Graco Viscount II Operation manual

307158ZAP
EN
Instructions – Parts List
Viscount® II
Hydraulic Motor
Reciprocating hydraulic motor for use with Graco high-performance coating pumps. For
professional use only.
See page 3 for model information, including maximum hydraulic fluid input pressure.
Important Safety Instructions
Read all warnings and instructions in this manual
before using the equipment. Save these
instructions.
Model 235345
Series B
Model 235435
Series C

2 307158ZAP
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Disassembly (Refer to Fig. 3) . . . . . . . . . . . . . . . 8
Reassembly (Refer to Fig. 4) . . . . . . . . . . . . . . . 11
Parts - Square Housings . . . . . . . . . . . . . . . . . . . . 13
Model 217022, Series E . . . . . . . . . . . . . . . . . . 14
Model 217338, Series F . . . . . . . . . . . . . . . . . . 16
Model 235345, Series B . . . . . . . . . . . . . . . . . . 17
Model 262818, Series B . . . . . . . . . . . . . . . . . . 20
Model 24W139, Series B . . . . . . . . . . . . . . . . . 20
Parts - Cylindrical Housings . . . . . . . . . . . . . . . . . 21
Model 217338, Series G . . . . . . . . . . . . . . . . . . 22
Model 235345, Series C . . . . . . . . . . . . . . . . . . 24
Model 262818, Series C . . . . . . . . . . . . . . . . . . 26
Model 24W139, Series C . . . . . . . . . . . . . . . . . 26
Mounting Hole Layout . . . . . . . . . . . . . . . . . . . . . . 27
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
California Proposition 65 . . . . . . . . . . . . . . . . . . . 28
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 30

Models
307158ZAP 3
Models
Square Housings
Cylindrical Housings
IMPORTANT
The design of the Viscount II hydraulic pump upper and lower motor housings has been updated. The cylindrical
design replaces the square housing design previously used. There is no performance change associated with this
update. If replacement of a square housing is necessary, both the upper and lower housings must be converted
to the cylindrical design as it is not backwards compatible.
If replacement housing 16F140 is needed, you must order replacement housing kit 20B232 to upgrade system to
cylindrical housings design.
All instructions in this manual apply to both the square and cylindrical series of models, unless otherwise noted.
Model Series
Maximum Hydraulic
Fluid Input Pressure Description
217022 E 1500 psi (10 MPa, 103
bar)
Replacement motor for GH533, GH733,
and GH833 Sprayers
217338 F 1500 psi (10 MPa, 103
bar)
Replacement motor for Viscount® II Plural
Component Pump
235345 B 1500 psi (10 MPa, 103
bar)
Viscount® II Motor, Interchanges with
King® Air Motor
262818 B 1800 psi (12 MPa, 124
bar)
Replacement motor for XP and Xtreme
Sprayer, Interchanges with NXT 6500 NXT
Air Motor and 8-in. tie rod diameter lowers
24W139 B 1900 psi (13.1 MPa, 131
bar)
Hydraulic motor for Hydra-Clean®
Sprayers, Interchanges with NXT 6500
NXT Air Motor and 8-in. tie rod diameter
lowers
Model Series
Maximum Hydraulic
Fluid Input Pressure Description
217338 G 1500 psi (10 MPa, 103
bar)
Replacement motor for Viscount II Plural
Component Pump
235345 C 1500 psi (10 MPa, 103
bar)
Viscount II Motor, Interchanges with King
Air Motor
262818 C 1800 psi (12 MPa, 124
bar)
Replacement motor for XP and Xtreme
Sprayer, Interchanges with NXT 6500 NXT
Air Motor and 8-in. tie rod diameters
lowers.
24W139 C 1900 psi (13.1 MPa, 131
bar)
Hydraulic motor for Hydra-Clean Sprayers,
Interchanges with NXT 6500 NXT Air Motor
and 8-in. tie rod diameter lowers.

Warnings
4 307158ZAP
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation 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.
WARNING
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.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Do not leave the work area while equipment is energized or under pressure.
• 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
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and
create 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.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like
just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
• Use only Graco approved hoses. Do not remove any spring guard that is used to help protect the
hose from rupture caused by kinks or bends near couplings.

Warnings
307158ZAP 5
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.
• Equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or
solvent flowing through the equipment can cause static sparking. To help prevent fire and explosion:
• Use equipment only in well-ventilated area.
• Eliminate all ignition sources, such as pilot lights, cigarettes, portable electric lamps, and plastic
drop 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.
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 Sheets (SDSs) 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.
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.
WARNING

Installation
6 307158ZAP
Installation
Maximum Hydraulic Input Pressure
The maximum safe hydraulic input pressure to this
motor depends on the lower displacement pump to
which it is connected.
With Graco Displacement Pump Models 207474,
207655, 210208, 217527, 217339, 222796, 222801,
222803, 222805, 222810, and 222811, use a
maximum of 1500 psi (10 MPa, 103 bar) hydraulic
input pressure.
For Graco Displacement Pump Models 24B923 and
687055, usa a maximum of 1900 psi (13.1 MPa, 131
bar) hydraulic input pressure.
Never exceed 1000 psi (7 MPa, 70 bar) hydraulic
input pressure with the motor connected to any
displacement pump other than those listed above;
serious injury or damage to the equipment may
result.
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Be sure you always shut off the supply line shutoff
valve (E) first, and then the return line shutoff valve.
This is to prevent overpressurizing the motor or its
seals. When starting up the hydraulic system, open
the return line shutoff valve first.
NOTICE
Keep the hydraulic system clean
To reduce the risk of damaging the hydraulic power
supply, blow out all hydraulic lines with air, flush
thoroughly with solvent, and then blow out with air
again before connecting the lines to the motor.
Always plug the hydraulic inlets, outlets and lines when
disconnecting them to avoid introducing dirt and other
contaminants into the system.
Carefully follow the manufacturer’s recommendations
on reservoir and filter cleaning, and periodic changes
of hydraulic fluid.
Recommended Hydraulic Oil
Use Graco-approved Hydraulic Oil, Part No. 169236 (5
gal) or 207428 (1 gal)) or a premium, ISO grade 46
petroleum-based hydraulic oil containing rust and
oxidation inhibitors and anti-wear agents.
Before using any other type of oil in this motor, contact
your Graco distributor. Unauthorized use of lesser
grade oil or substitutes may void the warranty.
Hydraulic Oil Working Temperature
Models 217022 and 217338
The recommended hydraulic oil operating temperature
is 80 - 115° F (27 - 45° C). The motor seals will wear
faster and leakage may occur if the pump is operated
at higher oil temperatures.
If the hydraulic oil temperature approaches 130° F (54°
C), check the hydraulic fluid supply cooling system,
filters, etc. and clean or repair as needed.
Models 235435, 262818, and 24W139
The recommended hydraulic oil operating temperature
is 80 - 160° F (27 - 71° C). The motor seals will wear
faster and leakage may occur if the pump is operated
at higher oil temperatures.
If the hydraulic oil temperature approaches 180° F (82°
C), check the hydraulic fluid supply cooling system,
filters, etc. and clean or repair as needed.

Installation
307158ZAP 7
Refer to the complete pump manual for detailed
installation information or contact your Graco
distributor.
NOTE: A 1 in. npt seal (57) is supplied in a plastic bag
with the motor. Thread the seal onto the threads of your
hydraulic return line fitting (A). Thread the fitting into the
upper housing (40) and torque as needed. Then tighten
the seal (57) against the motor to provide a secure seal.
See Fig. 1.
FIG. 1 ___________________________________________
Grounding
Proper grounding is an essential part of maintaining a
safe system.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Be
sure to ground all of this equipment:
•Pump: use a ground wire and clamp as shown to
the right.
•Hydraulic hoses and fluid outlet hoses: use only
electrically conductive hoses.
•Hydraulic power supply and air compressor:
follow manufacturer’s recommendations.
•Spray gun: obtain grounding through connection
to a properly grounded fluid hose and pump.
•Fluid supply container: according to local code.
•Object being sprayed: according to local code.
•Any pails used when flushing: Use only metal,
grounded pails when flushing. Make firm
metal-to-metal contact between the metal part of
the spray gun and the pail. Use the lowest possible
pressure.
• To maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the
gun firmly to the side of a grounded metal pail, and
then trigger the spray gun.
Models 217338, 235345, and 262818
Remove the ground screw (B) and insert through the
eye of the ring terminal at the end of the ground wire
(A). Fasten the ground screw onto the pump and tighten
securely. See Fig. 2. Connect the other end of the wire
to a true earth ground. To order a ground wire and
clamp, order part number 222011.
Model 24W139
Remove the ground screw (B) and insert through the
eye of the ring terminal at the end of the ground wire
(A). Fasten the ground screw onto the pump and tighten
securely. See Fig. 2. Connect the other end of the wire
to a true earth ground. To order a ground wire and
clamp, order part number 26B091.
Model 217022
The ground wire and clamp are supplied with your GH
Sprayer. Connect the clamp to a true earth ground as
recommended by your local code.
FIG. 2 ___________________________________________
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.
57
40
A
04467
A
B

Service
8 307158ZAP
Service
Pressure Relief Procedure
1. Lock the gun trigger safety.
2. Shut off the hydraulic power supply.
3. Close the supply line shutoff valve, and then the
return line shutoff valve.
4. Unlock the gun trigger safety.
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
6. Lock the gun trigger safety.
7. Open the drain valve (required 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 obstruction.
Before you start:
Be sure you have all necessary parts on hand.
1. Repair Kit 220457 is available for Models 217338.
Repair Kit 223654 is available for Models 235345,
262818, and 24W139.
Repair Kit 18B078 is available for Model 217022.
2. The repair kits must be purchased separately. An
asterisk behind a reference number in the parts list,
for example (25*), indicates that the part is included
in the repair kit.
3. Clean all parts as you disassemble them and
inspect them for wear or damage. Replace parts as
necessary.
Disassembly (Refer to Fig. 3)
NOTE: Use all the replacement parts that are in the
repair kit.
1. Flush the displacement pump if possible.
2. Relieve the pressure.
3. Stop the pump at the bottom of its stroke.
4. Disconnect the displacement pump hoses.
Disconnect the hydraulic hoses and plug all
hydraulic connections and lines to prevent
contamination.
5. Disconnect the displacement pump from the motor,
as explained in your separate pump manual.
6. Place the hydraulic motor in a bench vise.
7. Push or lightly tap the piston (49a) up as far as
possible.
NOTE: The tie rod nuts (3), socket screws (8), cap
screws (24), and retainer (49b) are fastened with
Loctite® TL--242. Heat may be used sparingly to soften
adhesive sealant during disassembly.
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, splashing
fluid, or moving parts, follow the Pressure Relief
Procedure whenever you:
• are instructed to relieve the pressure,
• stop spraying,
• check or service any of the system equipment,
• or install or clean the spray tip.
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
NOTICE
Avoid getting dust or dirt in the motor during service.
Cleanliness is essential when repairing a hydraulic
motor. Foreign particles like dust or dirt in the
hydraulic fluid can increase friction between moving
parts and increase component wear.
NOTICE
When removing the displacement pump, hold it
securely. The pump is heavy and could fall off the
motor if not held securely, causing damage to the
outside of the pump.

Service
307158ZAP 9
Disassembly (continued -- refer to Fig. 3)
8. For Models 217022, 217338, 262818, and 24W139,
loosen, but do not remove, the four tie rod nuts (3)
and the nuts (B) on the hydraulic tube (48).
For Model 235345, you need to remove the cap
screws (21), the drip pan (26), the drip cover (31),
and machine screw (42) before loosening the tie rod
nuts. Then remove the four tie rod nuts (3). Loosen
the nuts (B) on the hydraulic tube (48) and loosen
the tie rods (35).
9. Remove the motor from the vise and lay it in a pan.
10. Remove one detent assembly: retaining plug (28),
o-ring (25), spring (29), ball guide (27) and ball (7). If
the ball or other parts stick in the upper housing
(40), turn the motor over and tap lightly. Do not
allow the parts to fall into the motor. Repeat the
procedure for the other detent assembly.
11. Remove the tie rods (35), but do not remove the
crown nuts (22).
12. Remove the socket screws (8) and the end cap (44).
Pull the stop plug (43) from the upper housing (40).
13. Unscrew the top and bottom compression nuts (B)
on the hydraulic tube (48). Rotate the upper
housing (40) and remove the tube, being careful not
to damage the flare (A). Allow the oil to drain from
the motor into the pan.
14. Rock the upper housing (40) to work it free and lift it
about 3 inches off the cylinder (39). The cylinder
can stay in the lower housing (41).
15. Hold the trip rod (36) with an adjustable wrench on
the flats of the rod, and remove the top hex nut (20)
from the trip rod.
16. Remove the upper housing (40).
17. Remove the trip rod guides (34), compression
springs (38) and valve spool (37) from the upper
housing. Inspect the bearing inside of the guide (51)
in place. If bearing is damaged replace item 51.
NOTE: Inspect the trip rod (36) above the shoulder for
damage. There must be no reduction in diameter.
Replace if necessary.
18. Pull the trip rod and piston from the lower housing
(41) and cylinder (39). Place the piston flats (49a) in
a vise; tighten the vise on the flats of the piston.
Remove retaining ring (49c) and use a face spanner
to remove the retainer (49b). Remove the trip rod
(36) from the piston (49a).
19. Remove the trip rod locknut (9) and piston stop
(33). If the piston is replaced, remove the spring (55)
to use in the new piston.
20. For Models 217022 and 217338, place the lower
housing (41) on top of vice jaws. Pinch the adapter
plate (14) in the jaws. Twist and remove. Inspect the
bearing (30) and wiper (18) for wear. Replace if
necessary.
21. Turn lower housing over and remove the seal (23)
and backup seal (23a).
22. For Models 235345, 262818, and 24W139, remove
the bearing (45), packings (23), and o-ring (12,
Model 235345 only).
NOTICE
With the tie rods removed, the assembly may separate
at the joints between the cylinder (39) and the upper
and lower housings (40 and 41). Hold motor and
housings securely when removing parts to avoid
premature separation of large parts and possible
damage to parts from falls.

Service
10 307158ZAP
FIG. 3 _________________________________________ __
Model 217022, Series E, shown
NOTE: Circled letters refer to connected points.
NOTE: Graco recommends replacing piston (49a),
retainer (49b), and retaining ring (49c) together in
kits appropriate to motor configurations. See
pages 14, 22, 24, or 26 depending on model
A
A
8
44
43
22
1
40 7
27
29*
25
28
39
13
13*
35
41
23*
23a*
12*
30
14
18*
10
3
56
16
11*
54
57
17
B
48
B
A
56
37
38*
34
51
24
20
34
38*
36
49c
49b
33
9
19*
55
49a