Graco 3M Operation manual

II 2 G
Instructions - Parts List
3
Paint Preparation System
Spray Guns
Table of Contents
Symbols 2
Warnings 2
Selection Charts 2
Typical Installation 3
Setup 3
Operation 6
Daily Gun Care, Flushing and Cleaning 7
Troubleshooting 8
Service 10
Parts 14
Accessories 15
Dimensions 15
Technical Data 15
Warranty 16
Contact information 16
Read warnings and instructions
3M-Graco spray gun systems are intended for use only by trained and
professional tradesmen, and used solely for the purpose of spray
application of liquid coating materials. They must be used only in
areas which are compatible with the material being sprayed, in strict
compliance with applicable local and national regulations.
HVLP, Compliant, and Airspray
0.7 MPa, 7 bar (100 psi) Maximum Working Air Pressure
200 kPa, 2.0 bar (29 psi) Maximum Compliant Inbound Air Pressure
(HVLP and Compliant)
U.S Patent Pending
Manufactured by
®
GB

Spray Gun Assemblies Selection Charts
Symbols
Gun and PPS Cup Orifice Size Pattern Length†Air Cap Housing
Assembly. Part No. mm (in.) mm (in.) Marking Colour
HVLP Guns - 50261 1.3 (.051) 330 (13) H Purple
for high efficiency 50262 1.4 (.055) 330 (13) H Purple
with low pressure 50263 1.5 (.059) 330 (13) H Purple
Air Spray Guns 50255 1.5 (.059) 228 (9) A Black
50256 1.8 (.070) 228 (9) A Black
Compliant Guns 50257 1.3 (.051) 279 (11) C Gold
50258 1.4 (.055) 279 (11) C Gold
50259 1.5 (.059) 279 (11) C Gold
† Measured with gun nozzle 203mm (8in.)
from target surface
Selecting the Proper Nozzle Size
Follow your material suppliers recommendations for proper nozzle size. In general, use the smaller nozzle sizes for low flow rates or
light viscosity materials and larger nozzle sizes for higher flows and higher viscosity materials.
This symbol alerts you to the possibility of damage to or
destruction of equipment if you do not follow the instructions.
This symbol alerts you to the possibility of serious injury or
death if you do not follow the instructions.
Warning Symbol Caution Symbol
CAUTION
WARNING
WARNING
2
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• 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 Technical Data
in all equipment manuals. Read fluid and solvent manufacturers’ warnings. • Check equipment daily. Repair or replace worn or
damaged parts immediately. • Do not alter or modify equipment. • Route hoses and cables away from traffic areas, sharp edges,
moving parts, and hot surfaces. • Do not use hoses to pull equipment. • Comply with all applicable safety regulations.
• This equipment is to be used only by professional tradesmen who are familiar with its possible hazards. • Read all instruction
manuals, tags, and labels before operating the equipment. • Use the equipment only for its intended purpose. See intended use
statement on front cover.
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief Procedure on page 6 whenever you are instructed to
relieve pressure.
• Do not stop or deflect fluid leaks with your hand, body, glove or rag.
• Do not point the spray gun at anyone or at any part of the body.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work areas can ignite or explode.
To help prevent fire and explosion:
• Use equipment only in well ventilated area. • Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric
lamps, and plastic drop cloths (potential static arc). • Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present. • Ground equipment and
conductive objects in work area. See Grounding instructions on page 6. • If there is static sparking or you feel a shock,
stop operation immediately. Do not use equipment until you identify and correct the problem.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on the skin, inhaled, or swallowed.
• Read MSDS’s to know the specific hazards of the fluids you are using. • Store hazardous fluid in approved containers,
and dispose of it according to applicable guidelines. • Gloves must be worn for spraying or cleaning the equipment.
INSTRUCTIONS
GB

A
C
D
EFGH
B
Typical Installation
D
F
G
H
E
D
C
The spray guns were designed to produce the highest
quality finish with today’s automotive paint systems.
The HVLP and Compliant guns typically utilize
200 kPa, 2.0 bar (29 psi) inbound air pressure to
produce high quality paint finishes and comply with
environmental regulations.
The air regulator must have a minimum air flow
capacity of 849 l/min or 30 scfm at 0.7 MPa, 7 bar
(100 psi) air pressure.
Flushing the Spray Gun
Note: Flush the spray gun before putting any paint through the gun.
To flush the gun, squeeze water or solvent into the gun adapter while
triggering the gun.
Make sure to use a solvent that is compatible with paint to be sprayed.
1. Connect the air hose (D) to the 1/4 npsm air inlet (C).
2. Connect the other end of the air hose (D) to a regulated air
supply line (H).
NOTE: Fig. 3 shows the filter (G) air regulator (F), and air shut-off
valve (E) on the air supply line.
Connecting the Air Line
•You must install an air pressure regulator (F) on the gun air line to
control air pressure to the gun. See Fig. 3.
•If your regulated air source does not have a filter, install an air filter
(G) on the air line to ensure a dry, clean air supply to the gun.
Dirt and moisture can ruin the appearance of your finished
workpiece. See Fig. 3.
• Use a 7.9 mm (5/16") I.D. air hose to minimize excessive pressure
drop in the hose.
Ventilate the Spray Booth
WARNING
To prevent hazardous concentrations of
toxic and/or flammable vapours, spray
only in a properly ventilated spray
booth. Do not operate the spray gun
unless ventilation fans are operating.
Check and follow all of the National
and Local codes regarding air exhaust
velocity requirements.
Check and follow all local safety and fire codes.
Setup
3
KEY
AGun
See page 14 for
gun part numbers.
B 3M PPS Cup System
C Needle Valve Inlet;
1/4 npsm
D Air Hose
Recommend 7.9mm (5/16") ID hose
Optional 9.5mm (3/8") ID hose
E Air Shut-off Valve
F Air Regulator
G Air Filter
H Air Supply Line
Fig. 1
Fig. 2
Fig. 3
GB

Setup
Installing 3M™Paint Preparation System (PPS)
1. Weigh paint in the cup with liner according to paint manufacturer’s
instructions before mixing product.
2. Mix product as needed.
3. Take the lid (with built in strainer) and snap onto the top of
PPS cup.
4. Position locking collar onto the PPS cup and turn until tight.
5. With spray gun inverted, lower onto PPS cup and lock gun
adapter, turning clockwise, to lid.
6. Make sure that the lid fingers are fully engaged above
adapter edge.
7. With air line connected, invert gun and pull trigger (fully open
NOT partially) to bleed air from the liner. NOTE: Air only needs
to be bled if spraying in the inverted position.
8. With the air removed from the liner, the gun may be sprayed
upside down or in any direction to reach difficult areas.
Vertical Pattern
Horizontal Pattern
Positioning the Air Cap
Rotate the air cap as needed to achieve the desired spray pattern
direction. To create a round pattern, turn the pattern air off by turning
the pattern adjustment knob (25) fully clockwise. Refer to Fig. 11.
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you are instructed to
relieve pressure, follow the Pressure Relief Procedure on page 6.
WARNING
4
Fig. 4
Fig. 6 Fig. 9
Fig. 5
Paint
cup
Locking
Collar
Paint
cup liner
Sealing
Cap
Paint
cup lid
200
Micron
Strainer
Fig. 7
Fig. 8
GB

25
21
open
F
Setup
Adjusting the Spray Pattern
Follow these steps to establish the correct fluid flow and air flow:
1. Turn the fluid adjustment knob (21) counter clockwise until no
restriction of the trigger movement is felt, then turn out another
half turn. When the knob is turned far enough, the trigger should
be able to touch the gun handle when the gun is triggered.
2. Turn the pattern adjustment valve (25) fully counter clockwise to
achieve the widest fan pattern.
3. Adjust the air supply regulator (F) to about 100 psi.
4. Trigger the gun and adjust the gun inlet pressure, turning the
needle valve at the gun air inlet:
HVLP, Compliant 200 kPa, 2.0 bar (29 psi)
Air Spray 345 kPa, 3.4 bar (50 psi)
5. Spray a test pattern to evaluate fluid flow and atomization.
6. To reach the desired pattern width, fluid flow rate, and finish,
make the following adjustments:
• For a narrower pattern (25), turn the pattern adjustment
valve clockwise.
• To reduce the fluid flow, turn the fluid adjustment valve (21)
clockwise to limit the trigger travel or replace the nozzle with a
smaller orifice.
• To improve atomization, reduce the fluid flow rate. Increasing the
air pressure can improve atomization but may result in poor
Transfer Efficiency (TE) or non-compliant operation.
7. For HVLP only, to measure the aircap atomizing pressures, use
the accessory aircap verification kit.
NOTES:
• If the fluid adjustment knob is turned clockwise all the way the gun
will emit only air.
• For maximum transfer efficiency, always use the lowest air setting
needed to achieve the desired finish.
• If available, use the fluid manufacturer’s recommendations for this
gun model to set the air line pressure.
•For Compliant guns, to maintain compliant operation
(TE equal to HVLP) the gun inlet pressure must not exceed
200 kPa, 2.0 bar (29 psi).
•For HVLP guns, at 200 kPa, 2.0 bar (29 psi) gun inlet air pressure,
the pressure at the aircap will be 70 kpa, 0.7 bar (10 psi).
•For HVLP guns, local laws may limit the maximum automatic air
pressure to 70 kPa, 0.7 bar (10 psi) at the air cap for HVLP
compliance. The accessory Air Cap Verification Kit 50280 is
available to measure the atomizing pressure at the air cap.
PRESSURIZED EQUIPMENT HAZARD
To avoid injury, never open the fluid adjustment knob (21) beyond the
one half turn indicated in Adjusting the Spray Pattern. If the red
band or undercut on the knob stem (21) is visible, the knob is not
adjusted correctly and could result in serious injury. Repeat steps in
Adjusting the Spray Pattern.
WARNING
5
Fig. 10
Fig. 12
Fig. 11
Close
(narrower
pattern)
Open
(wider
pattern)
GB

Operation
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually relieved to prevent the
system from starting or spraying accidentally. To reduce the risk of
an injury from accidental spray from the gun, 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 nozzle.
WARNING
Pressure Relief Procedure
RIGHT
1. Turn off the air supply to the gun.
2. Disconnect air line from the gun.
3. Invert gun and pull trigger (fully open, not partially) to return
mix to gun cap.
Grounding
Ground all equipment and conductive objects and use only grounded
hoses and pails.
Fig. 13
Fig. 14
Applying the Fluid
1. To achieve the best results when applying fluid, keep the gun
perpendicular to the surface and maintain a consistent distance
of approximately 150 to 200 mm (6 to 8 inches) from the object
being sprayed. See Fig. 14.
2. To obtain an even finish, use smooth, even strokes across the
surface to be sprayed with 50% overlap. The PPS gun cup is a
sealed system and can be sprayed in any direction without spills
on vertical or horizontal surfaces.
3. Paint using parallel strokes. This spray gun applies all coatings
evenly without cross coating.
6
WRONG
GB

Daily Gun Care, Flushing and Cleaning
General System Maintenance Check
✔Relieve the pressure.
✔Clean the fluid and air line filters daily.
✔Check for any fluid leakage from the gun and fluid hoses.
✔Flush the gun before changing colours and whenever you are done
operating the gun.
Solvent left in gun air passages could result in a poor quality paint finish. Do not use any cleaning method which may allow solvent into the gun
air passages. Do not expose needle valve and gauge (30) to solvents or gauge may be damaged.
Do not point the gun up while cleaning it.
Do not immerse the gun in solvent.
Do not wipe the gun with a cloth soaked
in excessive solvent; ring out the excess.
Do not use metal tools to clean the air cap
holes as this may scratch them; scratches
can distort the spray pattern.
CAUTION
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief
Procedure on page 6 whenever you are instructed to relieve pressure.
WARNING
Daily Gun Care and Cleaning
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief
Procedure on page 6 whenever you are instructed to relieve pressure.
WARNING
Removing the paint supply
Cleaning the gun
1. Relieve the pressure, page 6.
2. Remove PPS cup by inverting the gun. Turn the gun
counterclockwise unlocking the gun adapter from the paint cup.
3. Flush the spray gun, page 3.
4. To retain unused paint, seal the lid with the PPS sealing cap,
label, and temporarily store mixed material in PPS cup.
5. When the PPS cup is empty the collapsed liner and lid may be
disposed. Consult all local and national regulations or authorities
for proper disposal.
1. Remove the air cap retaining ring (15) and air cap (14).
2. Trigger the gun while you remove the fluid nozzle (12) from the
gun with the gun tool (28).
Trigger the gun whenever you tighten or remove the nozzle. This
keeps the needle seat away from the nozzle seating surface and
prevents the seat from being damaged.
CAUTION
3. Clean the air cap retaining ring, air cap, and fluid nozzle
with solvent.
4. Dip the end of a soft-bristle brush into a compatible solvent.
Do not continuously soak the brush’s bristles with solvent and do
not use a wire brush.
Fig. 15
Fig. 16
7
12
2814, 15
GB

5. With the gun pointed down, clean the front of the gun, using the
soft-bristle brush and solvent.
6. Scrub the air cap retaining ring, air cap, and fluid nozzle with the
soft-bristle brush. To clean out air cap holes, use the small brush
provided. Clean the air cap and fluid nozzle daily, minimum.
Some applications require more frequent cleaning. Do not soak
the air cap retaining ring in solvent for prolonged periods of time.
7. To avoid galling of the fluid nozzle in the spray housing (2a) apply
a thin film of lubricant to the back surface of the nozzle taper
where it seats and also to the nozzle threads. Trigger the gun while
you install the fluid nozzle (12) with the gun tool (28). Tighten the
nozzle securely to 4.5 N•m (40 in-lb) to obtain a good seal.
Do not over torque.
8. Install the air cap retaining ring (15) and air cap (14).
9. Dampen a soft cloth with solvent and wring-out the excess.
Point the gun down and wipe off the outside of the gun.
Daily Gun Care and Cleaning
Fig. 19
Fig. 17 Fig. 18
Fig. 20
Troubleshooting
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief
Procedure on page 6 whenever you are instructed to relieve pressure.
WARNING
Correct fan pattern Follow all Setup procedures, starting on page 3. Hang some 3M masking paper. Hold spray gun with
Air Cap perpendicular and 200mm (8") from masking paper. Spray for two seconds and check what
you get for fan pattern outline on the paper. See troubleshooting chart for how to adjust / service
spray gun to correct Fan Pattern defects.
Fluttering or spitting spray
PROBLEM CAUSE AND SOLUTION
Loose or damaged fluid tip/seat (Tighten or replace).
Material level too low in cup (Refill cup).
Gun cup tilted too far over or upside down while spraying (Purge Air out of PPS cup).
Partial obstruction in fluid passage (Flush with solvent).
Dry or loose fluid needle packing nut (Lubricate or tighten).
Pattern is curved Air Cap or Fluid Tip Defective. Determine if defect is in the Air Cap or Fluid Tip. Rotate Air Cap
one-half turn and spray another test pattern. If defect is inverted/reverse of previous fan pattern,
then defect is in the Air Cap. Clean Air Cap.
If defect is not inverted/reverse of previous Fan Pattern, defect is in the Fluid Tip. Check Fluid Tip for
damage or partial blockage with dried material. Check Fluid Needle Tip for damage. Replace as necessary.
Torque to 4.5 N•m (40 in-lb)
8
712
2814, 15
7
GB

Starving Fan Pattern.
Fan pattern begins to narrow down.
PROBLEM SOLUTION
PPS liner bottomed out on top of strainer or collapsed around strainer, blocking flow (Disconnect air,
with PPS cup below gun, pull trigger to re-open liner, re-connect air and spray mix without purging air
from liner).
Air supply pressure drops due to air supply defects such as other air tools being used draws down
system pressure & CFM flow.
Pattern is off-set or heavy on one end One or more Air Horn holes plugged (Clean Air Cap).
Fluid Needle Tip damaged (Replace Fluid Needle Tip).
Fluid Nozzle damaged or partially blocked (Clean and/or replace Fluid Nozzle).
Pattern is heavy in the centre Air Pressure is too low (Increase Air Pressure).
Fan Pattern set too narrow (Open Fan Pattern).
Material is too thick (Reduce / Thin the mix).
Pattern is split Air Pressure is too high (Reduce Air Pressure).
Fan Pattern set too wide (Close down Fan Pattern).
Will not spray. Not enough flow/air pressure at gun (Check air supply source and hose).
Fluid needle not open enough (Open fluid needle more).
Mix is too thick for fluid tip size (Change to larger size).
Fluid leaking/dripping from PPS cup. PPS cup lid loose (Tighten PPS Locking Collar).
Crack in PPS Lid or Liner (Replace).
PPS lid spout not fully engaged with PPS Adapter.
Fluid leaking/dripping from gun. Check for missing or damaged O-ring (34) at base of Fluid Nozzle on the Fluid/Adapter Housing.
Fluid needle packing nut too tight or binding (Loosen nut or lubricate needle shaft).
Needle tip damaged (Replace).
Fluid Nozzle nicked or damaged (Replace).
Mix residue dried in gun (Clean & Lube gun).
Excessive overspray. Too much air pressure (Reduce air pressure).
Gun too far from work surface (Move in and keep the fan pattern perpendicular to the surface to
be sprayed).
PROBLEM CAUSE AND SOLUTION
Troubleshooting
9
GB

1
2
3
4
5
6
7
1
4
2a2b*
5*
89
10
11
17
1213
1413a
15
26*
16*
22*
20*
23*
19
24
25c
21
25a
25b*
25d
18
30
30a
34*
15b*
1
1
1
1
2
2
3
3
3
3
5
4
6
6
7
A
35*
HVLP and
Compliant
(groove)
Airspray(no
groove)
HVLP
(smaller ID)
Airspray
andCompliant
2928
Service
Fig. 21
Lightly lubricate
Lightly lubricate threads
Torque to 14-15 N•m (125-135 in-lb)
Torque to 2.3-3.4 N•m (20-30 in-lb)
U-cup lips face air valve assembly (26)
U-cup lips face away from nut (19/25a)
Torque to 4.5 N•m (40 in-lb)
* Parts included in Rebuild Kit 50275
10
Item 2 includes 2a-2b
Item 13 includes 13a
Item 25 includes 25a-25d
GB

12
15B
28
14, 15
5*
8
1
4
2a2b*
5*
89
11
12
14
15
18
34*
15b*
17
10
Service
Replacing the air and fluid packings
with gun rebuild kit 50275 Replacing the spray housing o-rings and packings
Tools needed:
•Wrench 8 mm (5/16 in.)
• Wrench 19 mm (3/4 in.)
• Gun Tool (28) supplied with gun
• Packing Installation Tool (29) supplied with gun
• Mechanics O-ring pick
• Needle nose pliers
• Gun Lube Part No. 50281
NOTE:
•Gun Repair Kit 50275 comes complete with all air and fluid seals
required to rebuild the spray gun.
• Clean parts with a solvent that is compatible with the parts and
the fluid being sprayed.
• Lightly lubricate the parts indicated in Fig. 21 with lubricant 50281.
This item is not included with gun.
Disassembling the gun
1. Relieve the pressure.
2. Flush the spray gun, page 3.
3. Remove the air cap retaining ring (15) and air cap (14).
Remove and replace the seal (15B). See Fig. 22.
1. With the spray housing (2a) removed from the adapter (4), use a
mechanical pick to remove the o-ring (2b) from the housing (2a).
2. Remove o-ring (34) from the adapter (4). See Fig. 23.
NOTE: O-ring (2b) is slightly larger than o-ring (34).
3. Install a new o-ring (34) into the adapter (4). Install a new o-ring
(2b) into the housing (2a).
NOTE: To ease o-ring installation, place the adapter (4) into the
spray housing (2a) to plug the end. Install one end of the o-ring
into the groove in the housing, then press the rest of the o-ring
into place.
4. Unscrew the packing screw (8) from the adapter (4) with the
gun tool (28).
5. Using a mechanical pick, push the three fluid packings (5) out of
the adapter (4). Be careful not to damage the adapter. Discard the
old fluid packings.
6. Place the new fluid packings (5) and packing screw (8) onto the
needle (13). See Fig. 24 for the orientation of the parts.
7. Insert the fluid needle (13) into the back of the adapter (4) to
install the fluid packings (5).
8. Tighten the packing screw (8) just enough to hold the packings (5)
in the adapter (4). The needle (13) must move freely.
Remove the needle.
4. Trigger the gun while you remove the fluid nozzle (12) with the
gun tool (28).
5. Remove the fluid adjustment knob (21) and fluid spring (23).
See Fig. 21, page 10.
6. Pull the fluid needle (13) out the back of the gun.
7. Remove the screw (11), pin (17), wave washer (18), and trigger (10).
8. Remove the hex nut (9) with the gun tool (28).
9. Remove the spray housing (2a) and adapter (4).
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the Pressure Relief
Procedure on page 6 whenever you are instructed to relieve pressure.
WARNING
Fig. 22
Trigger the gun whenever you tighten or remove the nozzle. This
keeps the needle seat away from the nozzle seating surface and
prevents the seat from being damaged.
CAUTION
Fig. 23
Fig. 24
11
GB

Service
Replacing the pattern adjustment
valve packings Replacing the fluid valve packings
1. Unscrew the pattern adjustment valve assembly (25). See fig. 25.
2. Using needle nose pliers, remove the retaining ring (25d) and
unscrew the pattern adjustment valve (25c).
3. Using a mechanical pick, remove the u-cup packings (25b) from
the pattern adjustment nut (25a). Be careful not to damage the
seal surface or the nut’s internal threads.
4. One at a time, install the new u-cup packings (25b) with the
packing installation tool (29); the u-cup lips must face toward the
tool as shown in Fig. 28.
5. Push each u-cup packing (25b) into the pattern adjustment nut
(25a) until a definite snap is felt.
6. Lubricate the pattern adjustment valve (25c) threads and install
the valve into the nut (25a). Install the retaining ring (25d), then
back out the pattern adjustment valve as far as the retaining ring
allows it to go.
1. Remove the fluid valve nut (19), air valve spring (22), and air valve
assembly (26). Discard the air valve assembly. See Fig. 26.
2. Using a mechanical pick, remove the u-cup packing (16) from the
gun body.
3. Place the new u-cup packing (16) on the packing installation tool
(29), with the u-cup lips facing the tool as shown in Fig. 27.
4. Push the packing (16) into the back of the gun until a definite
snap is felt.
5. Using a mechanical pick, remove the u-cup packing (20) and
spacer (35) from the fluid valve nut (19). Be careful not to damage
the seal surface or the nut’s internal threads.
6. Install a new u-cup packing (20) with the packing installation tool
(29); the u-cup lips must face toward the tool as shown in Fig. 28.
This will help apply even pressure to the u-cup lips and avoid
damaging them.
7. Push the u-cup packing (20) and spacer (35) into the fluid valve
nut (19) until a definite snap is felt.
1
25c
25a
25b*
25d
1
13
13a
26*
16*
22* 20*
23*
1921
35*
20 or 25b*
29
*U-cup lips
facethe tool
19or 25a
*U-cup lipsfacethe
tool
16*
29
Fig. 25 Fig. 26
Fig. 28
Fig. 27
12
GB

13 26 B
Service
Reassembling the gun
NOTE: To ensure proper alignment of the parts, follow the next steps
in the order they are given.
1. Slide the adapter (4) into the spray housing (2a), and install them
onto the gun body (1). Align the housing with the slot and lip (A)
on the gun body (1). See Fig. 21 page 10.
2. Tighten the hex nut (9) onto the adapter (4) hand-tight, then loosen
the nut about one turn so the adapter (4) and spray housing sit
loosely in the gun body.
3. Check the fluid needle (13) for damage or excessive wear.
Replace needle tip or entire needle if necessary. If replacing
needle tip, use low strength thread locker on needle tip threads.
4. Lubricate the outside of the new air valve assembly (26) and place
it on the fluid needle (13), against the nut (B). See Fig. 29.
This helps align the entrance of the air valve stem into the inside
diameter of the u-cup (16) without damaging the u-cup lid.
5. Install the fluid needle (13) and the air valve assembly (26) into the
back of the gun.
6. Install a new air valve spring (22). Point the gun down to centre
the spring (22) and tighten the fluid nut (19) to 14-15 N•m
(125-135 in-lb).
7. Replace and install a new needle spring (23). Install fluid
adjustment knob (21).
8. Install the trigger (10), pivot pin (17), wave washer (18), and
screw (11). Torque the screw to 2.3-3.4 N•m (20-30 in-lb).
9. To avoid galling of the fluid nozzle in the spray housing (2a) apply
a thin film of lubricant to the back surface of the nozzle taper
where it seats and also to the nozzle threads. Trigger the gun
while you install the fluid nozzle (12) with the gun tool (28).
Tighten the nozzle securely to 4.5 N•m (40 in-lb) to obtain a
good seal. Do not over torque.
10. Tighten the hex nut (9) securely to 14-15 N•m (125-135 in-lb).
11. Install the pattern adjustment valve assembly (25).
Torque the nut (25a) to 14-15 N•m (125-135 in-lb).
12. To tighten the packing screw (8), turn the screw in until it touches
the fluid packings (5), then tighten one full turn to pre-set the
packings. Loosen the screw, then turn it in until it touches the
packings again.Tighten the screw 1/12 turn more (equal to half
the distance between points on the hex head).
13. Trigger the gun to test the needle movement. If the needle does
not return after the trigger is released or is slow in returning,
loosen the packing screw (8) until the needle returns freely.
14. Install the air cap (14) and air cap retaining ring (15).
Hand tighten the ring.
15. Make sure the gun fluid packings are sealing properly by spraying
solvent at low pressure before fully pressurizing the gun with the
fluid to be sprayed.
If the fluid packings leak, tighten the packing screw (8) slightly
and re-test until the packings and fluid needle seal completely.
Fig. 29
13
GB

TI3619E
1
4
2a
2b*
5*
8
9
10
11
17
1213
1413a
15
26*
16*
22*20*
23*
19
24
25c
21
25a
25b*
25d
18
3030a
34*
15b*
A
35*
HVLP and
Compliant
(groove)
HVLP
(smaller ID)
Airspray
andCompliant
2928
Airspray
(nogroove)
Parts
Ref. No. Description Qty.
1COLLAR, locking 1
2 LID, paint cup 1
3 STRAINER, 200 micron 1
4 LINER 1
5 CUP 1
6 CAP, sealing 1
PPS Paint Cup Assembly
Needle/Nozzle Kits for HVLP, Compliant, and Air Spray Guns
HVLP, Compliant, and Air Spray Guns
Ref. Part Description Qty.
No. No.
1BODY, gun 1
2 SPRAY HOUSING ASSY.;
Includes 2a-2b 1
2a • HOUSING, spray 1
2b* • O-RING, CV75 1
4 ADAPTER, gun 1
5* PACKINGS, fluid 1
8 SCREW, packing 1
9 NUT, hex; 1/2-20 UNF 1
10 TRIGGER 1
11 SCREW, trigger lock 1
12✩NOZZLE, fluid 1
13✩NEEDLE ASSY.; Includes
replaceable item 13a 1
13a✩50271 • TIP, needle 1
14 50274 AIR CAP, hvlp 1
50273 AIR CAP, compliant
50272 AIR CAP, air spray
15 50270 RING, air cap retaining 1
15b* SEAL, air cap retaining ring 1
16* U-CUP 1
17 PIN, pivot 1
18 WASHER, wave 1
19 NUT, fluid valve 1
20* U-CUP 1
21 KNOB, fluid adjustment 1
22* SPRING, air valve 1
23* SPRING, needle 1
24 FITTING, air inlet 1
25 PATTERN ADJUSTMENT
VALVE ASSY.; Includes
items 25a - 25d 1
25a • NUT, pattern adjustment 1
25b* • U-CUP 2
25c • VALVE, pattern adjustment 1
25d • RING, retaining 1
26* AIR VALVE ASSY. 1
28♦TOOL, gun 1
29♦TOOL, packing installation 1
30 50279 VALVE, needle assy.
Includes item 30a 1
30a • GAUGE, pressure 1
32** 50281 LUBRICANT, 1oz. tube 1
33 50282 BRUSH KIT 1
34* 50276 O-RING 1
35* SPACER, u-cup 1
✩See chart for part number.
* These parts are included in Rebuild Kit 50275,
which may be purchased separately.
♦Included in tool kit 50278.
** Item not included with gun.
Item 12 Item 13 Orifice Size
Nozzle needle Assy. mm (in.)
includes item 13a
50266 50265 1.3 (.051)
50267 50265 1.4 (.055)
50268 50265 1.5 (.059)
50269 50265 1.8 (.070)
14
6
2
3
4
5
1
Item 2 includes 2a-2b
Item 13 includes 13a
Item 25 includes 25a-25d
GB

Accessories Technical Data
Dimensions
HVLP Models
Air Pressure Verification Kit 50280
For use in checking air cap atomizing air pressure.
Not to be used for actual spraying.
Install the kit air cap on the gun. Turn on the air to the
gun, then trigger the gun and read the air pressure on
the gauge.
NOTE: To be ‘HVLP compliant’, the atomizing air
pressure must not exceed 70 kPa, 0.7 bar (10 psi).
* All readings were taken with the gun controls fully open and
with 280 kPa, 2.8 bar (40 psi). Sound pressure was tested to
CAGI-PNUEROP-1969. Sound power was tested to ISO 3744-1981.
170 mm
(6.7 in)
193 mm
(7.6 in)
Category Data
Maximum Working AIr Pressure 0.7 MPa, 7 bar (100 psi)
Maximum Inbound HVLP and Compliant Spray Guns
Air Pressure Should not exceed 200 kPa,
2.0 bar (29 psi)
Maximum Outbound HVLP Only
Air Pressure Should not exceed 70 kPa,
0.7 bar (10 psi) at the Air Cap
Air Consumption HVLP at 200 kPa, 2.0 bar
(29 psi) = 439 l/min or 15.5 scfm
Compliant at 200 kPa, 2.0 bar
(29 psi) = 317 l/min or 11.2 scfm
Airspray at 345 kPa, 3.4 bar
(50 psi) = 399 l/min or 14.1 scfm
Fluid and Air Operating 0°C to 43°C (32°F to 109°F)
Temperature Range
Weight 632 g (22.3 oz.)
Air Inlet 1/4 - 18 npsm
Wetted Parts 304 and 303 Stainless Steel,
PEEK, Acetal, Ultra High
Molecular Weight Polyethylene
Noise Data*
Sound Pressure 84.4 Db(A)
Sound Power 94.0 Db(A)
15
GB

3M Paint Preparation System
Spray Gun Warranty and Limited Remedy
3M warrants that, when used in accordance with 3M’s written instructions, 3M™PPS Spray Guns will be free of defects in materials
and manufacture for one year from the date of purchase. This warranty does not apply to damage or malfunction caused by normal
wear, failure to maintain, or by any abuse, accident, tampering, alteration or misuse of the Spray Gun.
To make a claim under the warranty, you must first contact 3M Customer Services on: 0161 2376391. Spray Guns must be returned,
freight prepaid by the purchaser, to the service location address given by the 3M Customer Services. Upon validation of the
Warranty claim, 3M will replace or repair the Spray Gun, at 3M’s option, and return it to the purchaser at 3M’s expense,
including parts, labour and return shipping charges. If it is determined that the claim is not covered by the warranty, the purchaser
will be given the option to have the Spray Gun repaired outside of the warranty. An estimate of parts and labour will be provided by
3M and must be approved by the purchaser in advance.
For all other matters 3M standard terms and conditions of sale shall apply.
All written and visual data contained in this document reflects the latest product information available at the time of publications.
3M™reserves the right to make changes at any time without notice.
3M™Automotive Aftermarket Division
3M Centre, Cain Road,
Bracknell,
Berkshire, RG12 8HT
3M™is a registered trademark of 3M. Graco®is a registered trademark of Graco, Inc.
© 3M 2005
16
™
GB

Mode d’emploi
3
Système de Préparation de Peinture Simplifiée
Pistolets Peinture
Sommaire
Avertissements 2
Guide de sélection 2
Installation type 3
Mise en oeuvre 3
Utilisation 6
Entretien quotidien 7
Disfonctionnements et solutions 8
Entretien courant 10
Pièces détachées 14
Accessoires 15
Caractéristiques techniques 15
Garantie 16
Nous contacter 16
II 2 G
Manufactured by
®
F
Pistolets HVLP, Haut Transfert et Conventionnel
Pression d'air maximum du réseau : 700 KPa, 7.0 bar (100 psi)
Pression d'air maximum d’entrée (à la crosse) :
pour HVLP et Haut Transfert : 200 kPa, 2.0 bar (29 psi)
pour Conventionnel : 345 kPa, 3.4 bar (50 psi)
Demande de brevet U.S. déposée
Mise en garde : L’utilisation des pistolets 3M-Graco est réservée aux peintres
professionnels ayant préalablement suivi une formation appropriée.
Ils doivent strictement être utilisés pour la pulvérisation de revêtements liquides (type
peinture, apprêt, vernis etc..) dans des zones dotées des équipements adaptés en
stricte conformité avec les réglementations nationales et européennes en vigueur.
Important : avant toute mise en œuvre,
lire ce mode d’emploi dans son intégralité.

Pistolets Peinture PPS Guide de Sélection
Avertissements
Réf. Kit : Pistolet Diamètre d'orifice Largeur de jet(*) Lettre sur Couleur
+ système PPS mm (pouces) mm (pouces) chapeau d'air du corps
Pistolets HVLP– 50261 1,3 (0,051) 330 (13) H Violet
pour haut rendement 50262 1,4 (0,055) 330 (13) H Violet
à basse pression 50263 1,5 (0,059) 330 (13) H Violet
Conventionnel 50255 1,5 (0,059) 228 (9) A Noir
50256 1,8 (0,070) 228 (9) A Noir
Haut Transfert 50257 1,3 (0,051) 279 (11) C Or
50258 1,4 (0,055) 279 (11) C Or
50259 1,5 (0,059) 279 (11) C Or
(*) Mesurée avec la buse du pistolet à 20cms
(8 pouces) de la surface à peindre.
Sélection du diamètre de buse
Se référer aux recommandations de diamètre de buse du fournisseur de peinture. En règle générale, utiliser les plus petits
diamètres de buse pour les faibles débits ou les peintures peu visqueuses et les plus grands diamètres de buse pour les débits plus
élevés et les peintures plus visqueuses.
Ce symbole signale les risques d'endommagement ou de
destruction du matériel en cas de non-respect des
instructions d’emploi.
Ce symbole signale les risques de blessure ou de mort en cas
de non-respect des instructions d’emploi.
Symbole d'avertissement Symbole de précaution
ATTENTION
DANGER
2
RISQUE DE MAUVAIS EMPLOI DE L'EQUIPEMENT
Une utilisation non conforme aux recommandations d’emploi peut causer la mort ou des blessures graves.
• La pression d’air et la température maximum de fonctionnement de l’équipement ne doit pas excéder celles du composant aux valeurs les
plus faibles. (Se rapporter aux caractéristiques techniques des différents composants de l’équipement). • Utiliser des fluides et des solvants
compatibles avec les parties humides des pistolets et des équipements associés. (Se rapporter aux caractéristiques techniques des différents
composants de l’équipement) • Se rapporter aux fiches de données de sécurité des fabricants de revêtements liquides et de solvants.
• Vérifier les équipements une fois par jour. Réparer ou remplacer immédiatement toute pièce usée ou endommagée. • Ne jamais altérer ou
modifier les équipements. • Utiliser les équipements uniquement aux fins pour lesquelles ils ont été conçus. (Voir mise en garde en
première page) • Installer les flexibles et les câbles hors des zones de circulation, loin des arêtes vives, des pièces en mouvement et des
surfaces chaudes. • Ne jamais utiliser les flexibles pour tirer les équipements. • Observer toutes les réglementations de sécurité en vigueur.
• Ce matériel doit être utilisé uniquement par des techniciens professionnels informés et familiers des dangers potentiels.
• Lire tous les manuels d’instruction, repères et étiquettes avant de faire fonctionner le matériel.
RISQUE DES EQUIPEMENTS SOUS PRESSION
Afin de réduire le risque de blessures graves, suivre la procédure de relâchement de la pression, chapitre
Utilisation en page 6 du manuel, à chaque fois que la pression doit être délestée.
• Ne pas essayer d’arrêter ni de détourner les fuites de fluide avec les mains, le corps, un gant ou un chiffon.
• Ne jamais pointer le pistolet pulvérisateur sur quelqu’un ou sur une quelconque partie du corps.
RISQUE D'INCENDIE ET D'EXPLOSION
Les vapeurs inflammables, telles que les vapeurs de solvant et de peinture, dans la zone de travail peuvent
s'enflammer ou exploser. Pour réduire les risques d'incendie et d'explosion :
• Utiliser les pistolets seulement dans des zones bien ventilées. • Eliminer toutes les sources d' ignition telles que les flammes, la chaleur, les
cigarettes, les lampes électriques portables et les rideaux plastiques (possibilité d'arc statique). • Tenir la zone de travail propre et exempte de
débris, solvants, chiffons et essence. • Ne jamais brancher ou débrancher des cordons d'alimentation ni allumer ou éteindre une lampe en
présence de vapeurs inflammables. • Mettre à la terre le matériel et les objets conducteurs dans la zone de travail. (Consulter les instructions
de Mise à la terre en page 6.) • En cas de décharge électrostatique ou de choc électrique, arrêter immédiatement l'exploitation. Ne plus
utiliser le pistolet et les équipements associés tant que le problème n'a pas été identifié et corrigé.
RISQUES RELATIFS A L’EXPOSITION AUX FLUIDES OU VAPEURS
Les fluides et/ou leurs vapeurs peuvent causer des effets graves en cas d’inhalation, de contact avec la peau et
les yeux, et en cas d’ingestion.
• Lire les fiches de données de sécurité des fluides utilisés pour connaître leurs risques spécifiques et les précautions d’emploi adéquates.
• Conserver les fluides dangereux dans des récipients approuvés, hermétiquement fermés, en dehors de l’utilisation et éliminer les déchets
conformément aux directives en vigueur. • Le port d’équipements de protection individuelle adapté (masques, casques anti-bruit, lunettes,
gants etc..) est fortement recommandé lors des étapes de préparation, de pulvérisation des revêtements et du nettoyage des équipements.
DANGER
INSTRUCTIONS
F

A
C
D
EFGH
B
Installation type
D
F
G
H
E
D
C
Les pistolets peinture ont été conçus pour produire
la plus haute qualité de finition avec les peintures
automobiles d'aujourd'hui.
Les pistolets HVLP et Haut Transfert utilisent
normalement une pression d'admission d'air de
200 kPa, 2.0 bar (29 psi) pour produire des finitions
de peinture de haute qualité et être conformes aux
réglementations nationales et européennes
concernant l'environnement.
Le régulateur doit fournir un air propre et sec et avoir
un débit d'air minimum de 849 l/min (30 scfm) à une
pression d'air de 700kPa, 7.0 bar (100 psi).
Rinçage du pistolet
NOTE : Rincer le pistolet avant de mettre de la peinture dans le pistolet.
Pour rincer le pistolet, injecter de l'eau ou du solvant dans l'adaptateur
du pistolet(4) tout en appuyant sur la gâchette. Vérifier préalablement
que le solvant utilisé est compatible avec la peinture à appliquer.
1. Connecter le flexible d'air (D) sur le raccord d'admission 1/4 npsm (C).
2. Connecter l'autre extrémité du flexible d'air (D) à un circuit d'air
comprimé régulé (H).
NOTE : La Figure 3 montre le filtre (G) le régulateur d'air (F) et le
robinet d'arrêt d'air (E) du circuit d'air comprimé.
Branchement du circuit d'air comprimé
(Figure 3)
• Il est impératif d’installer un régulateur de pression d'air (F) sur le
circuit d'air comprimé pour contrôler la pression d'alimentation
du pistolet.
• Si la source d'air contrôlé ne possède pas de filtre, installer un
filtre à air (G) sur le circuit de manière à ce que le pistolet reçoive
de l'air sec et propre car, les poussières et l'humidité peuvent
altérer le résultat du travail.
• Utiliser un flexible de 8 mm (5/16 pouces) de diamètre intérieur
pour éviter toute chute de pression excessive dans le flexible.
Ventiler la cabine de peinture
DANGER
Pour limiter les expositions et/ou contrôler les
émissions de vapeurs, utiliser seulement le
pistolet dans une cabine de peinture équipée
d’une ventilation extractive appropriée et en
état de fonctionnement.
Vérifier et respecter toutes les réglementations
nationales et européennes concernant les
spécifications de vélocité d'air d'échappement.
Vérifier et respecter toutes les réglementations
nationales et européennes de sécurité et de
prévention des incendies.
Mise en oeuvre
3
LEGENDE
A Pistolet
(voir réf. pièces
page 14)
B Système PPS de 3M
C Valve réglage pression
d’air avec manomètre
(1/4 npsm)
D Flexible d'air
Recommandation
Flexible dia. intérieur 8 mm (5/16")
Optionnel
Flexible dia. intérieur 9,5 mm (3/8")
E Robinet d'arrêt d'air
F Régulateur d'air
G Filtre à air
H Réseau d'alimentation d'air
Fig. 1
Fig. 2
Fig. 3
F

Mise en oeuvre
Installation du Système de Préparation de Peinture Simplifiée 3M™(PPS)
1. Peser la peinture dans le godet préalablement équipé de la poche
jetable (Voir Figure 4) afin de réaliser le mélange selon les
instructions du fabricant de peinture.
2. Préparer autant de produit que nécessaire.
3. Prendre un couvercle –filtre et le «clipser» sur la poche souple dans
le godet rigide.
4. Visser la bague de serrage sur l’ensemble godet pour une
fermeture hermétique.
5. Retourner le pistolet et verrouiller, d’un quart de tour, l’adaptateur
du pistolet sur le couvercle.(Voir Figures 5 et 6)
6. Vérifier que les ergots du couvercle sont bien engagés au-dessus
du bord de l'adaptateur. (Voir Figure 6)
7. L'air comprimé étant connecté, retourner le pistolet et appuyer sur
la gâchette (à fonds et NON partiellement) pour purger l'air de la
poche et la comprimer. Note : L'air doit être purgé uniquement
lors de pulvérisation du pistolet en position retournée.
8. Une fois l'air éliminé de la poche, le pistolet peut être utilisé en
position inversée ou dans toute autre direction pour atteindre les
zones difficiles (passages de roues, compartiment moteur etc..)
4
Fig. 4
Fig. 6
Fig. 5
Godet
rigide
Bague de
serrage
Poche
jetable
Bouchon
Couvercle
Filtre 200
microns
Fig. 7
Fig. 8
F