EN
77-2655-R4.1 (1/2015)
7 / 16
MAINTENANCE
LUBRICATION
Monthly: Remove piston assembly (18) and lubricate the
air cylinder chamber and needle valve spring with a
coating of Gunners Mate (51). Also, lubricate side port
control assembly (7) with oil.
REMOVAL OF PISTON
To remove the piston, first unscrew the ratchet housing
assembly (28), remove 2 springs (26 & 27) and pull out
the material needle (22) and attached parts (23, 24, & 25).
Remove the piston by applying a few pounds of air pres-
sure to the cylinder air inlet. This air pressure will cause
the piston to pop out.
TO REPLACE NEEDLE SEAL AND GLAND
ADAPTER IN FLUID INLET
Remove ratchet housing assembly (28), springs (26 &
27) and assemble material needle (22) and attached parts
(23, 24, & 25). Proceed to the front of the gun and
remove air cap assembly (1) and fluid nozzle (2). Then,
using wrench (48), unscrew head insert (4) and remove
fluid inlet (37 or 38). Unscrew packing nut (43) and
remove spring (42) and seal backup (41). Using a
no. 10 x 1-1/4" coarse thread wood screw (Binks part no.
20-6536) or small sheet metal screw, remove the needle
seal (40) and gland adapter (39). Replace gland adapter
(39) and needle seal (40). Reinsert seal backup (41),
spring (42) and screw on packing nut (43) a couple of
turns so it fits loosely by hand. Reassemble fluid inlet
(37 or 38) to gun body (5) with head insert (4). Tighten
head insert using wrench (48). Reassemble fluid nozzle (2)
and air cap assembly (1). Reinsert material needle (22) and
attached parts (23, 24 & 25), springs (26 & 27) and screw
on ratchet housing assembly (28). Finally, tighten packing
nut (43) until it bottoms out on fluid inlet (37 or 38).
CLEANING
In certain states it is now against the law to spray sol-
vents containing Volatile Organic Compounds (VOCs)
into the atmosphere when cleaning a spray gun.
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 container. This sys-
tem must totally enclose the spray gun, cups, nozzles,
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 stor-
age or disposal of solvent, or solvent-containing cloth
or paper, used for surface preparation and clean-up
may not be used. Containers shall be non-absorbent.
To clean the gun, flush the fluid lines with solvent and
blow air through the air lines to make sure all the air
passages are dry.
TROUBLESHOOTING
FAULTY SPRAY
A faulty spray may be caused by improper cleaning,
dried materials around the fluid nozzle tip or in the air
cap. Soak these parts in thinners that will soften the
dried material and remove with a brush or cloth.
If either the air cap assembly (1) or fluid nozzle (2) are
damaged, these parts must be replaced before perfect
spray can be obtained.
INTERMITTENT SPRAY
If the spray flutters, it is caused by one of the following
faults:
1. Insufficient material available. Check supply and
replenish if necessary.
2. Loose fluid nozzle (2). Tighten, but without using
undue force.
3. Leakage at gland adapter (39) and needle seal (40).
Tighten packing nut (43) if loose, and replace gland
adapter and needle seal if necessary.
4. Fluid connection insufficiently tight or dirt on cone
faces of connection. Correct as necessary.
5. Leaking cylinder air and/or inadequate pressure.
CAUTION
Never use lubricants containing silicone since these
lubricants can cause finish defects. Binks Gunners Mate
(51) is recommended.
!
CAUTION
Never completely submerge the gun in solvent as this will
dissolve the lubricating oil and dry out the seals.
!
CAUTION
Never use metal instruments to clean the air or fluid noz-
zles. These parts are carefully machined and any damage
to them will cause faulty spray.
!
WARNING
Excessive air pressure applied to the piston during
removal may cause the piston to exit at a high velocity,
resulting in personal injury. When removing the piston,
aim back of gun in a safe direction and do not use
excessive pressure.
!
