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PERIODIC MAINTENANCE
At least once a day check and make sure
head retaining ring (Figure 5) is tight. A
loose ring will cause an air leak and
pattern distortion.
LUBRICATION POINTS
The following parts should be lubricated
when assembling the spray gun:
Ref. # Description
Instructions
6
Fluid Head
SSL-10 gun lube
(2 drops on fluid
head threads)
13
Needle Spring Coat ends lightly with
pure petroleum jelly
(petroleum based
grease)
10/46 O-ring
SSL-10 gun lube
19
O-ring
SSL-10 gun lube
26
O-ring
SSL-10 gun lube
30
Piston Assy.
Light coating of pure
petroleum jelly (petro-
leum based grease) on
shaft of piston
34
Rear Plug
SSL-10 Gun Lube
(on threads for knob)
43
O-rings
SSL-10 gun lube
50
Skeleton
Light coating of pure
petroleum jelly (petro-
leum based grease) on
inside diameter where
piston (30) travels.
REPLACEMENT OF PARTS
All repairs should be made on a clean flat
surface. Do not clamp parts in a vise. All
parts need only be hand tight except where
specified in the repair procedures. If using
pliers or similar tool to free parts, make
sure the jaws are padded.
Replacement Procedures
Note
Always remove the gun from the
work site for service or repair.
Flush gun thoroughly, relieve
pressure, and disconnect fluid
and air hoses.
Air Cap (1)
1.
When installing the air cap assembly,
(1, Figure 10), tighten hand tight, do
not overtighten. Apply two drops of
SSL-10 gun lube onto the fluid head
(6) threads before installing the air
cap. (Lubrication facilitates removal
of air cap after use.)
Fluid Head (6) and Needle (12)
1.
Remove fluid control knob (35, Fig-
ure 9) by turning counterclockwise.
Remove needle spring (13).
2.
Pull trigger to expose needle (12).
Remove needle with needle nose
pliers.
3.
Remove air cap assembly (1) from
fluid head (6).
4.
Loosen head retaining ring (15) by
turning clockwise (when facing front
of spray gun). Note the ring remains
attached to the skeleton.
If the air cap or head retaining
ring become "locked" on due
to dried paint, soak the affected
area in solvent long enough to
soften the paint. Do not use
any tools to remove, damage
may occur.
5.
Grasp fluid head (6) firmly and pull
straight off from gun body. If there is
any difficulty removing, apply a slight
wiggling motion to free the fluid end
from the fluid tube o-ring (10).
Note
The fluid head (6) and needle (12)
should be replaced as a set. If
replacing the fluid head and
needle, be sure to also replace
the packing (8) to prevent fluid
leakage.
6.
Remove packing spring (7).
7.
Remove fluid tube o-ring (10) from
fluid tube assembly and install a new
o-ring. See following note.
Note
The o-ring (10) is made of BUNA-N
and will naturally swell from sol-
vent and paint. This provides a
tight seal in the fluid head. When
removing the fluid head, always
replace the o-ring. Trying to re-
use a swollen o-ring will make
reassembly difficult, and could
damage the o-ring, causing a
fluid leak. Swollen o-rings can
be removed, allowed to dry and
"shrink" to their normal size, and
then reused. DO NOT reuse if
there are any signs of damage.
8.
Remove baffle seal (11) and replace
with a new seal.
9.
Install the new or cleaned fluid head
and needle as follows:
a. Apply a small amount of SSL-10
gun lube to the front tip of the
needle (12). Install needle (12)
SB-2-226-B
partially into gun body through
rear opening. Leave about 1" (25
mm) of needle exposed out the rear
of the gun.
b. Apply a small amount of gun
lube to o-ring (10).
c. Apply two drops of gun lube to
fluid head threads. (Lubrication
facilitates removal of part after use.)
d. Slide new packing/spring (7)
over end of needle.
e. Place the fluid head against the
gun body, ensuring that the fluid
head lines up with the fluid tube open-
ing, Figure 6. Firmly push the fluid
head over the fluid tube o-ring and
against the head retaining ring.
10. Turn the head retaining ring (15)
counterclockwise to draw the fluid
head onto the body. Hand tighten
the retaining ring until the fluid
head is drawn firmly against the
gun body.
11. Push the needle in completely.
Install the needle spring (13) and
screw in the fluid control knob (35).
Turn knob completely in clockwise,
then back out 1-1/2 to 2 turns for
full fluid flow.
12. Apply SSL-10 gun lube to the air
cap threads. Screw the air cap as-
sembly (1) onto the fluid head (6).
Tighten hand tight, do not over-
tighten.
Figure 6
Head Retaining
Ring
Fluid Head
Fluid
Fluid
Tube
Tube
Opening
Page 5
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