Binks M1-G HVLP Troubleshooting guide

Binks Model M1-G HVLP
GRAVITY FEED SPRAY GUN
The Binks M1-G HVLP Gravity Feed
Gun is a high quality sprayer that
produces fine finish for compliant and
non-compliant areas. A superbly bal-
anced forged aluminum body provides
you with extra comfort and control.
All components are machined and
finished to exacting tolerances and
only the best materials are used,
ensuring years of peak efficiency.
Simple to operate, the M1-G HVLP
provides exceptional finishes with
complex coatings such as primers,
base coats, clear coats, single stage
and waterborne compliant materials.
Additionally, specially designed air
and fluid nozzles enable the M1-G
HVLP to operate at more than 65%
transfer efficiency, in compliance
with air quality regulations as a high
volume low pressure air spray gun.
The Binks M1-G HVLP Gravity
Feed Spray Gun includes a metal
paint cup with drip-proof cover.
The air nozzle is available in
aluminum or E-Z Clean models.
To obtain optimum performance
from your new M1-G HVLP Gravity
Feed Spray Gun, read all instructions
carefully.
PACKAGE CONTENTS
Please note your Binks M1-G HVLP
Gravity Feed Spray Gun package
was shipped with the following con-
tents. If anything in the following
list is missing, call 1-800-992-4657
for a prompt shipment to you of the
missing item.
Illustration Key
1. Air Nozzle Assembly
2. Gravity Feed Cup
3. Gun Body
4. Side Port Control
5. Fluid Control Knob
6. Air Connection 1/4" NPS(m)
2
1
3
4
5
6
PART
NO. DESCRIPTION QTY.
M1-G HVLP GRAVITY FEED SPRAY GUN ........ 1
2650 M1-G PART SHEET............................................ 1
54-4720 1 LITER GRAVITY FEED CUP ASSEMBLY ........ 1
SBBI-4-043 1 LITER CUP ASSEMBLY PART SHEET.............. 1
54-3871 GUNNERS MATE .............................................. 1
82-469 GUN BRUSH (ROUND)...................................... 1
192219 PLASTIC COATED GUN HOOK ........................ 1
OMX-88 CLEANING BRUSH (FLAT) ................................ 1
Replaces
Part Sheet
2650R-2
Part
Sheet
2650R-3
NOTE
IMPORTANT REGULATORY NOTE regarding
the use of this product appears on page 8.

OPERATION and MAINTENANCE INSTRUCTIONS for M1-G HVLP SPRAY GUN
SPRAY GUN CLEANING INSTRUCTIONS
In certain states, spraying solvents which contain Volatile
Organic Compounds (VOC) into the atmosphere when
cleaning a spray gun is now prohibited.
In order to comply with these new air quality laws Binks
recommends one of the following two methods to clean
your spray finishing equipment:
1. Spray solvent through the gun into a closed system.
An enclosed unit or spray gun cleaning station con-
denses solvent vapors back into liquid form which
prevents escape of VOC’s into the atmosphere.
2. Place spray gun in a washer type cleaner. This
system must totally enclose the spray gun, cups, noz-
zles and other parts during washing, rinsing and
draining cycles. This type of unit must be able to
flush solvent through the gun without releasing any
VOC vapors into the atmosphere.
Additionally, open containers for storage or disposal
of solvent or solvent-containing cloth or paper used for
surface preparation and clean-up may not be used.
Containers shall be nonabsorbent.
CLEANING GUN AND GRAVITY FEED CUP
Remove the cup cover and drain unused material from
cup. Carefully rinse cup with solvent. Place clean solvent
into the cup and spray this through the gun until it is clean.
Remove and clean the cup if necessary. Blow air through
the gun to dry it. (Refer to Service Bulletin SBBI-4-043 for
cleaning instructions when using cup liners.)
Your new M1-G HVLP Spray Gun is exceptionally rugged
in construction and is built to stand up under hard, continu-
ous use. However, like any other fine precision instrument,
its most efficient operation depends on a knowledge of its
construction, operation and maintenance. Properly handled
and cared for, it will produce beautiful, uniform finishing
results long after other spray guns have worn out.
IMPORTANT: Before removing any components from the
spray gun, shut off air pressure and drain material from the
paint cup.
SETUP FOR SPRAYING
CONNECTING GUN TO AIR HOSE
Air should be supplied by a suitable length of 5/16" diameter
air hose fitted with a 1/4 NPS(f) connection at gun end. For
hose lengths over 50', use 3/8" hose.
CONNECTING GRAVITY FEED CUP TO GUN
(Figure 1) Screw the cup into the spray gun fluid inlet. Fig. 1
OPERATING THE M1-G HVLP SPRAY GUN
CONTROLLING THE MATERIAL FLOW
Correct fluid nozzle size should be selected for proper
material flow rate. The material valve control knob (19)
may be used to restrict the material needle valve opening
and reduce the material flow as necessary.
CONTROLLING THE FAN SPRAY
The fan spray is controlled by means of the side port
control assembly (9). Turning this control clockwise until
it is closed will give a round spray. Turning it counter-
clockwise will widen the spray into a fan shape. The fan
spray can be turned anywhere through 360° by position-
ing the air cap (2) relative to the gun. To affect this,
loosen retainer ring, position nozzle, then tighten retainer
ring.
TROUBLE SHOOTING
FAULTY SPRAY
A faulty spray is often caused by improper cleaning,
resulting is dried materials around the material nozzle tip
or in the air nozzle. Soak these parts in thinners to soften
the dried material and remove with brush or cloth.
If either the air cap (2) or fluid nozzle (3) are damaged,
these parts must be replaced before perfect spray can be
obtained.
INTERMITTENT SPRAY
Fluttering spray is caused by either insufficient material
in the gravity feed cup or a clogged fluid passage. If the
fluid passage is clogged, drain material from the paint
cup and remove the cup and fluid nozzle. Clean the fluid
passage with solvent and reassemble.
Gravity Feed Cup
Air
Extractor
2
NOTE
All numbers in parentheses ( ) refer to item numbers in
Assembly Drawing on Page 4.
CAUTION
Never use metal instruments to clean the air or material
nozzles. These parts are carefully machined and any damage
to them will cause faulty spray.
!

MAINTENANCE
TO REPLACE AIR VALVE AND SPINDLE ASSEMBLY
Remove material control knob (19), spring (16) and
needle assembly (18). Unscrew housing (17) and remove
spindle assembly (15) with springs (14 & 16), seal
retainers (13) and o-rings (12). Lubricate new o-rings
with Gunner’s Mate. Assemble components using
material needle. Place this assembly along with housing
(17) into gun body and screw into position.
Remove material needle and tighten housing.
TO REPLACE CARTRIDGE ASSEMBLY
Remove material valve control knob (19), spring (16) and
remove needle assembly (18). Pull back trigger (21) and
remove seal cartridge assembly (22). Remove and discard
plastic packing pin in new cartridge assembly. Pull back
trigger and insert new seal cartridge assembly.
Reassemble needle assembly (18), spring (16) and
material valve control knob (19).
ADJUSTMENT OF MATERIAL NEEDLE
The needle assembly is adjustable for length by means of
the needle, needle cap and needle locknut. These should
be adjusted so that when the trigger assembly is in con-
tact with the spindle assembly (15), a movement of the
spindle assembly of 1/16" is required before the material
needle moves.
Under no circumstances should the material needle valve
open before the air valve.
FLUID NOZZLES
Standard Fluid Nozzles
FLUID NEEDLE
54-4382
54-4547▲
(See Note)★
APPLICABLE FLUID
MATERIAL FLUID NOZZLE NO. AIR NOZZLES** NEEDLE
LIGHT/MEDIUM 94F (.055" Dia.) 1.4 mm• 92P•, 93P■, 94P•, 54-4390•
95P•, 95AP✷•,
MEDIUM 97F (.070" Dia.) 1.7 mm•
97AP✷•
54-4391•
HEAVY 906F (.100" Dia.) 2.5 mm• 905P 54-4394•
909F (.111" Dia.) 2.8 mm• 54-4395•
FEATHERING NOZZLES
For applications requiring more gradual Material Valve opening;
metering control of fluid flow is obtained with Gun Trigger.
** The 97P or 907P Air Nozzles may be used, but will cause a
significant reduction in fluid flow rate.
Optimum setup for fine automotive spray is 94 x 93P.
✷´´BLUE MAX´´ fine finish nozzles. (Retaining ring attached).
•Optional.
▲ Recommended Fluid and Air Nozzle combinations for clear
coat application.
3
NOTE
★
Use stainless steel fluid needle (54-4382) for these nozzles.
Optional nylon-tipped stainless steel fluid needle (54-4381)
is also available. Binks needles AB and ABSS (54-3609) and
(54-3941) may be used, but require readjustment of the
needle cap and locknut position. Use 54-4547 needle with
92GS, 94GS and 96GS fluid nozzles.
NOTE
This chart applies to M1-G Gravity Feed Guns only.
MATERIAL
LIGHT: 15 to 20 seconds in a
ZAHN 2 Cup, e.g., stains, varnishes, thin
lacquers, automotive refinishing materials.
MEDIUM: 20 to 60 seconds in a ZAHN 2
Cup, e.g., general industrial coatings
HEAVY: greater than 60 seconds in a
Zahn 2 Cup.
FLUID NOZZLE NO.
92 (.046" Dia.) 1.2 mm
92GS (.046" Dia.) 1.2 mm▲
93 (.051" Dia.) 1.3 mm•
94 (.055" Dia.) 1.4 mm
94GS (.055" Dia.) 1.4 mm▲
96GS (.063" Dia.) 1.6 mm▲
97 (.070" Dia.) 1.7 mm
903 (.079" Dia.) 2.0 mm•
905 (.089" Dia.) 2.3 mm
906 (.100" Dia.) 2.5 mm•
909 (.111" Dia.) 2.8 mm•
AIR NOZZLE**
92P•, 93P, 94P•,
95P•, 95AP✷•,
97AP✷•, 90P,
96G▲
905P

ASSEMBLY DRAWING FOR THE M1-G GRAVITY FEED SPRAY GUN
4
1
2
3
45
8
6
9
7
22
23
12
13
14
11
28
30
31
26
15
10
16
13
12
17
19
16
18
24
21
20
27
29
REFER TO SERVICE BULLETIN SBBI-4-043 FOR:
• Warnings and cautions for
cup assembly 54-4720.
• Assembly instructions for
the liner (not shown).
• Cleaning instructions for the
cup assembly when used with or without the liner.
32
25

ITEM PART
NO. NO. DESCRIPTION QTY.
154-3531 RETAINING RING ........................................................ 1
2★AIR CAP ...................................................................... 1
3★FLUID NOZZLE ............................................................ 1
454-4368 HEAD INSERT .............................................................. 1
554-4369-5▲❍ HEAD INSERT SEAL RING .......................................... 1
654-4361▼M1-G HANDLE ASSEMBLY
754-4359 TRIGGER STUD............................................................ 1
882-126 TRIGGER SCREW ........................................................ 1
954-4364●SIDE PORT CONTROL ASSEMBLY .............................. 1
10 54-3511▲RETAINING RING ........................................................ 1
11 20-6160▲O-RING ........................................................................ 1
12 20-4615-5▲❍ O-RING ........................................................................ 2
13 54-3515 SEAL RETAINER .......................................................... 2
14 54-3520▲SPRING (Yellow) .......................................................... 1
15 54-3512▲SPINDLE ASSEMBLY.................................................... 1
16 54-3518▲SPRING (Blue) .............................................................. 2
17 54-3541 HOUSING .................................................................... 1
18 ★NEEDLE ASSEMBLY .................................................... 1
19 54-3606 MATERIAL VALVE CONTROL KNOB .......................... 1
20 54-768 AIR CONNECTION
54-4439† AIR CONNECTION (1/4 BSP) ........................................ 1
21 54-4360 TRIGGER...................................................................... 1
22 54-4370▲SEAL CARTRIDGE ASSEMBLY .................................... 1
23 54-3513 VALVE SPINDLE CAP .................................................. 1
24 54-4720 1 LITER GRAVITY FEED CUP ASSEMBLY.................... 1
25 GFC-404❏DISPOSABLE LID ASSEMBLY
(Quantity 2 supplied / 54-4720)
26 KGP-13▲✚ CUP GASKET (Blue)...................................................... 1
27 54-3918 WRENCH (Optional) .................................................... 1
28 82-469 GUN BRUSH (Round) .................................................. 1
29 KGP-5✹FILTER..........................................................................
30 192219 PLASTIC COATED GUN HOOK .................................. 1
31 54-3871◆GUNNER’S MATE ........................................................ 1
32 OMX-88 CLEANING BRUSH (Flat) .............................................. 1
33 OMX-70 ✖DISPOSABLE LINER (Not Shown)
(Refer to Service Bulletin SBBI-4-043)
PARTS LIST
(When ordering, please specify PART NO.)
★ See Air and Fluid Nozzle Chart on Page 3.
●Optional: Side Port Control Assembly 54-4365 (QCSP).
✹ Available in 54-4716 Filter Kit (quantity of 5) only.
† European Gun Assemblies only.
▲ Available in Spare Parts Kit 54-4367.
Not furnished. Please order separately.
▼ Item NOT available separately.
◆ Available from Industrial Finishing distributors only.
❍ Available only as a Quantity Pak.
❏ Available in 54-4715 Disposable Lid Kit (quantity of 2) only.
✚ Available in 54-4717 Cup Gasket (Blue) Kit (quantity of 5) only.
✖ Available in OMX-70-K48 Disposable Liner Kit (quantity of 48) only.
5

AIR NOZZLES
AIR PRESSURE RECOMMENDATIONS
AIR NOZZLE RECOMMENDATIONS:
The 93P and 905P Air Nozzles are most suitable
for conventional materials. Use of very low fluid
delivery rates with these Nozzles will produce a
narrower than normal fan pattern.
Use the 97P and 907P Air Nozzles for heavy bodied,
high solids materials and low fluid flow rates
with conventional materials. High flow rates
with light bodied materials may result in some
minor “smoking” or material build-up on the
face of these nozzles.
USE OF THE 95AS OR 97AS SIPHON NOZZLES IS
NOT RECOMMENDED WITH THE M1-G GRAVITY
FEED GUN.
ATOMIZING
TYPE OF MATERIAL PSI
Light Stains, Inks 3-4
Primer/surfaces 5-6
Acrylic Enamels 7-8
Lacquers 7-8
Low VOC, Urethanes 8-10
6
HVLP AIR NOZZLE 96G
NOZZLE NOZZLE REGULATOR
ATOMIZING ATOMIZING GUN INLET PRESSURE
AIR FLOW (SCFM) PRESSURE (PSI) PRESSURE (PSI) (PSI)
7.5 3.0 23.0 35.0
14.0 5.0 29.0 42.0
15.5 7.0 33.0 47.0
17.5 9.0 39.0 55.0
19.0 10.0 43.0 60.0
HVLP AIR NOZZLE 94P
NOZZLE NOZZLE GUN INLET
AIR FLOW ATOMIZING PRESSURE
(SCFM) (PSI) (PSI)
7.0 3.0 14.0
9.0 5.0
21.0
11.0 7.0 27.0
12.0 9.0 30.0
13.0 10.0 33.0
LVLP AIR NOZZLE 93P
NOZZLE NOZZLE REGULATOR
ATOMIZING ATOMIZING GUN INLET PRESSURE
AIR FLOW (SCFM) PRESSURE (PSI) PRESSURE (PSI) (PSI)
5.5 3.0 8.0 10.0
7.0 5.0
11.5 14.0
8.0 7.0 14.5 18.0
9.5 9.0 17.0 22.5
10.0 10.0 18.0 24.0
LVLP AIR NOZZLES 92P
NOZZLE NOZZLE REGULATOR
ATOMIZING ATOMIZING GUN INLET PRESSURE
AIR FLOW (SCFM) PRESSURE (PSI) PRESSURE (PSI) (PSI)
4.5 3.0 6.0 9.0
6.0 5.0
8.5 10.0
6.8 7.0 11.5 14.0
7.5 9.0 13.5 18.0
8.0 10.0 15.0 19.0
92P and 93P are for general industrial and automotive finish applications.
HVLP AIR NOZZLES 95P, 97P, 95AP, 97AP, 905P, 907P
NOZZLE NOZZLE REGULATOR
ATOMIZING ATOMIZING GUN INLET PRESSURE
AIR FLOW (SCFM) PRESSURE (PSI) PRESSURE (PSI) (PSI)
11.0 3.0 20.0 27.0
15.7 5.0 30.0 40.0
17.5 7.0 38.0 50.0
19.6 9.0 45.0 58.0
22.5 10.0 50.0 64.0
NOTE
Regulator pressures are based on 25' of 5/16"
Hose in good condition without Quick-
Disconnects or other restrictive fittings. Use
the Air Nozzle Test Gauge accessory to confirm
the atomizing/regulator pressure relationship
for your actual air supply set-up. These
recommendations are for “typical” or
“average” materials, and are intended to
serve as a starting point. Adjust as necessary
for your specific application.

GENERAL SPRAY INSTRUCTIONS
To reduce overspray and obtain maximum efficiency,
always spray with the lowest possible fluid/air pressure
that produces an acceptable spray pattern.
Excessive atomizing air pressures can increase overspray,
reduce transfer efficiency, and with some materials, result
in poor finish quality from dry spray. Atomizing air pres-
sures should not exceed 10 psi. See table on page 6, dia-
gram on this page and Regulatory Note on page 8.
Generally use 30 - 35 psi at gun inlet (see below).
Unusually heavy, difficult to atomize materials may
require up to 50 psi air at gun head.
SPRAY TECHNIQUE
The first requirement for a good resultant finish is the
proper handling of the gun. The gun should be held per-
pendicular to the surface being covered and moved paral-
lel with it. The stroke should be started before the trigger
is pulled, and the trigger should be released before the
stroke is ended. This gives accurate control of the gun
and material.
The distance between gun and surface should be 6 to 10
inches depending on material and atomizing pressure.
The material deposited should always be even and wet.
Lap each stroke over the preceding stroke to obtain a
uniform finish.
Binks Oil and Water Extractor is important
Achieving a fine spray finish without the use of a good oil and water extractor is
virtually impossible.
A Binks Regulator/Extractor serves a double purpose. It eliminates blistering and
spotting by keeping air free of oil and water and it gives precise air pressure control
at the gun. See page 2 regarding installation of extractors.
Atomizing pressure must be set to allow for the drop in air pressure between the
regulator and the spray gun.
Approx.
5 1/2 psi
at Nozzle
Approx.
9 psi
at Nozzle
Only 34 psi
at Gun Inlet
25 feet of
1/4" I.D. hose
causes a drop
of 26 psi
between the
air supply
and the gun.
48 psi
at Gun Inlet
25 feet of 5/16" I.D.
hose causes a drop
of 12 psi between
the air supply and
the gun. For this
reason we recommend
the use of 5/16" hose.
1/4" 5/16"
Cross section view showing comparison of
inside hose diameters (actual size). 60 lbs
regulated pressure.
HOSE RECOMMENDATION
With 60 psi applied at air supply:
RECOMMENDED
NOT RECOMMENDED
6 to 12 inches
Coating should be even
and wet when spraying
7

IMPORTANT REGULATORY NOTE
Some Regulatory Agencies prohibit the operation of HVLP spray guns above 10 psi nozzle atomizing
pressure. Users subject to this type of regulation should not exceed the gun inlet pressure indicated on
the air cap. See General Spray Instructions and Air Pressure Recommendations, page 7. It is recom-
mended that the nozzle test gauge (see below) be used to confirm actual nozzle operating pressure.
It may also be a requirement of some regulatory agencies that users have this gauge nozzle available on
site to verify that the gun is being operated within the limits of applicable rules.
AIR NOZZLE TEST GAUGE ASSEMBLY
54-3935 for 95P, 97P, 95AP, and 97AP Nozzles.
54-3908◆for 900 Series Nozzles.
54-4345◆for 90P Air Nozzle.
54-4356 for 93P Air Nozzle.
54-3902◆for 92P Air Nozzle.
54-4066◆for 94P Air Nozzle.
54-4566 for 96G Air Nozzle.
ACCESSORIES
(When ordering, please specify PART NO.)
Part No. Description
54-4350 Gun Stand
54-4352 Gun Bracket
GFG-6 Gun Bracket
192219 Plastic Coated Gun Hook
81-82 Strainer
145 Mesh—typical for Lacquers
81-83 Strainer
100 Mesh—typical for Metal Flake
81-84 Strainer
80 Mesh—typical for Primers
54-4352
Gun Bracket
(Optional)
54-4350
Gun Stand
(Optional)
8
Part Sheet 2650R-3 Printed in USA 9/02, All Rights Reserved
2650R-3 Revisions: (P1) Updated PACKAGE CONTENTS; (P2) updated CLEANING GUN
AND GRAVITY FEED CUP copy; (P4) Updated exploded view; (P5) Updated PARTS LIST;
(P8) Updated ACCESSORIES.
59-299
Gauge◆
◆Available from Industrial
Distributors only.
GFG-6
Gun Bracket
(Optional)
192219
Plastic Coated Gun Hook
(Supplied with outfit)
Industrial Finishing
Binks has authorized distributors throughout the world. For technical
assistance or the distributor nearest you, call Toll-Free 1-888-992-4657
(U.S.A. and Canada only). For local calls, see listing below.
U.S./Canada Sales & Customer Service Office:
195 Internationale Blvd., Glendale Heights, IL 60139
Telephone: [phone] Toll-Free Fax: [phone]
Automotive Refinishing
Binks has authorized distributors throughout the world. For equipment,
parts and service, check the Yellow Pages under “Automotive Body
Shop Equipment and Supplies.” For technical assistance, call Toll-Free
1-800-445-3988 (U.S.A. only). For local calls, see listing below.
U.S. Customer Service Office:
1724 Indian Wood Circle, Maumee, OH 43537
Telephone: [phone] Toll-Free Fax: [phone]
Binks Worldwide Sales and Service Listing - www.binks.com