Graco 237526, B Series User Manual
Instructions – Parts List
3:1 Fire–Ballr425 Pump
308485N
For pumping non–corrosive and non–abrasive oils and lubricants.
Model 237526, Series B
540 psi (3.7 MPa, 37 bar) Maximum Working Pressure
180 psi (1.2 MPa, 12 bar) Maximum Air Input Pressure
Important Safety instructions
Read all warnings and instructions in this manual.
Save these instructions.
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Guide 9. . . . . . . . . . . . . . . . . . . . . . . . . .
Air Motor and Throat Service 10. . . . . . . . . . . . . . . . . . . .
Displacement Pump Service 13. . . . . . . . . . . . . . . . . . . .
Air Motor Parts Drawing 14. . . . . . . . . . . . . . . . . . . . . . . .
Air Motor Parts List 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement Pump Parts Drawing and List 16. . . . . . .
Dimensions 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Data 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 1995, Graco Inc. is registered to I.S. EN ISO 9001
TI1066
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
WARNINGWARNING
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.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
Check equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure stated on the equipment or in the Technical Data
section of the instruction manual for your equipment. Do not exceed the maximum working
pressure of the lowest rated component in your system.
Use fluids and solvents that are compatible with the equipment wetted parts. Refer to the
Technical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s
warnings.
Do not use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents,
or fluids containing such solvents in pressurized aluminum equipment. Such use could result in a
chemical reaction, with the possibility of explosion.
Handle hoses carefully. Do not pull on hoses to move 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).
Do not lift pressurized equipment.
Comply with all applicable local, state, and national fire, electrical, and safety regulations.
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WARNINGWARNING
SKIN INJECTION HAZARD
Fluid from the dispensing valve, leaks, or ruptured components can inject fluid into your body and
cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on
the skin can also cause serious injury.
Fluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
Do not point the dispensing valve at anyone or at any part of the body.
Do not put your hand or fingers over the end of the dispensing valve.
Do not stop or deflect leaks with your hand, body, glove, or rag.
Use only extensions and no-drip tips that are designed for use with your dispensing valve.
Do not use a low-pressure flexible nozzle with this equipment.
Follow the Pressure Relief Procedure on page 8 if the dispensing valve clogs and before
cleaning, checking, or servicing the equipment.
Tighten all fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do
not repair high pressure couplings; you must replace the entire hose.
Fluid hoses must have spring guards on both ends to help protect them from rupture caused by
kinks or bends near the couplings.
HAZARDOUS FLUIDS
Improper handling of hazardous fluids or inhaling toxic fumes can cause extremely serious injury or
death from splashing in the eyes, ingestion, or bodily contamination.
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.
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3
WARNINGWARNING
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 lubricated. Refer to Grounding on page 7.
If there is any static sparking or you feel an electric shock while using this equipment, stop
dispensing 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 dispensed.
Keep the dispensing area free of debris, including solvent, rags, and gasoline.
Before operating this equipment, electrically disconnect all equipment in the dispensing area.
Before operating this equipment, extinguish all open flames or pilot lights in the dispensing area.
Do not smoke in the dispensing area.
Do not turn on or off any light switch in the dispensing area while dispensing or while there are
any fumes in the air.
Do not operate a gasoline engine in the dispensing area.
MOVING PARTS HAZARD
Moving parts, such as the air motor piston, can pinch or amputate your fingers.
Keep clear of all moving parts when starting or operating the pump.
Before servicing the equipment, follow the Pressure Relief Procedure on page 8 to prevent the
equipment from starting unexpectedly.
4 308485
Installation
The typical installation shown in Fig. 1 is only a guide for selecting and installing a pump; it is not an actual system
design. Contact your Graco representative for assistance in designing a system to suit your needs.
G
A
C
A
DN
E
P
J
R
B
Y
H
DETAIL A
K
S
L
M
Fig. 1
For portable applications
KEY
A Bleed-type master air valve (required)
B Air line filter
C Air regulator and gauge
D Pump runaway valve (shown for
position) not needed if you use
a low-level cut-off valve
E Air Inlet
G Pump (Model 237526 shown)
H Fluid drain valve (required)
06025
J Dispensing valve (Model 222411 shown)
K Thermal relief kit (required) 237601
L Male quick-disconnect fitting
M Female quick-disconnect coupler
N Air line lubricator
P Fluid hose
S Fluid inlet, 1 1/2” npt
R Electrically conductive air hose (218093 shown)
Y Ground wire (required)
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5
Installation
System Accessories
CAUTION
Do not hang the air accessories directly on the air
inlet (E). The fittings are not strong enough to
support the accessories and may cause one or
more to break. Provide a bracket on which to
mount the accessories.
WARNING
Three accessories are required in your system: an
air bleed device, a fluid drain valve, and a thermal
relief kit. These accessories help reduce the risk
of serious bodily injury including fluid injection,
splashing in the eyes or on the skin, and injury
from moving parts if you are adjusting or repairing
the pump.
The air bleed device relieves air trapped between it
and the air motor after the air supply is shut off.
Trapped air can cause the air motor to cycle unexpectedly, causing serious bodily injury if you are
adjusting or repairing the pump. Use either a
bleed-type master air valve (A) or a quick disconnect coupler (M) and fitting (L). Install it near the
pump air inlet, within easy reach of the pump.
Install the following accessories in the order shown in
Fig.1:
Install an air line lubricator (N) for automatic air
motor lubrication.
Install a bleed-type master air valve (A) to relieve
air trapped between it and the motor when the
valve is closed. As an alternative, you can install
an air line quick disconnect coupler (M) and fitting
(L) to serve as an air-bleed device. See Detail A in
Fig.1. To order a 1/2” npt, 300 psi (2.1 MPa,
21 bar) Maximum Working Pressure bleed-type
master air valve, order Part No. 107142.
Install the air regulator (C) to control pump speed
and pressure.
Install an air line filter (B) to remove harmful dirt
and contaminants from your compressed air supply.
Install another bleed-type master air valve (A) to
isolate the accessories for servicing.
Install a fluid drain valve (H) near the pump fluid
outlet to relieve fluid pressure in the hose and gun
when the valve is opened. To order a 3/8” npt
(mbe) fluid drain valve, order Part No. 210658.
The fluid drain valve (H) assists in relieving fluid
pressure in the displacement pump, hoses and
dispensing valve. Triggering the valve to relieve
pressure may not be sufficient.
The thermal relief kit (K) relieves pressure in the
fluid line caused by heat expansion.
Install a suitable fluid hose (P) and dispensing valve
(J).
Install a thermal relief kit (K) to relieve pressure in
the fluid line caused by heat expansion. To order a
600 psi (4.1 MPa, 41 bar) minimum relief pressure,
630 psi (4.4 MPa, 44 bar) maximum relief pressure
thermal relief kit, order Part No. 237601.
6 308485
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