Graco Dura-Flo 1800 Parts list manual

311826B
Instructions - Parts
Dura-Flo™Pumps
Carbon Steel or Stainless Steel Pumps, with Severe-Duty Rod and Cylinder
Dura-Flo 1800 (430 cc) Pump
Dura-Flo 2400 (580 cc) Pump
See page 3 for model information, including maximum work-
ing pressure.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
TI8900a
TI8885a
II 2 G

2311826B
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Dura-Flo Pumps with NXT™Air Motors . . . . . . . 3
Dura-Flo Pumps with Viscount®Hydraulic Motors 5
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Flush Before Using Equipment . . . . . . . . . . . . . . 8
Mounting Accessories . . . . . . . . . . . . . . . . . . . . . 8
Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Air Line Accessories . . . . . . . . . . . . . . . . . . . . . . 9
Hydraulic Line Accessories . . . . . . . . . . . . . . . . . 9
Fluid Line Accessories . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pressure Relief Procedure . . . . . . . . . . . . . . . . 12
Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preventive Maintenance Schedule . . . . . . . . . . 14
Wet-Cups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Corrosion Protection . . . . . . . . . . . . . . . . . . . . . 14
Hydraulic Systems . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Disconnect the Lower . . . . . . . . . . . . . . . . . . . . 16
Reconnect the Lower . . . . . . . . . . . . . . . . . . . . . 17
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Dura-Flo Pumps with NXT Air Motors . . . . . . . . 18
Dura-Flo Pumps with Viscount Hydraulic Motors 20
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mounting Hole Layouts . . . . . . . . . . . . . . . . . . . . . 23
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 28

Models
311826B 3
Models
Dura-Flo Pumps with NXT™Air Motors
Check your pump’s identification plate (ID) for the 6-digit part number of your
pump. Use the following matrix to define the construction of your pump, based
on the six digits. For example, Pump Part No. P15MCDrepresents the
pump (P), pressure ratio (15:1), low noise exhaust motor with DataTrak™(M),
carbon steel construction (C), and 3 ptfe/2 leather packing configuration (D). To
order replacement parts, see Parts section starting on page 18. The digits in
the matrix do not correspond to the Ref. Nos. in the Parts drawings and lists.
ID
P15 M C D
First
Digit
Second and Third
Digit Fourth Digit Fifth Digit Sixth Digit
Pressure Ratio (xx:1) Exhaust Communication Material Packings
P
(pumps)
12 D De-Icing none C Carbon Steel A 3 uhmwpe/2 ptfe
15 E De-Icing DataTrak S Stainless
Steel
B 3 uhmwpe/2
Tuff-Stack™
23 L Low Noise none D 3 ptfe/2 leather
32 M Low Noise DataTrak
Pump Part
No. and
Series
Lower
Part No. Lower Model, Packings
Air
Motor
Part No. Ratio
Maximum
Working Pressure
MPa, bar (psi)
Maximum Air
Input Pressure
MPa, bar (psi)
P12LCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N34LN0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12LSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N34LN0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12MCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N34LT0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12MSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N34LT0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12DSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N34DN0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12ESA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N34DT0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12DCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N34DN0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
P12ECD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N34DT0 12:1 8.2, 82 (1190) 0.7, 7.0 (100)
Continued on page 4.

Models
4311826B
P15LCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N34LN0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15LSB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N34LN0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15MCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N34LT0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15MSB, A 687055 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N34LT0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15DSB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N34DT0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15ESB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N34DN0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15DCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N34DN0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P15ECD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N34DT0 15:1 10.9, 109 (1580) 0.7, 7.0 (100)
P23DCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N65DN0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23ECD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N65DT0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23LCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N65LN0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23LSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N65LN0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23MCD, A 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
N65LT0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23MSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N65LT0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23DSA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N65DN0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P23ESA, A 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
N65DT0 23:1 15.7, 157 (2270) 0.7, 7.0 (100)
P32DCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N65DN0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32ECD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N65DT0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32LCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N65LN0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32LSB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N65LN0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32DSB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N65DN0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32ESB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N65DT0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32MCD, A 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
N65LT0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
P32MSB, A 687055 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
N65LT0 32:1 20.9, 209 (3030) 0.7, 7.0 (100)
Pump Part
No. and
Series
Lower
Part No. Lower Model, Packings
Air
Motor
Part No. Ratio
Maximum
Working Pressure
MPa, bar (psi)
Maximum Air
Input Pressure
MPa, bar (psi)

Models
311826B 5
Dura-Flo Pumps with Viscount®Hydraulic Motors
Check your pump’s identification plate (ID) for the 6-digit part number of your
pump. To order replacement parts, see Parts section starting on page 18. ID
Pump Part
No. and
Series
Lower
Part No. Lower Model, Packings
Hydraulic
Motor
Part No.
Maximum
Working Pressure
MPa, bar (psi)
Maximum
Hydraulic Input
Pressure
MPa, bar (psi)
222892, B 222796 Dura-Flo 1800 (430 cc) cst,
3 PTFE/2 leather
235345 18.0, 179 (2600) 10, 103 (1500)
222897, B 222805 Dura-Flo 1800 (430 cc) sst,
3 UHMWPE/2 PTFE
235345 18.0, 179 (2600) 10, 103 (1500)
222834, B 222801 Dura-Flo 2400 (580 cc) cst,
3 PTFE/2 leather
235345 14.0, 138 (2000) 10, 103 (1500)
222900, B 222803 Dura-Flo 2400 (580 cc) sst,
3 UHMWPE/2 PTFE
235345 14.0, 138 (2000) 10, 103 (1500)

Warnings
6311826B
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 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
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.
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 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.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
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 manu-
facturer’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.

Warnings
311826B 7
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.
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.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
• Hearing protection
WARNING

Installation
8311826B
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 the ground screw (GS) and lockwasher on
the motor to attach a 244524 ground wire (Y). Tighten
the screw securely. Connect the other end of the ground
wire to a true earth ground.
Air and fluid hoses: use only electrically conductive
hoses.
Air compressor or hydraulic power supply: follow
manufacturer’s recommendations.
Spray gun: ground through 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 nonconductive 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
firmly to the side of a grounded metal pail, then trigger
the gun.
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, page 14.
Mounting Accessories
See Dimensions, page 22 and Mounting Hole Lay-
outs, page 23.
FIG. 1 shows an air-powered system and FIG. 2 shows a
hydraulic-powered system.
Hoses
See FIG. 1 and FIG. 2. Be sure all hoses are properly
sized and pressure-rated for your system. Use only
electrically conductive hoses. Fluid hoses must have
spring guards on both ends. Use a whip hose (P) and a
swivel (R) between the main fluid hose (N) and the
gun/valve (S) to allow freer gun/valve movement.
GS
TI8250a
Y

Installation
311826B 9
Air Line Accessories
For air-powered pumps, install the following accessories
in the order shown in FIG. 1, using adapters as neces-
sary.
•Bleed-type master air valve (E): required in your
system to relieve air trapped between it and the air
motor when the valve is closed. Be sure the valve is
easily accessible from the pump and located down-
stream from the air regulator.
•Pump air regulator (F): to control pump speed and
outlet pressure. Locate it close to the pump.
•Air line filter (J): removes harmful dirt and moisture
from compressed air supply.
•Second bleed-type air valve (K): isolates air line
accessories for servicing. Locate upstream from all
other air line accessories.
Hydraulic Line Accessories
For hydraulic-powered pumps, install the following
accessories in the order shown in FIG. 2, using adapters
as necessary.
• Use a minimum 13 mm (1/2 in.) ID supply line (C),
and a minimum 22 mm (7/8 in.) ID return line (D).
The motor has a 3/4 npt(f) hydraulic oil supply fitting,
and a 1 in. npt(f) hydraulic oil return fitting.
•Supply line shutoff valve (U) isolates the pump for
service.
•Fluid pressure gauge (F) monitors hydraulic oil
pressure to the motor to avoid overpressurizing the
motor or lower.
•Pressure- and temperature-compensated flow
control valve (G) prevents the motor from running
too fast and possibly damaging itself.
•Pressure reducing valve (H) with a drain line (E)
runs directly to the hydraulic return line (D).
•Accumulator (J) reduces the hammering effect
caused by the motor reversing direction.
•Return line shutoff valve (V) isolates the pump for
service.
• Be sure your hydraulic power supply is equipped
with a suction filter to the hydraulic pump and a sys-
tem return line filter (W) of 10 micron size.
• Connect a 6 mm (1/4 in.) ID drain line (K) to the
barbed fitting on the drip pan, and place the free
end in a container to collect the drainage.
Fluid Line Accessories
Install the following accessories in the order shown in
FIG. 1 and FIG. 2, using adapters as necessary.
•Fluid drain valve (M): required in your system, to
relieve fluid pressure in the hose and gun.
•Fluid filter (L): with a 60 mesh (250 micron) stain-
less steel element to filter particles from the fluid as
it leaves the pump.
•Gun or valve (S): to dispense fluid.
•Fluid line swivel (R): for easier gun movement.
•Suction kit (T): enables the pump to draw fluid from
a container.
Accessory Air Control Kits are available for the NXT
Air Motor. The kits include a master air valve (E), air
regulator (F), and filter (J). Order the kit separately.
See manual 311239 for information.

Installation
10 311826B
Key:
APump
B Wall Bracket
D Air Line Lubricator
E Bleed-type Master Air Valve (required)
F Pump Air Regulator
H Electrically Conductive Air Supply Hose
J Air Line Filter
K Air Shutoff Valve
L Fluid Filter
M Fluid Drain Valve (required)
N Electrically Conductive Fluid Supply Hose
P Fluid Whip Hose
R Gun Swivel
S Airless Spray Gun
T Fluid Suction Kit
U Main Air Supply Line
V Air Line Drain Valve
Y Pump Ground Wire (required, see page 8 for installation
instructions)
FIG. 1: Typical Installation, Air-Powered Pumps
TI8433a
A
B
E
F
H
J
K
L
M
N
P
R
S
T
U
VY
D

Installation
311826B 11
Key:
APump
B Wall Bracket
C Hydraulic Supply Line
D Hydraulic Return Line
E Drain Line (from pressure reducing valve)
F Pressure Gauge
G Flow Control Valve
H Pressure Reducing Valve
J Accumulator
K Drain Line (from motor drip pan)
L Fluid Filter
M Fluid Drain Valve (required)
N Electrically Conductive Fluid Supply Hose
P Fluid Whip Hose
R Gun Swivel
S Airless Spray Gun
T Fluid Suction Kit
U Hydraulic Supply Line Shutoff Valve
V Hydraulic Return Line Shutoff Valve
W Hydraulic Return Line Filter
X Hydraulic Power Supply
Y Pump Ground Wire (required, see page 8 for installation
instructions)
Z Drainage Container
FIG. 2: Typical Installation, Hydraulic-Powered Pumps
TI8434a
A
B
C
DE
F
G
H
J
K
L
M
N
P
R
S
T
U
V
W
X
Y
Z

Operation
12 311826B
Operation
Pressure Relief Procedure
1. Engage trigger lock.
2. Shutoff the pump:
a. For air-powered pumps, close the bleed-type
master air valve.
b. For hydraulic-powered pumps, close the supply
line shutoff valve (U) first, then close the return
line shutoff valve (V).
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 a
waste container ready to catch drainage. Leave
drain valve(s) 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 follow-
ing the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
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.
Startup
1. Connect the suction kit (T) to the pump's fluid inlet,
and place the tube into the fluid supply.
2. Prepare the pump’s power source:
a. For air-powered pumps, close the air regulator
(F). Open the pump's bleed-type master air
valve (E).
b. For hydraulic-powered pumps, check the
hydraulic fluid level before each use, and add
fluid as necessary. Close the supply line shutoff
valve (U) and the return line shutoff valve (V).
Start the hydraulic power supply.
3. Hold a metal part of the gun (S) firmly to the side of
a grounded metal pail and hold the trigger open.
4. Start the pump:
a. For air-powered pumps, slowly open the air reg-
ulator until the pump starts.
b. For hydraulic-powered pumps, open the return
line shutoff valve (V) first, then slowly open the
supply line shutoff valve (U).
Trapped air can cause the pump to cycle unexpectedly,
which could result in serious injury from splashing or
moving parts.

Operation
311826B 13
5. Cycle the pump slowly until all air is pushed out and
the pump and hoses are fully primed. Release the
gun trigger and lock the trigger safety latch. The
pump should stall against pressure when the trigger
is released.
6. If the pump fails to prime properly, open the bleeder
valve plug (AB) slightly. Use the bleed hole as a
priming valve until the fluid appears at the hole. See
FIG. 3. Close the plug (AB).
7. With the pump and lines primed, and with adequate
air or hydraulic pressure and volume supplied, the
pump will start and stop as the gun is opened and
closed. In a circulating system, the pump will speed
up or slow down on demand, until the air or hydrau-
lic supply is shut off.
8. Always use the lowest air or hydraulic pressure nec-
essary to get the desired results. Higher pressures
cause premature tip/nozzle and pump wear.
a. For air-powered pumps, use the air regulator (F)
to control the pump speed and fluid pressure.
b. For hydraulic-powered pumps, use the fluid
pressure gauge (F) and flow control valve (G) to
control the pump speed and the fluid pressure.
9. Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a
high speed, possibly damaging itself.
Shutdown
Relieve the pressure, page 12. Stop the pump at the
bottom of its stroke to prevent fluid from drying on the
exposed displacement rod and damaging the throat
packings.
Do not use your hand or fingers to cover the bleed hole
on the underside of the bleeder valve body (AA) when
priming the pump. Use a wrench to open and close the
bleeder plug (AB). Keep your hands away from the
bleed hole.
When changing fluid containers with the hose and
gun already primed, open the bleeder valve plug
(AB), to assist in priming the pump and venting air
before it enters the hose. Close the bleeder valve
when all air has been eliminated.
If your pump accelerates quickly, or is running too
fast, stop it immediately and check the fluid supply.
If the supply container is empty and air has been
pumped into the lines, refill the container and prime
the pump and the lines with fluid, or flush and leave
it filled with a compatible solvent. Be sure to elimi-
nate all air from the fluid system.
FIG. 3. Bleeder Valve and Wet-Cup
TI8364a
AB
AA
AC
Bleed hole must face down.
1
1

Maintenance
14 311826B
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.
Wet-Cups
See FIG. 3. Check the wet-cup (AC) daily. Keep the
wet-cup 1/3 filled with Graco Throat Seal Liquid (TSL) or
compatible solvent.
Using the supplied wrench (108), adjust the packing nut
weekly so it is just snug; do not overtighten. Torque to
135-169 N•m (100-125 ft-lb).
Flushing
1. Follow Pressure Relief Procedure, page 12.
2. Remove spray tip and soak in solvent.
3. Place siphon tube in grounded metal pail containing
cleaning fluid.
4. Set pump to lowest possible fluid pressure, and start
pump.
5. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun until clean solvent dis-
penses.
6. Remove gun from hose. See gun manual to further
clean gun.
7. Follow Pressure Relief Procedure, page 12, and
remove fluid filter and soak in solvent. Replace filter
cap.
Corrosion Protection
Always flush the pump before the fluid dries on the dis-
placement rod. Never leave water or water-based fluid in
the pump overnight. First, flush with water or a compati-
ble solvent, then with mineral spirits. Relieve the pres-
sure, but leave the mineral spirits in the pump to protect
the parts from corrosion.
Hydraulic Systems
Carefully follow the manufacturer's recommendations on
reservoir and filter cleaning, and periodic changes of
hydraulic fluid. Use only Graco-approved hydraulic oil.
Order Part No. 169236, 5 gal. (19 liter) or 207428, 1 gal.
(3.8 liter). Do not substitute a lower grade oil or one with
a lower flash point.
• 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
connectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the
fluid being dispensed and the equipment wetted
parts.
CAUTION
Keep the hydraulic supply system absolutely clean at
all times. Blow out hydraulic lines with air and flush
thoroughly with solvent before connecting to the
hydraulic motor, to avoid introducing harmful contami-
nants into the motor. Plug the hydraulic lines immedi-
ately when they are disconnected.
Do not exceed 54°C (130°F) hydraulic oil tempera-
ture.

Troubleshooting
311826B 15
Troubleshooting
1. Relieve the pressure, page 12.
2. Check all possible causes and problems before dis-
assembling the pump.
* To determine if the fluid hose or gun is obstructed, relieve the pressure, page 12. Disconnect the fluid hose and
place a container at the pump fluid outlet to catch any fluid. Turn on the air/hydraulic power just enough to start the
pump. If the pump starts, the obstruction is in the fluid hose or gun.
Problem Cause Solution
Pump fails to operate. Restricted line or inadequate air/hydrau-
lic supply; closed or clogged valves.
Clear; increase air/hydraulic supply.
Check that valves are open.
Obstructed fluid hose or gun/valve; fluid
hose ID is too small.
Open, clear*; use hose with larger ID
Fluid dried on displacement rod. Clean; always stop pump at bottom of
stroke; keep wet-cup 1/3 filled with com-
patible solvent.
Dirty, worn, or damaged motor parts. Clean or repair; see separate motor
manual.
Pump operates, but output low on both
strokes.
Restricted line or inadequate air/hydrau-
lic supply; closed or clogged valves.
Clear; increase air/hydraulic supply.
Check that valves are open.
Obstructed fluid hose or gun/valve; fluid
hose ID is too small.
Open, clear*; use hose with larger ID
Bleeder valve open. Close.
Fluid too heavy for pump priming. Use bleeder valve, page 13; use ram.
Worn packings in lower. Replace packings.
Pump operates, but output low on down-
stroke.
Held open or worn intake valve. Clear valve; service.
Fluid too heavy for pump priming. Use bleeder valve, page 13; use ram.
Pump operates, but output low on
upstroke.
Held open or worn piston valve or pack-
ings.
Clear valve; replace packings.
Erratic or accelerated pump speed. Exhausted fluid supply. Refill and prime.
Fluid too heavy for pump priming. Use bleeder valve, page 13; use ram.
Held open or worn piston valve or pack-
ings.
Clear valve; replace packings.
Held open or worn intake valve. Clear valve; service.

Repair
16 311826B
Repair
Required Tools
• Set of socket wrenches
• Set of adjustable wrenches
• 24 in. adjustable wrench
• Torque wrench
• Thread lubricant
• Anti-seize lubricant 222955
•Loctite
®2760™or equivalent
Disconnect the Lower
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure, page 12.
2. Disconnect the air or hydraulic hose. Plug all
hydraulic hoses immediately, to prevent contamina-
tion of the hydraulic system.
3. Hold the fluid outlet fitting (AD) with a wrench to
keep it from loosening while you disconnect the fluid
hose. See FIG. 4.
4. Unscrew the coupling nut (103) from the connecting
rod adapter (105). Remove the coupling collars
(104); do not to lose or drop them. See FIG. 4.
5. Hold the tie rod flats with a wrench to keep the rods
(106) from turning. Unscrew the nuts (107). Remove
the lower (102).
6. To service the lower, refer to manual 311825, sup-
plied. To service the air or hydraulic motor, refer to
the separate motor manual, supplied.
CAUTION
Use at least two people when lifting, moving, or dis-
connecting the pump. If disconnecting the lower, be
sure to securely brace the pump, or have two people
hold it while another disconnects it.
Before disconnecting the lower (102) from the
motor (101), be sure to note the relative position of
the pump's fluid outlet to the air or hydraulic inlet of
the motor. If the motor does not require servicing,
leave it attached to its mounting.

Repair
311826B 17
Reconnect the Lower
1. Screw the connecting rod adapter (105) to the air
motor shaft. Torque as noted in FIG. 4.
2. Screw the tie rods (106) into the air motor (101).
Using a wrench on the tie rod flats, torque as noted.
3. Make sure the coupling nut (103) and coupling col-
lars (104) are in place on the displacement rod
(DR).
4. Use at least two people to hold the lower while
another reconnects it to the motor (see the CAU-
TION, page 16). Orient the pump's fluid outlet to the
air or hydraulic inlet as noted under Disconnect the
Lower. Place the lower (102) on the tie rods (106).
5. Screw the nuts (107) onto the tie rods (106) and
torque as noted in FIG. 4.
6. Screw the coupling nut (103) onto the connecting
rod adapter (105) loosely. Hold the connecting rod
adapter flats with a wrench to keep it from turning.
Use an adjustable wrench to tighten the coupling
nut. Torque as noted in FIG. 4.
7. Torque the packing nut (PN) to 135-169 N•m
(100-125 ft-lb).
8. Reconnect all hoses. Reconnect the ground wire if it
was disconnected. Fill the wet-cup (PN) 1/3 full of
Graco Throat Seal Liquid or compatible solvent.
9. Turn on the air or hydraulic power supply. On
hydraulic pumps, open the hydraulic return line
valve first, then the supply line valve. Run the pump
slowly to ensure that it operates properly.
Always use connecting rod adapter 184595 and tie
rods 184596 on hydraulic-powered pumps. Other con-
necting rod adapters and tie rods do not allow sufficient
clearance between the drip pan and coupling nut.
FIG. 4. Reconnect the Lower
1
TI8363a TI8365a
101
102
103
104
105
106
107
108
101
106
102
107
108
103
105
104
AD
PN
DR
AD
DR
PN
2
3
3
3
3
Torque to 68-81 N•m (50-60 ft-lb).
Torque to 81-89 N•m (60-66 ft-lb).
Torque to 196-210 N•m (145-155 ft-lb).
1
2
3

Parts
18 311826B
Parts
Dura-Flo Pumps with NXT Air Motors
TI8363a
101
102
103
104
105
106
107
108

Parts
311826B 19
101 102 103 104 105 106 107 108 115 116
Pump Part
No.
MOTOR;
see
311238
LOWER;
see
311825
NUT, cou-
pling
COLLAR,
coupling
ADAPTER ROD, tie NUT, hex;
5/8-11
WRENCH SHIELD,
warning
SCREW;
8-32 x 2 in.
(51 mm)
P12LCD N34LN0 222801
184096 184130 15H371 15H562 101712 184278 15H782 120094
P12LSA N34LN0 222803
P12MCD N34LT0 222801
P12MSA N34LT0 222803
P12DSA N34DN0 222803
P12ESA N34DT0 222803
P12DCD N34DN0 222801
P12ECD N34DT0 222801
P15LCD N34LN0 222796
P15LSB N34LN0 687055
P15MCD N34LT0 222796
P15MSB N34LT0 687055
P15DSB N34DN0 687055
P15ESB N34DT0 687055
P15DCD N34DN0 222796
P15ECD N34DT0 222796
P23DCD N65DN0 222801
P23ECD N65DT0 222801
P23LCD N65LN0 222801
P23LSA N65LN0 222803
P23MCD N65LT0 222801
P23MSA N65LT0 222803
P23DSA N65DN0 222803
P23ESA N65DT0 222803
P32DCD N65DN0 222796
P32ECD N65DT0 222796
P32LCD N65LN0 222796
P32LSB N65LN0 687055
P32MCD N65LT0 222796
P32MSB N65LT0 687055
P32DSB N65DN0 687055
P32ESB N65DT0 687055
Qty1112133133

Parts
20 311826B
Dura-Flo Pumps with Viscount Hydraulic Motors
TI8365a
101
102
103
104
105
106
107
108
Pump Part
No.
Ref. Nos. and Descriptions
101 102 103 104 105 106 107 108
MOTOR; see
307158
LOWER; see
311825
NUT, cou-
pling
COLLAR,
coupling
ADAPTER ROD, tie NUT, hex;
5/8-11
WRENCH
222892
235345
222796
184096 184130 184595 185596 106166 184278
222897 222805
222834 222801
222900 222803
Qty11121331