Graco President 241265 Operation manual

308952
Rev. A
First choice when
quality counts. t
INSTRUCTIONS-PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
PresidentRAir Motor
See your pump instruction manual for Maximum Working Pressure.
Model 241265, Series A
For stanchion tube mounting
Model 241265 Shown
8821A
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information 5. . . . . . . . . . . . . . . . . . . . . . . . .
Grounding 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Relief Procedure 6. . . . . . . . . . . . . . . . . . .
Operation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restarting a Stalled Air Motor 7. . . . . . . . . . . . . . . .
Service 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing the Air Motor 8. . . . . . . . . . . . . . . . . . . . . .
Parts 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting Hole Layouts 15. . . . . . . . . . . . . . . . . . . . . . .
Dimensional Drawing 15. . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 16. . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 16. . . . . . . . . . . . . . . . . . . . . . . .
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 1999, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

2 308952
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
WARNING
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.
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
for your equipment. Do not exceed the maximum working pressure of the lowest rated component
in your system.
Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
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 66C (150F) or below –40C (–40F).
Wear hearing protection when operating this equipment.
Do not move or lift pressurized equipment.
Comply with all applicable local, state, and national fire, electrical, and safety regulations.
Never exceed 180 psi (1.2 MPa, 12 bar) air pressure to the motor, and never exceed the stated
maximum working pressure of the pump or the lowest rated component in your system. Refer to
your separate pump instruction manual.
Be sure that all spray/dispensing equipment and accessories are rated to withstand the maximum
air and fluid working pressures of this system. Do not exceed the maximum working pressure of
any component or accessory used in the system.

3308952
WARNING
INJECTION HAZARD
Spray from the gun, 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 is a serious injury. The injury may look like just a cut, but it is a serious
injury. Get immediate medical attention.
Do not point the dispensing valve at anyone or 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.
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.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers.
Keep clear of all moving parts when starting or operating the pump.
Before checking or servicing the equipment, follow the Pressure Relief Procedure on page 6 to
prevent the equipment from starting unexpectedly.

4 308952
WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and re-
sult in a fire or explosion and serious injury.
Ground the equipment and the object being sprayed. Refer to Grounding on page 5.
If there is any static sparking or you feel an electric shock while using this equipment, stop spray-
ing 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 sprayed.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Before operating this equipment, electrically disconnect all equipment in the spray area.
Before operating this equipment, extinguish all open flames or pilot lights in the spray area.
Do not smoke in the spray area.
Do not turn on or off any light switch in the spray area while spraying or while operating if fumes
are present.
Do not operate a gasoline engine in the spray area.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
Be sure that all fluids and solvents used are chemically compatible with the wetted parts shown in
the Technical Data section of your pump manual. Always read the manufacturer’s literature before
using fluid or solvent in your pump.
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.
United States Government safety standards have been adopted under the Occupational Safety and Health Act. You
should consult these standards – particularly the General Standards, Part 1910, and the Construction Standards,
Part 1926.

5308952
Installation
General Information
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and the
parts drawing.
NOTE: Always use Genuine Graco Parts and
Accessories, available from your Graco distributor.
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE OR EXPLOSION HAZ-
ARD on page 4.
 Pump: Use a ground wire and clamp as shown in
Fig. 1. Loosen the grounding lug locknut (A) and
washer (B). Insert one end of a 12 ga (1.5 mm)
minimum ground wire (C) into the slot in lug (D) and
tighten the locknut securely. Connect the other end
of the wire to a true earth ground. Order part
number 103538 Grounding Clamp and 208950
Grounding Wire.
 Air, and fluid hoses: Use only electrically
conductive hoses.
 Air compressor: Follow manufacturer’s
recommendations.
 Spray gun and dispensing valve: Ground through
connection to a properly grounded fluid hose and
pump.
 Object being sprayed: Follow your local code.
 Solvent pails used when flushing: Follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the pail
on a nonconductive surface, such as paper or
cardboard, which interrupts the grounding
continuity.
 To maintain grounding continuity when flushing or
relieving pressure , hold a metal part of the spray
gun firmly to the side of a grounded metal pail, then
trigger the gun.

Fig. 1
C
A
DB

6 308952
Installation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
Fluid under high pressure can be in-
jected through the skin and cause
serious injury. To reduce the risk of an
injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you
Are instructed to relieve the pressure
Stop spraying
Check or service any of the system equipment
Install or clean the spray tips
1. Engage the spray gun/dispensing valve safety
latch.
2. Shut off the air to the motor.
3. Close the bleed-type master air valve (required in
your system).
4. Disengage the gun/valve safety latch.
5. Hold a metal part of the gun/valve firmly to the side
of a grounded metal pail, and trigger the gun/valve
to relieve pressure.
6. Engage the gun/valve safety latch.
7. Open the pump drain valve (required in your
system), having a container ready to catch the
drainage.
8. Leave the drain valve open until you are ready to
spray/dispense again.
If you suspect that the spray tip/nozzle or hose is
completely clogged, or that pressure has not been fully
relieved after following the steps above, very slowly
loosen the tip guard retaining nut or hose end coupling
and relieve pressure gradually, then loosen completely,
then clear the tip/nozzle or hose.
A bleed-type master air valve is required in your
system to reduce the risk of serious bodily injury
from moving parts if you are adjusting or repairing
the air motor.
The bleed-type master air valve relieves air trapped
between this valve and the motor after the air
regulator is shut off. Trapped air can cause the
motor and pump to cycle unexpectedly. Install the
valve between the pump air inlet and the air
regulator within easy reach of the pump.
WARNING
Moving parts can pinch or amputate your fingers or
other body parts. When the pump is operating, the
priming piston (located at the pump intake) and the
air motor piston (located behind the air motor
plates) move. Never Operate the pump with the air
motor plates removed, and keep your fingers and
hands away from the priming piston. See Moving
Parts Hazard on page 3.
WARNING

7308952
Operation
NOTE: See your separate pump manual for detailed
operation instructions.
Restarting a Stalled Air Motor
CAUTION
Never exceed 180 psi (1.2 MPa, 12 bar) air supply
pressure to the air motor. Exceeding this pressure
may cause the air motor to stall with the air transfer
valves stuck at mid position, making the air motor
inoperative.
To reseat the air transfer valves and restart a stalled
air motor, relieve the air supply pressure to the motor
by closing the bleed-type master air valve. If the air
transfer valves fail to reseat, screw the stroke adjuster
(F) out of the cylinder (G), pull up on the trip rod (H)
and screw the cap nut back into the cylinder. See Fig.
2. Be sure the air supply pressure is less than 180 psi
(1.2 MPa, 12 bar) before opening the bleed-type
master air valve.

8 308952
Service
Servicing the Air Motor
Before you Start
Be sure you have all necessary parts on hand. Air
Motor Repair Kit 207385 includes repair parts for
the motor. Pump Repair Kit 239320 includes repair
parts for the pump. Use all the parts in the kits for
the best results. Parts included in the kits are
marked with asterisks (*) or a dagger () in the text
and drawings. See the parts list and drawing for
your pump (pages 12 and 13) for further
information.
Two accessory tools should be used. Padded
pliers, 207579 is used to grip the trip rod without
damaging its surface. Gauge, 171818, is used to
ensure the proper clearance between the poppets
and seat of the transfer valve. See Accessories on
page 14 for ordering.
Disassembly
1. Flush the pump. Follow the Pressure Relief
Procedure Warning, at left, before proceeding.
2. Disconnect the air hose from the motor. If
necessary, disconnect the motor from the pump.
Clamp the air motor base in a vise.
3. Manually push up on the piston rod to move the
piston assembly to the top of its stroke. Unscrew
the stroke adjuster (F) from the cylinder (G). Pull
up on the cap nut. Grip the trip rod (H) with
padded pliers 207579 and screw the stroke
adjuster off the trip rod. See Fig. 2.
CAUTION
Do not damage the plated surface of the trip rod.
Damaging the surface of the trip rod can result in
erratic air motor operation. Use the special padded
pliers, 207579, to grasp the rod.
4. Remove the eight screws (Z) holding the cylinder
(G) to the base (J). Carefully pull the cylinder
straight up off the piston. See Fig. 2.
CAUTION
To avoid damaging the cylinder wall, ALWAYS lift the
cylinder straight up off of the piston. Never tilt the
cylinder as it is being removed.
Always keep fingers clear of the toggle assemblies
(E), to avoid pinching or amputating them. See
Fig. 3.
WARNING
5. Use a screwdriver to push down on the trip rod
yoke (K) and snap the toggle assemblies (E)
down. See Fig. 3. Remove the lockwires (L) from
the adjusting nuts (M and Q) of the transfer valves
(N). Screw the top nuts (M) off. Screw the valve
stems (O) out of the grommets (P) and lower
adjusting nuts (Q). Take the valve poppets (R) off
the stems and squeeze them firmly to check for
cracks.
Fig. 2
G
Z
J
BB
Hold trip rod with padded
pliers207579,toprevent
damage to rod
F
H

9308952
Service
6. Grip the toggle rockers (S) with a pliers. Compress
the springs (T) and swing the toggle assembly (E)
up and away from the piston lugs (U), and remove
the parts. Check that the valve actuator (V) is
supported by the spring clips (W), but slides easily
into them. See Fig. 3.
7. Remove the trip rod yoke (K), valve actuator (V)
and trip rod (H). Check the exhaust valve poppets
(X) for cracks.
NOTE: To remove the exhaust valve poppets (X),
stretch them out and cut with a sharp knife.
8. Pull the piston (Y) up out of the base (J) and
inspect the piston o-ring (AA) and the o-ring in the
base casting.
Cut off tops of
poppets (x) as
indicated by dotted
lines
0.125”
(3.18mm)
CUTAWAY VIEW
Fig. 3
E
Push toggles (E) in
and then up.
Turn wires up.
U
HK L**
M**
O**
P**
Y
J
T
S
WX** V
Q**
R**
H
W
V
X** O**M**
P**
Q**
AA**
Y
R**
N

10 308952
Service
Reassembly
1. Clean all the parts carefully in a compatible solvent
and inspect for wear or damage. Use all the repair
kit parts during reassembly and replace other parts
as necessary.
2. Check the polished surfaces of the piston, piston
rod and cylinder wall for scratches or wear. A
scored rod will cause premature packing wear and
leaking.
3. Lubricate all parts with a light, waterproof grease.
4. Be sure the o-rings are in place. Slide the piston
rod down through the throat bearing and lower the
piston (Y) into the air motor base (J).
5. Pull the exhaust valve poppets (X**) into the valve
actuator (V) and clip off the top part shown with
dotted lines. See Fig. 3.
6. Install the transfer valve poppets (R**) onto the
valve stems (O**), then reassemble the valve
stems (O**), bottom adjusting nuts (Q**),
grommets (P**), and top adjusting nuts (M**) on
the piston (Y). Assemble the trip rod (H), valve
actuator (V), trip rod yoke (K) and toggle
assemblies (E) on the piston. See Fig. 3.
7. Before installing the lockwires (L**) in the adjusting
nuts (M** and Q**), use the special gauge 171818
to adjust the transfer valve (N) so there is 0.145 in.
(3.68 mm) clearance between the poppets (R**)
and the piston (Y) when the toggle assemblies are
in the down position. See Fig. 3.
8. Snap the toggle assemblies (E) to the up position.
Reinstall the cylinder (G) and stroke adjuster (F).
Reassemble the air motor to the displacement
pump.
9. Before remounting the pump, connect an air hose
and run the pump slowly, at about 40 psi
(0.28 MPa, 2.8 bar) to ensure that it operates
smoothly.
10. Reconnect the ground wire before regular
operation of the pump.