Graco 260550 Operation manual

312010 rev.B

Instructions - Parts List

On-Demand Pump

For pumping non-flammable fluids including motor oils, hydraulic

fluid, and antifreeze. Do not use to pump water.

Model 260550, 2.3 gpm (9 lpm), 115 VAC

370 psi (2.59 MPa, 25.9 bar) Maximum Working Pressure

Patent No. 6,662,970

Important Safety Instructions

Read all warnings and instructions in this

manual. Save these instructions. See

Table of Contents on page 2.

Warnings

2312010B

Contents

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

System Plumbing . . . . . . . . . . . . . . . . . . . . . . . . 4

Mounting Pump on Tank . . . . . . . . . . . . . . . . . . . 5

Connection Hose . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . 5

Priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Warnings

The following general warnings are for the setup, use, grounding, maintenance, and repair of this

equipment. Additional, more specific warnings may be found throughout the body of this manual

where applicable. Symbols appearing in the body of the manual refer to these general warnings.

When these symbols appear throughout the manual, refer back to these pages for a description

of the specific hazard.

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.

• Keep work area free of debris, including rags and spilled or open containers of sol-

vent and gasoline.

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

are present.

• Ground all equipment in the work area.

• Use only grounded hoses.

• If there is static sparking or you feel a shock, stop operation immediately. Do not

use equipment until you identify and correct the problem.

• Keep a fire extinguisher in the work area.

ELECTRIC SHOCK HAZARD

Improper grounding, setup, or usage of the system can cause electric shock.

• Turn off and disconnect power at main switch before disconnecting any cables and

before servicing equipment.

• Connect only to grounded power source.

• All electrical wiring must be done by a qualified electrician and comply with all local

codes and regulations.

Warnings

312010B 3

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

PRESSURIZED EQUIPMENT HAZARD

Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the

eyes or on skin and cause serious injury.

•FollowPressure Relief Procedure in this manual, when you stop 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 immedi-

ately.

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

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

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

rated system component. See Technical Data in all equipment manuals.

• Use fluids and solvents that are compatible with equipment wetted parts. See Tech-

nical Data in all equipment manuals. Read fluid and solvent manufacturer’s warn-

ings. For complete information about your material, request MSDS forms from

distributor or retailer.

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

authorized replacement parts only.

• Do not alter or modify equipment.

• Use equipment only for its intended purpose. Call your distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and

hot surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

BURN HAZARD

Equipment surfaces and fluid that’s heated can become very hot during operation. To

avoid severe burns, do not touch hot fluid or equipment. Wait until equipment/fluid has

cooled completely.

WARNING

Installation

4312010B

Installation

This On-Demand dispensing pump is a posi-

tive displacement gear pump. The motor is a

totally enclosed 115 VAC unit, with sealed

bearings, and requires minimal maintenance.

When unpacking, check for shipping damage.

Report any shipping damage to delivering car-

rier immediately. See Parts, page 9.

System Plumbing

The On-Demand pump delivers a constant

output flow even with a varying load. It is

important the system plumbing be of adequate

size to handle the rated pump flow at a pres-

sure drop that is less than maximum rated

pressure for the pump model used. All plumb-

ing and hoses used in the installation should

have a pressure rating compatible with the

pump.

Flow and pressure switch settings

If the system pressure drop at the rated pump

flow is greater than the pressure switch setting,

the motor will cycle on and off when the hose

valve is opened to dispense fluid. If this hap-

pens, reduce system pressure by using a

larger diameter hose or using a less restrictive

valve.

Model No. Pressure Switch

Setting Output

Flow Rate

260550 370 psi (2.59

MPa, 25.9 bar)

2.3 gpm

(8.9 lpm)

Installation

312010B 5

Mounting Pump on Tank

1. Install supplied bung adapter fitting (12)

into the tank bung port and tighten.

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

with 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 pipe into pump inlet.

5. Insert suction tube assembly through bung

adapter and lower pump onto the bung

adapter.

6. Position the pump so that the outlet port is

in the desired position. Tighten the swivel

nut on the pump to the bung adapter.

Connection Hose

A flexible hose must be used to connect the

pump outlet to solid plumbing. The pump outlet

port is a -12 JIC 37 degree flare male fitting.

Electrical Installation

The pump uses a 115 VAC, single phase, 60

Hz motor. The electrical circuit supplying the

motor must be on a circuit breaker and be

rated to carry a minimum current greater than

the motor full load current.

Motor current rating: 10.6 amps full load

1. Turn power switch OFF.

2. Remove conduit box cover by removing

screws in the opposite corner of cover. A

1/2 in. (13 mm) conduit opening is provided

on the right side of the conduit box just

below the pressure switch.

3. Connect the 115 VAC to the black wire in

the conduit box.

4. Connect the neutral supply wire to the two

white wires in the conduit box. Make sure

both white wires are connected. The small

diameter wire is the pressure switch.

5. Connect ground wire to the motor housing

using the green screw in the motor housing

inside the conduit box.

6. Replace conduit cover, making sure gasket

is in place.

7. Finish wiring the electrical circuit to the

breaker box.

Operation

6312010B

Priming

1. Attach the connection hose to the outlet of

the pump. Insert the opposite end of the

hose into the tank through the fill opening.

2. Turn power switch ON. The pump should

prime in a few seconds. If priming does not

start, see steps 4-6.

3. When pumps starts to prime, turn power

switch OFF. Go to step 7.

4. If priming does not start, remove the outlet

fitting (18) by disconnecting the small diam-

eter sensing hose (17) from the outlet fitting

and remove the fitting.

5. Fill the outlet port of the pump to within 1/2

in. (13 mm) of the top.

6. Replace the outlet fitting and reconnect the

sensing hose. Repeat step 2. Once the

pump is primed the inlet check valve will

prevent loss of prime.

7. Attach the connection hose to the system

plumbing.

Operation

The on-demand dispensing pumps sense the

pump outlet pressure and turn the pump on or

off depending on the pressure. When a dis-

pensing valve is opened, the pressure in the

system drops and the pump will start pumping

fluid. When the dispensing valve is closed, the

pressure increases and the pump will stop.

1. To start the pump, turn power switch ON.

Power switch is located on the back side of

the motor.

2. Place the outlet of the dispensing valve into

the fill tube of the vehicle.

3. Open the dispensing valve to the full open

position until the desired amount of fluid

has been dispensed.

4. To stop dispensing, close the dispensing

valve.

When system is not in use, always turn power

switch OFF. Failure to do so can result in a

spill if a hose ruptures or a leak occurs in the

system plumbing. If a leak occurs, pressure

will drop in the system signaling the pump to

turn on.

See Parts, page 9 for reference numbers.

Troubleshooting

312010B 7

Troubleshooting

Problem Cause Solution

Motor runs but pump will not

prime.

Dirt under pressure relief valve

or seal.

Remove pressure relief valve

and inspect, clean, or replace if

damaged.

Oil depth too high to prime. See Priming Pump, page 6.

Worn or damaged gears. Remove cover and inspect

gears. Replace if worn or

damaged.

Oil level low. Refill tank.

Cover seal damaged. Replace if worn or damaged.

Air leak in suction tube. Inspect all joints in suction

tube, make sure all joints have

sealant applied.

Air lock in system. This may occur if filter or meter

or automatic shut-off nozzle is

used. If this occurs, fill pump

and meter with fluid through

top of pump.

Motor does not run at proper

speed.

Check electric connections.

Ensure supply voltage is at the

proper level.

Oil leaking in motor mount. Faulty or damaged motor shaft

seal.

Replace shaft seal (4).

Motor shaft worn. Replace motor (5) if shaft has

groove worn in seal area.

Unit pumps but output flow is

low.

Air leak in suction tube. Check to make sure all joints in

suction tube are sealed.

Suction tube too close to tank

bottom.

Suction tube must have a 2 in.

(51 mm) minimum clearance.

Tank empty. Refill tank.

Tank not vented. Tank must be vented to atmo-

sphere.

Worn or damaged gears. Remove cover and inspect

gears (3). Replace if worn or

damaged.

Damaged motor. Replace motor (5).

Clogged hose or nozzle. Inspect and clean.

Troubleshooting

8312010B

Motor stalls when nozzle is

closed.

Bypass relief valve is stuck. Inspect relief valve, making

sure ball is free. Replace if

damaged.

Low supply voltage. Check supply voltage.

Gears damaged and binding. Inspect gears. Gears should

turn freely. Replace if dam-

aged.

Faulty pressure switch. Replace pressure switch (20).

Motor overheating. Gears binding. Check to make sure gears turn

freely on shaft.

Clogged hose or nozzle. Inspect and clean if required.

Operating pump more than 30

minutes continuous duty.

Limit operation to 30 minutes

per hour.

Switch will not turn pump on. Blown fuse or tripped breaker. Replace fuse or reset breaker.

Electrical problem. Check that supply voltage is

proper and getting to pump.

Defective pressure switch (20). Check and replace if defective.

Damaged or defective motor. Check motor (5), replace if

damaged or defective.

Outlet pressure above pres-

sure switch limit.

Open dispense valve to relieve

pressure.

Problem Cause Solution

Parts

312010B 9

Parts

▲Replacement Danger and Warning labels,

tags, and cards are available at no cost.

11108

Ref. No. Description Qty.

1a PUMP BODY 1

1b PUMP BODY, high flow 1

2 ADAPTER, pump motor 1

3a GEAR, pump 2

3b GEAR, pump, high flow 2

4 SEAL, shaft 1

5 MOTOR, 115 VAC, 3/4 HP 1

7 O-RING, -144 nitrile (Buna N) 1

8 BALL, relief valve 1

9 GUIDE, spring 1

10 SPRING, relief valve 1

11 HOUSING, relief valve 1

12 ADAPTER, bung 1

13 STRAIN RELIEF 1

14 NUT, wire 2

15 RELAY, AC (for models with AC

motors)

17 HOSE, 1/4 in. x 12 in. 1

18 CHECK VALVE, outlet 1

19 CHECK VALVE, inlet 1

20 PRESSURE SWITCH, 370 psi 1

21 SCREW, cap, 5/16-18 x 1 in. 4

22 SCREW, cap, 3/8-16 x 1 in. 4

23▲LABEL, warning (not shown)

Part no. 15G901

Ref. No. Description Qty.

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

01/2007, Revised 01/2007

Kits

Technical Data

Kit Number Description Includes Items

260061 ADAPTER, bung 12

260120 KIT, fluid 1a, 2, 3a, 4, 7, 8, 9, 10, 11, 17, 21, 22

260276 KIT, AC relay 15

260292 KIT, packing 4, 7

260294 KIT, gear 3a, 4, 7

260296 KIT, pressure relief 8, 9, 10, 11

260501 KIT, inlet check valve assembly 19

260502 KIT, outlet check valve assembly 18

260503 KIT, 370 psi pressure switch 20a

260508 KIT, motor, 115 VAC ¾ HP 5a, 6, 13, 14, 15, 23

Maximum Working Pressure 370 psi (2.59 MPa, 25.9 bar)

Output Flow 2.3 gpm (9 lpm)

Inlet Size 3/4 in. npt

Outlet Size -12 JIC male

Horsepower 3/4 hp

Max Current 10.6 amps

Wetted parts carbon steel with zinc plating, stainless steel, galvanized

steel, aluminum, nitrile, rubber, PVC, PVC cement

Table of contents

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