Graco Marine Sanitation System 237526 User Manual

Instructions – Parts List  
3:1 Fire–Ballr 425 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  
TI1066  
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441  
Copyright 1995, Graco Inc. is registered to I.S. EN ISO 9001  
 
WARNING  
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.  
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surgical treatment.  
D Do not point the dispensing valve at anyone or at any part of the body.  
D Do not put your hand or fingers over the end of the dispensing valve.  
D Do not stop or deflect leaks with your hand, body, glove, or rag.  
D Use only extensions and no-drip tips that are designed for use with your dispensing valve.  
D Do not use a low-pressure flexible nozzle with this equipment.  
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cleaning, checking, or servicing the equipment.  
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not repair high pressure couplings; you must replace the entire hose.  
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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.  
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state, and national guidelines.  
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and solvent manufacturer.  
3
308485  
 
WARNING  
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.  
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.
D 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.  
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being dispensed.  
D Keep the dispensing area free of debris, including solvent, rags, and gasoline.  
D Before operating this equipment, electrically disconnect all equipment in the dispensing area.  
D Before operating this equipment, extinguish all open flames or pilot lights in the dispensing area.  
D Do not smoke in the dispensing area.  
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any fumes in the air.  
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MOVING PARTS HAZARD  
Moving parts, such as the air motor piston, can pinch or amputate your fingers.  
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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
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K H  
DETAIL A  
M
S
L
For portable applications  
06025  
KEY  
A
B
C
D
Bleed-type master air valve (required)  
Air line filter  
J
K
L
M
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Y
Dispensing valve (Model 222411 shown)  
Thermal relief kit (required) 237601  
Male quick-disconnect fitting  
Female quick-disconnect coupler  
Air line lubricator  
Fluid hose  
Fluid inlet, 1 1/2” npt  
Electrically conductive air hose (218093 shown)  
Ground wire (required)  
Air regulator and gauge  
Pump runaway valve (shown for  
position) not needed if you use  
a low-level cut-off valve  
Air Inlet  
E
G
H
Pump (Model 237526 shown)  
Fluid drain valve (required)  
Fig. 1  
5
308485  
 
Installation  
Install the following accessories in the order shown in  
System Accessories  
Fig.1:  
CAUTION  
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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.  
motor lubrication.  
D 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.  
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.  
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and pressure.  
D 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.  
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 unex-  
pectedly, causing serious bodily injury if you are  
adjusting or repairing the pump. Use either a  
bleed-type master air valve (A) or a quick discon-  
nect coupler (M) and fitting (L). Install it near the  
pump air inlet, within easy reach of the pump.  
D 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.  
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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.  
(J).  
D 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.  
The thermal relief kit (K) relieves pressure in the  
fluid line caused by heat expansion.  
6
308485  
 
Installation  
To ground the pump, remove the ground screw (Z)  
Grounding  
and insert through the eye of the ring terminal at end of  
the ground wire (Y). Fasten the ground screw back onto  
the pump and tighten securely. Connect the other end of  
the ground wire to a true earth ground. See Fig. 2. To  
order a ground wire and clamp, order Part No. 222011.  
Proper grounding is an essential part of maintaining a  
safe system.  
To reduce the risk of static sparking, ground the pump.  
Check your local electrical code for detailed grounding  
instructions for your area and type of equipment. Be  
sure to ground all of the following equipment:  
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the right.  
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conductive hoses.  
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recommendations.  
Y
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Z
D To maintain grounding continuity when flushing or  
relieving pressure, always hold a metal part of the  
valve firmly to the side of a grounded metal pail,  
then trigger the valve.  
TI1052  
Fig. 2  
7
308485  
 
Operation  
1. With the air regulator (C) closed, open the bleed-  
Pressure Relief Procedure  
type master air valves (A), or, if so equipped, join  
the quick disconnect coupler (M) to the male fitting  
(L).  
WARNING  
SKIN INJECTION HAZARD  
To reduce the risk of serious bodily  
injury, including fluid injection or splash-  
ing in the eyes or on the skin, always  
2. Open the dispensing valve (J) into a grounded  
metal waste container, making firm metal-to-metal  
contact between the container and valve.  
follow this procedure whenever you shut off the  
pump, when checking or servicing any part of the  
system, when installing or changing dispensing  
devices, and whenever you stop dispensing.  
3. Open the pump air regulator (C) slowly, just until  
the pump is running. When the pump is primed  
and all air has been pushed out of the lines, close  
the dispensing valve.  
1. Close the pump air regulator and the bleed-type  
master air valve (required in your system).  
2. Hold a metal part of the dispensing valve firmly to  
a grounded metal waste container and trigger the  
valve to relieve the fluid pressure, or open the  
drain valve (H).  
NOTE: When the pump is primed, and with sufficient  
air supplied, the pump starts when the dis-  
pensing valve is opened and shuts off when it  
is closed.  
Startup and Adjustment  
4. Adjust the air regulator until you get sufficient flow  
from the dispensing valve. Always run the pump  
at the lowest speed necessary to get the desired  
results. Do not exceed the maximum working  
pressure of any component in the system.  
WARNING  
COMPONENT RUPTURE HAZARD  
The maximum working pressure of each  
component in the system may not be the  
same. To reduce the risk of overpres-  
surizing any component in the system, be sure you  
know the maximum working pressure of each  
component. Never exceed the maximum working  
pressure of the lowest rated component in the  
system. Overpressurizing any component can  
result in rupture, fire, explosion, property damage,  
and serious injury.  
NOTES:  
D Never allow the pump to run dry of the fluid being  
pumped. A dry pump will quickly accelerate to a  
high speed, possibly damaging itself. If your pump  
accelerates quickly, or is running too fast, stop it  
immediately and check the fluid supply. If the  
supply container is empty and air has been pumped  
into the lines, prime the pump and lines with fluid,  
or flush it and leave it filled with a compatible sol-  
vent. Be sure to eliminate all air from the fluid lines.  
To determine the fluid output pressure using the air  
regulator reading, multiply the ratio of the pump by  
the air pressure shown on the regulator gauge. For  
example:  
3 (:1) ratio x 180 psi air =  
540 psi fluid output  
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component in your system.  
[3 (:1) ratio x 1.2 MPa air = 3.6 MPa fluid output]  
[3 (:1) ratio x 12 bar air = 36 bar fluid output]  
D If the pump will be unattended for any period of  
time, or to shut off the system at the end of the  
work shift, always follow the Pressure Relief  
Procedure at left.  
Limit the air to the pump so that no air line or fluid  
line component or accessory is overpressurized.  
8
308485  
 
Troubleshooting  
NOTE: Check all other possible problems and  
WARNING  
INJECTION HAZARD  
solutions before disassembling the pump.  
To reduce the risk of serious bodily  
injury, including fluid injection or splash-  
ing in the eyes or on the skin, always  
follow the Pressure Relief Procedure on page 8  
whenever you shut off the pump, when checking or  
servicing any part of the system, when installing or  
changing dispensing devices, and whenever you  
stop dispensing.  
Problem  
Cause  
Solution  
Pump fails to operate  
Inadequate air supply pressure or  
restricted air lines  
Increase air supply; clear  
Closed or clogged dispensing  
valve  
Open; clean  
Clogged fluid lines, hoses, valves,  
etc.  
Clear*  
Damaged air motor  
Service air motor  
Exhausted fluid supply  
Refill and reprime or flush  
Service air motor  
Continuous air exhaust  
Erratic pump operation  
Worn or damaged air motor gas-  
ket, packing, seal, etc.  
Exhausted fluid supply  
Refill and reprime or flush  
Clear; service  
Held open or worn intake valve or  
piston packings  
Pump operates, but output low on  
up stroke  
Held open piston valve or worn  
piston packings  
Clear; service  
Pump operates, but output low on  
down stroke  
Held open or worn intake valve  
Clear; service  
Pump operates, but output low on  
both strokes  
Inadequate air supply pressure or  
restricted air lines  
Increase air supply; clear  
Open; clean  
Closed or clogged valves  
* Follow the Pressure Relief Procedure on page 8, and disconnect the fluid line. If the pump starts when  
the air is turned on again, the line, hose, valve, etc., is clogged.  
9
308485  
 
Air Motor and Throat Service  
8. Remove the six screws (3) holding the cylinder  
Before You Start  
(30) to the base (28). Carefully pull the cylinder  
D Be sure you have all necessary parts on hand.  
Air Motor Repair Kit 207385 includes repair parts  
for the motor. Use all the parts in the kit for the  
best results. Parts included in the kit are marked  
with one asterisk, for example (19*), in the text and  
drawings. See the Parts List on page15.  
straight up off of the piston (53).  
CAUTION  
To avoid damaging the cylinder wall, lift the cylinder  
straight up off of the piston. Never tilt the cylinder  
as it is being removed.  
D Two accessory tools should be used: Padded  
Pliers, 207579, are used to grip the trip rod without  
damaging its surface, and a 0.125-in. (3.18 mm)  
Gauge, 171818, is used to assure the proper  
clearance between the poppets and seat of the  
piston.  
9. Remove the piston/base from the vise, and set it  
upright on the workbench.  
24  
Disassembly  
30  
1. Flush the pump. Follow the Pressure Relief  
Procedure on page 8 before proceeding.  
2. Disconnect the hoses, remove the pump from its  
mounting, and clamp the air motor base (28) in a  
vise horizontally by closing the vice jaws on the  
flange.  
31  
19*  
53  
3. Use a strap wrench on the displacement pump  
cylinder (110) to screw it out of the air motor base  
(28). See Fig. 3.  
20*  
4. Remove the air motor base from the vice, and  
place the piston rod (29) flats in the vice with the  
air motor up.  
3
29  
28  
5. Loosen the lift ring (24). Pull the lift ring up, grip  
the trip rod (31) with the padded pliers, and screw  
the lift ring off of the rod.  
10{  
103  
113  
107  
{
6. Remove the piston/valve seat (109) from the rod  
(29) with wrenches or with the vice and a wrench.  
flange  
109  
7. Remove the piston ball (103), u-cup packing  
(107{ ), and piston washer (113).  
110  
TI1067  
CAUTION  
Do not damage the plated surface of the trip rod  
(31). Damaging the surface of the trip rod can  
result in erratic air motor operation. Use the  
special padded pliers, 207579, to grasp the rod.  
Fig. 3  
{
Included in Repair Kit 237602.  
10  
308485  
 
Air Motor and Throat Service  
10. Pull the piston assembly from the air motor base  
14. In this step, while you are prying with the screw-  
driver with one hand, cover the toggle assemblies  
with your other hand so as to catch the spring-  
loaded toggle assemblies when they snap out of  
the lugs. Place the tip of a screwdriver into the  
piston between the piston lugs (L) below the pivot  
pins (16) on the toggles, pry up with the screw-  
driver handle to compress the springs on the  
toggle assembly (M) up and away from the piston  
lugs, and remove the parts. See Fig. 4.  
(28), and set it aside.  
11. Remove the vee block seal (10{ ) with a pick, and  
clean the groove in the air motor base (28).  
Remove any dirt in the groove, and wipe the  
groove clean with a cloth.  
12. Inspect the air motor for damaged or worn inlet  
valve grommets (17*), o-ring packings (19*, 20*),  
valve nuts (21*), lock wires (22*), exhaust valve  
poppets (26*), or inlet valve poppets (32*). If any  
of these parts need to be replaced, continue with  
steps 13 to 19. Otherwise, see Reassembly on  
page 12.  
15. Straighten the lockwires (22*) and remove them  
from the valve nuts (21*). Screw the top nuts off.  
Remove the trip rod yoke (13), actuator (12), and  
trip rod (31). Unscrew the bottom nuts (21*), and  
remove the poppets. Make sure the valve bar  
spring clips (14) are not worn or damaged and that  
they properly guide the actuator (12).  
13. Use a screwdriver to push down on the trip rod  
yoke (13), and snap the toggles down. See Fig. 4.  
16. Remove the exhaust valve poppets (26) by cutting  
them with a side cutter, then pull them out of the  
actuator (12).  
17. Clean all the parts carefully in a compatible solvent  
and inspect them for wear or damage. Use all the  
repair kit parts during reassembly, and replace  
other parts as necessary.  
WARNING  
MOVING PARTS HAZARD  
To reduce the risk of pinching or  
amputating your fingers, keep your  
fingers clear of the toggle assemblies  
when you are snapping the toggles (M in  
Fig. 4 ) up or down.  
18. Check the surfaces of the piston, piston rod, and  
cylinder wall for scratches or wear. A scored rod  
will cause premature packing wear and leaking.  
19. Lubricate all parts with a light, waterproof grease.  
11  
308485  
 
Air Motor and Throat Service  
13  
31  
Cut off tops  
of poppets as  
indicated by  
dotted lines.  
15  
23  
25  
16  
15  
22*  
M
31  
21*  
32*  
17*  
13  
26*  
14  
32*  
21*  
12  
Turn  
lock-  
wire  
s
L
17*  
21*  
19*  
32*  
up.  
0.125”  
(3.18 mm)  
27  
28  
32*  
27  
04422  
04423  
14  
26* 21*  
Cutaway View  
Fig. 4  
Reassembly  
1. Place the piston rod (29) flats in the vice with the  
air motor up.  
7. Measuring with the gauge (Part No.171818),  
create 0.125 in. (3.18 mm) of clearance between  
the inlet valve poppets (32*) and the piston seat  
when the inlet valve is open. See the Cutaway  
View Fig. 4.  
2. Pull the exhaust valve poppets (26*) into the valve  
actuator (12), and clip off the top parts of the  
poppets (shown with dotted lines in the Cutaway  
View in Fig. 4).  
NOTE: Adjust the distance between the inlet valve  
poppets and the piston seat by turning the  
top valve nuts (21*).  
3. Install the grommets (17*) in the actuator (12),  
place the inlet valve poppets (32*) in the piston,  
and thread the bottom valve nuts (21*) onto the  
8. Tighten the bottom valve nuts (21*) securely by  
hand.  
inlet valve poppets until there are a few threads left  
before the threads run out.  
9. Align the holes in the valve nuts (21*) and the slots  
on the tops of the inlet valve poppets (32*), and  
drop the lock wires (22*) through the holes in the  
valve nuts and into the slots in the inlet valve  
poppets. Pull the lock wires down tightly, and  
bend the ends with pliers so that they cannot be  
pulled back out of the holes.  
NOTE: If you thread the valve nuts too far down  
onto the poppets, they will run off of the  
threaded part of the poppets.  
4. Grease heavily and place the trip rod (31) in the  
piston, place the actuator (12) in the yoke (13),  
and place the well-greased actuator/yoke assem-  
bly in the piston, with the trip rod going through the  
center holes of the actuator and yoke and the inlet  
valve poppets (32*) going through the grommets  
(17*).  
CAUTION  
Never re-use the old lock wires. They get brittle  
and will break easily from too much bending.  
5. Thread the top valve nuts (21*) onto the inlet valve  
poppets (32*) until one thread of the inlet valve  
poppets is exposed above the valve nuts.  
10. Grease and install the new o-rings (19* and 20*)  
on the piston assembly (27) and in the groove in  
the air motor base (28).  
6. Install the toggle pins (15) in the yoke (13), place  
the toggle arm (23) ends of the toggle assembly  
(M) onto the toggle pins, and snap the pivot pin  
(16) ends of the toggle assembly into the lugs (L).  
11. Grease and reinstall the vee block seal (10{ ) in  
the groove in the air motor base (28).  
12  
308485  
 
Air Motor and Throat Service  
12. Slide the piston rod (29) down through the pack-  
17. Clamp the flats of the piston/valve seat (109) in a  
vice, and, using a crow’s-foot wrench, torque the  
piston rod (29) to the piston valve seat to 40 to 60  
ft-lb.  
ing, and lower the piston (27) into the air motor  
base (28).  
13. Clamp the air motor base (28) in a vise horizontally  
by closing the vice jaws on the flange.  
18. Clamp the air motor base (28) in a vise horizontally  
by closing the vice jaws on the flange  
14. Install the u-cup packing (107{ ) with the lips up,  
and place the piston washer (113) on the piston/  
valve seat (109).  
19. Use a strap wrench to screw the displacement  
pump cylinder (110) to the air motor base (28), and  
torque with a crow’s-foot wrench to 95 to 105 ft-lb.  
NOTE: Make sure the lips of the u-cup packing  
(107{ ) face up. See Fig. 3.  
20. Before remounting the pump, connect an air hose  
and run the air motor slowly, at about 40 psi (0.28  
MPa, 2.8 bar) to see that it operates smoothly.  
15. Place the piston ball (103) in the piston rod (29).  
16. Apply Loctiter to the threads of the piston/valve  
seat (109), and thread the assembly from Step 14  
onto the piston rod (29).  
21. Reconnect the ground wire before regular opera-  
tion of the pump.  
Displacement Pump Service  
1. Follow the Pressure Relief Procedure on  
page 8.  
Disassembly  
NOTE: Displacement Pump Repair Kit 237602  
includes repair parts for the pump throat and  
piston. Use all the parts in the kit for the best  
results. Parts included in the kit are marked  
with a dagger, for example (7{ ), in the text and  
drawings. See the Parts List on page 16.  
2. Follow steps 1 through 6 of Disassembly on page  
10.  
3. Carefully inspect the smooth, inner surface of the  
cylinder (110) for scoring or irregular surfaces.  
Such damage causes premature seal wear and  
leaking. Replace the cylinder as needed.  
1. Flush the pump. Follow the Pressure Relief  
Procedure on page 8, before proceeding.  
Reassembly  
2. Disconnect the hoses, remove the pump from its  
mounting, and clamp the air motor base (28) in a  
vise horizontally by closing the vice jaws on the  
flange.  
Do steps 14 through 21 in Air Motor and Throat  
Service on this page.  
Intake Valve See Fig 5.  
1. Follow the Pressure Relief Procedure on  
page 8.  
103  
108{  
2. Unscrew the valve housing (111). Remove the  
113  
110  
o-ring (105{), retainer (112), and ball (104).  
109  
107  
{
1
3. Inspect the parts for wear or damage. If the ball is  
nicked, replace it. Reassemble, using grease on  
the male threads.  
112  
104  
Displacement Pump See Fig 5.  
105{  
1
Lips face up  
NOTE: Clean and inspect all parts for wear or damage  
as you disassemble them. Replace parts as  
needed. For best results, always replace all  
the o-rings and packings when you disassem-  
ble the pump.  
111  
03847  
Fig. 5  
{
Included in Repair Kit 237602.  
13  
308485  
 
Air Motor Parts Drawing  
24  
11  
113  
107  
30  
3
{
103  
20*  
18  
1
109  
13  
108{  
15  
3
22*  
23  
25  
21*  
2
110  
105  
31  
12  
16  
26*  
17*  
21*  
27a  
27b  
{
27  
28  
112  
104  
4
7
10{  
27c  
5
*19  
111  
29  
32*  
06027  
1
2
3
4
Torque to 40 to 60 ft-lb  
Torque to 95 to 105 ft-lb  
Lips face up  
Lips face down  
14  
308485  
 
Air Motor Parts List  
Ref.  
Ref.  
No. Part No.  
Description  
Qty.  
No. Part No.  
Description  
Qty.  
3
5
7
101578  
102656  
116343  
SCREW, cap, hex hd  
MUFFLER, air exhaust  
SCREW, grounding  
SEAL, pump  
8
1
1
1
1
2
1
2
2
2
1
1
1
4
2
2
1
25 167585  
26* 170709  
27 207391  
SPRING, helical compression  
POPPET, exhaust valve  
2
2
PISTON, includes items 27a to 27c  
10{ 112130  
11 156698  
12 158359  
13 158360  
15 158362  
16 158364  
17* 158367  
18 158377  
19* 158378  
20* 158379  
21* 160261  
22* 160618  
23 160623  
24 190929  
(also includes 207385 repair kit when  
ordered as a replacement part)  
PACKING, o-ring  
ACTUATOR, valve, air  
YOKE, rod, trip  
PIN, toggle  
1
27a 102975  
27b 158361  
27c  
28 190229  
29 190233  
30 15E954  
31 207150  
32* 236079  
33 119344  
35Y 290259  
SCREW, rd hd mach; 6–32 x 1/4” 2  
CLIP, Spring  
2
BARE PISTON (not sold separately) 1  
PIN, pivot  
BASE, motor, air  
ROD, piston  
1
1
1
1
2
1
1
GROMMET, inlet valve  
PACKING, ring, seal  
PACKING, o-ring  
PACKING, o-ring  
NUT, valve  
CYLINDER, motor, air  
ROD, trip  
POPPET, inlet valve  
LABEL, designation  
LABEL, warning  
WIRE, lock  
ARM, toggle  
LIFT RING  
*
Included in Air Motor Repair Kit 207385,  
which may be purchased separately.  
{
I
n
c
l
u
d
e
d
i
n
P
u
m
p
R
e
p
a
i
r
K
i
t
2
3
7
6
0
2
,
which may be purchased separately.  
Y
E
x
t
r
a
w
a
r
n
i
n
g
l
a
b
e
l
s
a
r
e
a
v
a
i
l
a
b
l
e
a
t
n
o
c
o
s
t
.
15  
308485  
 
Displacement Pump Parts Drawing and List  
Model 237526, Series B  
Ref  
Ref  
No. Part No. Description  
Qty.  
No. Part No. Description  
Qty.  
109 189707  
110 189708  
111 189709  
112 189710  
113 189711  
PISTON/SEAT, valve  
1
1
1
1
1
10  
{
112130  
SEAL, block, vee  
shown on page 14  
AIR MOTOR  
See parts on page 14  
BALL, piston; metallic  
BALL; sst  
PACKING, o-ring  
PACKING, u-cup  
PACKING, o-ring  
CYLINDER, pump  
1
VALVE HOUSING, 1 1/2” npt(f)  
RETAINER, ball  
WASHER, piston  
101  
1
1
1
1
1
1
103 101178  
104 108001  
105{ 110828  
107{ 112565  
108{ 166071  
{
T
h
e
s
e
p
a
r
t
s
a
r
e
i
n
c
l
u
d
e
d
i
n
P
u
m
p
R
e
p
a
i
r
K
i
t
237602, which may be purchased separately.  
113  
1
107{  
103  
109  
108  
101  
{
110  
105{  
112  
104  
111  
1
Lips face up  
T11069  
16  
308485  
 
Dimensions  
MODEL 237526 Series B  
3/4-in. npt(f)  
fluid outlet  
1/2-in. npt(f)  
air inlet  
3/4-in. npt(f)  
muffler port  
grounding  
screw  
29.4 in.  
(747 mm)  
11.0 in.  
(279 mm)  
Note: For sealed  
tank mounting, use  
gasket 192658.  
06024  
1 1/2-in. npt(f)  
fluid intake  
17  
308485  
 
Mounting Hole Layout  
4.12 in. (104.6 mm) diam-  
eter clearance hole  
45_  
Four 0.406-in.  
(10.3 mm) holes  
on 7-in. (177.8  
mm) bolt circle  
8.0 in.  
(203.2 mm)  
diameter of  
flange  
Technical Data  
Maximum working pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 540 psi (3.7 MPa, 37 bar)  
Fluid pressure ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3:1  
Air operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 180 psi (0.28 to 1.2 MPa, 2.8 to 12 bar)  
3
Air consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ft /min per gallon pumped,  
3
(0.022 m /min per liter pumped)  
3
3
up to 8 ft /min (0.058 m /min) with pump  
operating within recommended range  
Pump cycles per gallon (per liter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 (1.6)  
Maximum recommended pump speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 cycles/min;  
12 gpm (45 lpm)  
Recommended speed for optimum pump life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 to 25 cycles per min  
Piston seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . polyurethane  
Rod seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . nitrile  
Wetted parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . aluminum, steel, nitrile  
Approximate weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 lb (21 kg)  
* Sound pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 dB(A)  
* Sound pressure reading taken with pump operating at 60 cycles per minute at  
100 psi (0.7 MPa, 7 bar). Sound pressure measured per CAGI-PNEUROP,  
1971.  
18  
308485  
 
Performance Chart  
Differential Air Motor  
Outlet Pressure vs. Outlet Flow  
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
A 40 psi (2.8 bar) air pressure  
B 70 psi (4.8 bar) air pressure  
C 100 psi (6.9 bar) air pressure  
D 150 psi (10.4 bar) air pressure  
D
C
B
A
0
0
2
4
6
8
10  
12  
Outlet Flow (GPM)  
Inlet Air Consumption (CFM)  
70  
E 40 psi (2.8 bar) air pressure  
F 70 psi (4.8 bar) air pressure  
G 100 psi (6.9 bar) air pressure  
H 150 psi (10.4 bar) air pressure  
60  
50  
40  
30  
20  
10  
0
H
G
F
E
0
2
4
6
8
10  
12  
Outlet Flow (GPM)  
19  
308485  
 
Graco Standard Warranty  
Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the  
date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco,  
Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be  
defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written  
recommendations.  
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by  
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or sub-  
stitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of  
Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,  
installation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco.  
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for  
verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The  
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect  
in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and  
transportation.  
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT  
NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.  
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other  
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any  
other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the  
date of sale.  
Graco makes no warranty, and disclaims all implied warranties of merchantability and fitness for a particular purpose in connection  
with accessories, equipment, materials or components sold but not manufactured by Graco. These items sold, but not manufactured  
by Graco (such as electric motors, switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide  
purchaser with reasonable assistance in making any claim for breach of these warranties.  
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment  
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract,  
breach of warranty, the negligence of Graco, or otherwise.  
FOR GRACO CANADA CUSTOMERS  
The parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings  
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnais-  
sent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires  
exécutés, donnés ou intentés à la suite de ou en rapport, directement ou indirectement, avec les procedures concernées.  
Graco Phone Numbers  
TO PLACE AN ORDER, contact your Graco distributor, or call one of the following numbers  
to identify the distributor closest to you:  
1–800–533–9655 Toll Free  
612–623–6928  
612–378–3590 Fax  
All written and visual data contained in this document reflects the latest product information available at the time of publication.  
Graco reserves the right to make changes at any time without notice.  
This manual contains English. MM 308485  
Graco Headquarters: Minneapolis  
International Offices: Belgium, Korea, China, Japan  
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441  
308485 01/1995, Revised 3/2007  
20  
308485  
 

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