Instructions – Parts List
Parts
CARBON STEEL
Dura–Flot 1100 Pumps
With Severe–Duty Rod and Cylinder
Part No. 236932 Pump, Series A, 74:1 Ratio
with Premiert Air Motor and 236478 Displacement Pump
50.0 MPa, 500 bar (7252 psi) Maximum Fluid Working Pressure
0.67 MPa, 6.7 bar (97 psi) Maximum Air Input Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for Table of Contents.
308357G
9589A
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation/Maintenance 8. . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Chart 11. . . . . . . . . . . . . . . . . . . . . . . . .
Service 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Tools 12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the Displacement Pump 12. . . . . . .
Reconnecting the Displacement Pump 12. . . . . . . .
Displacement Pump Service 14. . . . . . . . . . . . . . . .
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
INSTRUCTIONS
D This equipment is for professional use only.
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.
Parts Drawings and Parts Lists 18. . . . . . . . . . . . . . . . . .
Pump Assembly 18. . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement Pump 19. . . . . . . . . . . . . . . . . . . . . . . .
Repair Kits 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layout 23. . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Information 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Check equipment daily. Repair or replace worn or damaged parts immediately.
D Do not exceed the maximum working pressure of the lowest rated system component. Refer to the
Technical Data on page 21 for the maximum working pressure of this equipment.
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 Do not exceed the maximum working pressure of the lowest rated system component. This equip-
ment has a 50.0 MPa, 500 bar (7252 psi) maximum working pressure.
D Do not kink or overbend hoses or use hoses to pull 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 Wear hearing protection when operating this equipment.
D Do not lift pressurized equipment.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
D Do not lift the sprayer by the lift ring when the total weight exceeds 550 lb (250 kg).
2 308357
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/valve at anyone or at any part of the body.
D Do not put your hand or fingers over the spray tip/nozzle.
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 Be sure the gun/valve trigger safety operates before spraying.
D Lock the gun/valve trigger safety when you stop spraying.
D Follow the Pressure Relief Procedure on page 8 whenever you: are instructed to relieve pres-
sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.
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, such as the air motor piston, 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.
308357 3
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/dispensed. Refer to Grounding on page 5.
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/dispensed.
D Keep the spray/dispense area free of debris, including solvent, rags, and gasoline.
D Electrically disconnect all equipment in the spray/dispense area.
D Extinguish all open flames or pilot lights in the spray/dispense area.
D Do not smoke in the spray/dispense area.
D Do not turn on or off any light switch in the spray/dispense area while operating or if fumes are
present.
D Do not operate a gasoline engine in the spray/dispense area.
D Keep a fire extinguisher in the work 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.
4 308357
Installation
Grounding
To reduce the risk of static sparking, ground the pump,
object being sprayed , and all spray/dispensing equipment used or located in the spray/dispensing area.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Be
sure to ground all of this spray/dispensing equipment.
1. Pump: loosen the grounding lug locknut (W) and
washer (X). Insert one end of a 1.5 mm2 (12 ga)
minimum ground wire (Y) into the slot in lug (Z)
and tighten the locknut securely. See Fig. 1. Connect the other end of the wire to a true earth
ground. Order Part No. 237569 Ground Wire and
Clamp.
2. Air hoses: use only electrically conductive hoses.
3. Fluid hoses: use only electrically conductive fluid
hoses.
4. Air compressor: follow manufacturer’s recommendations.
6. Fluid supply container: according to your local
code.
7. Object being sprayed: according to your local
code.
8. All solvent pails used when flushing, according to
your local code. Use only metal pails, which are
conductive, placed on a grounded surface. Do not
place the pail on a nonconductive surface, such as
paper or cardboard, which interrupts the grounding
continuity.
9. To maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the
spray gun/dispensing valve firmly to the side of a
grounded metal pail, then trigger the gun/valve.
W
X
Y
Z
5. Spray gun/dispensing valve: grounding is obtained
through connection to a properly grounded fluid
hose and pump.
0864
Fig. 1
308357 5
Installation
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and the
parts drawing.
NOTE: Accessories are available from your Graco
representative. If you supply your own accessories, be
sure they are adequately sized and pressure-rated to
meet the system’s requirements.
TYPICAL INSTALLATION
KEY
A Pump
B Cart
C Pump Runaway Valve (location)
D Air Line Lubricator (location)
E Bleed-Type Master Air Valve
(required, for pump)
F Pump Air Regulator
JK
G Air Manifold
H Electrically Conductive Air Supply Hose
J Air Line Filter
K Bleed-Type Master Air Valve
(for accessories)
L Fluid Filter (includes drain valve)
M Fluid Drain Valve (required)
MAIN AIR LINE
Fig. 2 is only a guide for selecting and installing system components and accessories. Contact your Graco
distributor for assistance in designing a system to suit
your particular needs.
N Grounded Fluid Supply Hose
P Fluid Whip Hose
R Gun Swivel
S Airless Spray Gun
T Suction Kit
Y Ground Wire (required; see page 5
for installation instructions)
Y
D
A
E
F
C
H
G
S
R
P
L
B
N
T
M
Fig. 2
6 308357
Installation
ASSEMBLE THE PUMP
Assemble the displacement pump (105) to the air
motor (101) as instructed on pages 12–13.
SYSTEM ACCESSORIES
WARNING
A bleed-type master air valve (E) and a fluid drain
valve (M) are required in your system. These
accessories help reduce the risk of serious injury,
including fluid injection and splashing of fluid in the
eyes or on the skin, and injury from moving parts if
you are adjusting or repairing the pump.
The bleed-type master air valve relieves air trapped
between this valve and the pump after the air is
shut off. Trapped air can cause the pump to cycle
unexpectedly. Locate the valve close to the pump.
Order Part No. 112730.
The fluid drain valve assists in relieving fluid pressure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient. Order Part No. 224774.
D An air line lubricator (D) provides automatic air
motor lubrication.
D A bleed-type master air valve (E) is required in
your system to relieve air trapped between it and
the air motor when the valve is closed (see the
WARNING at left). Be sure the bleed valve is easily accessible from the pump, and is located down-
stream from the air regulator. Order Part No.
112730.
D An air regulator (F) controls pump speed and out-
let pressure by adjusting the air pressure to the
pump. Locate the regulator close to the pump, but
upstream from the bleed-type master air valve.
D A pump runaway valve (C) senses when the
pump is running too fast and automatically shuts
off the air to the motor. A pump which runs too fast
can be seriously damaged.
D An air manifold (G) has a 1 in. npt air inlet. It
mounts to the pump support bracket, and provides
ports for connecting lines to air-powered accessories.
D An air line filter (J) removes harmful dirt and
moisture from the compressed air supply.
Air and Fluid Hoses
Be sure all air hoses (H) and fluid hoses (N and P) 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 (S) to allow freer gun movement.
Mounting Accessories
Mount the pump (A) to suit the type of installation
planned. Fig. 2 illustrates a cart-mounted system.
Pump dimensions and the mounting hole layout are
shown on page 23.
If you are using a floor stand, refer to its separate
manual for installation and operation instructions.
Air Line Accessories
Install the following accessories in the locations shown
in Fig. 2, using adapters as necessary:
D A second bleed-type air valve (K) isolates the air
line accessories for servicing. Locate upstream
from all other air line accessories.
Fluid Line Accessories
Install the following accessories in the locations shown
in Fig. 2, using adapters as necessary:
D A fluid filter (L) with a 60 mesh (250 micron)
stainless steel element, to filter particles from the
fluid as it leaves the pump. It includes a fluid
drain valve (M), which is required in your system
to relieve fluid pressure in the hose and gun (see
the WARNING at left).
D A gun (S) dispenses the fluid. The gun shown in
Fig. 2 is an airless spray gun for light to medium
viscosity fluids.
D A gun swivel (R) allows freer gun movement.
D A suction kit (T) allows the pump to draw fluid
from a 19 liter (5 gallon) pail.
308357 7
Operation/Maintenance
Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
Fluid under high pressure can be injected through the skin and cause
serious injury. To reduce the risk of an
injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
D are instructed to relieve the pressure,
D stop spraying/dispensing,
D check or service any of the system equipment,
D or install or clean the spray tip/nozzle.
1. Lock the spray gun/dispensing valve trigger safety.
2. Shut off the air supply to the pump.
3. Close the bleed-type master air valve (required in
your system).
4. Unlock the gun/valve trigger safety.
FLUSHING THE PUMP
The pump is tested with lightweight oil, which is left in
to protect the pump parts. If the fluid you are using
may be contaminated by the oil, flush it out with a
compatible solvent before using the pump.
WARNING
For your safety, read the warning section, FIRE
AND EXPLOSION HAZARD on page 4 before
flushing, and follow all recommendations given
there.
5. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve
to relieve pressure.
6. Lock the gun/valve trigger safety.
7. Open the drain valve (required in your system),
having a container ready to catch the drainage.
8. Leave the drain valve open until you are ready to
spray/dispense again.
If you suspect that the spray tip/nozzle 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 tip/nozzle or hose.
Packing Nut/Wet Cup
Before starting, fill the packing nut (2) 1/3 full with
Graco Throat Seal Liquid (TSL) or compatible solvent.
See Fig. 3.
2
1
1
104
Torque to 129–142 N.m
(95–105 ft–lb)
The packing nut is torqued at the factory and is ready
for operation. If it becomes loose and there is leaking
from the throat packings, you must first follow the
Pressure Relief Procedure Warning above, then
torque the nut to 129–142 N.m (95–105 ft–lb) using the
supplied wrench (104). Do this whenever necessary.
Do not overtighten the packing nut.
8 308357
9589A
Fig. 3
Operation/Maintenance
Starting and Adjusting the Pump
1. Refer to Fig. 2 on page 6. Connect the suction kit
(T) to the pump’s fluid inlet, and place the tube into
the fluid supply.
2. Be sure the air regulator (F) is closed. Then open
the pump’s bleed-type master air valve (E). Hold a
metal part of the spray gun (S) firmly to the side of
a grounded metal pail and hold the trigger open.
Now slowly open the air regulator until the pump
starts.
3. Cycle the pump slowly until all air is pushed out
and the pump and hoses are fully primed. Release
the gun trigger and engage the safety latch. The
pump should stall against pressure when the
trigger is released.
4. If the pump fails to prime properly, open the drain
valve (M). Use the drain valve as a priming valve
until the fluid flows from the valve. See Fig. 2.
Close the drain valve.
NOTE: When changing fluid containers with the hose
and gun already primed, open the drain valve (M), to
assist in priming the pump and venting air before it
enters the hose. Close the drain valve when all air has
been eliminated.
5. With the pump and lines primed, and with adequate air 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
supply is shut off.
6. Use the air regulator to control the pump speed
and the fluid pressure. Always use the lowest air
pressure necessary to get the desired results.
Higher pressures cause premature tip and pump
wear.
WARNING
To reduce the risk of overpressurizing your system,
which could result in component rupture and cause
serious injury, never exceed the specified Maximum Incoming Air Pressure to the pump (see the
Technical Data on page 21).
7. 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. A pump
runaway valve (C), which shuts off the air supply to
the pump if the pump accelerates beyond the
pre-set speed, is available. See Fig. 2 on page 6.
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 eliminate all air from the fluid system.
Shutdown and Care of the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
For overnight shutdown, relieve the pressure. Stop
the pump at the bottom of its stroke to prevent fluid
from drying on the exposed displacement rod and
damaging the throat packings.
Always flush the pump before the fluid dries on the
displacement rod. Never leave water or water-based
fluid in the pump overnight. First, flush with water or a
compatible solvent, then with mineral spirits. Relieve
the pressure, but leave the mineral spirits in the pump
to protect the parts from corrosion.
308357 9
Notes
10 308357
Troubleshooting Chart
Before servicing this equipment always make sure to
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
PROBLEM CAUSE SOLUTION
Pump fails to operate. Restricted line or inadequate air supply;
closed or clogged valves.
Obstructed fluid hose or gun/valve;
fluid hose ID is too small.
Fluid dried on the displacement rod. Clean; always stop pump at bottom of stroke;
Dirty, worn, or damaged motor parts. Clean or repair; see separate motor manual.
Pump operates, but
output low on both
strokes.
Pump operates, but
output low on downstroke.
Pump operates, but
output low on upstroke.
Erratic or accelerated
pump speed.
Restricted line or inadequate air supply;
closed or clogged valves.
Obstructed fluid hose or gun/valve;
fluid hose ID is too small.
Worn packings in displacement pump. Replace packings.
Held open or worn intake valve. Clear valve; service.
Held open or worn piston valve or packings.
Exhausted fluid supply. Refill and prime.
Held open or worn piston valve or packings.
Held open or worn intake valve. Clear valve; service.
Relieve the Pressure.
Check all possible problems and solutions before
disassembling the pump.
Clear; increase air supply.
Check that valves are open.
Open, clear*; use hose with larger ID. Hose must
be rated for 510 bar (7400 psi).
keep wet-cup 1/3 filled with compatible solvent.
Clear; increase air supply.
Check that valves are open.
Open, clear*; use hose with larger ID. Hose must
be rated for 51.0 MPa, 510 bar (7400 psi).
Clear valve; replace packings.
Clear valve; replace packings.
* To determine if the fluid hose or gun is obstructed, relieve the pressure. Disconnect the fluid hose and place a container at
the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump. If the pump starts when the air is turned
on, the obstruction is in the fluid hose or gun.
NOTE: If you experience air motor icing, call your Graco distributor.
308357 11
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
REQUIRED TOOLS
Service
5. Hold the tie rod flats with a wrench to keep the
rods from turning. Unscrew the nuts (106) from the
tie rods (107). Carefully remove the displacement
pump (105) from the motor (101).
6. Refer to page 14 for displacement pump service.
To service the air motor, refer to the separate
motor manual, supplied.
D Set of adjustable wrenches
D 15/16 in. (or 23 mm) socket wrench
D Large pipe wrench
D Torque wrench
D Rubber mallet
D O-ring pick
D Large vise
D Thread lubricant
D Thread sealant
D LoctiteR 2760t or equivalent
DISCONNECTING THE DISPLACEMENT
PUMP
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke and relieve the pressure.
2. Disconnect the air hose and fluid hose.
3. Disconnect the displacement pump (105) from the
motor (101) as follows. Be sure to note the relative
position of the pump’s fluid outlet (U) to the air inlet
(V) of the motor. If the motor does not require
servicing, leave it attached to its mounting.
CAUTION
Be sure to use at least two people when lifting,
moving, or disconnecting the pump. This pump is too
heavy for one person. If you are disconnecting the
displacement pump from a motor which is still
mounted (for example, on a wall bracket), be sure to
support the displacement pump while it is being
disconnected, to prevent it from falling and causing
injury or property damage. Do this by securely
bracing the pump, or by having at least two people
hold it while another disconnects is.
If the pump is mounted on a cart, slowly tip the cart
backward until the handle rests on the ground, then
disconnect the displacement pump.
RECONNECTING THE DISPLACEMENT
PUMP
1. Ensure that the rod adapter (102) has not loosened during maintenance. Proper torque is necessary to prevent the rod adapter from loosening
during the pump operation.
If the rod adapter (102) has loosened, remove it
and apply LoctiteR 2760t (or equivalent) to the
rod adapter and air motor piston threads.
Screw the adapter (102) into the air motor shaft.
Hold the motor shaft flats with a wrench to keep it
from turning, and torque the adapter to 312–340
N.m (230–250 ft–lb). See Fig. 4.
2. Screw the tie rods (107) into the base of the air
motor (101). Using a wrench on the tie rod flats,
torque to 129–142 N.m (95–105 ft–lb).
3. Make sure the coupling nut (103) and the coupling
collars (108) are in place on the displacement rod
(1).
4. Use at least two people to hold the displacement
pump while another reconnects it to the motor (see
the CAUTION at left). Orient the pump’s fluid
outlet (U) to the air inlet (V) as was noted in step 3
under Disconnecting the Displacement Pump.
Position the displacement pump (105) on the tie
rods (107).
5. Screw the nuts (106) onto the tie rods (107) and
torque to 129–142 N.m (95–105 ft–lb).
6. Screw the coupling nut (103) onto the connecting
rod adapter (102) 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 to 312–340 N.m (230–250 ft–lb).
7. Reconnect all hoses. Reconnect the ground wire if
it was disconnected. Fill the packing nut (2) 1/3 full
of Graco Throat Seal Liquid or compatible solvent.
4. Using an adjustable wrench (or hammer and
punch), unscrew the coupling nut (103) from the
connecting rod adapter (102). Remove the coupling collars (108). Take care not to lose or drop
them. See Fig. 4.
12 308357
8. Turn on the air supply. Run the pump slowly to
ensure that it is operating properly.
9. Before returning the pump to production, relieve
the pressure. Retorque the packing nut (2) to
129–142 N.m (95–105 ft–lb).
Service
V
3
101
102
2
1
Torque to 129–142 N.m (95–105 ft–lb)
2
Torque to 312–340 N.m (230–250 ft–lb)
Apply LoctiteR 2760t (or equivalent) to threads.
3
Fig. 4
108
103
2
104
1
107
1
106
1
1
2
105
U
9592A
308357 13
Service
DISPLACEMENT PUMP SERVICE
Disassembly
When disassembling the pump, lay out all the removed
parts in sequence, to ease reassembly.
NOTE: Repair Kit 237166 is available. For the best
results, use all the new parts in the kit. Kit parts are
marked with an asterisk, for example (3*). Kits to
convert the pump to different packing materials are
also available. Refer to page 20.
1. Place the pump lengthwise in a large vise, with the
jaws on the outlet housing (9) as shown in Fig. 5.
Using the supplied wrench (104), loosen, but do
not remove, the packing nut (2).
2. Using a pipe wrench, unscrew the intake valve
(17) from the intake housing (16). Be careful to
catch the intake ball (15) as you remove the intake
valve, so that it doesn’t fall and suffer damage.
Remove the o-ring (28) from the intake valve.
Inspect the ball and the seat (D) of the intake valve
for wear or damage. See Fig. 5.
5. Lift the cylinder (11), displacement rod (1), and
piston assembly off the intake housing (16). Remove the ball guide (27) from the intake housing,
and inspect the guide surfaces. See Fig. 6.
6. Using a rubber mallet, drive the displacement rod
(1) and piston assembly out the bottom of the
cylinder (11) until the piston comes free. Pull the
rod and piston from the cylinder, being careful not
to scratch the parts.
CAUTION
To reduce the possibility of costly damage to the rod
(1) and cylinder (11), always use a rubber mallet to
drive the rod out of the cylinder. Never use a hammer to drive the rod.
7. Shine a light into the cylinder (11) to inspect the
inner surface for scoring or wear. Remove the
o-rings (10) from the cylinder.
3. Stand the pump upright in the vise. Remove the
six long cap screws (29), using a 15/16 in. (or 23
mm) socket wrench. See Fig. 8.
4. Lift the outlet housing (9) straight up off the pump.
Be careful not to scratch the displacement rod (1)
while removing the housing. See Fig. 6.
9
1
8. Place the flats of the piston seat housing (14) in a
vise, as shown in Fig. 7. Using an adjustable
wrench, unscrew the piston ball housing (12) from
the piston seat housing. Be careful to catch the
piston ball (13) as you separate the piston seat
housing and ball housing, so that it doesn’t fall and
suffer damage.
15*
28*
2
16
17
D
11
2
1
Fig. 5
14 308357
1
Torque to 522–542 N.m (385–400 ft–lb).
2
2
Lubricate.
03986
Service
9. Examine the displacement rod (1) for scratches or
other damage. Only if the rod needs replace-
ment, unscrew it from the piston ball housing (12),
using an adjustable wrench on the flats of the rod.
10. Remove and inspect the glands and v-packings
(P) from the piston seat housing (14). Inspect the
ball (13), and the seat (E) and guides (F) on the
housing for wear or damage. See Fig. 8.
11. Unscrew the packing nut (2) from the outlet housing (9). Remove and inspect the glands and
v-packings (T).
12. Clean all parts with a compatible solvent and
inspect them for wear or damage.
9
1
1
12
1
14
1
1
11
27
16
Fig. 7
1
Torque to 386–407 N.m (285–300 ft–lb).
03793
Fig. 6
04048
308357 15
Service
Reassembly
1. If it was necessary to remove the piston ball
housing (12) from the displacement rod (1), clean
the threads of the rod and the ball housing, and
apply thread sealant. Screw the ball housing onto
the rod, hand tight. Place the flats of the piston ball
housing in a vise and torque the rod to 386–407
N.m (285–300 ft–lb). See Fig. 8.
2. Place the piston packings on the piston seat
housing (14) in the following order, with the lips
of the v-packings facing up: the female gland
(4*), one PTFE v-packing (3*), four leather
v-packings (5*), and the male gland (6*). See the
Piston Packing Stack Detail in Fig. 8.
NOTE: To convert the pump to a different packing
material, see page 20.
3. Place the flats of the piston seat housing (14) in a
vise. Place the ball (13*) on the piston seat (E).
Screw the piston ball housing (12) onto the piston
seat housing hand tight, then torque to 386–407
N.m (285–300 ft–lb). See Fig. 7.
4. Lubricate the throat packings and place them in
the outlet housing (9) in the following order, with
the lips of the v-packings facing down: the
male gland (6*), four leather v-packings (5*), one
PTFE v-packing (3*), and the female gland (4*).
See the Throat Packing Stack Detail in Fig. 8.
NOTE: To convert the pump to a different packing
material, see page 20.
5. Lubricate the threads of the packing nut (2), and
loosely install it in the outlet housing (9).
7. Place the intake ball guide (27) in the intake housing (16). Set the intake housing in the vise, facing
upright. See Fig. 6.
8. Install the o-ring (10*) on the bottom of the cylinder
(11). Lubricate the o-ring. Place the cylinder on the
intake housing (16). Tap the top of the displacement rod (1) with a rubber mallet, to seat the
cylinder.
9. Install the o-ring (10*) on the top of the cylinder
(11). Lubricate the o-ring. Set the outlet housing
(9) on the cylinder.
10. Apply thread lubricant to the six long cap screws
(29). Install them through the outlet housing (9)
and thread them loosely into the intake housing
(16). Tighten the screws oppositely and evenly
with a socket wrench, then torque to 244–264 N.m
(180–195 ft-lb). See Fig. 8.
11. Place the pump lengthwise in the vise, with the
jaws on the outlet housing (9) as shown in Fig. 5.
12. Install the o-ring (28*) on the intake valve (17).
Lubricate the o-ring and the threads of the intake
valve. Place the intake ball (15*) in the intake
housing (16), then screw the intake valve into the
intake housing handtight.
13. Using a pipe wrench, torque the intake valve (17)
to 522–542 N.m (385–400 ft–lb). See Fig. 5.
6. Lubricate the piston packings. Slide the displacement rod (1) and piston assembly down into the
cylinder (11). The cylinder is symmetrical, so either
end may face up. Use a rubber mallet to drive the
rod into the cylinder, until the piston seat housing
(14) is near the bottom of the cylinder.
16 308357
14. Torque the packing nut (2) to 129–142 N.m
(95–105 ft–lb).
15. Reconnect the displacement pump to the air motor
as explained on page 12.
1
Torque to 129–142 N.m (95–105 ft–lb).
2
Torque to 522–542 N.m (385–400 ft–lb).
3
Torque to 386–407 N.m (285–300 ft–lb).
4
Lubricate.
5
Apply thread sealant.
6
Lips face up.
7
Lips face down.
Throat Packing Stack Detail
2 (Ref)
*4
*3
4
7
*5
4
7
Service
8
See Throat Packing Detail at left.
9
See Piston Packing Detail at left.
10
Torque to 244–264 N.m
(180–195 ft–lb).
29
10
1
2
1
9
T
8
*6
9 (Ref)
Piston Packing Stack Detail
12 (Ref)
11 (Ref)
14 (Ref)
*6
6
6
*5
4
*3
4
*4
27 (Ref)
*10 (Ref)
*10
4
11
5
3
*13
12
F
E
P
9
14
3
*10
4
27
*28
4
15*
D
Fig. 8
16
2
17
2
03984
308357 17
Parts
Part No. 236932 Pump, Series A
74:1 Ratio, with Premier Air Motor
101
102{
Ref.
No. Part No. Description Qty.
101 222800 AIR MOTOR, Premier
See 308213 for parts 1
102{ 184583 ADAPTER, connecting rod 1
103{ 184098 NUT, coupling 1
104{ 112887 WRENCH, spanner 1
105 236478 PUMP, displacement
See page 19 for parts 1
106{ 106166 NUT, hex; M16 x 2.0 3
107{ 184382 ROD, tie; 380 mm (14.96 in.)
shoulder to shoulder 3
108{ 184129 COLLAR, coupling 2
{ These parts are included in Connection Kit 235416.
{
107
{106
108{
103{
104{
105
9592A
18 308357
Displacement Pump 236478, Series A
Parts
Ref Part
No. No. Description Qty
1 189317 ROD, displacement; stainless steel 1
2 222995 PACKING NUT; carbon steel 1
8Y 172479 TAG, warning (not shown) 1
9 237183 HOUSING, outlet; ductile iron 1
10* 109499 SEAL; PTFE 2
11 190221 CYLINDER; stainless steel 1
12 184513 HOUSING, ball, piston; carbon steel 1
13* 100279 BALL, piston; chrome steel;
0.875 in. (22.2 mm) dia. 1
14 222951 HOUSING, seat, piston valve;
stainless steel w/tungsten carbide seat 1
2
29
*Throat
Packing
Stack
(see page 20)
9
Ref Part
No. No. Description Qty
15* 108001 BALL, intake; stainless steel;
1.5 in. (38.1 mm) dia. 1
16 190218 HOUSING, intake; ductile iron 1
17 237495 VALVE, intake; ductile iron
w/tungsten carbide seat 1
20 101754 PLUG, pipe, socket hd; 3/8 npt 1
27 190228 GUIDE, intake ball; carbon steel 1
28* 164782 O-RING; PTFE 1
29 112921 SCREW, cap, hex hd; 5/8–11 unc–2a;
10.5 in. (266.7 mm) long 6
* These parts are included in Standard Repair Kit 237166
and Conversion Kits 237167 and 237168, which may be
purchased separately. See page 20.
Y Replacement Danger and Warning labels, tags and cards
are available at no cost.
10*
11
20
1
12
*13
*Piston
Packing
Stack
(see page 20)
14
10*
27
16
28*
15*
17
03983
308357 19
Repair Kits
Standard Repair Kit 237166
(Leather Packings and PTFE Backup)
Ref Part
No. No. Description Qty
3* 109306 V-PACKING; PTFE 2
4* 184201 GLAND, female; carbon steel 2
5* 184306 V-PACKING; leather 8
6* 184251 GLAND, male; carbon steel 2
Kit also includes items 10, 13, 15, and 28 (see page 19).
THROAT PACKINGS:
LIPS FACE DOWN
*4
PISTON PACKINGS:
LIPS FACE UP
*6
3*
*5
*6
LUBRICATE PACKINGS
*5
*4
0805
0806
3*
Packing Conversion Kit 237167
(PTFE Packings)
Ref Part
No. No. Description Qty
3* 109306 V-PACKING; PTFE 10
4* 184201 GLAND, female; carbon steel 2
6* 184251 GLAND, male; carbon steel 2
Kit also includes items 10, 13, 15, and 28 (see page 19).
THROAT PACKINGS:
LIPS FACE DOWN
PISTON PACKINGS:
LIPS FACE UP
Packing Conversion Kit 237168
(UHMWPE and Leather Packings)
Ref Part
No. No. Description Qty
3* 109256 V-PACKING; UHMWPE 6
4* 184201 GLAND, female; carbon steel 2
5* 184306 V-PACKING; leather 4
6* 184251 GLAND, male; carbon steel 2
Kit also includes items 10, 13, 15, and 28 (see page 19).
THROAT PACKINGS:
LIPS FACE DOWN
*4
*3
*6
5*
LUBRICATE PACKINGS
PISTON PACKINGS:
LIPS FACE UP
*6
*3 5*
*4
0805
0806
*4
*3
*6
20 308357
LUBRICATE PACKINGS
*6
*3
*4
0805
0806
Technical Data
(MODEL 236932 PREMIER PUMP)
Category Data
Ratio 74:1
Maximum fluid working pressure 500 bar (7252 psi)
Maximum air input pressure 6.7 bar (97 psi)
Pump cycles per 3.8 liters (1 gal.) 14
Maximum flow at 60 cycles/min. 15.9 liters/min (4.2 gpm)
Air motor piston effective area 800 cm@ (124 in.@)
Stroke length 120 mm (4.75 in.)
Displacement pump effective area 11 cm@ (2.79 in.@)
Maximum pump operating temperature
(ambient and fluid)
Air inlet size 3/4 npsm(f)
Fluid inlet size 2 in. npt(f)
Fluid outlet size 1 in. npt(f)
Weight approx. 109 kg (240 lb)
Wetted parts Carbon Steel; Chrome Steel, Zinc and Nickel Plating;
82_C (180_F)
440 and 17–4 PH Grades of Stainless Steel;
Alloy Steel; Tungsten Carbide; Ductile Iron; PTFE;
Glass-Filled PTFE; Leather
Sound Pressure Levels (dBa)
(measured at 1 meter from unit)
Input Air Pressures at 15 cycles per minute
0.28 MPa, 2.8 bar
Air Motor
Premier 82.5 82.4 83.2 83.0
(40 psi)
0.48 MPa, 4.8 bar
(70 psi)
0.63 MPa, 6.3 bar
(90 psi)
0.7 MPa, 7 bar
(100 psi)
Sound Power Levels (dBa)
(tested in accordance with ISO 9614–2)
Input Air Pressures at 15 cycles per minute
0.28 MPa, 2.8 bar
Air Motor
Premier 90.6 90.6 93.0 95.9
(40 psi)
0.48 MPa, 4.8 bar
(70 psi)
0.63 MPa, 6.3 bar
(90 psi)
0.7 MPa, 7 bar
(100 psi)
308357 21
Technical Data
(MODEL 236932 PREMIER PUMP)
Performance Charts: Premier Pumps
To find Fluid Outlet Pressure (psi/MPa/bar) at a specific fluid flow
(lpm/gpm) and operating air 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 0.7 MPa, 7 bar (100 psi) air pressure
B 500 kPa, 4.9 bar (70 psi) air pressure
C 300 kPa, 2.8 bar (40 psi) air pressure
Test Fluid: No. 10 Weight Oil
Fluid Outlet Pressure
psi
MPa,bar
8000
56.0, 560
7000
49.0, 490
6000
42.0, 420
5000
35.0, 350
4000
28.0, 280
FLUID PRESSURE
3000
21.0, 210
2000
14.0, 140
1000
7.0, 70
gpm
liters/min.
0
01234567
14 56 98
A
B
C
cycles/min.
28 42 84
7.6
FLUID FLOW
70
15.2 22.8 26.5
19.011.43.8
To find Pump Air Consumption (m#/min. or scfm) at a specific fluid
flow (lpm/gpm) and air pressure (psi/MPa/bar):
1. Locate desired flow along bottom of chart.
2. Read vertical line up to intersection with selected air consumption
curve (dashes). Follow left to scale to read air consumption.
Air Consumption
scfm
m#/min.
300
8.40
250
7.00
200
5.60
150
4.20
100
AIR CONSUMPTION
2.80
50
1.40
gpm
liters/min.
14 56 98
0
01234567
cycles/min.
28 42 84
7.6
FLUID FLOW
70
15.2 22.8 26.5
19.011.43.8
A
B
C
22 308357
Dimensions
G
Mounting Hole
Layout
Premier Pumps
135.0 mm
(5.3 in.)
C
A
67.5 mm
(2.7 in.)
116.9 mm
(4.6 in.)
87.9 mm
(3.5 in.)
Three
M16 x 2.0
Holes
101.5 mm
(4.0 in.)
Three 3/8–16
Mounting Studs
50.7 mm
(2.0 in.)
B
D
F
E
9589A
Pump Model A B C D E F G
236932 1146.9 mm
(45.15 in.)
746.0 mm
(29.37 in.)
400.9 mm
(15.78 in.)
413.0 mm
(16.26 in.)
2 in. npt(f) 1 in. npt(f) 3/4 npsm(f)
9655A
308357 23
Graco Standard Warranty
Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the
date of sale by an authorized Graco distributor 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 procedures concernées.
Graco Information
TO PLACE AN ORDER, contact your Graco distributor, or call one of the following numbers
to identify the distributor closest to you:
1–800–328–0211 Toll Free
612–623–6921
612–378–3505 Fax
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.
24 308357
MM 308357
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
www.graco.com
PRINTED IN USA 308357 09/1994, Revised 00/2006
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