Instructions–Parts List
ViscountR II
Hydraulic Motor
307158ZAF
EN
Reciprocating hydraulic motor for use with Graco high performance
coating pumps.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Model 235345
See page 2 for model information, including
maximum hydraulic fluid input pressure.
04471
Warnings
Warning Symbol
Caution Symbol
WARNING
CAUTION
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
corresponding 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.
INSTRUCTIONS
D Read all instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
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 Technical 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 82_C (180_F) or below –40_C (–40_F).
D Do not move or lift pressurized equipment.
D Wear hearing protection when operating this equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
307158
3
WARNING
SKIN INJECTION HAZARD
Spray from the gun, hose leaks or ruptured components can inject fluid into your body and cause
extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin
can also cause serious injury.
D Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
D Do not point the gun at anyone or at any part of the body.
D Do not put your hand or fingers over the spray tip.
D Do not stop or deflect leaks with your hand, body, glove or rag.
D Do not “blow back” fluid; this is not an air spray system.
D Always have the tip guard and the trigger guard on the gun when spraying.
D Check the gun diffuser operation weekly. Refer to the gun manual.
D Be sure the gun trigger safety operates before spraying.
D Lock the gun trigger safety when you stop spraying.
D Follow the Pressure Relief Procedure on page 8 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
D Tighten all fluid connections before operating the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
D 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 the couplings.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers.
D Keep clear of all moving parts when starting or operating the pump.
D Before servicing the equipment, follow the Pressure Relief Procedure on page 8 to prevent the
equipment from starting unexpectedly.
4
307158
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.
D Ground the equipment and the object being sprayed. Refer to Grounding on page 7.
D If 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.
D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
D Keep the spray area free of debris, including solvent, rags, and gasoline.
D Before operating this equipment, electrically disconnect all equipment in the spray area.
D Before operating this equipment, extinguish all open flames or pilot lights in the spray area.
D Do not smoke in the spray area.
D Do not turn on or off any light switch in the spray area while spraying or while there are any fumes
in the air.
D Do 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.
D Know the specific hazards of the fluid you are using.
D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
307158
5
Installation
WARNING
Maximum Hydraulic Input Pressure
The maximum safe hydraulic input pressure to this
motor depends on the lower displacement pump to
which it is connected.
CAUTION
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.
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.
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
For Graco Displacement Pump Models 24B923
and 687055, usa a maximum of 1900 psi (13.1
MPa, 131 bar) hydraulic input pressure.
The recommended hydraulic oil operating tempera-
ture 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.
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.
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 tempera-
ture 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.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
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.
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.
Refer to the complete pump manual for detailed instal-
lation 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.
CAUTION
Keep the hydraulic system clean
40
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.
A
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.
04467
57
Fig. 1
6
307158
Installation
7. Any pails used when flushing: Use only metal,
Grounding
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 pres-
sure.
WARNING
For your safety, read the FIRE AND EXPLOSION
HAZARD WARNINGS on page 5, and ground
your entire system as instructed below. This sec-
tion also includes details on how to connect the
grounding wire and clamp to the various hydraulic
motors.
8. 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, 262818, and 24W139
Loosen the locknut (A) of the grounding lug and wash-
er. Insert one end of the wire (B) in the grounding lug
(61) and tighten the locknut securely. See Fig. 2.
Connect the other end of the wire to a true earth
ground, as recommended by your local code. Order
Part No. 237569, Ground Wire and Clamp.
Proper grounding is an essential part of maintaining a
safe system.
To reduce the risk of static sparking, ground the pump.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Be
sure to ground all of this equipment:
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.
1. Pump: use a ground wire and clamp as shown to
the right.
2. Hydraulic hoses and fluid outlet hoses: use only
electrically conductive hoses.
B
3. Hydraulic power supply and air compressor:
follow manufacturer’s recommendations.
4. Spray gun: obtain grounding through connection to
a properly grounded fluid hose and pump.
5. Fluid supply container: according to local code.
6. Object being sprayed: according to local code.
61
A
04468
Fig. 2
307158
7
Service
Pressure Relief Procedure
Before you start:
Be sure you have all necessary parts on hand.
WARNING
SKIN INJECTION HAZARD
1. Repair Kit 220457 is available for Models 217022
and 217338.
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
Repair Kit 223654 is available for Models 235345,
262818, and 24W139.
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:
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.
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray tip.
3. Clean all parts as you disassemble them and
inspect them for wear or damage. Replace parts
as necessary.
Disassembly (Refer to Fig. 3)
1. Lock the gun trigger safety.
NOTE: Use all the replacement parts that are in the
repair kit.
2. Shut off the hydraulic power supply.
1. Flush the displacement pump if possible.
3. Close the supply line shutoff valve, and then the
return line shutoff valve.
WARNING
4. Unlock the gun trigger safety.
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
2. Relieve the pressure.
6. Lock the gun trigger safety.
3. Stop the pump at the bottom of its stroke.
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.
CAUTION
Avoid getting dust or dirt in the motor during service.
Cleanliness is essential when repairing an hydraulic
motor.
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.
4. Disconnect the displacement pump hoses. Discon-
nect the hydraulic hoses and plug all hydraulic
connections and lines to prevent contamination.
8
307158
Service
Disassembly (continued – refer to Fig. 3)
13. Unscrew the top and bottom compression nuts (B)
on the hydraulic tube (48). Rotate the upper hous-
ing (40) and remove the tube, being careful not to
damage the flare (A). Allow the oil to drain from
the motor into the pan.
CAUTION
When removing the displacement pump, hold it
securely. The pump is heavy and could fall off the
motor.
CAUTION
With the tie rods removed, the assembly may sepa-
rate at the joints between the cylinder (39) and the
upper and lower housings (40 and 41).
5. Disconnect the displacement pump from the
motor, as explained in your separate pump manu-
al.
6. Place the hydraulic motor in a bench vise.
14. Rock the upper housing (40) to work it free and lift
it about 3 inches off the cylinder (39). The cylin-
der can stay in the lower housing (41).
7. Push or lightly tap the piston (49) up as far as
possible.
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.
NOTE: The tie rod nuts (3), socket screws (8), cap–
screws (24), and retainer (32) are fastened with Loc-
titer TL–242. Heat may be used sparingly to soften
adhesive sealant during disassembly.
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.
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).
NOTE: Inspect the trip rod (36) above the shoulder for
damage. There must be no reduction in diameter.
Replace if necessary.
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).
18. Pull the trip rod and piston from the lower housing
(41) and cylinder (39). Place the piston flats (49) in
a vise; tighten the vise on the flats of the piston.
Use a face spanner to remove the retainer (32).
Remove the trip rod (36) from the piston (49).
9. Remove the motor from the vise and lay it in a
pan.
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.
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.
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.
11. Remove the tie rods (35), but do not remove the
crown nuts (22).
21. Turn lower housing over and remove the seal (23)
and backup seal (23a).
12. Remove the socket screws (8) and the end cap
(44). Pull the stop plug (43) from the upper hous-
ing (40).
22. For Models 235345, 262818, and 24W139, re-
move the bearing (45), packings (23), and o-ring
(12, Model 235345 only).
307158
9
Service
Model 217022 shown
13
8
44
43
35
22
1
40
39
13
11
7
27
29
25
28
54
57
17
41
56
A
20
56
23
34
38
B
48
36
32
23a
12
37
16
38
34
B
A
30
14
A
33
9
51
24
19
18
10
55
49
3
04464
NOTE: Circled letters refer to connected points.
Fig. 3
10 307158
Service
10. Remove the adjustable wrench. Seat the upper
Reassembly (Refer to Fig. 4)
housing (40) onto the cylinder (39), so the tube
NOTE: Model 217022 uses one seal (23) and a back-
fittings align with those on the lower housing.
up seal (23a).
Reinstall the hydraulic tube (48) and loosely
tighten the compression nuts. See the Parts
Drawing for your motor.
1. Lubricate the seal(s) (23) with hydraulic oil. Install
them in the lower housing (41) with the lips facing
up toward the top of the motor.
11. Replace the o-ring (11) on the stop plug (43). Seat
the plug into the upper housing (40).
2. For Models 217022 and 217338, install the o-ring
(12*) onto the adapter (14). Install the adapter (14)
into the lower housing (41), making sure it seats
properly. For Model 235345, install the o-ring (12)
onto the lower housing (41).
12. Install the end cap (44), using thread sealant on
the socket screws (8).
13. Lubricate the threads of the tie rods (35) and install
them with lockwashers (1). If the crown nuts (22)
were removed, reinstall them and torque them
onto the rods to 70–80 ft-lb (95–108 N.m).
3. Place the piston flats in a vise. Install the spring
(55) inside the piston (49). The compression rings
(19) must be positioned with the joints about 180_
opposed. Be sure the o-ring (26) is in place on
Model 235345.
14. For Models 217022, 217338, 262818, and
24W139, take the motor out of the vise jaws and
lay it on its side. Install the lower plate (10).
4. Install the piston stop (33) and locknut (9) on the
trip rod. Torque the nut to 117–123 in-lb (13.2–13.9
N.m). Slide the trip rod (36) into the piston (49).
Apply thread sealant to the retainer (32) threads.
With the piston flats in a vise, tighten the retainer
until it is flush or below the piston surface. This is
important to prevent the retainer from backing out
during operation and damaging the motor.
NOTE: For Model 217022, align the point of adapter
plate (10) in the same direction as the fluid tube (16).
15. For Models 217022, 217338 and 262818, apply
thread sealant to the lower threads of the tie rods
(35) and torque the tie rod nuts (3) to 70–80 ft-lb
(95–108 N.m).
NOTE: For Models 235345, 262818, and 24W139, set
base (2) on workbench during reassembly. For Models
217022 and 217338, place adapter (14) in vise jaws
and lower housing (41) on top of jaws.
For Model 235345 and 24W139, torque tie rods
into base, apply thread sealant, then torque the tie
rod nuts (3) to 70–80 ft–lb (95–108 N.m).
5. Install the o-ring (13) onto the cylinder (39). Install
the cylinder (39) into the lower housing (41).
16. With the motor on its side, install one detent
assembly: the ball (7), guide (27) with the concave
surface toward the ball, spring (29), o-ring (25*)
and retaining plug (28). Torque the plug to
152–158 in-lb (17.2–17.9 N.m). Repeat for the
other side of the motor.
6. Install the trip rod and piston into the cylinder (39)
and lower housing (41) so the piston is recessed at
least 1 inch (25 mm) from the top of the cylinder.
7. If the bearing and guide (51) was removed, install
it on the upper housing (40) with the three screws
(24) (apply thread sealant).
17. For Model 235345, slide the drip cover (31) onto
the piston (49) up to the o-ring (30). Install screw
(42) into the piston. Attach the drip pan (26) to the
base using screws (21).
8. Hold the flats of the trip rod with an adjustable
wrench and install the upper housing (40). The trip
rod will protrude from the top.
18. Snugly tighten the compression nuts on the hy-
draulic tube (48) and torque to 60–80 ft-lb (81–108
N.m).
9. Slide the lower trip rod guide (34) and spring (38)
onto the trip rod. Install the spool (37) with the
detent at the top. Install the top spring (38) and
guide (34) on the trip rod. Install the top hex nut
(20). Torque the nut to 82–88 in-lb (9.3–9.9 N.m).
19. Install the motor on the displacement pump. Re-
connect all fluid lines. Be sure the ground wire is
connected before operating the pump.
307158 11
Service
44
8
10
7
6
27
34
29
25
8
20
28
9
38
40
24
37
34
Rings must be positioned
with joints opposed
1
10
Lips must face
up toward top of motor
2
3
51
Model 235345 use only one
seal (23)
Torque to
70–80 ft-lb (95–108 N.m)
36
35
4
5
Apply thread lubricant to
lower threads
5
13
32
19
Concave surface faces ball
10
1
6
7
8
Torque to
117–123 in-lb (13.2–13.9 N.m)
Torque to
82–88 in-lb (9.3–9.9 N.m)
33
9
7
Torque to
152–158 in-lb (17.2–17.9 N.m)
9
R
13
41
Apply Loctite TL–242
Thread Sealant
10
55
30
2
3
23
12
4
10
3
04487
Fig. 4
12 307158
Notes
307158 13
Parts
Model 217022, Series D
13*
35
8
44
43
22
1
40
39
*11
7*
27*
29*
25*
28*
*13
54
57
17
41
56
A
20
56
23
34
38*
48
23a
12*
30
36*
32
*37
16
*38
34
A
33*
51
24
9
14
18
*19
55
49
10
3
NOTE: See the service section for important
torque and lubrication information.
NOTE: Circled letters refer to connected points.
04464
14 307158
Parts
Model 217022, Series D
Includes items 1–57
Ref.
No.
Ref.
No.
Part No. Description
Qty.
Part No. Description
SPRING, helical compression
Qty.
1
3
7*
8
100128
102087
101701
101864
LOCKWASHER, spring, 5/8 in.
NUT, hex jam, 5/8–18
BALL, 1/4 in. dia.
CAPSCREW, soc hd,
5/16–18 x 1 in.
4
4
2
29*
30
32
33*
34
35
36*
37*
38*
39
40
41
43
44
48
49
51
54
55
56
57
108522
171395
171398
181243
183659
177931
171407
181874
171411
171412
172814
171414
183252
183290
210108
188086
210292
101754
104664
105429
105430
2
1
1
1
2
4
1
1
2
1
1
1
1
1
1
1
1
1
1
2
BEARING, sleeve
RETAINER
STOP, piston
GUIDE, trip rod
ROD, tie
3
1
1
1
1
2
1
9
103450
609821
104093
104280
104095
609820
104098
104099
NUT, hex, self-locking, 5/16–18
PLATE, tie
10
11*
12*
13*
14
16
17
ROD, trip
O-RING, nitrile rubber
O-RING, nitrile rubber
O-RING, nitrile rubber
ADAPTER, plate
TEE, tube, for 3/4 in. (19 mm) tube1
ELBOW, 90_, for
SPOOL, valve
SPRING, compression
CYLINDER
HOUSING, upper
HOUSING, lower
PLUG, stop
CAP, end
TUBE
PISTON
BEARING and GUIDE
PLUG, pipe, soc hd, 3/8 npt
SPRING, compression
NUT, seal, 3/4 npt
NUT, seal, 1 in. npt
supplied in a plastic bag
3/4 in. (19 mm) tube
WIPER
1
1
2
1
4
1
18
19*
20
22
23
23a
104102
104103
104105
104143
112130
112762
RING, piston, compression
NUT, hex lock, 1/4–20
NUT, crown, 5/8–18
SEAL, v-block, polyurethane
SEAL, backup, modular,
molythane
1
24
108538
SCREW, soc flat hd, self-locking,
1
1/4–20 x 1/2 in.
GASKET, plug
GUIDE, ball
PLUG, spring retaining
3
2
2
2
25*
27*
28*
150111
167210
167431
*
These parts are also included in Repair Kit 220457,
which may be purchased separately.
307158 15
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