Graco 25P031 User manual

3A6844B
EN
Instructions
Stainless Steel 10:1 Pump
For use with EcoQuip 2™vapor abrasive blast equipment. Only use with water or water
with additives to inhibit corrosion or mold. For professional use only.
Model 25P031
1100 psi (7.5 MPa, 75 bar) Maximum Fluid Working Pressure
100 psi (0.68 MPa, 6.8 bar) Maximum Air Working Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual and in your EcoQuip 2 system
manual before using the equipment. Save
all instructions.
WLD

23A6844B
Contents
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Component Identification . . . . . . . . . . . . . . . . . . . . 5
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fill the Wet Cup . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Preventive Maintenance Schedule . . . . . . . . . . . 6
Tighten Threaded Connections . . . . . . . . . . . . . . 6
Wet Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Disconnect the Displacement Pump Lower . . . . . 9
Connect the Displacement Pump Lower . . . . . . . 9
Disconnect the Air Motor . . . . . . . . . . . . . . . . . . 10
Connect the Air Motor . . . . . . . . . . . . . . . . . . . . 10
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
25P031 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Kits and Accessories . . . . . . . . . . . . . . . . . . . . . . . 12
Tube Guard Kit (25P158) . . . . . . . . . . . . . . . . . . 12
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical Specifications . . . . . . . . . . . . . . . . . . . . 15
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 16
Related Manuals
Manual in
English Description
3A6825 EcoQuip 2™Dual Line Abrasive Blast
System
3A6845 Stainless Steel Pump Lower
3A6846 Externally Piloted Air Motor

Warnings
3A6844B 3
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
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 Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and
create safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• 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.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, 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.
• Engage trigger lock when not dispensing.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking,
or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.

Warnings
43A6844B
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent, in work area can ignite or explode. To help prevent fire and
explosion:
• Use equipment only in well ventilated areas.
• Abrasive material exiting blast nozzle can generate sparks. When flammable liquids are used near
the blast nozzle or for flushing or cleaning, keep the blast nozzle at least 20 feet (6 meters) away
from explosive vapors.
• Ground all equipment in the work area. See Grounding instructions (ATEX systems only).
• Keep work area free of debris, including solvent, rags and gasoline.
• Keep a working fire extinguisher in the work area.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
WARNING

Component Identification
3A6844B 5
Component Identification
Key:
A Ground Screw
B Enclosed Wet Cup
C Wet Cup Fill Port
D Fluid Outlet
E Fluid Inlet
F Pump Lower
G Outlet Housing
H Displacement Rod
K Tie Rod
L Coupling Nut
M Tie Rod Nut
NAirMotor
S Sight Glass
T Muffler
FIG. 1: Component Identification
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6
7

Setup
63A6844B
Setup
Grounding
Pump and air motor: Grounded through the fasteners
that connect the pump bracket to the system frame. The
frame of the system must be connected to a true earth
ground.
If the frame is not grounded, connect a ground wire and
clamp (Part 238909, purchased separately) to the
provided ground screw (A). The wire and clamp must be
connected to a true earth ground.
Fill the Wet Cup
Before operating the pump, fill the wet cup port (C) half
full with Graco Throat Seal Liquid (TSL) or a compatible
water-based lubricant. Refer to (page 14) for wetted
components.
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
Always de-pressurize the system before starting any
repair procedures. Follow the Pressure Relief
Procedure in your system manual.
Maintenance
Preventive Maintenance
Schedule
The operating conditions of your system determine how
often maintenance is required. Establish a preventative
maintenance schedule by recording when and what kind
of maintenance is needed, then determine a regular
schedule for checking your system.
Tighten Threaded Connections
Before each use, check all hoses for wear or damage.
Replace as necessary. Check that all threaded
connections are tight and leak-free.
Wet Cup
Fill the wet cup half-full of Graco TSL. Verify the level of
TSL daily.
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
FIG. 2
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76/
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.

Troubleshooting
3A6844B 7
Troubleshooting
1. Follow Pressure Relief Procedure, page 6, before
checking or repairing the pump.
2. Check all possible problems and causes before
disassembling the pump.
Problem Cause Solution
Pump output is low on both strokes. Air supply lines are restricted. • Clear any obstructions from the
air lines.
• Verify that all shutoff valves are
open.
• Increase the pressure, but do not
exceed the maximum working
pressure.
Fluid supply is empty. Refill the water tank. See system
manual.
Fluid outlet line or valves are
clogged.
Clear the fluid outlet line and valves
of any obstructions.
Throat packings are worm. Replace the throat packings.
Air pressure is insufficient or the air
valves are closed or clogged.
Open and clean the air valves.
Enclosed wet cup is too loose. Tighten the enclosed wet cup.
Pump output is low on only one
stroke.
Piston packings are worn. Replace the piston packings.
The ball or seat inside of the piston
check valve is worn.
Replace the ball or seat.
No output. Ball check valves are worn or
damaged.
Check and repair the ball check
valves.
Pump operates erratically. Fluid supply is empty. Refill and reprime the pump.
Ball check valves are held open or
worn.
Clear any obstructions from the ball
check valves. Repair any worn ball
check valves.
Piston packings are worn. Replace the piston packings.
The pump “bounces” at the top of
the stroke.
The bottom pilot valve or bottom
pilot line fittings are leaking or
damaged.
Verify that the pilot line is fully
engaged into the press-to-connect
fittings. Verify that the fittings are
tightened to 10 in-lb (1.1 N•m). Do
not over-tighten.
Replace any damaged pilot valves
or pilot line fittings. Refer to your air
motor manual.

Troubleshooting
83A6844B
The pump “bounces” at the bottom
of the stroke.
The top pilot valve or top pilot line
fittings are leaking or damaged.
Verify that the pilot line is fully
engaged into the press-to-connect
fittings. Verify that the fittings are
tightened to 10 in-lb (1.1 N•m). Do
not over-tighten.
Replace any damaged pilot valves
or pilot line fittings. Refer to your air
motor manual.
Pump will not operate. Air supply lines are restricted. Clear any obstructions from the air
lines. Verify that all shutoff valves
are open. Increase the pressure, but
do not exceed the maximum working
pressure.
Fluid supply is empty. Refill the fluid supply and reprime
the pump.
Fluid outlet line or valves are
clogged.
Clear the fluid outlet line and valves
of any obstructions.
Air pressure is insufficient or the air
valves are closed or clogged.
Open and clean the air valves.
Air motor is not operating properly. Refer to your air motor manual.
Mineral deposits have dried on the
displacement rod.
Refer to your pump lower manual.
• Clean the pump displacement
rod.
• Check or replace the throat
packings.
• Always stop the pump at the
bottom of the stroke and keep the
wet cup filled with TSL.
Problem Cause Solution

Repair
3A6844B 9
Repair
Disconnect the Displacement
Pump Lower
1. Perform the Pressure Relief Procedure, page 6.
2. Disconnect fluid hoses.
3. Unscrew the tie rod nuts (4) from the tie rods (2).
4. Unscrew the coupler (5) and remove the coupler
collars (6).
5. Carefully pull the displacement pump lower (3) off of
the air motor (1).
6. Refer to:
• Your pump lower manual for pump repair and
maintenance instructions.
•Disconnect the Air Motor, page 10, for air motor
removal instructions.
Connect the Displacement
Pump Lower
1. Rotate the pump lower (3) so that the fluid outlet (7)
faces the direction shown in FIG. 3 and then install
the displacement pump lower (3) on the tie rods.
2. Screw the tie rod nuts (4) onto the tie rods (2).
Tighten the tie rod nuts evenly. Torque the nuts to
15-20 ft-lb (20-27 N•m).
3. Install the coupler nut (5) and the collars (6) onto the
displacement rod of the pump lower and then
connect to the air motor rod.
4. Hold the flats of the air motor (1) rod with a wrench.
Then use another wrench to tighten the coupling nut
(5). Torque to 75-80 ft-lb (31-35 N•m).
5. Reconnect all fluid hoses.
6. If the ground wire is in use, verify that the ground
wire is still connected.
7. Fill wet-cup (B) half full of Graco TSL.
FIG. 3
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7

Repair
10 3A6844B
Disconnect the Air Motor
1. Disconnect the Displacement Pump Lower, page
9.
2. Remove the tie rods (2) from the air motor (1).
3. Disconnect the air hose and the DataTrak cable.
4. Use a socket to remove the four mounting screws
(MS).
5. Lift the air motor (1) out of the mounting bracket.
6. Refer to your air motor manual for repair
instructions.
Connect the Air Motor
1. Place the air motor (1) into the mounting bracket.
2. Install the four mounting screws (MS). See FIG. 4.
3. Connect the air hose and the DataTrak cable.
4. Screw the tie rods (2) into the bottom cover of the
air motor (1). Torque the tie rods to 5-10 ft-lb (1-13.5
N•m).
5. Connect the Displacement Pump Lower, page 9.
FIG. 4
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06