Graco 25T818 Gebrauchs- und Pflegehandbuch

3A8571A

Instructions-Repair-Parts

12 VDC EGP

On-Demand Pump

For pumping non-flammable fluids, including motor oils, hydraulic fluid, and antifreeze. Do

not use to pump water. For professional use only.

Not approved for use in explosive atmospheres or hazardous (classified) locations.

25T818 Gear Pump

3.8 gpm (14.4 lpm)

300 psi (2.07 MPa, 20.7 bar) Maximum Working Pressure

Important Safety Instructions

Read all warnings and instructions in this

manual before using the equipment.

Save these instructions.

Contents

2 3A8571A

Contents

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

Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Component Identification . . . . . . . . . . . . . . . . . . 7

Pump Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

System Plumbing. . . . . . . . . . . . . . . . . . . . . . . . . 9

Mount Pump on Tank with Suction Tube . . . . . . . 9

Electrical Installation . . . . . . . . . . . . . . . . . . . . . 10

Priming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pressure Relief Procedure . . . . . . . . . . . . . . . . . 11

Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . 12

Thermal Induced Pressure Relief . . . . . . . . . . . . 12

Recycling and Disposal . . . . . . . . . . . . . . . . . . . . . 13

End of Product Life . . . . . . . . . . . . . . . . . . . . . . 13

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Replace/Clean Suction Screen P/N 133377 . . . 16

Outlet Assembly Kit P/N 133413 . . . . . . . . . . . . 17

Pump Housing Assembly P/N 133374 . . . . . . . 19

Clean and Inspect Pump Gears. . . . . . . . . . . . . 22

Clean and Inspect Pressure Relief

Valve Assembly . . . . . . . . . . . . . . . . . . . . . . 26

Pump Outlet Check Valve Replacement with

Thermal Relief P/N 133097 . . . . . . . . . . . . . 27

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Kits and Accessories . . . . . . . . . . . . . . . . . . . . . . . 30

Pump Performance Chart . . . . . . . . . . . . . . . . . . . 31

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Technical Specifications . . . . . . . . . . . . . . . . . . . . 33

California Proposition 65 . . . . . . . . . . . . . . . . . . . . 33

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 34

Warnings

3A8571A 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

FIRE AND EXPLOSION HAZARD

When flammable fluids are present in the work area, such as gasoline and windshield wiper fluid, be

aware that flammable fumes can ignite or explode. To help prevent fire and explosion:

• Use equipment only in well-ventilated area.

• Eliminate all ignition sources, such as cigarettes and portable electric lamps.

• Ground all equipment in the work area.

• Keep work area free of debris, including rags and spilled or open containers of solvent and gasoline.

• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.

• Use only grounded hoses.

•Stop operation immediately if static sparking occurs or you feel a shock. Do not use equipment

until you identify and correct the problem.

• Keep a working fire extinguisher in the work area.

BURN HAZARD

Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe

burns:

• Do not touch hot fluid or equipment.

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not operate the unit when fatigued or under the influence of drugs or alcohol.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system

component. See Technical 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.

• 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.

Warnings

4 3A8571A

PRESSURIZED EQUIPMENT HAZARD

Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and cause

serious injury.

• Follow the Pressure Relief Procedure when you stop spraying/dispensing and before cleaning,

checking, or servicing equipment.

• Tighten all fluid connections before operating the equipment.

• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.

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

Typical Installation

3A8571A 5

Typical Installation

The installations shown in FIG. 1 - FIG. 3 are only guides for selecting and installing system components. Contact

your local Graco Distributor for assistance with planning a system to suit your needs.

NOTE: The output line fluid pressure should not exceed 200 psi (1.38 MPa, 13.8 bar) while pumping the fluid.

Exceeding this pressure can cause the motor to cycle on and off repeatedly.

The output pressure varies at the time of pump shut off. It is determined by many factors including: hose length,

type of fittings used, and the speed that the outlet valve is closed. If pressure sensitive devices are installed

downstream from the pump, an external pressure relief/bypass must be installed in order to vent excess pressure

back to the tank.

FIG. 1: Typical Installation - Option 1: Pump and Dispense Valve

Typical Installation

6 3A8571A

FIG. 2: Typical Installation - Option 2: Pump with Hose Reel

FIG. 3: Typical Installation - Option 3: Pump with More Than One Hose Reel

Typical Installation

3A8571A 7

Component Identification

Key:

A Motor with relay

B Pressure switch

C Pressure relief valve

D Outlet check valve

G Inlet check with thermal relief

H Outlet 1/2 npt

J Pump

K Power Switch

FIG. 4

Typical Installation

8 3A8571A

Pump Wiring

FIG. 5

Installation

3A8571A 9

Installation

Grounding

NOTE: The reference numbers in the following

instructions refer to Parts, page 28.

System Plumbing

The On-Demand pump delivers a constant output flow,

even with a varying load.

It is important that the system plumbing be of adequate

size so that the back pressure does not exceed 200 psi

(1.38 MPa, 13.8 bar).

All plumbing and hoses used in the installation should

have a minimum pressure rating of 325 psi (2.24 MPa,

22.4 bar).

If the system pressure drop at the rated pump flow is

greater than, or close to, the pressure switch setting,

the motor will cycle on and off when the dispense valve

is opened to dispense fluid. If this happens, reduce

system pressure by using a larger diameter hose or by

using a less restrictive valve.

Graco recommends using 1/2 in. ID hose to keep the

working pressure low while the dispense valve is being

triggered. The output line fluid pressure should not

exceed 200 psi (1.3 8 MPa, 13.8 bar) while pumping

fluid.

The pump design includes a self-contained pressure

relief valve (C), Component Identification, page 7.

When activated, the valve relieves pressure back to the

tank.

Mount Pump on Tank with

Suction Tube

1. Install the bung adapter (15) in the tank bung and

tighten.

2. Use a 3/4 in. (19 mm) steel or PVC pipe with a

3/4 npt pipe threads on one end as a suction tube.

3. Measure the length from the top of the bung

adapter to the bottom of the tank. Cut the suction

tube length to 1/2 in. (13 mm) less than this

measurement.

4. Apply pipe thread sealant to suction tube threads

and install the pipe into the pump inlet.

5. Insert suction tube assembly through the bung

adapter and lower the pump onto the bung

adapter.

6. Position the pump so that the outlet port is in the

desired position. Tighten the swivel nut (20) on the

pump to the bung adapter.

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.

NOTICE

Never allow the pump to operate dry. Make sure that

the pump has fluid in it when the pump is initially

installed. Do not run the pump for more than five (5)

minutes with the pump discharge blocked. Do not

operate the pump continuously more than 30 minutes

in one (1) hour. Failure to follow these instructions can

result in damage to the pump.

Installation

10 3A8571A

Electrical Installation

Motor current rating: 60 amps full load. Use 8 AWG or

larger for supply wires.

1. Turn the power switch OFF.

2. Use an appropriate size ring terminal to attach the

black (negative) supply wire to the negative post

near the back of the motor. Ensure that the existing

small black wire remains on the post.

Use an appropriate size ring terminal to connect the

red (positive) supply wire to the relay post at the

front of the motor. This post is the one closest to

the pump inlet and outlet. Do not connect the

positive supply wire directly to the positive post of

the motor, or the motor will run continuously.

Ensure that the small red wire remains on the front

post (FIG. 6).

Priming

1. Attach a priming hose to the outlet of the pump.

Insert the opposite end of the hose into the tank

through the fill opening.

2. Turn the power switch ON. The pump should prime

in a few seconds.

NOTE: If priming does not start:

Remove the priming plug (21) from the pump

housing.

Using an oil can, fill the pump with 8 oz. (0.24 L) of

oil.

Replace the priming plug (21).

Turn the power switch ON. The pump should prime

in a few seconds.

Once the pump is primed, the inlet check valve will

prevent loss of prime.

3. When the pump starts to prime, turn the power

switch OFF.

4. Disconnect the priming hose.

Attach system plumbing to the pump outlet.

FIG. 6

Connect positive

wire to this post

FIG. 7

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