Graco 311688L User Manual

Instructions/Parts List

TI2125A

®

Triton

3D150

311688L

Diaphragm Pump

Used to pump waterborne and solvent-based paints and catalysts. For professional use
only.

Part No. 253704, Series B

3:1 Ratio Air-operated Double Diaphragm Pump, with BSPP Fittings

Part No. 253705, Series B

EN

3:1 Ratio Air-operated Double Diaphragm Pump, with NPT Fittings

100 psi (0.7 MPa, 7 bar) Maximum Air Input Pressure

300 psi (2.1 MPa, 21 bar) Maximum Fluid Working Pressure

Important Safety Instructions

Read all warnings and instructions in this manual.
Save these instructions.

II 2 G

Table of Contents

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

General Information . . . . . . . . . . . . . . . . . . . . . . 5

Tightening Threaded Fasteners Before First Use 5

Mounting the Pump . . . . . . . . . . . . . . . . . . . . . . . 6

Air Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fluid Suction Line . . . . . . . . . . . . . . . . . . . . . . . . 7

Fluid Outlet Line . . . . . . . . . . . . . . . . . . . . . . . . . 7

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pressure Relief Procedure . . . . . . . . . . . . . . . . 10

Flushing the Pump Before First Use . . . . . . . . . 10

Starting and Adjusting the Pump . . . . . . . . . . . 10

Pump Shutdown . . . . . . . . . . . . . . . . . . . . . . . . 10

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Flushing and Storage . . . . . . . . . . . . . . . . . . . . 11

Tightening Threaded Connections . . . . . . . . . . 11

Preventive Maintenance Schedule . . . . . . . . . . 11

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Prepare the Pump for Repair . . . . . . . . . . . . . . 13

General Repair Notes . . . . . . . . . . . . . . . . . . . . 13

Fault Indications . . . . . . . . . . . . . . . . . . . . . . . . 13

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . 13

Replace the Diaphragms . . . . . . . . . . . . . . . . . 14

Helicoil Installation . . . . . . . . . . . . . . . . . . . . . . 15

Repair the Air Valve . . . . . . . . . . . . . . . . . . . . . 16

Repair the Shaft and Bearings . . . . . . . . . . . . . 18

Fluid Inlet and Outlet Adapters . . . . . . . . . . . . . 18

Replace the Ball Check Valves . . . . . . . . . . . . . 20

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Performance Chart . . . . . . . . . . . . . . . . . . . . . . . . 25

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 28

2 311688L

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 symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.

Warning

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.

• This equipment is for professional use only.

• Read all instruction manuals, tags, and labels before operating the equipment.

• Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.

• Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

• Check equipment daily. Repair or replace worn or damaged parts immediately.

• Do not exceed the maximum working pressure of the lowest rated system component. Refer to the

Technical Data on page 24 for the maximum working pressure of this equipment.

• Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Techni-
cal Data section of all equipment manuals. Read the fluid and solvent manufacturer's warnings.

• Do not use hoses to pull equipment.

• 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).

• Wear hearing protection when operating this equipment.

• Comply with all applicable local, state, and national fire, electrical, and safety regulations.

PRESSURIZED EQUIPMENT HAZARD

Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin and
cause serious injury.

• Do not point the gun at anyone or at any parts of the body.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Follow the Pressure Relief Procedure on page 10 whenever you are instructed to relieve pressure;
stop spraying; clean, check, or repair the equipment; and install or clean the spray nozzle.

• Tighten all fluid connections before operating the equipment.

• Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.

311688L 3

Warnings

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.

• Ground the equipment and the object being sprayed. Refer to Grounding on page 9.

• If there is any static sparking or you feel an electric shock while using this equipment, stop the
equipment immediately. Do not use the equipment until you identify and correct the problem.

• Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid being
sprayed.

• Keep the work area free of debris, including solvent, rags, and gasoline.

• Eliminate all ignition sources such as pilot lights, cigarettes, and static arcs from plastic drop cloths.
Do not plug in or unplug power cords or turn lights on or off in the spray area.

TOXIC FLUID HAZARD

Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.

• Know the specific hazards of the fluid you are using.

• Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.

• Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.

• If a diaphragm fails, fluid is exhausted along with the air. When pumping hazardous fluids, place the
pump in an appropriate container to catch the fluid if a diaphragm ruptures.

MOVING PARTS HAZARD

Moving parts, such as the diaphragm shaft, can pinch or amputate your fingers.

• Before servicing the equipment, follow the Pressure Relief Procedure on page 10 to prevent the
equipment from starting unexpectedly.

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

4 311688L

Installation

Installation

General Information

• FIG. 2 is only a guide for installing system compo­nents and accessories. It is not an actual system
design. Contact your Graco distributor for assis­tance in designing a system to suit your particular
needs.

• Always use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply
your own accessories, be sure they are adequately
sized and pressure-rated for your system.

• Reference numbers and letters in parentheses refer
to the reference numbers in the figures and the
parts list on page 22.

Tightening Threaded Fasteners
Before First Use

NOTE: Before using pump, loosen fluid cover bolts (38,

39) 1-2 turns and then retorque to 16 N•m (12 ft-lb).

See the Repair section for torque specifications.

• After unpacking the pump and before using it for the
first time, check and retorque all diaphragm cover
bolts (38, 39).

• After the first day of operation, retorque the fasten­ers again.

• As a general guideline, retorque fasteners every two
months.

311688L 5

Installation

Floor Mount

Hexagonal screw (2 required)

Hexagonal
screw
(2 required)

Compressed air
connection

Fluid
Inlet

Cylinder
Housing (54)

Fluid
Outlet

Wall Mount

Wall
Mount
Bracket

TI2133A 2

TI2469A

Mounting the Pump

• For ease of operation and service, mount the pump
so the air inlet, fluid inlet, and fluid outlet ports are
easily accessible.

• Mount the pump in a well-ventilated area with suffi­cient clearance on all sides for operator access and
servicing.

• The pump must be mounted horizontally as shown
in FIG. 1. Be sure that the pump is level in all direc­tions and that the cylinder housing (54) is positioned
on the bottom. See FIG. 1.

• The pump can be floor mounted or mounted on a
wall using mounting kit 246495.

• Be sure the mounting can support the weight of the
pump, hoses, and accessories as well as the stress
caused during operation. The pump has two mount­ing holes for 0.31 in. (8 mm) screws. See the
Dimension drawing on page 26.

Wall mount using kit 246495:

1. Use the bracket (15C022) as a template to drill 2

0.38 (9.6 mm) diameter holes in the wall.

2. Loosely attach bracket (15C022) to the wall with
anchors and screws (8 mm) long enough to prevent
the bracket from vibrating during operation.

3. Remove bracket from the wall and fasten it to the
pump using the 4 screws (116899) and 1 lock
washer (100028) included in the kit.

4. The lock washer must be used in the unpainted hole
to ensure proper grounding of the bracket.

5. Mount the bracket with the pump attached to the
wall and tighten.

FIG. 1. Mounting the Pump

6 311688L

Installation

Air Line

1. Install the air line accessories as shown in FIG. 2.
Be sure the air line supplying the accessories is
grounded.

a. The fluid pressure can be controlled with either

an air regulator (F) to control the air into the
pump, or with a fluid regulator (H) to control the
fluid out of the pump.

b. Install a bleed-type master air valve (B) close to

the pump. This valve is required in your system
to relieve air trapped between it and the pump
when the valve is closed. Trapped air can cause
the pump to cycle unexpectedly which could
result in serious injury including splashing in the
eyes or on the skin, or injury from moving parts.
Be sure the bleed valve is easily accessible
from the pump, and is located downstream from
the air regulator.

c. Install a second air valve (E) upstream from all

air line accessories to isolate them during clean­ing and repair.

d. Install an air line filter (D) to remove contami-

nates such as dirt, moisture, and oil from the
compressed air supply.

2. The air valve does not require lubrication.

• For maximum suction lift (wet and dry) information,

see Technical Data on page 24.

• Use an agitator to prevent fluid from settling out.
Part number 245081 Agitator Kit (accessory) is
available.

Fluid Outlet Line

1. Use electrically conductive fluid hoses (P). See FIG.

2. Screw the fluid fitting into the pump outlet (N)
snugly while supporting the outlet with a wrench.
See Technical Data on page 24 to determine the
fluid outlet size of your pump.

2. Install a fluid regulator (H) at the pump fluid outlet to
control fluid pressure, if desired. See Air Line step
1a for an alternative method to control pressure.

3. Install a fluid drain valve (J) near the fluid outlet.

A fluid drain (J) valve is required in your system to
relieve pressure in the hose if it is plugged. The drain
valve reduces the risk of serious injury, including
splashing in the eyes or on the skin, or contamination
from hazardous fluids when relieving pressure. Install
the valve close to the pump fluid outlet. To use the
valve as a circulation valve, connect a tube (K)
between the valve and pail.

3. Install a grounded, flexible air hose between the

accessories and the pump air inlet. See Technical
Data on page 24 to determine the air inlet size of
your pump. Use a minimum 1/2 in.(13 mm) ID air
hose.

Fluid Suction Line

• See Technical Data on page 24 to determine the

fluid inlet size of your pump.

• Use conductive hoses (see FIG. 2). Screw the suc­tion line into the pump inlet snugly while supporting
the inlet with a wrench. Use a compatible liquid
thread sealant on connections to prevent air from
entering the fluid line.

311688L 7

Some systems may require installation of a pressure
relief valve at the pump outlet to prevent overpressur­ization and rupture of the pump or hose.

Thermal expansion of fluid in the outlet line can cause
overpressurization. This can occur when using long
fluid lines exposed to sunlight or ambient heat, or
when pumping from a cool to a warm area (for exam­ple, from an underground tank).

Overpressurization can also occur if the pump is
being used to feed fluid to a piston pump and the
intake valve of the piston pump does not close, caus­ing fluid to back up in the outlet line.

NOTICE

Installation

R

B

C

D

E

F

K

A

L

G

S

M

W

Key:

A TRITON 3D150 Pump
B Bleed-type master air

valve (required for pump)
C Air supply line
D Air line filter
E Air line shutoff valve
F Pump air regulator
G Gun air regulator (used in

spray system only)
H Fluid pressure regulator

(used in spray system

only)
J Drain/circulation valve
K Drain tube
L Suction tube
M Pump fluid inlet
N Pump fluid outlet
P Fluid hose (shown

connected to gun in spray

system)
R Gun air hose (used in

spray system only)
S Spray gun (used in spray

system only)
T Pump air inlet
U Agitator (used in spray

system only)
W Ground wire

W

H

A

M

L

T

K

N

J

H

N

T

P

J

U

TI2127A

TI2373A

FIG. 2. Typical Installation

8 311688L

Installation

Y

X

TI2126A

Grounding

Before operating the pump, ground the system as
explained below. Read the warnings on page 4.

Ground all of this equipment:

• Pump: use a ground wire and clamp. See FIG. 3.
Loosen the grounding screw (X). Insert one end of a

12 ga (1.5 mm2) minimum ground wire (Y) under the
clamp and tighten the screw securely. Connect the
other end of the wire to a true earth ground. For a
ground wire and clamp, order Part No. 222011.

• Air and fluid hoses: Use only electrically conductive
hoses.

• Air compressor: Follow manufacturer’s recommen­dations.

• All fluid pails used when flushing: Follow your 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 the grounding continuity.

• Fluid supply drum: Follow your local code.

FIG. 3. Grounding the Pump

311688L 9

Operation

Operation

Pressure Relief Procedure

Read the warnings on page 3, and follow the Pres­sure Relief procedure below whenever you:

• are instructed to relieve pressure

• stop spraying

• check or service any of the equipment

• install or clean the fluid nozzle.

1. Shut off the air to the pump.

2. Open the dispensing valve, if used.

3. Open the fluid drain valve to relieve all fluid pres­sure, having a container ready to catch the
drainage.

Flushing the Pump Before First
Use

The pump was tested in oil. If oil could contaminate the
fluid you are pumping, flush the pump thoroughly with a
compatible flushing fluid. Follow the steps under Start-

ing and Adjusting the Pump.

7. If the fluid hose has a dispensing device, hold it
open while continuing with the following step.

8. Slowly open the air regulator (F) until the pump
starts to cycle. Allow the pump to cycle slowly until
all air is pushed out of the lines and the pump is
primed.

If you are flushing, run the pump long enough to thor­oughly clean the pump and hoses. Close the air regula­tor. Remove the suction tube (L) from compatible
flushing fluid and place it in the fluid to be pumped.

NOTE: Operating the pump dry for extended periods or
operating at pressures higher than the recommended
maximum input air pressure will reduce diaphragm life.

Pump Shutdown

Short Term Shutdown

For a short term shutdown, relieve the pressure (see
procedure on this page).

Long Term Shutdown

For a long term shutdown, such as several hours or
overnight:

1. Flush the pump thoroughly.

Starting and Adjusting the Pump

1. Be sure the pump is properly grounded. Refer to

Grounding on page 9.

2. Check all fittings to be sure they are tight. Be sure to
use a compatible liquid thread sealant on all male
threads. Re-torque diaphragm cover bolts (38, 39)
before start-up.

3. Place the suction tube (L) in the fluid to be pumped.

4. Place the end of the fluid hose (P), see FIG. 2, into
an appropriate container.

5. Close the fluid drain valve (J).

6. With the pump air regulator (F) closed, open the
bleed-type master air valve (B).

10 311688L

2. Leave compatible flushing fluid in the pump.

3. Relieve the pressure (see procedure on this page).

Maintenance

Maintenance

Lubrication

NOTICE

Lubrication of the pump is not required. Oil is
exhausted through the muffler, which could contami­nate the fluid supply or other equipment. Excessive
lubrication can also cause the pump to malfunction.

Flushing and Storage

Flush the pump often enough to prevent the fluid you
are pumping from curing, drying, or freezing in the pump
and damaging it. Follow the Pressure Relief Proce-
dure on page 10 before storing it for any length of time.
Use a compatible flushing fluid.

Tightening Threaded
Connections

1. Before each use, check all hoses for wear or dam­age, and replace as necessary.

2. Check to be sure all threaded connections are tight
and leak-free.

3. Check and re-torque all screws and fasteners at
least every two months.

Preventive Maintenance
Schedule

• Establish a preventive maintenance schedule,
based on the service history of the pump. This is
especially important for prevention of spills or leak­age due to diaphragm failure.

311688L 11

Troubleshooting

Troubleshooting

NOTE: Relieve the pressure (page 10) before checking

or servicing the equipment.

Problem Cause Solution

Pump cycles at stall or fails to hold
pressure at stall.

Pump will not cycle, or cycles once
and stops.

Pump operates erratically. Clogged suction line. Inspect; clear.

Air bubbles in fluid. Loose suction line. Tighten.

Pump running irregularly. Stroke fre­quency dropping, coming to stand­still.

Air escapes continually. Damaged air valve cup (15) or seat. Replace damaged parts. See page

Pump does not start, or pressure
fluctuates.

Worn check valve balls (26), seats
(31), or ball guides (32).

Stuck or dirty air valve. Disassemble and clean air valve.

Check valve ball (26) severely worn
and wedged in seat (31).

Check valve ball (26) wedged in seat
(31) due to overpressurization.

Clogged fluid dispensing valve. Relieve pressure and clear valve.

Pinched hose line. Check lines.

Sticky or leaking check valves. Clean or replace balls (26) and seats

Ruptured diaphragm (9). Replace. See page 13.

Restricted exhaust. Remove restriction.

Ruptured diaphragm (9). Replace. See page 13.

Worn parts. Replace worn parts. Check com-

Icing caused by: compressed air too
moist, stroke frequency too high,
local temperature too low.

Foreign matter inside pump. Check air filter.

Worn check valve seats. Replace. See page 20.

Inlet strainer blocked, maximum suc­tion exceeded, hose or seal defec­tive.

Contaminated fluid. Pump installed or
operated incorrectly.

NOTE: Relieve the pressure (page 10) before checking
or servicing the equipment.

Replace. See page 20.

See page 16. Use filtered air.

Replace ball and seat. See page 20.

Replace. See page 20. Do not
exceed the maximum fluid working
pressure, see page 24.

(31). See page 20.

pressed air supply.

Remove ice by changing operating
conditions.

16.

Clean strainer. Replace defective
parts.

Check fluid supply. Follow installation
and operation instructions in this
manual.

12 311688L

Repair

Repair

Prepare the Pump for Repair

1. Flush the pump if possible, page 11.

2. Relieve the pressure, page 10.

3. Disconnect the air and fluid hoses.

4. Remove the pump from its mounting and take it to
the work bench.

General Repair Notes

• A qualified technician should make all repairs.

• Inspect and clean all parts thoroughly before reas­sembly.

• Use only genuine Graco replacement parts, avail­able from your Graco distributor.

• Be careful not to damage sealing surfaces.

• Replace all o-rings removed from the pump.

Fault Indications

During operation, check for indications of worn or dam­aged parts, such as:

• major pressure fluctuations

• change in the pump’s operating sound

• irregular operation.

Always replace worn or damaged parts immediately to
prevent additional damage.

Tools Required

• 3, 4, and 6 mm allen wrenches

• 12, 19, and 22 mm open end wrenches

• internal snap ring pliers

• helicoil thread insert installation tool

• Follow all lubrication, torque, and repair notes in the
repair procedures.

• Do not use silicone or silicone-based grease.

• Fluid cover fasteners have a thread-locking adhe­sive patch applied to the threads. If this patch is
excessively worn, the screws may loosen during
operation. Replace screws with new ones, or apply
medium-strength (blue) thread locker to the threads.

• o-ring pick

• needlenose pliers

• vise with soft jaws

311688L 13

Repair

Replace the Diaphragms

Wear gloves when removing or assembling the dia­phragms to reduce the risk of cuts.

Diaphragm Repair Kit 246011 is available. Parts
included in the kit are marked, for example (9*). For the
best results, replace both diaphragms.

Always replace the ball check seals (29) whenever the
fluid covers are removed. These seals are included in
each of the repair kits.

1. Prepare the pump for repair of the cylinder-side dia­phragm.

a. Remove the 6 bolts (39) and fluid cover (37)

from the housing side of the pump.

b. Press on the exposed diaphragm (9) to fully

extend the cylinder-side diaphragm.

c. Replace the housing-side cover and tighten the

6 bolts.

NOTE: The housing-side cover must be reassembled
tightly enough to prevent the shaft from turning when
the cylinder-side diaphragm is loosened.

2. Repair the cylinder-side diaphragm.

a. Remove the 6 bolts (38) and fluid cover (37)

from the cylinder side.

3. Prepare the pump for repair of the housing-side dia­phragm.

a. Press on the cylinder-side diaphragm so that it

protrudes into the cylinder. This will fully extend
the diaphragm on the housing side.

b. Install new ball check seals (29*).

c. Make sure the helicoil (56) is in place in each

bolt hole. See Helicoil Installation, page 15.

d. Replace the fluid cover and install the 6 bolts.

Torque the bolts to 16 N•m (12 ft-lb). Use blue
Loctite or equivalent as needed. See General
Repair Notes, page 13.

4. Repair the housing-side diaphragm.

a. Remove the 6 bolts and the fluid cover from the

housing side.

b. Remove the ball check seals.

c. The exposed diaphragm should be in the fully

extended position (protruding out from the cylin­der). If it is not, reassemble the cylinder-side
seals and cover and repeat step 3.

d. Grip the housing-side diaphragm firmly and

unscrew it from the rod by hand.

e. Install a new diaphragm (9*) firmly, by hand.

f. Install new ball check seals (29*).

b. Remove the ball check seals (29).

c. The exposed diaphragm should be in the fully

extended position (protruding out from the cylin­der). If it is not, reassemble the cylinder-side
seals and cover and repeat step 1.

d. Grip the cylinder-side diaphragm firmly and

unscrew it from the rod by hand.

e. Install a new diaphragm (9*) firmly, by hand.

14 311688L

g. Make sure the helicoil (56) is in place in each

bolt hole. See Helicoil Installation, page 15.

h. Replace the fluid cover and install the 6 bolts

(39*). Torque the bolts to 16 N•m (12 ft-lb). Use
blue thread locker as needed. See General
Repair Notes, page 13.

Spare diaphragms should be stored in a cool, dry place
and be used within 8 months to prevent diaphragm fail­ure due to material aging.

Repair

ti2129c

Torque to 16 N•m (12 ft-lb). Use blue
Loctite or equivalent as needed. See
General Repair Notes, page 13.

1

29*

†‡◆

1

37

54

7

29*

†‡◆

29*

†‡◆

38

37

29*

†‡◆

39

Cylinder Side 9*

Housing Side 9*

1

1

56

■

Helicoil Installation

To replace broken or removed helicoils (56), order Heli­coil Repair Kit 24U929. Also order Helicoil Installation
Tool, Graco PN 24U930.

1. Screw the helicoil insert onto the tool. Engage the
tang of the insert in the driving contour of the tool.

2. Position the insert and tool squarely over the tapped
hole.

3. Use slight pressure to rotate the tool until the insert
is engaged in the tapped hole. Continue to rotate
the tool until the top of the insert is 1/2 turn past the
first fully formed thread.

4. Break the tang off cleanly at the notch in the bottom
coil. Place a rod or screw driver against the tang
and strike it sharply with a hammer.

FIG. 4 Replace the Diaphragms

311688L 15

Repair

fluid outlet arrow

“POM”
marking

ti15227a

Note the orientation of the air valve plate (16) relative
to the fluid outlet arrow, with “POM” marking up

Repair the Air Valve

Air Valve Repair Kit 245066 is available. Parts included
in the kit are marked, for example (33†). For the best
results, use all parts in the kit.

Disassembly

1. Prepare the pump for repair, page 13.

2. Remove the air valve sheet metal cover (36) and felt
dampener (34).

3. Unscrew the cylinder screws (21).

4. Remove the valve cover (20) with the flat gasket
(19†).

5. Use two screwdrivers to lift out the air valve plate
(16†) and replace o-rings (17†◆) and (18†◆).
Remove two o-rings (55).

6. Remove the air valve cup (15†).

7. Remove one retaining clip (14) with pliers DIN
5256C nominal size 12-25 diameter.

8. Screw cylinder screw (21) into the plug (12) and pull
it out. Replace o-ring (13†◆).

9. Repeat steps 8 and 9 for clip and plug on opposite
side.

Reassembly

NOTE: Lubricate all o-rings when reassembling the

pump.

1. Assemble in reverse order.

NOTE: Orient the new flat gasket (19) on the air valve
plate (16) so that the channels in the plate are com­pletely covered.

2. Replace all parts with the new ones supplied in kit

245066.

NOTE: Four profile seals (29) are provided in kit
245066 as in all 308HP kits. These seals need to be
replaced only if the fluid covers are removed.

10. Reach into the housing and press out the carriage
(10).

11. Replace o-rings (11†◆).

16 311688L

ti2130B

12

Lubricate.

Torque to 3.1 N•m (28 in-lb)

1

2

13†

◆

14

19†

◆

20

21

34

36

44

10

11†

◆

14

15†

17†

◆

18†

◆

16†

14

12

13†

◆

11†

◆

1

1

1

1

1

1

2

55

Repair

FIG. 5. Repair the Air Valve

311688L 17

Repair

Repair the Shaft and Bearings

NOTE: Parts marked with a (♦ ) are included in Shaft

repair kit 233841. For the best results, use all parts in
the repair kit.

Parts marked with a (❖) are included in Bearing repair kit
15J647.

Disassembly

1. Remove the diaphragms. See page 13.

2. Disassemble the air valve. See page 16.

3. Remove the housing (54).

• Sleeve clamp (6) is visible inside the air valve

cavity. Spread the sleeve clamp (6) with pliers
DIN 5254A, nominal size 19, and at the same
time, slide the shaft assembly (7) out from the
end where housing (54) was removed.

NOTE: The valve carriage (5) will remain free inside the
diaphragm housing.

Fluid Inlet and Outlet Adapters

If the fluid inlet adapter (1a) or outlet adapter (1c) have
been removed, apply sealant primer and high strength
anaerobic sealant to the adapter threads before install­ing. Be sure to install new o-rings (1b, 1d). Torque the
adapters to 12.5-14.7 ft-lb (17-20 N•m).

4. Remove clip (42) and bearing (3).

Reassembly

1. Replace o-ring (2) in bearing, lubricate internal
o-rings.

2. Install new bearing (3) and clip (42) inside housing
(54).

3. Insert shaft assembly (7) into diaphragm housing (1)
through the valve carriage, spreading the sleeve
clamp to allow full insertion. Be careful to release
sleeve clamp (6) in the correct location along the
shaft to engage it in all three grooves.

4. Reinstall the housing (54).

5. Replace o-rings on the carriage, air valve plate, and
plugs and reinstall the air valve section. (See page

16.)

6. Replace the diaphragms (page 13).

7. Replace the ball check seals (29) (page 20) and
reinstall the fluid covers.

18 311688L

Lubricate.

Torque to 12 ft-lb (16 N•m).

Use medium-strength (blue)

thread locker or equivlaent as needed.

See General

Repair Notes, page 13.

Torque to 28 in-lb (3.1 N•m).

Apply sealant primer and high-strength anaerobic
sealant. Torque to 12.5-14.7 ft-lb (17-20 N•m).

1

2

4

5

4

2

20

13

†◆

14

12

†◆11

10

†◆11

1

†‡◆29

*9

37

39

34

38

37

*9

54

7

◆

29*

†‡◆

*

†‡◆

29

†◆

19

†16

18

†◆

17

†◆

6

15

†

5

29*

†‡◆

36

44

4

21

1

1

1

1

1

1

2

1

55

42

❖

❖

43

3

❖

◆

❖

2

42

❖

❖

43

❖

3

2

◆

❖

3

❖

◆

❖

2

43

❖

❖

42

ti2131f

◆

8

1d

1c

1a

1b

5

5

56

■

Repair

FIG. 6. Repair the Shaft

311688L 19

Repair

Replace the Ball Check Valves

Ball Check Valve Repair Kit 245067 is available. Parts
included in the kit are marked with a (‡). For the best
results, use all parts in the kit.

Disassembly

1. Remove fluid covers (see page 13). Do not remove
housing (54).

2. Remove the inlet and outlet ball checks (26-32).
Note that the orientation of the inlet check parts is
different than the outlet check parts. (See FIG. 7.)

NOTE: If the inlet seats (31) are difficult to remove, drive
them out from the opposite side using a brass rod and
hammer.

3. Replace all parts provided in Kit 245067.

Reassembly

1. Reinstall the inlet and outlet ball checks on one side
of the pump. The inlet and outlet checks are assem­bled differently, install them exactly as shown in FIG.

7.

2. Install one fluid cover loosely to prevent the ball
checks from falling out.

NOTE: Align the through holes in the housing with each
other and with the covers.

3. Turn the pump over and install the ball checks on
the opposite side, exactly as shown.

4. Reinstall the fluid covers. (See page 13.)

20 311688L

Repair

ti2128c

Torque to 12 ft-lb (16 N•m).

Use

medium-strength (blue) thread

locker or equivlaent as needed.

See General Repair Notes, page

13.

Align.

1

2

1

2

Inlet Ball
Checks

Outlet Ball
Checks

29

‡

‡32

‡26

‡28

‡29

1

32

‡

26

‡

31

‡

30

‡✖

27

‡26

‡32

‡28

‡29

30

‡✖

31

‡

26

‡

32

‡

29

‡

1

56

■

FIG. 7. Replace the Ball Check Valves

311688L 21

Parts

1

★

32

‡

26‡

31

‡

5

*9

23

33

22

12

10

15

†

44

34

†◆

19

†

16

†◆

18

†◆

17

20

*9

◆❖

2

4

‡

27

14

‡

26

35

‡

28

‡

32

*

†‡◆

29

†◆

11

†◆

13

24

40

39

54

7

◆

6

29*

†‡◆

37

38

37

36

21

30

‡✖

41

25

◆

8

55

†

ti2132j

43

❖

3

❖

❖

42

◆❖

2

43

❖

3

❖

❖

42

43

❖

3

❖

2

◆❖

45

42

❖

1b

1a

1c

1d

56

■

Parts

Part No. 253704, Series B
Part No. 253705, Series B

22 311688L

Part No. 253704 BSPP, Series B
Part No. 253705 NPT, Series B

Parts

Ref.

Part No. Description Qty

No.

1 ★ HOUSING, diaphragm; includes

items 1a-1d

1a 15A306 ADAPTER, fluid inlet, for 253704 1

198852 ADAPTER, fluid inlet, for 253705 1
1b 198857 O-RING 1
1c 15A290 ADAPTER, fluid outlet, for 253704 1

198855 ADAPTER, fluid outlet, for 253705 1
1d 117036 O-RING 1
2 ◆❖ O-RING 3
3 ❖ BEARING 3
4 117158 O-RING 1
5 197645 CARRIAGE, valve 1
6 15A289 CLAMP, sleeve 1
7 ◆ SHAFT, pump, diaphragm 1
8 ◆ O-RING 1
9 * DIAPHRAGM 2
10 197649 CARRIAGE 1
11 †◆ O-RING 2
12 197651 PLUG 2
13 †◆ O-RING 2
14 197653 CLIP, id 2
15 † CUP, air valve 1
16 † PLATE, air valve 1
17 †◆ O-RING 2
18 †◆ O-RING 1
19 †◆ GASKET, flat 1
20 197659 COVER, valve 1
21 116474 SCREW, cap, socket head; M4x20

Torque to 3.1 N•m (2.3 ft-lb)
22 117160 VALVE, safety 1
23 197661 DAMPENER, noise 1
24 197662 PLATE, screw 1
25 116475 SCREW, cap, socket head; M4x12 2
26 ‡ BALL, matrix 4
27 ‡ SEAL, profile 2
28 ‡ SEAT, valve, outlet 2
29 *†‡◆ SEAL, profile 4
30 ‡✖ O-RING 2
31 ‡ SEAT, valve, inlet 2
32 ‡ GUIDE, ball 4
33 197670 DAMPENER, felt, side 1
34 197671 DAMPENER, felt, air inlet side 1

Ref.

Part No. Description Qty

No.

35 15J372 COVER, exhaust 1

1

36 15J374 COVER, sheet metal, air valve 1
37 15A282 COVER, fluid 2
38 117240 BOLT, cap, socket head; M8x70

Torque to 16 N•m (12 ft-lb)

39 115264 BOLT, cap, socket head; M8x18

Torque to 16 N•m (12 ft-lb)

40 15A286 ADAPTER, pump diaphragm, for

253704

198832 ADAPTER, pump diaphragm, for

253705
41 116343 CLAMP, grounding 1
42 ❖ CLIP, ID, C-spring 3
43 ❖ O-RING 3
44 116595 SCREW, M4 button head 2
45 111307 WASHER (used with #41, 116343) 1
46▲ 188621 LABEL, warning (not shown) 1
54 258001 HOUSING, cylinder 1
55 † O-RING 2

■

56

★ Included in Diaphragm Housing Repair Kit.

Order Kit 261665 for 253704 pumps and 261666
for 253705 pumps.

◆ Included in Shaft Repair Kit 233841.

❖ Included in Bearing Repair Kit. Order Kit 15J647.

* Included in Diaphragm Repair Kit 246011.

4

† Included in Air Valve Repair Kit 245066.

‡ Included in Ball Check Valve Repair Kit 245067.

✖ Available in 10-pack kit 15D564.

■ Available in Helicoil Repair Kit 24U929 (quantity

16). Also order Helicoil Insert Tool 24U930.

▲ Replacement Warning labels, signs, tags, and

cards are available at no cost.

Helicoil 12

6

6

1

1

311688L 23

Technical Data

Technical Data

Category Data

Maximum fluid working pressure 300 psi (2.1 MPa, 21 bar)

Maximum air input pressure 100 psi (0.7 MPa, 7 bar)

Ratio 3:1

Maximum permissible stroke frequency in cycles/min 20

Volume per cycle (double stroke) 5 oz/cycle (150 cc/cycle)

Operating temperature range 50-176°F (10-80°C)

Dry suction lift 5 ft (1.5 m)

Wet suction lift 21 ft (6.5 m)

Air inlet size 1/4 npt (253705); 3/8 BSPP (253704)

Fluid inlet size 3/4 npt (253705); M26x1.5 (253704)

Fluid outlet size 3/8 npt (253705); 3/8 BSPP (253704)

Weight (approximate) 28 lb (12.7 kg)

Wetted parts stainless steel, acetal, fluorocarbon, PTFE, nylon

Sound Pressure Levels in dB(A) at 50 cpm (measured at 1 meter from unit)

Inlet Air Pressure Sound Pressure

29 psi (0.2 MPa, 2.0 bar) 72

58 psi (0.4 MPa, 4.0 bar) 76

87 psi (0.6 MPa, 6.0 bar) 78

100 psi (0.7 MPa, 7.0

bar)

80

24 311688L

Performance Chart

Cycles per minute

Outlet Flow in gallons per minute

Outlet Pressure in PSI

Air Flow in SCFM

40 psi

70 psi

100 psi

40 psi (.27 MPa, 2.7 bar)

70 psi (.48 MPa, 4.8 bar)

100 psi (.69 MPa, 6.9 bar)

Triton performance test, 40, 70, 100 psi (.27, .48, .69 MPa; 2.7, 4.8, 6.9 bar)

Performance Chart

311688L 25

Dimensions

234 mm

184 mm

(7.2 in.)

104 mm
(4.1 in.)

(9.2 in.)

Fluid Inlet;
253705 3/4 npt

253704 M26x1.5

Fluid Outlet;

253705 3/8 npt

253704 3/8 BSPP

9 mm (0.35 in.)

102 mm

(4.0 in.)

66 mm

(2.6 in.)

diameter

mounting holes

Air Inlet

253705 1/4 npt
253704 3/8 BSPP

TI2133A 1 TI2133A 2

Dimensions

26 311688L

Dimensions

311688L 27

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.
For patent information, see www.graco.com/patents.

TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: [phone] or Toll Free: 1-800-328-0211 Fax: [phone]

All written and visual data contained in this document reflects the latest product information available at the time of publication.

GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS, MN 55440-1441 • USA

Copyright 2006, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.

Graco reserves the right to make changes at any time without notice.

Original instructions. This manual contains English. MM 311688

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

www.graco.com

Rev. L - February 2014