Page 1
Instructions - Parts List
®
High-Flo
Designed 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.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for Table of Contents and page 3 for
List of Models, including maximum working
pressures.
Pumps
311831E
Related Manuals
Part No. Description
311238 NXT Air Motor manual
308048 Viscount Hydraulic Motor manual
311832 High-Flo Lower manual
Patent Pending
NXT Air-Powered Pump
shown mounted on 218742
Accessory Pump Stand
(not included)
TI8381a
II 2 G
Page 2
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
NXT Air-Powered Pumps . . . . . . . . . . . . . . . . . . 3
Viscount II Hydraulic-Powered Pumps . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mount the Pump . . . . . . . . . . . . . . . . . . . . . . . . . 6
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Air-Powered Pumps . . . . . . . . . . . . . . . . . . . 7
Hydraulic-Powered Pumps . . . . . . . . . . . . . . 7
All Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Tri-Clamp Adapters . . . . . . . . . . . . . . . . . . . . . . . 8
Air-Powered Pumps . . . . . . . . . . . . . . . . . . . . . . 9
Hydraulic-Powered Pumps . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pressure Relief Procedure . . . . . . . . . . . . . . . . 11
Flush Before Using Equipment . . . . . . . . . . . . . 11
Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Preventive Maintenance Schedule . . . . . . . . . . 12
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Air Line Filter . . . . . . . . . . . . . . . . . . . . . . . 12
Hydraulic Power Supply Check . . . . . . . . . . 12
Mix Tank Volume . . . . . . . . . . . . . . . . . . . . . 12
Packing Nut Tightness . . . . . . . . . . . . . . . . 12
Excessive Leaking at Throat . . . . . . . . . . . 12
Stop the Pump at the Bottom of Its Stroke . . . . 12
Wetcup Maintenance . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Disconnect the Lower . . . . . . . . . . . . . . . . . . . . 14
Reconnect the Lower . . . . . . . . . . . . . . . . . . . . . 14
Reassemble the Tie Rods to the Motor . . . . . . . 15
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
NXT Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Common Parts . . . . . . . . . . . . . . . . . . . . . . 17
Parts That Vary by Model . . . . . . . . . . . . . . 17
Viscount II Pumps . . . . . . . . . . . . . . . . . . . . . . . 18
Common Parts . . . . . . . . . . . . . . . . . . . . . . 18
Parts That Vary by Model . . . . . . . . . . . . . . 18
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Mounting Stand Hole Layout . . . . . . . . . . . . . . . . 19
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
NXT Air-Powered Pumps . . . . . . . . . . . . . . . . . . 20
Performance Charts . . . . . . . . . . . . . . . . . . 20
Viscount II 300 Pumps
Models 243742, 243755, & 243756 . . . . . . 22
Performance Charts . . . . . . . . . . . . . . . . . . 22
Viscount II 400 Pumps
Models 243741, 243753, & 243754 . . . . . . 23
Performance Charts . . . . . . . . . . . . . . . . . . 23
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 24
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 24
2 311831E
Page 3
Models
Models
NXT Air-Powered Pumps
Your model number is marked on the pump identification plate located toward the rear of the air motor. To determine
the model number of your pump from the following matrix, select the six digits which describe your pump. The first
digit is always J for circulation pumps. The remaining five digits define the construction. For example, a circulation
pump with stainless steel construction, a 3.3:1 ratio, low noise exhaust, no communication option, npt fittings, and
Chromex rod and chrome cylinder is model number JS33L1. To order replacement parts, see page 17.
J S33 L1
First
Digit
J
(all
circulation
pumps)
Second
Digit Third and Fourth Digit
Material
C Carbon
Steel
S Stainless
Steel
Motor
Size
33 6500 4000 330 (2.3, 23) L Low
44 6500 3000 440 (2.8, 28) M Low
60 6500 2000 500 (3.4, 34) R Remote none
XX = X.X:1 ratio
Lower
Size
Fluid Pressure
Fifth Digit Sixth Digit
Maximum
psi (MPa, bar) Exhaust
Noise
Noise
S Remote
Communi-
cation Fittings Rod Cylinder
none 1 npt Chromex Chrome
™
DataTrak
DataTrak
3 bspp Chromex Chrome
™
Viscount II Hydraulic-Powered Pumps
Maximum Pump
Working Pressure
Model No. Series
243741 C 400 (2.8, 28) npt CS Chromex Chrome 243732
243742 C 300 (2.1, 21) npt CS Chromex Chrome 243733
243753 C 400 (2.8, 28) npt SST Chromex Chrome 243735
243754 C 400 (2.8, 28) bspp SST Chromex Chrome 243735
243755 C 300 (2.1, 21) npt SST Chromex Chrome 243736
243756 C 300 (2.1, 21) bspp SST Chromex Chrome 243736
psi (MPa, bar)
Connection
Style Material
Rod
Material
Cylinder
Material
High-Flo Lower
(see manual 311832)
311831E 3
Page 4
Warnings
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 symbol refers to procedure-specific risk. Refer back
to these warnings. Additional, product-specific warnings may be found 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 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 MSDS forms from distributor or retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.
• Do not alter or modify equipment.
• 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.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. 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 arc).
• 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.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail.
• If there is static sparking or you feel a shock, stop operation immediately. 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 MSDS’s 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.
• Always wear impervious gloves when spraying or cleaning equipment.
4 311831E
Page 5
Warnings
WARNING
MOVING PARTS HAZARD
Moving parts can pinch or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.
311831E 5
Page 6
Installation
Installation
Grounding
The equipment must be grounded. Grounding reduces
the risk of static and electric shock by providing an
escape wire for the electrical current due to static build
up or in the event of a short circuit.
Pump: use a ground wire and clamp. Remove the green
ground screw (Z) from the bottom of the air motor. Insert
the screw through the loop on the end of the ground wire
(Y) and reattach the screw to the air motor. Connect the
ground clamp to a true earth ground. See F
IG. 1.
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 nonconductive surface, 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
firmly to the side of a grounded metal pail, then trigger
the gun.
Mount the Pump
See FIG. 3 or FIG. 4 on pages 9 and 10. Mount the pump
in the accessory pump stand (B), Part 218742. Secure
the stand to the floor with M19 (5/8 in.) bolts which
engage at least 152 mm (6 in.) into the concrete floor to
prevent the pump from tipping.
Z Y
TI8250a
FIG. 1
Air and fluid hoses: use only electrically conductive
hoses with a maximum of 500 ft. (150 m) combined
hose length to ensure grounding continuity. Check the
electrical resistance of hoses. If total resistance to
ground exceeds 29 megohms, replace hose immediately.
Air compressor: follow manufacturer’s recommendations.
Hydraulic power supply: follow manufacturer’s recommendations.
Surge tank: use a ground wire and clamp.
Spray gun: ground through a connection to a properly
grounded fluid hose and pump.
6 311831E
Page 7
Installation
Accessories
Install the following accessories in the order shown in
F
IG. 3 and FIG. 4, using adapters as necessary.
Accessory Air Control Kits are available for the NXT
Air Motor. The kits include a master air valve, air
regulator, and filter. Order the kit separately. Use kit
NXT031 for the derated J_60__ pumps (75 psi
maximum air input pressure). See manual 311239
for more information.
Air-Powered Pumps
For typical installation, see FIG. 3 on page 9.
Air Line
• Bleed-type master air valve (M): required in your
system to relieve air trapped between it and the air
motor when the valve is closed.
Trapped air can cause the pump to cycle unexpectedly,
which could result in serious injury from splashing or
moving parts.
Hydraulic-Powered Pumps
For typical installation, see FIG. 4 on page 10.
Hydraulic Power Supply
CAUTION
The hydraulic power supply must be kept clean at all
times to avoid damage to the motor and hydraulic
power supply.
1. Blow out hydraulic lines with air and flush thoroughly before connection to the motor.
2. Plug hydraulic inlets, outlets, and line ends when
disconnecting them for any reason.
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
The hydraulic inlet on the motor is 3/4 in. npt. Use a
minimum 1/2 in. (13 mm) ID hydraulic supply line
(R).
• Supply line shutoff valve (H): isolates the motor
when servicing the system. See F
IG. 4.
Be sure the valve is easily accessible from the pump
and located downstream from the air regulator. Be sure
the air bleed hole points away from the operator.
The air motor is rated to 100 psi (0.7 MPa, 7.0 bar). If
you will apply more than 100 psi (0.7 MPa, 7.0 bar) to
the system, install a safety relief valve between the
bleed-type master air valve and the air motor.
• Pump air regulator (L): to control pump speed and
outlet pressure. Locate close to the pump.
• Air line filter (K): removes harmful dirt and mois-
ture from compressed air supply.
• Second bleed-type air valve (M): isolates air line
accessories for servicing. Locate upstream from all
other air line accessories.
• Hydraulic fluid pressure gauge (J): monitors the
hydraulic oil pressure to the motor to avoid overpressurizing the motor or lower.
• Pressure- and temperature-compensated flow
control valve (K): prevents the motor from running
too fast, which can damage it.
• Pressure reducing valve (L), which has a drain
line (M) running to the return line (S): controls the
hydraulic pressure to the motor.
311831E 7
Page 8
Installation
Hydraulic Return Line
The hydraulic outlet on the motor is 1 in. npt. Use a
minimum 5/8 in. (16 mm) ID hydraulic return line
(S).
• Return line shutoff valve (N): isolates the motor
when servicing the system.
CAUTION
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.
• Return fluid filter (J): removes residue from the
hydraulic fluid to help keep the system running
smoothly (10 micron size).
All Pumps
Fluid Line
• Fluid filter: with a 60 mesh (250 micron) stainless
steel element to filter particles from the fluid as it
leaves the pump.
Plumbing
The lowers have a 2 in. npt(f) fluid inlet and a 2 in. npt(f)
fluid outlet or a 2 in. bspp(f) and a 2 in. bspp(f) fluid outlet.
Use 2 in. (50 mm) diameter pipe and plumbing. Install a
fluid shutoff valve (D) between each tank and the pump.
When using a stainless steel pump, use stainless steel
plumbing to maintain a corrosion-resistant system.
Tri-Clamp Adapters
Tri-clamp adapters are available which allow sanitary
pipe to be connected to a pump with bspp inlet and outlet. Refer to F
Install a 2 in. tri-clamp gasket (AA) in the groove of the
tri-clamp adapter (BB). Mate the tri-clamp adapter with
the sanitary pipe and secure with two clamps (CC), bolts
(DD), and nuts (EE). Install the bolts in opposite directions.
IG. 2.
• Fluid drain valve (T): required in your system, to
relieve fluid pressure in the hose and gun.
• Fluid shutoff valve (D): shuts off fluid flow.
• Fluid pressure regulator: for more precise adjust-
ment of the fluid pressure.
• Gun or valve: to dispense fluid.
• Fluid line swivel: for easier gun movement.
• Suction kit: enables the pump to draw fluid from a
container.
EE
FIG. 2
AA
BB
1
2
1
1
Customer must supply.
2
Graco adapter 193202. Requires seal 193424.
DD
CC
1
8689a
1
8 311831E
Page 9
Air-Powered Pumps
M
J
Installation
M
P
A
FIG. 3: Typical Installation
KL
DC
N
G
B
DD
E
N
F
TI8435a
Key:
AMix Tank
B Pump Stand
C Fluid Supply Line; 2 in. (50 mm) minimum diameter
D Fluid Shutoff Valve
E Fluid Line
F Surge Tank Stand
G Surge Tank
J Air Supply Line
K Air Line Filter
L Air Regulator and Gauge
M Bleed-Type Master Air Valve
N Fluid Drain Valve
P Air Line Drain Valve
311831E 9
Page 10
Installation
Hydraulic-Powered Pumps
R S
M
P L J
A
H
Y
K
T
D
G
D
E
T
D
C
FIG. 4: Typical Installation
Key:
A Mix Tank
B Pump Stand
C Fluid Supply Line; 2 in. (50 mm) minimum diameter
D Fluid Shutoff Valve
E Fluid Line
F Surge Tank Stand
G Surge Tank
H Hydraulic Supply Line Shutoff Valve
J Hydraulic Pressure Gauge
K Flow Control Valve
L Pressure Reducing Valve
MDrain Line
N Hydraulic Return Line Shutoff Valve
P Accumulator
R Hydraulic Return Line
S Hydraulic Supply Line
T Fluid Drain Valve
Y Ground Wire
B
F
TI8436a
10 311831E
Page 11
Operation
Operation
Pressure Relief Procedure
1. Engage trigger lock.
2. Air-Powered Pumps only: Close the bleed-type
master air valve.
Hydraulic-Powered Pumps only: Shut off the
hydraulic supply line valve (H) first, then the return
line valve (N).
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having
waste containers ready to catch drainage. Leave the
drain valves open until you are ready to spray again.
7. If you suspect the spray tip or hose is 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 to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
CAUTION
Hydraulic-Powered Pumps only: When shutting down
the hydraulic system, always shut off the hydraulic
supply line shutoff valve (H) first, and then the return
line shutoff valve (N) to prevent overpressurizing the
motor or its seals. When starting the hydraulic system, open the return line shutoff valve first.
Trigger Lock
Always engage the trigger lock when you stop spraying
to prevent the gun from being triggered accidentally by
hand or if dropped or bumped.
Pump Operation
In a circulation system, the pump operates continuously until the power supply is shut off.
In a direct-supply system, the pump starts when the
gun is opened, and stops when the gun is closed.
Perform a stall test periodically to ensure the piston
seal is in good working condition and prevent system overpressurization:
Close the fluid shutoff valve (D) closest to the pump
on the downstroke 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.
CAUTION
Do not allow the pump to run quickly for a long period
of time as this may damage the packings.
Stop the pump on the downstroke, before the air
motor changes over.
CAUTION
Flush Before Using Equipment
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid contaminating your fluid with oil, flush the equipment with a
compatible solvent before using the equipment. See
Flushing, page 12.
311831E 11
Failure to stop the pump at the bottom of its stroke
allows fluid to dry on the piston rod, which can damage the throat packings when the pump is restarted.
Hydraulic-Powered Pumps only: Always shut off the
supply line shutoff valve (H) first, and then the
return line shutoff valve (N). This is to prevent overpressurizing the motor or its seals.
Page 12
Maintenance
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 maintenance schedule should include the following:
Flushing
• Flush before shutting down the system for an
extended period of time.
• Flush before repairing the pump, if possible.
• Flush before fluid can dry out, settle, or set up
in the equipment.
Air Line Filter
Drain and clean as necessary.
Hydraulic Power Supply Check
Excessive Leaking at Throat
If you see excessive leaking at the throat, tighten the
packing nut (21), see F
lem, replace the throat packings, piston rod, or both.
See manual 311832.
F
IG. 5
IG. 5. If this does not fix the prob-
NXT Air-Powered
Pump Shown
1
21
1
Torque to 20-25 ft-lb (27-34 N•m).
TI8381a
Carefully follow the hydraulic power supply manufacturer's recommendations on reservoir and filter cleaning,
and periodic changes of hydraulic fluid.
Mix Tank Volume
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.
Packing Nut Tightness
Check the packing nut (21) tightness every few days at
startup and then weekly throughout the life of the seal.
The packing nut should be tight enough to stop leakage,
but no tighter. See F
To check the adjustment of the packing nut, stop the
pump and relieve fluid pressure. Loosen the packing nut
until it turns freely. Tighten the nut firmly and then turn
the nut another 1/4 turn. If you have a torque wrench,
tighten the packing nut to 20-25 ft-lb (27-34 N•m).
IG. 5.
Stop the Pump at the Bottom of
Its Stroke
Relieve the pressure when you stop the pump for any
reason. Stop the pump on the downstroke, before the air
motor changes over.
CAUTION
Failure to stop the pump at the bottom of its stroke
allows fluid to dry on the piston rod, which can cause
damage to the throat packings when the pump is
restarted.
Wetcup Maintenance
Fill the wetcup/packing nut (12) one-half full with Graco
Throat Seal Liquid (TSL). Maintain level daily.
12 311831E
Page 13
Troubleshooting
Troubleshooting
1. Relieve the pressure.
2. Check all possible problems and solutions before
disassembling pump.
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure Relief Procedure on page 15.
PROBLEM CAUSE SOLUTION
Pump output low on both strokes. Restricted air or hydraulic supply lines. Clear any obstructions; be sure all shutoff
valve are open; increase pressure, but do
not exceed maximum working pressure.
Exhausted fluid supply. Refill and reprime pump.
Clogged fluid outlet line, valves, etc. Clear.
Worn piston packing. Replace. See lower manual 311832.
Pump output low on only one stroke. Held open or worn ball check valves. Check and repair.
Worn piston packings. Replace. See lower manual 311832.
No output. Improperly installed ball check valves. Check and repair.
Pump operates erratically. Exhausted fluid supply. Refill and reprime pump.
Held open or worn ball check valves. Check and repair.
Worn piston packing. Replace. See lower manual 311832.
Excessive hydraulic fluid supply pressure
to Viscount motor.
Pump will not operate. Restricted air or hydraulic supply lines. Clear any obstructions; be sure all shut
Exhausted fluid supply. Refill and reprime pump.
Clogged fluid outlet line, valves, etc. Clear.
Damaged air motor or hydraulic motor. See air motor manual 311238 or hydrau-
Fluid dried on piston rod (17). Disassemble and clean pump. See lower
See Viscount motor manual 308048.
off valves are open; increase pressure,
but do not exceed maximum working
pressure.
lic motor manual 308330.
manual 311832. In future, stop pump at
bottom of stroke.
311831E 13
Page 14
Repair
Repair
• To service the lower, see manual 311832.
• To service the air motor, see manual 311238.
• To service the hydraulic motor, see manual
308048.
Disconnect the Lower
To service the lower, follow the procedure on this page,
and disassemble the lower as described in manual
311832.
In stand or wall-mounted installations, you do not
have to remove the entire pump from its mounting.
3. Insert the collars (G) into the coupling nut (K).
Tighten the coupling nut onto the motor shaft (F)
and torque to 145-155 ft-lb (196-210 N•m).
4. Flush and test the pump before reinstalling it in the
system. Connect hoses and flush the pump. While it
is pressurized, check for smooth operation and
leaks. Adjust or repair as necessary before reinstalling in the system. Reconnect the pump ground wire
before operating.
NXT Air-Powered
E
Pump Shown
1. Relieve the pressure, see Pressure Relief Procedure page 11.
2. Disconnect the hoses from the lower and plug the
ends to prevent fluid contamination.
3. Unscrew the coupling nut (K) from the motor shaft
(F) and remove the collars (G). Remove the coupling nut from the piston rod (H). Unscrew the locknuts (B) from the tie rods (C). Pull the motor (E) off
the lower (D). See F
IG. 6 and FIG. 7.
Reconnect the Lower
If the tie rods (C) have been disassembled from the
motor, see Reassemble the Tie Rods to the Motor
on page 15.
1. Assemble the coupling nut (K) to the piston rod (H).
1
Torque to 145-155
ft-lb (196-210 N•m).
2
Torque to 50-60 ft-lb
(68-81 N•m).
3
Apply lubricant and
PTFE tape.
FIG. 6
F
2
C
3
B
2
3
G
K
H
D
TI8382b
1
2. Orient the lower (D) to the motor (E). Position the
lower on the tie rods (C). Lubricate the threads of
the tie rods. Screw the tie rod locknuts (B) onto the
tie rods. Tighten the locknuts and torque to 50-60
ft-lb (68-81 N•m).
14 311831E
Page 15
Repair
Viscount II
Pump Shown
1
Torque to 145-155 ft-lb
(196-210 N•m).
2
Torque to 50-60 ft-lb
(68-81 N•m).
3
Apply lubricant and
PTFE tape.
F
IG. 7
E
F
H
3
G
1
C
K
3
2
B
D
TI8385a
Reassemble the Tie Rods to the
Motor
Use this procedure only if the tie rods (C) have
been disassembled from the motor.
Screw the tie rods (C) into the base of the motor and
torque to 50-60 ft-lb (68-81 N•m).
311831E 15
Page 16
Repair
16 311831E
Page 17
Parts
Parts
NXT Pumps
106
107
101
108
105
104
103
102
218742 Stand
(not included)
Common Parts
Ref.
No. Description Part No. Qty.
101 MOTOR, NXT, see manual 311238 see table,
below
102 LOWER, High-Flo, see manual 311690 see table,
below
103 NUT, coupling 186925 1
104 COLLAR, coupling 184129 2
105 ADAPTER, coupling 15H370 1
106 TIE ROD, 19.307 in. (490.398 mm)
between shoulders
107 NUT, lock, hex; 5/8-11 102216 3
108 COVER, moisture 247362 1
15H600 3
Parts That Vary by Model
101 102
Air-Powered
Pump
(see page 3)
JC33L1 N65LNO 243733
JC33M1 N65LTO 243733
JC44L1 N65LNO 243732
JC44M1 N65LTO 243732
JC60L1 N65LNO 243731
JC60M1 N65LTO 243731
JS33L1 N65LN0 243773
JS33L3 N65LN0 243736
JS33M1 N65LT0 243773
JS33M3 N65LT0 243736
JS33R1 N65RN0 243773
JS33R3 N65RN0 243736
JS33S1 N65RT0 243773
JS33S3 N65RT0 243736
JS44L1 N65LN0 243772
JS44L3 N65LN0 243735
JS44M1 N65LT0 243772
JS44M3 N65LT0 243735
JS44R1 N65RN0 243772
JS44R3 N65RN0 243735
JS44S1 N65RT0 243772
JS44S3 N65RT0 243735
JS60L1 N65LN0 243771
JS60L3 N65LN0 243734
JS60M1 N65LT0 243771
JS60M3 N65LT0 243734
JS60R1 N65RN0 243771
JS60R3 N65RN0 243734
JS60S1 N65RT0 243771
JS60S3 N65RT0 243734
NXT Air Motor
(see manual 311238)
High-Flo Lower
(see manual 311832)
1
1
TI8382b
311831E 17
Page 18
Parts
Viscount II Pumps
106
105
107
108
101
103
Common Parts
Ref.
No. Description Part No. Qty.
101 MOTOR, Viscount II, see manual
308048
102 LOWER, High-Flo, see manual 311832 see table,
103 TIE ROD, 12.72 in. (323 mm) between
shoulders
104 NUT, lock, hex; 5/8-11 102216 3
105 NUT, coupling 186925 1
106 COLLAR, coupling 184129 2
107 ADAPTER, coupling; 2 in. npt; 2 in.
bspp
108 SEAL, 2 in. bspp see table,
223646 1
below
180487 3
see table,
below
below
Parts That Vary by Model
102 107 108
Hydraulic-
Powered
Pump
(see page 3)
243741 243732 none none
243742 243733 none none
243753 243735 196321 193424
243754 243735 none none
243755 243736 196321 193424
243756 243736 none none
High-Flo
Lower
(see manual
311832) Adapter Seal
1
1
1
102
104
108
107
218742 Stand
(not included)
TI8385a
18 311831E
Page 19
Dimensions Mounting Stand
Hole Layout
Dimensions
B
TI8381a
A
185.0 mm
(7.4 in.) radius
160.2 mm
(6.41 in.)
30°
160.2 mm
(6.41 in.)
30°
60°
277.5 mm
(11.1 in.)
Threaded 17 mm
(0.68 in.) holes
Air-Powered Pumps
A
Pump Model
NXT cs 51.4 (1306) 35.5 (901) 180 (81.8)
NXT sst 51.4 (1306) 35.5 (901) 180 (81.8)
NXT severe-duty sst 51.4 (1306) 35.5 (901) 180 (81.8)
in. (mm)
B
in. (mm)
Approx. Weight
lb (kg)
Hydraulic-Powered Pumps
A
Pump Model
Viscount I+ cst 64.9 (1649) 39.3 (998) 217 (98.4)
Viscount I+ sst 64.9 (1649) 39.3 (998) 217 (98.4)
Viscount I+ severe-duty sst 64.9 (1649) 39.3 (998) 217 (98.4)
311831E 19
in. (mm)
B
in. (mm)
Approx. Weight
lb (kg)
Page 20
Technical Data
Technical Data
NXT Air-Powered Pumps
Fluid Flow at
Maximum
Working Pressure
Model
psi (MPa, bar)
JX33XX 330 (2.3, 23) 100 (0.7, 7.0)
JX60XX 500 (3.4, 34) 75 (0.52, 5.2) 31 (118) 1.93 (0.5)
Performance Charts
To find Fluid Outlet Pressure (psi/MPa/bar) at a spe-
cific fluid flow (lpm/gpm) and operating hydraulic pressure (psi/MPa/bar):
1. Locate desired flow along bottom of chart.
Maximum
Air Input Pressure
psi (MPa, bar) Air Consumption
See Performance Charts
60 cycles per
minute
gpm (lpm)
Pump Cycles
per Gallon
(Liter)
63 (237) 0.93 (0.24)
Maximum
Fluid
Temperature
Rating
°F (°C)
150° (66°)JX44XX 440 (3.0, 30) 100 (0.7, 7.0) 47 (178) 1.3 (0.34)
2. Follow vertical line up to intersection with selected
fluid outlet pressure curve (black). Follow left to
scale to read fluid outlet pressure.
A 0.5 MPa, 4.9 bar (70 psi) air pressure
B 0.37 MPa, 3.7 bar (55 psi) air pressure
C 0.3 MPa, 2.8 bar (40 psi) air pressure
Test Fluid: No. 10 Weight Oil
psi (MPa, bar)
500 (3.44, 34.4)
450 (3.10, 31.0)
400 (2.75, 27.5)
350 (2.41, 24.1)
300 (2.06, 20.6)
250 (1.72, 17.2)
200 (1.37, 137)
Fluid Pressure
150 (1.03, 10.3)
100 (0.68, 68)
50 (0.34, 3.4)
NXT 6500 with 2000cc Lower Pumps (JX60XX)
A
B
C
Key
160
A
140
B
C
120
100
80
60
40
20
Air Flow (scfm)
0
5
(18.9)
10
(37.8)
15
(56.7)
20
(75.7)
25
(94.6)
(113.5)
30
35
(132.4)
Fluid Flow in gpm (lpm)
20 311831E
Page 21
A 0.7 MPa, 7 bar (100 psi) air pressure
B 0.5 MPa, 4.9 bar (70 psi) air pressure
C 0.3 MPa, 2.8 bar (40 psi) air pressure
Test Fluid: No. 10 Weight Oil
Technical Data
Key
Fluid Pressure
psi (MPa, bar)
NXT 6500 with 3000cc Lower Pumps (JX44XX)
450 (3.10, 31.0)
400 (2.75, 27.5)
350 (2.41, 24.1)
300 (2.06, 20.6)
250 (1.72, 17.2)
200 (1.37, 137)
150 (1.03, 10.3)
100 (0.68, 68)
50 (0.34, 3.4)
psi (MPa, bar)
350 (2.41, 24.1)
300 (2.06, 20.6)
250 (1.72, 17.2)
200 (1.37, 137)
A
A
B
B
C
0
10
(37.8)
20
(75.7)
Fluid Flow in gpm (lpm)
30
(113.5)
C
40
(151.4)
NXT 6500 with 4000cc Lower Pumps (JX33XX)
A
A
B
B
200
180
160
140
120
100
80
60
40
20
180
160
140
120
100
Air Flow (scfm)
Air Flow (scfm)
150 (1.03, 10.3)
80
C
Fluid Pressure
100 (0.68, 68)
C
50 (0.34, 3.4)
0
10
(37.8)
311831E 21
20
(75.7)
30
(113.5)
Fluid Flow in gpm (lpm)
40
(151.4)
60
40
20
50
(189.2)
Page 22
Technical Data
Viscount II 300 Pumps
Models 243742, 243755, & 243756
Category Data
Maximum Fluid Working Pressure 2.1 MPa 21 bar (300 psi)
Maximum Hydraulic Fluid Pressure 10.3 MPa, 103 bar (1500 psi)
Fluid Flow at 60 Cycles per Minute 237 liters/min (63 gpm)
Cycles Per Liter (gallon) 0.24 (0.93)
Maximum Recommended Pump Speed 60 cycles per minute
Maximum Hydraulic Motor Fluid Temperature 54°C (134°F)
Wetted Parts Model 243742: Carbon Steel, Stainless Steel, PTFE, Ultra High
Molecular Weight Polyethylene
Models 243755 & 243756: Stainless Steel, PTFE, Ultra High
Molecular Weight Polyethylene
Performance Charts
To find Fluid Outlet Pressure (psi/MPa/bar) at a spe-
cific fluid flow (lpm/gpm) and operating hydraulic pressure (psi/MPa/bar):
1. Locate desired flow along bottom of chart.
2. Follow vertical line up to intersection with selected
fluid outlet pressure curve (black). Follow left to
scale to read fluid outlet pressure.
A 10.3 MPa, 103 bar (1500 psi) hydraulic pressure
B 7.2 MPa, 72.4 bar (1050 psi) hydraulic pressure
C 4.1 MPa, 41 bar (600 psi) hydraulic pressure
&LUID/UTLET0RESSURE
-0ABAR
%2533%20$)
5
,&
PSI
!
"
#
CYCLESPERMINUTE
To find Motor Hydraulic Oil Consumption (l/min. or
gpm) at a specific fluid flow (l/min. or gpm):
1. Locate desired flow along bottom of chart.
2. Read vertical line up to intersection with hydraulic oil
consumption curve (dashes). Follow left to scale to
read hydraulic oil consumption.
(YDRAULIC/IL#ONSUMPTION
./)40-53.
GPM
LMIN
/#
,
)/#),5!2$9(
CYCLESPERMINUTE
GPM
LITERSMINUTE
22 311831E
&,5)$&,/74%34&,5)$./7%)'(4/),
GPM
LITERSMINUTE
&,5)$&,/74%34&,5)$./7%)'(4/),
Page 23
Technical Data
Viscount II 400 Pumps
Models 243741, 243753, & 243754
Category Data
Maximum Fluid Working Pressure 2.8 MPa, 28 bar (400 psi)
Maximum Hydraulic Fluid Pressure 10.3 MPa, 103 bar (1500 psi)
Fluid Flow at 60 Cycles per Minute 178 liter/min (47 gpm)
Cycles Per Liter (gallon) 0.34 (1.3)
Maximum Recommended Pump Speed 60 cycles per minute
Maximum Hydraulic Motor Fluid Temperature 54°C (134°F)
Wetted parts Model 243741: Carbon Steel, Stainless Steel, PTFE Ultra High
Molecular Weight Polyethylene
Models 243753 & 243754: Stainless Steel, PTFE, Ultra High
Molecular Weight Polyethylene
Performance Charts
To find Fluid Outlet Pressure (psi/MPa/bar) at a spe-
cific fluid flow (lpm/gpm) and operating hydraulic pressure (psi/MPa/bar):
1. Locate desired flow along bottom of chart.
2. Follow vertical line up to intersection with selected
fluid outlet pressure curve (black). Follow left to
scale to read fluid outlet pressure.
A 10.3 MPa, 103 bar (1500 psi) hydraulic pressure
B 7.2 MPa, 72.4 bar (1050 psi) hydraulic pressure
C 4.1 MPa, 41 bar (600 psi) hydraulic pressure
&LUID/UTLET0RESSURE
-0ABAR
%2
5
33%20$)
5,&
PSI
!
"
#
CYCLESPERMINUTE
To find Motor Hydraulic Oil Consumption (l/min. or
gpm) at a specific fluid flow (l/min. or gpm):
1. Locate desired flow along bottom of chart.
2. Read vertical line up to intersection with hydraulic oil
consumption curve (dashes). Follow left to scale to
read hydraulic oil consumption.
(YDRAULIC/IL#ONSUMPTION
./)
GPM
LMIN
4
0-53.
/#,
)/#),5
!2$
9(
CYCLESPERMINUTE
GPM
LITERSMINUTE
&,5)$&,/74%34&,5)$./7%)'(4/),
GPM
LITERSMINUTE
&,5)$&,/74%34&,5)$./7%)'(4/),
311831E 23
Page 24
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will
be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
This manual contains English. MM 311831
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
Copyright 2006, Graco Inc. is registered to ISO 9001
www.graco.com
Revised 2/2009
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