Graco 260550 Operation manual

Copyright 2007
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
1
18
22
21
5
9
19
6
17
12
7
3
4
13
14
15
20
2
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)
1
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
1
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