Binks Cub SLG User manual

Binks Cub SLG
GRAVITY-FEED HVLP GUN
Binks Cub SLG gravity-feed HVLP gun is
the finest touch-up and specialty coatings
gun available today. This gun has been
ergonomically designed to give operators
superb control and comfort over a range of
uses.You feel its excellent balance and
heft as soon as you pick it up. The
gun body is made of the finest forged
aluminum and machined to exacting tol-
erances. Overall quality is reflected in the
gun’s lustrous and durable anodized finish.
The Cub SLG is a very efficient spray
gun, transferring 65 percent or more of
fluid to the subject. It fully meets oper-
ating pressures and material transfer
requirements of California’s South
Coast Air Quality Management District
regulations as a high volume, low
pressure spray gun. High pressure, low
volume air flow is converted to high
volume, low pressure flows within the
gun body. Special air and fluid nozzles
enable the gun to atomize fluid at low
velocities, creating a soft spray effect
for superior transfer efficiencies.
The Cub SLG gun is especially favored
in the automotive touch-up and detail-
ing industries and is well-suited to other
specialty finishing and small area appli-
cations. Several options in cup size and
fluid nozzle sizes make the gun adapt-
able to a variety of uses. See the Parts
List on page 3 and Fluid Nozzle Table
on page 6 for these options.
This Part Sheet contains an exploded
drawing and detailed parts list to enable
a complete understanding of the gun’s
construction. A basic overview of gun
operation, cleaning, care and mainte-
nance, and troubleshooting of common
problems is also provided.
Please be sure to also read the notes
regarding air pressure and volatile
materials safety on page 2.
ILLUSTRATION KEY
1. Air Nozzle
2. Retaining Ring
3. Gravity Feed Cup
4. Fan Control
5. Fluid Control Knob
6. Gun Body
7. Air Inlet 1/4 NPS(m)
1
3
2
4
5
6
7
Replaces
Part Sheet
2735R
Part
Sheet
2735R-1
PACKAGE CONTENTS
Please note your Binks Cub SLG gravity-feed gun package was shipped
with the following contents. If anything in the following list is missing,
call 1-800-992-4657 for a prompt shipment to you of the missing item(s).
DESCRIPTION PART NO. QTY.
Cub SLG Gravity-Feed Spray Gun 1
4 oz. Cup Assembly ..........................54-4458 1
Gun Box ............................................4-1727 1
Cub SLG Part Sheet ..........................2735R-1 1
4 oz. Cup Assembly Part Sheet........2719 1
Gunners Mate ..................................54-3871 1
Small GunBrush ................................54-4133 1
Gun Brush ........................................82-221 1
NOTE
IMPORTANT REGULATORY NOTE regarding
the use of this product appears on page 8.

Your Cub SLG Gravity-Feed HVLP
gun is exceptionally rugged in con-
struction and is built to stand up under
hard, continuous use. However, like
any other precision instrument, your
gun’s most efficient operation depends
on a knowledge of its construction,
operation and maintenance. Properly
handled and cared for, it will produce
beautiful, uniform finishes long after
other spray guns are worn out.
CONNECTING TO AIR HOSE
Air should be supplied by a suitable
length of 1/4" diameter air hose fit-
ted with a 1/4" NPS(f) connector at
the gun end. For hose lengths over
50', use 5/16" diameter hose.
CONTROLLING FLUID FLOW
Fluid flows from the cup into the
fluid inlet by gravity with assistance
from siphon action. Air pressure for
atomization is regulated at the extrac-
tor (see illustration). The flow of
fluid is adjusted by the fluid control
knob on the gun, paint viscosity, air
pressure, and nozzle size. Nozzles
with larger apertures give higher flow
rates. You can adjust fluid flow by
turning the fluid control knob. Turn
clockwise to restrict the needle open-
ing, counterclockwise to enlarge it.
BINKS OIL AND WATER
EXTRACTOR
Achieving a fine spray finish without
the use of a good oil and water
extractor is almost impossible. A
Binks regulator/extractor serves a
double purpose. It eliminates blister-
ing and spotting by keeping air free
of oil and water, and it gives precise
air pressure control.
We recommend the DeVilbiss HFRL-
509 Oil and Water Extractor/Regulator
for use with the Cub SLG gun.
CONTROLLING FAN SPRAY
Fan spray is controlled by the fan
control knob. Turning this knob
clockwise until it is closed produces a
small, circular spray pattern. Opening
it counter-clockwise widens the pat-
tern to a fan shape.You can adjust the
fan pattern to any angle by changing
the position of the air nozzle by loos-
ening the retaining ring, rotating the
air nozzle to the desired position, and
re-tightening the retaining ring.
CLEANING YOUR GUN AND
GRAVITY FEED CUP
(See WARNING Regarding Solvent
Safety, Column 1.)
1. Shut off the air supply.
2. Trigger the gun to relieve pressure.
3. Pour solvent into the cup.
4. Trigger the gun to allow solvent
to flow through. Note that this is
done with air pressure off so
solvent will not vaporize.
5. Clean inside the fluid inlet and
fluid nozzle using the small
gun brush.
6. Clean the outside of the gun
using the gun brush.
7. Repeat any step above until the
gun is clean.
8. Blow air through the gun until it
is dry.
9. Option: Disconnect the gun from
the air hose and remove the air
and fluid nozzles if they need sep-
arate cleaning. Remove the fluid
needle and wipe clean. Unscrew
the cup and rinse with solvent.
2
HOW TO SET UP and OPERATE YOUR Binks CUB SLG GRAVITY-FEED HVLP SPRAY GUN
CAUTION
Never use anything metal to clean
the air nozzle or fluid nozzle. These
parts are precisely machined and any
damage to them will cause faulty
spray patterns.
!
WARNING
REGARDING AIR PRESSURE SAFETY
Shut off air pressure before connecting
or disconnecting air hose or removing
any components from the gun.
Servicing the gun while pressurized
could result in damage to components
or bodily injury.
!
WARNING
REGARDING PAINTS, SOLVENTS AND
OTHER COATINGS SAFETY
Do not use open containers for stor-
age or disposal of paint, other coat-
ings, cloth, or paper used in
preparation and application. Many
paints and coatings contain volatile
chemicals that are a cause of pollu-
tion and are a health and fire hazard.
Always wear appropriate clothing,
including gloves, eye protection, and
a respirator when using the gun.
!
Oil and Water
Extractor

3
ITEM PART
NO. NO. DESCRIPTION QTY.
154-4482 TRIGGER STUD.................................. 1
254-4483 TRIGGER SCREW .............................. 1
354-4462 TRIGGER............................................ 1
471-28† D.M. NIPPLE
1/8 NPT(m) 1/4 NPS(m) ...................... 1
554-4458* 4 OZ. CUP ASSEMBLY ...................... 1
6■CUP OUTLET .................................. 1
7■CUP NUT ........................................ 1
8■4 OZ. GRAVITY-FEED CUP.............. 1
954-4459◆■ LID ASSEMBLY ................................ 1
10 ■LID CAP .......................................... 1
11 ■CUP LID .......................................... 1
12 54-4492■HANDLE ASSEMBLY ........................ 1
13 ■SET SCREW Stainless Steel................ 1
14 54-4489 FAN CONTROL ASSEMBLY .............. 1
15 ■▲ RETAINING RING ............................ 1
16 ■FAN CONTROL HOUSING .............. 1
17 ■▲ O-RING Split Teflon .......................... 1
18 ■FAN CONTROL KNOB .................... 1
19 54-4128 FLUID CONTROL KNOB .................... 1
20 54-4495▲SPRING Stainless Steel ........................ 1
21 54-4494 NEEDLE ASSEMBLY .......................... 1
22 ■FLUID NEEDLE ................................ 1
23 ■NEEDLE LOCKNUT.......................... 1
24 ■NEEDLE CAP .................................. 1
ITEM PART
NO. NO. DESCRIPTION QTY.
25 54-4127† REAR HOUSING ................................ 1
26 54-4131▲U-CUP SEAL ...................................... 2
27 54-4126▲WASHER............................................ 1
28 54-3520▲SPRING Yellow .................................. 1
29 54-4119▲AIR VALVE ASSEMBLY...................... 1
30 ■SPINDLE .......................................... 1
31 ■RETAINING RING ............................ 1
32 ■WASHER.......................................... 1
33 ■AIR VALVE SEAL ............................ 1
34 54-4125▲SPINDLE CAP .................................... 1
35 54-4134▲SEAL RETAINER ................................ 1
36 55-847▲PACKING NUT .................................. 1
37 55-846▲PACKING .......................................... 1
38 54-4497 GRAVITY-FEED FLUID INLET ............ 1
39 54-4469▲FLUID INLET SEAL ............................ 1
40 20-5740▲O-RING Teflon.................................... 1
41 54-4124† HEAD INSERT.................................... 1
42 **† FLUID NOZZLE .................................. 1
43 46-9900 AIR NOZZLE 2S ................................ 1
44 54-4123 RETAINING RING .............................. 1
45 54-4133 SMALL GUN BRUSH (Page 4) ............ 1
46 82-221 GUN BRUSH (Page 4) ........................ 1
47 54-4130▼WRENCH (Page 4) (Optional) .............. 1
54-3871 GUNNERS MATE (Not Shown) ............ 1
PARTS LIST
When ordering, please specify Part No.
TORQUING INFORMATION
Item Description Torque Spec.
4D.M. Nipple 48"/lbs.
14 Fan Control Assembly 48"/lbs.
25 Rear Housing 72"/lbs.
41 Head Insert 144"/lbs.
42 Fluid Nozzle 84"/lbs.
4
15
36
39
8
7
6
5
9
11
28
33 32 31
29
30 27 26
25
22
21
13
23 24 20 19
10
16 17 18
14
41
42
43
44 40
1
2
3
35
38 37
26
34
12
* 8 oz. cup assembly (Part No. 81-381) available as an option.
** Choose from chart on page 6.
■Available as part of its assembly.
▲Available in Spare Parts Kit 54-4478.
◆ Available in Kit 54-4539 (set of 3).
†Torquing information. (See chart at right).
▼Not furnished. Please order separately.
(Pre-assembled in handle)

CLEANING YOUR GUN
UNDER PRESSURE
It has been customary in the indus-
try to clean paint guns by spraying
solvent through them under air
pressure. This cleaning method is
less effective than the steps
described on page 2. In addition,
you may violate local air quality
regulations. Spraying solvent under
pressure atomizes it and may
release volatile organic compounds
(VOCs) into the air.
If you wish to clean the gun using
this method, we recommend one of
the following alternatives:
1. Spray solvent through the gun
into a closed system. An enclosed
unit or spray gun cleaning station
condenses and captures solvent
vapors, preventing the escape of
VOCs.
2. Place the spray gun in a washer-
type cleaner. The washer must
totally enclose the gun, cup, noz-
zles and other parts during wash-
ing, rinsing and draining cycles.
The washer must be able to flush
solvent through the gun without
releasing VOCs.
HOW TO MAINTAIN
YOUR GUN
All part names and item numbers in
parentheses refer to the exploded
drawing and Parts List on page 3.
TO REPLACE THE AIR VALVE
ASSEMBLY (29) OR THE
REAR U-CUP SEAL (26)
1. Remove the fluid control knob
(19), stainless steel spring (20)
and needle assembly (21).
2. Unscrew the rear housing (25)
using a 5/16" hex wrench. Inside
the rear housing is the washer
(27) and the rear u-cup seal (26).
3. Remove the washer. The rear
u-cup seal can be pushed out
from behind if you need to
replace it.
4. Remove the yellow spring (28).
5. Holding the spindle cap (34) to
avoid losing it, pull out the air
valve assembly.
6. Replace and reassemble in
reverse order.
• Lightly lubricate new seals
with petroleum jelly.
• Note the orientation of the rear
u-cup seal: the open side should
face the front of the gun.
• Take care when starting the rear
housing into the gun. Make sure
the air valve assembly is lined
up with the rear u-cup seal.
Otherwise, the end of the air
valve spindle (30) may damage
the seal.
TO REPLACE THE FRONT
U-CUP SEAL (26)
1. Remove the air valve assembly
as described above.
2. Remove the cup assembly (5),
retaining ring (44), air nozzle
(43), fluid nozzle (42), head
insert (41), o-ring (40) and fluid
inlet assembly (36-39) from the
front of the gun.
3. Unscrew the trigger screw (2)
from the trigger stud (1) and
remove the trigger (3).
4. Unscrew the seal retainer (35).
5. Push out the front u-cup seal and
replace it.
6. Reassemble in reverse order.
• Lightly lubricate new seals
with petroleum jelly.
• Note the orientation of the front
u-cup seal—the open side
should face the back of the gun.
TO REPLACE THE PACKING (37)
IN THE FLUID INLET (38)
1. Remove the fluid control knob
(19), stainless steel spring (20),
and needle assembly (21).
2. Unscrew the packing nut (36).
3. Remove the packing using a stiff wire
hook or small sheet metal screw.
4. Replace the packing and reassemble
in reverse order.
TO REPLACE THE O-RING
(17) IN THE FAN CONTROL
ASSEMBLY (14)
1. Remove the fan control
assembly.
2. Pry off the retaining ring (15).
3. Unscrew the fan control housing
(16).
4. Remove and replace the o-ring.
5. Re-assemble.
TO ADJUST THE FLUID
NEEDLE (22)
The effective length of the fluid needle
can be adjusted using the needle lock-
nut (23) and needle cap (24).
1. Remove the fluid control knob
(19) and the stainless steel
spring (20).
2. Use the wrench (47) to loosen
the needle cap.
3. Pull the fluid needle assembly
(21) out approximately 1-1/4".
4
CLEANING YOUR Binks CUB SLG GRAVITY-FEED HVLP SPRAY GUN
NOTE
Take care not to lose the
spindle cap (34).
46 45 47

4. Screw the needle locknut out for
more trigger movement, in for
less trigger movement.
5. Adjust the fluid needle so the
trigger moves the air valve
assembly (29) 1/16" before the
fluid needle assembly moves.
6. Place the needle locknut in the
hex-shaped hole of the rear hous-
ing (25). Be sure the locknut is
properly positioned.
7. Tighten the needle cap with
wrench.
8. Replace stainless steel spring
(20) and fluid control knob (19).
GENERAL INSTRUCTIONS
FOR AIR-SUPPLIED PAINT
SPRAYING
To reduce overspray and obtain
maximum efficiency, always spray
with the lowest possible air pres-
sure that produces an acceptable
spray pattern. Excessive atomizing
air pressure can increase overspray,
reduce transfer efficiency, and with
some materials, result in poor finish
quality from dry spray. Atomizing
air pressures should not exceed
10 psi. See the tables on page 6
and Important Regulatory Note on
page 8.
Generally use 30-35 psi air at the gun
inlet. Unusually heavy or difficult to
atomize materials may require up to
50 psi inlet air. Refer to air pressure
recommendations on page 6.
SPRAY TECHNIQUE
To get a good finish you must handle
the gun properly. Hold the gun per-
pendicular to the surface you are
painting. Each paint stroke should be
made parallel to the plane of the sur-
face being painted. Start the stroke
before you trigger the gun and release
the trigger before you end the stroke.
This will give you accurate control of
both gun and material and will prevent
excessive build-up of material at the
stroke ends.
The distance between the gun and
surface should be 6"-10" depending
on the material and the atomizing
pressure. The material deposited
should always be even and wet. Lap
each stroke about half of the preced-
ing stroke to obtain a uniform finish.
IF YOU HAVE TROUBLE
WITH GUN OPERATION
OR RESULTING FINISH
FAULTY SPRAY PATTERN
A faulty spray pattern is often
caused by dried materials around
the fluid nozzle tip or in the air
nozzle left behind by improper
cleaning. Soak these parts in thin-
ner to soften the material and
remove it with a brush or cloth.
INTERMITTENT SPRAY
Fluttering spray is caused by one of
the following problems:
1. Air leaking into the fluid pas-
sages due to any of the follow-
ing: The packing nut (36) may
be loose. The packing (37) may
be worn and need replacement.
The fluid nozzle (42) may be
loose. The cup assembly (5)
may be loose in the gun. The
fluid inlet seal (39) may be
worn.
2. Insufficient fluid available.
SPITTING
Spitting is caused by anything that
restricts the movement of the fluid
needle assembly (21). The probable
causes include:
1. The packing nut (36) is too tight.
2. The needle assembly (21) is bent.
You may be able to straighten it.
3. Dried material has built up on the
needle or in the fluid nozzle (42).
4. Lumps or impurities in the fluid.
Regulator pressures are based on 25
feet of 1/4" hose in good condition
without quick disconnects or other
restrictive fittings. Gun inlet pres-
sures are measured at the gun air
inlet with the gun triggered. Use the
air nozzle test gauge accessory
54-4150 to confirm the atomizing/
regulator pressure relationship for
your actual air supply setup. These
recommendations are for typical or
average fluids, and are intended to
serve as a starting point. Adjust as
necessary for your specific applica-
tion. Regulator pressures for 5/16"
hose are 3 to 5 PSI lower.
CLEANING and MAINTAINING YOUR Binks CUB SLG GRAVITY-FEED HVLP SPRAY GUN
5
CAUTION
Never use anything metal to clean
the air nozzle or fluid nozzle. These
parts are precisely machined, and
any damage to them will cause
faulty spray patterns.
!
CAUTION
Do not over-tighten as this may
damage the threads and make
future adjustments difficult
.
!
6"-10"
Start
Stroke
Trigger
Gun
End
Stroke
Release
Trigger
SPRAY TECHNIQUE
WARNING
Always wear appropriate gloves,
eye protection and a respirator
when using your gun. Atomized
materials may cause bodily injury.
!

FLUID NOZZLE OPTIONS
Material Fluid Nozzle No. Part No.
Very Light/Reduced Flow 20T (.020" dia. opening) 45-9900
25T (.025" dia. opening) 45-9901
30T (.030" dia. opening) 45-9902
Light/Medium: less than 15 to 20 seconds in a
ZAHN 2 Cup, e.g., stains, varnishes, thin lacquers, 40T (.040" dia. opening) 45-9905
automotive refinishing materials
Medium: 20 to 30 seconds in a ZAHN 2 Cup,
e.g., general industrial coatings 55T (.055" dia. opening) 45-9908
Heavy: greater than 30 seconds in a ZAHN 2 Cup,
e.g., low VOCs coatings
AIR PRESSURES AND FLOWS
Gun Inlet Pressure Nozzle Atomizing Nozzle Atomizing
(PSI) Air Flow (SCFM) Pressure (PSI)
20 2S Nozzle 6.0 3
30 2S Nozzle 7.5 5
45 2S Nozzle 10.0 9
50 2S Nozzle 11.0 10
Gun inlet pressure is measured at the gun inlet fitting with the gun triggered.
AIR PRESSURE RECOMMENDATIONS
Type of Material Atomizing PSI Gun Inlet PSI Regulator PSI
Primer/Surfaces 3-4 20-26 27-33
Light Stains/Inks 4-5 26-30 33-38
Acrylic Enamels 6-7 35-40 44-47
Lacquers 7-8 40-42 47-55
Low VOCs, Urethanes 8-10 42-50 55-59
Regulator pressures are based on 25' of 1/4" hose in good condition without quick disconnects or
other restrictive fittings. Gun inlet pressures are measured at the gun air inlet with the gun triggered.
Use the Air Nozzle Test Gauge Accessory 54-4150 to confirm the atomizing/regulator pressure for your
actual air supply set-up. These recommendations are typical for average fluids, and are intended to
serve as a starting point. Adjust as necessary for your specific application. Regulator pressures for 5/16"
hose are 3 to 5 PSI lower.
6
FLUID NOZZLE OPTIONS, AIR PRESSURE RECOMMENDATIONS
FOR YOUR Binks Cub SL HVLP SPRAY GUN

NOTES
7

IMPORTANT REGULATORY NOTE
8
Sales and Service Through a Nationwide Network of Industrial Distributors.
Customer Service in USA / 1-800-992-4657
Technical Support in USA / 1-888-992-4657
195 Internationale Blvd.
Glendale Heights, IL 60139 Part Sheet 2735R-1 Printed in USA 8/02, All Rights Reserved
2735R-1 Revisions: (P2) Changed recommended Oil and Water Extractor to DeVilbiss
HFRL-509; (P3) Removed footnote reference to 3 oz. cup, deleted footnote regarding 2S
and 2P air nozzle note on page 6, added Gunners mate to Parts List; (P6) Combined
medium and Heavy Fluid Nozzle Options, removed footnote regarding 2S and 2P air
nozzles, removed references to 2P nozzles.
Regulations in some areas prohibit the operation of HVLP spray guns above 10 psi nozzle atomizing
pressure. Users subject to this regulation should not exceed 50 psi gun inlet pressure (see the air pres-
sure chart for various fluid materials on page 6). Some agencies require users to have a nozzle test
gauge available on site to verify gun operating pressures. We recommend that you use Nozzle Test
Gauge (Part No. 54-4150) shown below for accurate nozzle operating pressures.
TEST GAUGE