solvent pails used when flushing: follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a non-conductive sur-
face, such as paper or cardboard, which interrupts
grounding continuity.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the spray gun or
valve firmly to the side of a grounded metal pail, then
trigger the gun or open the valve.
Mounting
The pump can be mounted using one of the following
options:
• Stand mount: Kit 253692
• Wall mount: Kit 255143
• Floor mount:
• Kit 19Y313—Complete kit
• Kit 19Y286—Plate for mounting to an existing
floor mount
Pump Mounting Kits manual 311619 describes the
mount parts and how to install each.
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
FIG. 2 Ground Wire
TI15854a
Z
Y
W

Installation
83A6939B
Plumbing
Install a fluid shutoff valve (D) between the mix tank (A)
and the pump.
When using a stainless steel pump, use stainless steel
plumbing to maintain a corrosion-resistant system.
Flush Before Using Equipment
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid con-
taminating your fluid with oil, flush the equipment with a
compatible solvent before using the equipment. See
Flushing the Fluid Supply Lines, page 10.
Accessories
Install the following accessories in the configuration
shown in Typical Installation, FIG. 1, using adapters as
necessary.
Hydraulic Power Supply
Be sure the power supply can provide sufficient power to
the motor. Be sure the power supply is equipped with a
suction filter to the hydraulic pump.
Hydraulic Supply Line
• Use a minimum 7/8 in. (22 mm) ID supply line (L).
The motor has a 1 in. (25.4 mm) npt(f) hydraulic oil
supply fitting.
•Supply line shutoff valve (S): isolates the motor
when servicing the system.
•Hydraulic fluid pressure gauge (P): monitors the
hydraulic oil pressure to the motor to avoid
over-pressurizing the motor or lower.
•Pressure- and temperature-compensated flow
control valve (T): prevents the motor from running
too fast, which can damage it. Pressure reducing
valve (N), which has a drain line (M) running to
the hydraulic return line (K): controls the hydraulic
pressure to the motor.
Hydraulic Return Line
• Use a minimum 1/2 in. (13 mm) ID return line (K).
The motor has a 3/4 in. (19 mm) npt (f) hydraulic oil
return fitting.
•Return line shutoff valve (R): isolates the motor
when servicing the system.
•Return fluid filter (J): removes residue from the
hydraulic fluid to help keep the system running
smoothly (10 micron size).
Fluid Line
For typical installation, see FIG. 1.
•Fluid filter: with a 60 mesh (250 micron) stainless
steel element to filter particles from the fluid as it
leaves the pump.
•Fluid drain valve (U): required in your system, to
relieve fluid pressure in the hose and gun.
•Fluid shutoff valve (D): shuts off fluid flow.
NOTICE
To prevent a bellows failure:
• Do not exceed fluid inlet pressure of 15 psi (0.1
MPa, 1.0 bar)
• Do not use a ball check pump on the inlet side of
this pump
• Do not use a suction tube with a check valve on
the inlet side of this pump.
NOTICE
The hydraulic power supply must be kept clean at all
times to avoid damage to the motor and hydraulic
power supply. To help keep the power supply clean:
• Blow out hydraulic lines with air and flush thor-
oughly before connection to the motor.
• Plug hydraulic inlets, outlets, and line ends when
disconnecting them for any reason.
NOTICE
To avoid damage to the pump, never use the return
line shutoff valve to control the hydraulic flow. Do not
install any flow control devices on the hydraulic return
line.

Operation
3A6939B 9
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure when-
ever you see this symbol.
1. Shut off the hydraulic supply line shutoff valve (S)
first, then the return line shutoff valve (R).
2. Open the dispensing valve, if used.
3. Open all fluid drain valves (U) in the system, having
a waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to pump
again.
Prime the Pump
NOTE: Sealed 4-ball lowers with bellows do not require
Throat Seal Liquid (TSL).
1. Close the flow control valve (T) by turning knob
counterclockwise, reducing pressure to zero. Close
the supply line shutoff valve (S) and the return line
shutoff valve (R). Also verify that all drain valves (U)
are closed.
2. Check that all fittings throughout system are tight-
ened securely.
3. Start the hydraulic power supply.
4. Open the return line shutoff valve (R), then the sup-
ply line shutoff valve (S). Slowly turn the flow control
valve (T) clockwise, increasing pressure until pump
starts.
5. Cycle pump slowly until all air is pushed out and
pump and hoses are fully primed.
6. Close the fluid shutoff valve (D) downstream of the
pump. The pump should stall against pressure.
NOTE: In a circulation system, the pump operates con-
tinuously until the power supply is shut off. In a
direct-supply system, the pump starts when the dis-
pense valve is opened, and stops when the dispense
valve is closed.
Shutdown
Follow the Pressure Relief Procedure, page 9.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
splashing fluid and moving parts, follow the Pressure
Relief Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
NOTICE
When shutting down the hydraulic system, always
shut off the hydraulic supply line shutoff valve (S) first,
and then the return line shutoff valve (R) to prevent
over pressurizing the motor or its seals. When starting
the hydraulic system, open the return line shutoff
valve first.
NOTICE
Do not allow the pump to run quickly for a long period
of time as this may damage the packings.

Maintenance
10 3A6939B
Maintenance
Preventive Maintenance
Schedule
The operating conditions of your particular system
determine how often maintenance is required. Establish
a preventive maintenance schedule by recording when
and what kind of maintenance is needed, and then
determine a regular schedule for checking your system.
Your schedule should include the maintenance activities
described in the following sections.
Flushing the Fluid Supply Lines
• Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
• Flush at the lowest pressure possible. Check con-
nectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
Checking the Mix Tank Volume
Checking the Hydraulic Power Supply
Carefully follow the hydraulic power supply manufac-
turer's recommendations on reservoir and filter cleaning,
and periodic changes of hydraulic fluid.
Performing a Stall Test
Perform a stall test periodically to ensure the piston seal
is in good working condition and to prevent system pres-
surization:
Close the fluid shutoff valve (D) closest to the pump on
the down stroke and be sure that the pump stalls. Open
the fluid shutoff valve to restart the pump. Close the fluid
shutoff valve (D) closest to the pump on the upstroke
and be sure that the pump stalls.
Stop the pump on the down stroke, before the air motor
changes over.
To avoid fire and explosion, always ground equipment
and waste container. To avoid static sparking and
injury from splashing, always flush at the lowest pos-
sible pressure.
NOTICE
Don't let the mix tank run dry. When the tank is empty,
the pump demands more power as it tries to suck in
some fluid. This causes the pump to run too fast,
which can seriously damage the pump.
NOTICE
Do not allow the pump to run quickly for a long period
of time as this may damage the seals.