3
OPERATION AND MAINTENANCE FOR MACH 1 HVLP SPRAY GUN
Your new MACH 1 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 mainte-
nance. Properly handled and cared for, it
will produce beautiful, uniform finishing
results long after other spray guns have
worn out.
SET-UP 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"
diameter hose.
Connecting Gun To Fluid Hose
Fluid should be supplied by a suitable
length of 3/8" diameter fluid hose fitted
with a 3/8" NPS(f) connection at gun
end. 1/4" diameter hose is recommended
for use with low viscosity fluids. (Fluid
hoses of different composition are avail-
able for special fluids.)
SPRAY GUN CLEANING
INSTRUCTIONS
In certain states it is now against the law
to spray solvents containing Volatile
Organic Compounds (VOC)’s into the
atmosphere when cleaning a spray gun.
In order to comply with these air quality
laws Binks recommends one of the fol-
lowing 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 condenses
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, nozzles
and other parts during washing, rins-
ing 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-con-
taining cloth or paper used for surface
preparation and clean-up may not be
used. All containers shall be nonab-
sorbent.
Pointers On Cleaning
When used with 1 quart cup, relieve
pressure in the cup. Then unscrew,
empty and carefully rinse cup out with
thinners. Place clean thinners in the cup
and spray this through the gun until it is
clean. Blow air through gun to dry it.
When Used With Pressure
Container
Shut off air supply to container and
release the pressure on the container.
Hold a piece of cloth wadded in the
hand over the gun nozzle (3) and pull
the trigger. The air will back up through
the fluid nozzle and force the fluid out
of the hose into the container. Empty
container. Put enough thinner into the
container to wash hose and gun thor-
oughly and spray this through the gun
until it is clean. Then blow out the fluid
hose to dry it and remove all traces of
fluid by attaching it to the air line.
When used with Paint
Circulating System
Shut off fluid supply and remove fluid
hose from gun. Clean as gun used with
siphon cup or pressure container or con-
nect quick release on paint line solvent
line. To ensure a clean air supply to your
spray gun, use Binks oil and water
extractor. See your Binks distributor for
the correct model.
GENERAL MAINTENANCE
To Replace Air Valve and
Spindle Assembly
Remove fluid control knob (23), spring
(18) and needle assembly (20). Unscrew
housing (19) and remove spindle assem-
bly (17) with springs (16 & 18), seal
retainers (15) and o-rings (14).
Lubricate new o-rings with Gunners
Mate. Assemble components using fluid
needle. Place this assembly along with
housing (19) into gun body and screw
into position. Remove fluid needle and
tighten housing.
To Replace Needle Seal and
Gland Adapter in Fluid Inlet
Remove fluid control knob (23) and
spring (18) and pull out needle assembly
(20). Unscrew packing nut (31) and
remove spring (30) and seal backup
(29). Using a no. 8 x 1-1/4 coarse thread
wood screw (Binks part no. 20-6536) or
a small sheet metal screw, remove the
needle seal (28) and gland adapter (27).
Replace gland adapter (27) and needle
seal (28). Re-insert seal backup (29),
spring (30) and screw on packing nut
(31) a couple of turns so it fits loosely
by hand. Reassemble needle assembly
(20), spring (18) and fluid control knob
(23). Finally, tighten packing nut (31)
until it bottoms out on fluid inlet (26).
CAUTION
All parts on a spray gun should be
screwed in hand tight at first; this
will avoid the possibility of cross
threading the parts. If the parts
cannot be turned by hand easily,
make sure you have the correct
parts, unscrew, realign, and try
again. NEVER use undue force in
mating parts.
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