Graco 980 User manual

308810
Rev. F
8066B
Model 980P
240100 Model 980P, without fluid set
240103 Model 980P, with # 3 fluid set
Model 980S
Includes 1-quart (1 liter) cup
240090 Model 980S, without fluid set
240093 Model 980S, with # 3 fluid set
240094 Model 980S, with #4 fluid set
240095 Model 980S, with #5 fluid set
240098 Model 980S, with #3 fluid set , flat bottom cup
8065A
INSTRUCTIONS–PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
Model 980
Non-Bleeder Style Turbine Spray Guns
50 psi (0.35 MPa, 3.5 bar) Maximum Inlet Fluid Pressure
100 psi (0.7 MPa, 7 bar) Maximum Inlet Air Pressure
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1998, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001

 
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shutdown 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spraying Techniques 13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts
Model 980S 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 980P 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 26. . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 26. . . . . . . . . . . . . . . . . . . . . . . . . .
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.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
Ground the equipment.
If there is any static sparking or you feel an electric shock while using this equipment, stop
spraying 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.
When flammable liquid is sprayed or used for flushing or cleaning the equipment, the turbine
must be placed at least 20 feet (6.1 m) away from areas where hazardous concentrations of
flammable vapors are likely to occur.
Use additional air hose if necessary to ensure that the turbine is operated in a clean, dry, well
ventilated area.
Never place the turbine inside a spray booth! Use this equipment outdoors or in extremely well
ventilated areas.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Electrically disconnect all equipment in the spray area.
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 operating or if fumes are present.
Do not operate a gasoline engine in the spray area.
WARNING 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 distributor.
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Check equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure of the lowest rated system component. See the
Technical Data on page 25.
Use fluids and solvents that are compatible with the equipment wetted parts. Refer to the
Technical Data on page 25 for wetted parts.
Do not use hoses to pull equipment.
Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 82C (180F) or below –40C (–40F).
Wear hearing protection when operating this equipment.
Do not lift pressurized equipment.
Comply with all applicable local, state, and national fire, electrical, and safety regulations.
Do not point the gun at anyone or at any part of the body.
Follow the Pressure Relief Procedure on page 12 if the fluid nozzle clogs and before cleaning,
checking or servicing the equipment.
Tighten all fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
WARNINGWARNING
INSTRUCTIONS
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.
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.
Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in the turbine spray system, which contains aluminum and/or
galvanized-coated parts. Such use could result in a serious chemical reaction, with the possibility
of explosion, which could cause death, serious injury, and/or substantial property damage.

 
Setup
Connect the Fluid and Air Supply
NOTES:
The HVLP Cart/Compressor provides the air supply
for the remote pressure pot.
Circled letters in Fig. 1 indicate hose line
connections.
NOTE: Model 980 HVLP spray guns differ from
traditional non-bleeder guns by the constant low
velocity airflow designed to prevent restriction and
plugging of aircap orifices.
1. Connect gun air supply hose (A) between turbine
air outlet (B) and gun air inlet (C). DO NOT use
wrench to tighten connections; hand tighten only.
See Fig. 1.
2. If using a spray gun cup (D):
Connect cup to gun fluid inlet (E).
If using accessory remote pressure pots (F):
Connect fluid supply hose (G) between remote
pressure pot fluid outlet (H) and gun fluid inlet (E).
Connect pressure pot air hose (J) between
pressure pot air regulator inlet (K) and the cart
compressor air outlet.
CAUTION
Model 980 non-bleeder style spray guns are for
use with Graco GTS Turbine Systems. Do not use
with previous models of Graco or Croix turbines.
Such use will dramatically shorten turbine life.
Install the Fluid Set
Complete spray guns are available with #3, #4, or #5
fluid sets. To install other fluid sets, perform the
following steps. See Fig. 2.
1. Remove air cap retaining ring (28). Discard
packaging (not shown). Remove detente plate and
spring (26).
2. Remove fluid regulator assembly (18, 19, 20) and
spring (21) from back of gun.
3. Fully insert needle assembly (14) into back of fluid
manifold (6).
4. Perform needle adjustment procedure steps 2 to 5
of Replacing and Adjusting the Needle on
page 16.
5. Perform needle packings adjustment procedure
steps 4 thru 8 of Adjusting the Needle Packings
on page 17.
Fig. 1 8068A
C
D
F
J
J
A
G
G
G
C
A
B
L
E
E
Z
Z
H
H
F
K
K
Y
XX
Y
Y
Z
X
21/2-gallon remote pressure pot2-quart remote pressure pot
cup setup for spray gun

 
Setup
Fig. 2 05289
28
26
6
18
19
20
21
14
29
Prepare the 980 Cup Gun for Pressure
Feed
1. Remove air pressure tube (31) from air stem (34).
See parts drawing on page 22.
2. Hold fluid inlet fitting (7) with wrench and remove
cup assembly (32).
3. Remove air stem (34) from gun body (1).
4. Apply medium strength threadlocker to set screw
(30) and assemble to gun body.
Prepare the Fluid
1. Always strain fluid before you spray. This includes
color, reducer, and hardeners.
2. Use slower-drying reducer or thinner to
compensate for faster drying time from warm
turbine air. Do not over reduce.
Paint Reduction —Automotive Type Finishes
Reduce and catalyze all paint to manufacturer’s
specifications. Compensate for faster turbine drying
time by using reducer one-step slower than
conventional air spray.
Paint Reduction —Industrial or Domestic
Coatings
Reduce and catalyze all paint to manufacturer’s
specifications. If no reductions are given, first
thoroughly mix fluid to be sprayed. Gradually mix in
reducer, testing fluid for correct spraying consistency.
Test consistency, remove stir stick from thinned paint.
Consistency is right when first drops from stir stick are
about one second apart.

 
Setup
Fill the Cup or Remote Pressure Pot
Spray Gun Cup
WARNING
The spray gun cup is pressurized by the gun’s air
supply. To reduce the risk of serious injury from
pressurized fluid or accidental spray from the gun,
always turn off the air supply to the gun before
removing the spray gun cup.
Fill cup 3/4 full to keep air pressure tube clean. Install
cover. Under-cup cover has latch (H) to secure it to
cup.
8066B
Fig. 3
H
Accessory Remote Pressure Pot
WARNING
The accessory remote pressure pots remain pres-
surized until pressure is manually relieved. To
reduce the risk of serious injury from pressurized
fluid or accidental spray from the gun, always
relieve pressure in the pressure pot before loosen-
ing or removing the cover.
1. Relieve remote pressure pot pressure as follows
(see Fig. 4):
a. Turn off air supply to pressure pot.
b. 21/2-gallon remote pressure pot:
Pull pressure relief valve ring (206c) until
pressure is completely relieved.
2-quart remote pressure pot:
Turn out pressure relief knob (113) one turn.
Wait until pressure is completely relieved
before removing cover. Close knob.
02882A
Fig. 4
206c
113
2 quart
8069A
21/2gallon
2. Remove pressure pot cover and fill. Secure cover.
NOTE: 2-quart remote pressure pot only:
Lightly coat cover threads with petroleum jelly.
CAUTION
If the 2-quart remote pressure pot is accidentally
tipped over or held at too great of an angle, fluid
may leak into the air regulator and cause damage.
Take precautions to avoid this. If fluid does get into
the regulator, clean immediately.
CAUTION
Do not tighten the pressure pot cover more than
hand-tight. Excessive tightening may damage the
cover gasket.

 
Setup
Prepare the Surface
To achieve proper adhesion, make sure the surface to
be sprayed is completely clean.
Turbine Operation
Sparking can be expected in the normal operation
of the turbine motor. Sparks can ignite fumes from
flammable liquid, dust particles, and other
flammable substances in the spray area. This can
cause serious injury and property damage. Be sure
to follow the precautions below:
When flammable liquid is sprayed or used for
flushing or cleaning equipment, the turbine must
be placed at least 20 feet (6.1 m) away from
areas where hazardous concentrations of
flammable vapors are likely to occur.
Use additional air hose if necessary to ensure
that the turbine is operated in a clean, dry, well
ventilated area.
Never use or place the turbine inside a spray
booth! Use this equipment outdoors or in
extremely well ventilated areas.
Avoid all ignition sources such as static
electricity from plastic drop cloths, open flames
such as pilot lights, hot objects such as
cigarettes, arcs from connecting or
disconnecting power cords, and arcs from
turning light switches on and off. Extinguish or
remove all sources of ignition.
WARNING
1. Turn turbine on a few minutes before spraying to
warm-up.
NOTE: Turn turbine off when not in use. Turbine
does not shut off automatically.
2. Be sure the turbine filter is clean before operating.
See Turbine Filter Maintenance on page 13.
HVLP Compressor/Cart Cold Weather
Operation
The HVLP compressor/cart uses a diaphragm
compressor. When new, the diaphragm may become
stiff in cold weather. If cold enough, the diaphragm will
not allow the compressor motor to start (the unit will
hum). If this occurs, follow these steps:
1. Turn turbine and compressor OFF.
2. Unplug turbine from power source.
3. Pinch and remove filter by hand. Clean or replace
if dirty.
4. Hand spin cooling fan on compressor for a few
revolutions.
5. Reinstall filter.
6. Plug in turbine.
7. Turn turbine and compressor ON. If necessary,
repeat procedure.
Adjust the Pattern Direction and Shape
Spray pattern direction and shape are determined by
3 different positions of the air cap. See Fig. 5. Rotate
air cap as needed to achieve desired pattern.
NOTE: Do not loosen air cap retaining ring to change
patterns unless air cap is set to its widest pattern. See
Fig. 10 on page 9.
vertical pattern
horizontal pattern
Fig. 5
round pattern
02847

 
Setup
Adjust the Spray Pattern
Select fluid set for fluid to be sprayed. If needed, see
page 10 to determine correct fluid set.
WARNING
Do not exceed the gun’s 50 psi (0.35 MPa,
3.5 bar) Maximum Inlet Fluid Pressure and
100 psi (0.7 MPa, 7 bar) Maximum Inlet Air
Pressure. Higher pressures can cause parts to
rupture and result in serious injury or property
damage.
Establish the Correct Fluid Flow
1. Turn fluid adjustment knob (21) counterclockwise
until no restriction of trigger movement is felt.
See Fig. 6.
8070A
Fig. 6
21
2. For remote pressure pot, hold gun parallel to floor
and adjust fluid pressure at 8 to 10 inch (203 to
254 mm) fluid stream. See Fig. 7.
For 2-quart remote pressure pot:
Set at 4 to 6 psi (0.28 to 0.42 bar).
For 21/2-gallon remote pressure pot:
Set at 8 to 10 psi (0.56 to 0.70 bar).
NOTE: Heavier fluids or longer fluid hoses require
greater pressures.
WARNING
Over-pressurizing the accessory remote pres-
sure pots can cause serious injury. To reduce
the risk, never exceed 50 psi (0.35 MPa,
3.5 bar) Maximum Inlet Fluid Pressure.
Fig. 7 8071A
8 to 10 in.
(203 to 254 mm)
3. If further gun fluid adjustment is needed, turn fluid
adjustment knob (21) clockwise to reduce volume
of fluid output. See Fig. 8.
21
Fig. 8 8072A
CAUTION
Restricting the trigger and fluid needle travel by
continuously spraying with the fluid adjustment
knob closed (turned clockwise), will cause
accelerated abrasive wear on the fluid needle and
wear on the trigger.
For best results, adjust fluid flow at the pressure
source or use a different size needle/nozzle/air cap
combination.

 
Setup
Establish the Correct Air Flow
4. Test spray pattern and atomization while holding
gun about 6 to 8 inches (150 to 200 mm) from test
piece.
5. Air Control Valve (M) on end of turbine hose
controls both atomizing air and pressure in spray
gun cup. See Fig. 9. Adjust air control valve as
needed.
Fig. 9
M
02850
NOTES:
Control over-spray mist by using only as much air
as necessary to spray fluid. Lighter fluids require
less air.
If atomization is still unacceptable, fluids may be
thinned further or a different fluid set may be
required. Refer to page 10 to determine fluid set or
page 5 to prepare fluid.
Adjust the Pattern Size
Change pattern size by turning air cap retaining ring in
for a wide pattern or out for a narrow pattern.
See Fig. 10.
wider
spray
pattern
turn air cap
retaining ring in
Fig. 10
normal
spray
pattern
narrower
spray
pattern
air cap flush
with fluid nozzle
turn air cap
retaining ring out
02851
1
2
Turning air cap in too far will retard atomization.
Turning air cap out too far stops fluid or causes flutter.
1
2

 
Setup
Contractor Fluid Set Chart
Use this chart to determine Fluid Set for specific contractor application. See Fig. 11.
Fluid Set Components
Fluid Set
P/N & Size
(A)
Air Cap
(B)
Nozzle
(C)
Needle
Type of
Fluid**
Fluid Usage
240112
#2 (0.8 mm)
240490 192911 192916 light
14 to 18 sec.
Fine finish work with stains, lacquers, water-
borne lacquers
240113*
#3 (1.3 mm)
240491 192912 192917 light–medium
18 to 22 sec.
Medium speed application with lacquers,
enamels, urethanes, and varnish
240114
#4 (1.8 mm)
240492 192913 192918 medium
20 to 26 sec.
Medium to high speed industrial finishes
240115
#5 (2.2 mm)
240493 192914 192919 heavy
22 to 26 sec.
Heavy output with lacquer and enamels, latex
and oil wall paints
240116
#6 (2.5 mm)
240494 192915 192920 heavy
26+sec.
Wax base stripper, sound deadeners, latex
paint, multi color
* Standard fluid set
** Fluid measured with a #4 Ford cup (Part No. M70702)
Automotive Fluid Set Chart
Use this chart to determine Fluid Set for specific automotive application. See Fig. 11.
Fluid Set Components
Fluid Set
P/N & Size
(A)
Air Cap
(B)
Nozzle
(C)
Needle
Fluid Usage
240117
0.5/0.5M
M70434
0.5 mm
M70446 M70453 Ultra fine finish with automotive touch-up,
spot jobs
240118
0.7/0.7M
M70437
0.7 mm
M70447 M70455 Fine finish work with all automotive finishes, color
matching, automotive base coat
240113*
#3 (1.3 mm)
240491 192912 192917 Normal output with enamels, urethanes, zinc
chromate, automotive primers
* Standard fluid set
Multi-hole air cap

 
Setup
Using Fluid Set Charts
Turbine Spray Gun includes a #3 fluid set, Part No.
240113. The size of air cap, fluid nozzle, and fluid
needle are marked on the parts.
Use fluid set charts on page 10 to order different size
fluid set or to find part number of individual
components of fluid set. Charts identify fluid sets used
in contractor and automotive applications.
Fluid sets include air cap (A), nozzle (B), and needle
assembly (D). See Fig. 11.
NOTE: To order other replacement parts for gun, see
parts drawing and list for gun model on page 22.
Fig. 11 02981
A
B
C
fluid set
D
Selecting Fluid Sets
Turbine spray gun fluid sets range in size to provide
different fluid flow rates. Selection charts on page 10
show recommended combinations based on fluid
viscosities, flow rates, and usage.
As a general guideline, use fluid nozzle that will give
required flow with needle fully triggered at lowest fluid
pressure.
For low flow rates or light viscosity fluid, select smaller
nozzle sizes.
For high flow rates or high viscosity fluid, select larger
nozzle sizes.
To eliminate mist, use air cap one size larger than fluid
nozzle. Use of smaller size air cap produces finer
finish, but can increase mist.
For very fine finish work (automotive, furniture, etc.),
order air cap two sizes smaller than needle and nozzle.
0.5M mm or 0.7M mm multi-hole air caps are
recommended for automotive finishes. See
Automotive User Chart on page 10.
For narrow fan pattern (wood finishing), order 0.5W
mm, 0.7W mm, or 1.0W mm narrow fan pattern air
cap. See chart below for part numbers.
Narrow Fan Pattern Air Caps
Air Cap P/N Size
M70435 0.5W mm
M70438 0.7W mm
M70441 1.0W mm

 
Shutdown
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The equipment stays pressurized until pressure is
manually relieved. To reduce the risk of a serious
injury from pressurized fluid, accidental spray from
the gun, or splashing fluid, 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 fluid nozzles
1. Turn off air supply to gun.
2. Turn off turbine sprayer.
WARNING
The turbine hose outlet may be hot. Carefully
check the hose end before removing the hose.
3. If using remote pressure pot:
Relieve pressure by following these steps:
a. Turn off air supply to pressure pot.
b. 21/2-gallon remote pressure pot:
Pull pressure relief valve ring (206c) until
pressure is completely relieved.
2-quart remote pressure pot:
Turn out pressure relief knob (113) about one
turn. Wait until pressure is completely relieved
before removing cover. Close knob. See
Fig. 12.
02882A
Fig. 12
206c
113
2 quart
8069A
21/2gallon
4. Elevate spray gun and pull trigger. This will allow
fluid in fluid hose to drain back into remote
pressure pot.
5. If using a spray gun cup, unlatch cup cover and
loosen or remove cup from cover to relieve cup
pressure.
6. Clean spray gun and cup as instructed on
page 14.

 
Spraying Techniques
General Spraying Techniques
Select proper fluid set. To determine correct fluid
set see charts on page 10.
When fluid is first applied, start with fluid nozzle and
air cap adjusted to “normal spray pattern”position.
Then adjust as needed. See Fig. 10 for pattern size
adjustment.
Keep gun perpendicular to surface and maintain
consistent distance of approximately 6 to 8 inches
(150 to 200 mm) from object being sprayed.
See Fig. 13.
Always have spray gun in motion before triggering.
Move spray gun across workpiece in straight,
smooth, stroke. Maintaining speed and distance.
Release trigger at end of stroke.
To obtain even finish, overlap previous strokes
by 50%.
Apply full, wet coat whenever possible.
Automotive Spraying Techniques
When blending spots, work from outside in.
Two 20-foot (6.1 m) hoses are recommended when
applying automotive finish coats. Additional hose
allows air to cool for better flow.
WRONG 0793
RIGHT 0793
6 to 8 in.
(150 to 200 mm)
Fig. 13
Maintenance
Turbine Filter Maintenance
Turbine systems are lifetime lubricated. The only
maintenance required is filter cleaning and
replacement.
Turbine main filter and pre-filter must be clean at all
times to provide sufficient air flow to cool motor and
atomize fluid. Check turbine pre-filter daily for
cleanliness. Check the main paper filter weekly,
minimum. Clean as necessary.
NOTE: To check filter, turn on turbine and place piece
of paper against pre-filter. If air intake holds paper in
place, filter is okay.
To clean main filter:
1. Turn off and unplug turbine.
2. Loosen four main filter screws, remove filter
retainer and pre-filter.
3. Remove main filter and clean by following one of
the following three methods:
Tap filter gently on flat surface, dirty side
down.
Direct maximum of 100 psi (0.7 MPa, 7 bar)
compressed air through filter panel in opposite
direction of arrows on side of filter.
Soak filter for 15 minutes in water and mild
detergent. Rinse filter until clean. Air dry filter;
do not use compressed air.
WARNING
To avoid damage to the turbine and possible electric
shock, never install a damp filter in the turbine.

 
Maintenance
Flushing the Spray Gun Using a Remote
Pressure Pot
WARNING
The spray gun cups and accessory remote pres-
sure pots remain pressurized until pressure is
manually relieved. To reduce the risk of serious
injury from pressurized fluid or accidental spray
from the gun, always relieve pressure in the cup or
pressure pot before you check or service any part
of the spray system; before you install, clean or
change fluid nozzles; before you loosen or remove
the accessory remote pressure pot cover; and
whenever you stop spraying.
NOTES:
Check for any fluid leakage from gun and fluid
hoses. Tighten fittings or replace equipment as
needed.
Flush gun before you change colors and when you
are finished spraying.
CAUTION
Clean all parts with a solvent compatible with the
fluid being sprayed and compatible with the spray
gun and cup or accessory remote pressure pot
wetted parts. See Technical Data on page 25.
1. Turn off air supply to gun.
2. Relieve pressure pot pressure as follows:
a. Turn off air supply to pressure pot.
b. 21/2-gallon remote pressure pot:
Pull pressure relief valve ring (206c) until
pressure is completely relieved.
2-quart remote pressure pot:
Turn out pressure relief knob (113) about one
turn. Wait until pressure is completely relieved
before removing cover. Close knob. See
Fig. 12.
3. Fill pressure pot with compatible solvent.
4. Flush spray gun, using compressor air only. Point
gun down into container and flush until solvent
runs clean.
5. Relieve pressure pot pressure, following steps 2.a
and b, above.
6. Disconnect air and fluid hoses from gun.
7. Clean and lubricate gun as instructed starting on
page 15.
Flushing the Spray Gun and Cup
1. Turn off air supply to gun.
2. Unlatch cup cover, and remove cup from cover.
3. Turn air cap to round pattern position. Turn air
control valve half open to reduce solvent mist. See
Fig. 14.
Fig. 14
air cap round
pattern position
02847
4. Fill empty cup with about 11/2inches (38 mm) of
compatible solvent, and reinstall cup. Be sure
cover is secured.
5. Turn on air to gun.
6. Point gun down into and ground against container
and flush until solvent runs clean. See Fig. 15.
8073B
Fig. 15
7. Turn off air to gun.
8. Disconnect air supply and remove cup from gun.
Clean and lubricate gun as instructed on pages 15
and 16.

 
Maintenance
Cleaning the Spray Gun
1. Clean gun and cup by hand with compatible
solvent or place them in gun washer with trigger
held open; cycle washer as necessary to clean
gun.
2. Remove air cap retaining ring (28), air cap (29),
spring (26), and detent plate (26). See Fig. 16.
3. Trigger gun while removing fluid nozzle (25) with
nozzle wrench (P), provided. See Fig. 16.
4. Remove gun fitting (19) from back of gun. Remove
needle for cleaning.
CAUTION
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 scratched.
8075A
Fig. 16
25
28
29
26
P
5. Soak air cap, detent plate and fluid nozzle in
solvent. At a minimum, clean air cap and fluid
nozzle daily. Use solvent and brush (R), provided.
See Fig. 17. Some applications require more
frequent cleaning. Keep all air cap holes clean.
CAUTION
Clean air cap horn holes with a non-metallic item to
avoid permanently damaging them.
Fig. 17 02856
R
6. With gun pointed down, clean front of gun, using
brush and solvent.
7. Trigger gun while installing fluid nozzle (25) with
nozzle wrench (P). See Fig. 16.
8. Install spring (26) into front of gun.
9. Install detent plate (26) into gun housing with open
sockets (S) facing up; align detent plate tab (T)
with notch in gun housing. See Fig. 18.
10. Install air cap (29), aligning air cap balls (U) with
detent plate sockets (S). See Fig. 18. Secure air
cap with air cap retaining ring (28).
NOTE: If installed correctly, air cap will snap into four
definite positions, with no loose rotation.
Fig. 18
U
S
T
26
29
S
02966
11. Lubricate gun after cleaning it as instructed on
page 16.

 
Service
Lubricating the Spray Gun
After cleaning or servicing gun, lubricate parts
indicated in Fig. 19 with silicone-free spray gun
lubricant or similar material.
All threaded areas (A)
Trigger screws (B)
Trigger axle (C)
Fluid needle assembly (D) —where indicated
Fig. 19
A A
C
B
D
02949
2 in. (50.8 mm)
DD
Fluid Needle Assembly
8076A
Replacing and Adjusting the Needle
The needle may need to be adjusted whenever you
change nozzle/needle sizes or to compensate for
wear.
To replace the needle:
1. Fig. 20. Remove fitting (22) and spring (23-not
shown) from back of gun.
2. Remove needle (14).
3. Insert new needle (14).
To adjust the needle:
4. Hold needle (14) with thumb and push upper
trigger pin (A) with index finger. Fig. 20. Trigger pin
must travel approximately 1/16 in. (2 mm) under
light spring pressure.
5. If there is not 1/16 in. of travel, loosen adjustment
nut (18) and turn drum (17) until trigger pin (A) has
about 1/16 in. (2 mm) free travel before needle
(14) starts to move.
6. Lock adjustment nut (18).
7. Make sure spring (23) is in place in fitting (22),
then install fitting. Hand-tighten fitting.
Fig. 20
18
1714
8077A
1/16 in.
(2 mm)
free travel
8669A
Less Travel
More Travel
22A
Model 980 shown

 
Service
Adjusting the Needle Packings
Needle packings require adjustment once a month
under normal use to ensure fluid does not leak back
through packings. Needle packings must also be
adjusted whenever the needle is removed or adjusted.
To adjust the needle packings:
1. Flush gun as instructed on page 14.
2. Remove air cap retaining ring (28), air cap (29),
spring (26), and detent plate (26). See Fig. 21.
3. Trigger gun while removing fluid nozzle (25) with
nozzle wrench (P), provided. Clean gun as
instructed on page 15.
CAUTION
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 scratched.
Fig. 21
25
28
29
26
P
8075A
24
4. Trigger gun while slightly turning packing nut (9)
clockwise with packing wrench (K), provided. See
Fig. 22. This compresses packings.
The packings need very little pressure to seal well.
If needle binds, packings are too tight; back
packing nut off 1/16 turn. Needle should then
move freely. If packings are over-tightened, they
may be damaged and may need to be replaced.
Fig. 22
K
DETAIL
8078B
8
9
5. Trigger gun while installing fluid nozzle (25) with
nozzle wrench (P). See Fig. 21.
6. Install spring (26) into front of gun.
7. Install detent plate (26) into gun housing with open
sockets (S) facing up; align detent plate tab (T)
with notch in gun housing. See Fig. 23.
8. Install air cap (29), aligning air cap balls (U) with
detent plate sockets (S). See Fig. 23. Secure air
cap with air cap retaining ring (28).
NOTE: If installed correctly, air cap will snap into 4
definite positions, with no loose rotation.
U
S
T
26
29
S
Fig. 23 02966

 
Service
Replacing the Air Valve
1. Loosen quick disconnect coupling (24) and remove
handle (23). See Fig. 24 and parts list.
Fig. 24 8231A
1
C
A
23
B
42
24
22
2. Holding gun body (1) inverted, remove handle tube
(22) from gun body.
3. Using a needle-nose pliers, grasp valve assembly
(42) by installation/removal tab (A).
4. Clean valve seating shoulder (B) in gun body with
a brush and solvent.
5. Using installation/removal tab, insert valve
assembly (42) into gun body (1) with the hook of
valve (C) oriented towards the front of the gun.
Make sure valve assembly (42) is fully seated in
the locking flats in the gun body.
6. Hand tighten handle tube (22) into gun body (1) to
capture valve assembly (42).
CAUTION
The use of tools to tighten handle tube will result in
severe damage to valve assembly.
7. Install handle (23) and quick disconnect coupling
(24). Torque quick disconnect coupling to 60 to 80
in-lb (7 to 9 Nm).
CAUTION
Do not assemble and torque quick disconnect cou-
pling to handle tube without installing handle. Se-
vere damage to valve assembly will result.

 
Notes

 
Troubleshooting
Spray Finish Problems
PROBLEM CAUSE SOLUTION
Orange peel finish —Paint
surface not smooth
Paint droplets too large Maintain proper spraying distance.
See page 13.
Keep the turbine air filters clean to
allow full air flow. See page 13.
Do not use an air hose that is too
long to provide sufficient
atomization pressure.
If droplets are still too large, reduce
the fluid or use a smaller air cap.
Paint droplets drying too fast to
properly flow out of gun
Keep the object being sprayed out of
direct sunlight. When spraying in
warmer temperatures, use a slower
evaporating solvent or a retarder.
Cold weather spraying Keep the fluid and the object being
sprayed as close to room temperature
as possible. When sprayed on a cold
surface, most paints will become too
thick to flow properly.
Blushing —Clear coatings
appear milky
Moisture condensation is trapped in
the lacquer when spraying in hot,
humid conditions
Allow the turbine to warm up a few
minutes before spraying.
Store the lacquer off concrete
floors, at room temperature.
Apply lighter coats and allow for
proper drying time.
Use a slower evaporating solvent
or retarder.
Do not spray in windy conditions.
Fish eyes —Small pools on
painted surface that will not
fill
Silicone contamination from lubricants,
grease, polish, or waxes on the
surface being sprayed
Clean all parts with a cleaning solvent;
use a solvent rag and a clean rag to
wipe with. Replace rags as needed. If
the problem persists, use a fish eye
eliminator.
Runs and sags Applying too much paint per pass for
the drying conditions
Move the gun faster or decrease
the fluid flow.
Maintain proper spraying distance.
See page 13.
Reduce the amount of thinner or
use a faster drying thinner.
Solvent pops or bubbles Sprayed surface drying before solvent
gas can be released
Apply fluid in lighter coats to allow
for proper evaporation.
Use the recommended thinners.
Follow the solutions, above, for
Orange peel finish — Paint droplets
too large.