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Spray Gun Lubrication - DeVilbiss JGA-510 Service Manual

Suction/pressure feed spray gun
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SPRAY GUN LUBRICATION

Daily, apply a drop of •SSL-10 spray gun
lube at trigger bearing stud (20) and the
stem of the air valve (12) where it enters
the air valve assembly (16). The shank of
the fluid needle (32) where it enters the
packing nut (18) should also be oiled.
The fluid needle packing (17) should be
lubricated periodically. Make sure the
baffle (5) and retaining ring (1) threads are
clean and free of foreign matter. Before
assembling retaining ring to baffle, clean
the threads thoroughly, then add two
drops of SSL-10 spray gun lube to
threads. The fluid needle spring (29) and
air valve spring (11) should be coated
with a very light grease, making sure that
any excess grease will not clog the air pas-
sages. For best results, lubricate the points
indicated, daily.
•A Material Safety Data Sheet is available
from DeVilbiss upon request.
A.
Trigger Points
B.
Packing
C.
Adjusting
Valves
D.
Baffle
Threads
E.
Air Valve
D
B
E
Cartridge
PARTS REPLACEMENT - FLUID INLET
GASKET (6) REPLACEMENT INSTRUC-
TIONS
1.
Remove fluid inlet adapter (8) with ap-
propriate wrench.
2.
Clean Loctite from gun body inlet threads
and seal area.
3.
Place gasket (6) squarely onto the fluid
inlet adapter and push it down until it
is flat against the shoulder.
4.
Place a couple of drops of medium
strength thread sealant (i.e. Loctite 242
blue, or equal) on threads before install-
ing fluid inlet adapter.
5.
Torque fluid inlet adapter to 20-25 ft. lbs.
and tighten locknut.
Figure 1 Baffle
Maximum air pressure required
to assure compliance of 10 psi
Max. Cap Pressure - this reading
must be taken at the spray gun
handle inlet fitting.
50
57
Air cap number located on face
of cap - cap number must cor-
respond with baffle number to
assure 10 psi cap pressure.
SB-2-248-M (9/2015)
Chart 1
FLUID TIP AND NEEDLE
Needle
Tip
AV-2125-D
JGA-402-DEX
JGA-402-E
AV-2125-DE
JGA-402-FX
AV-2125-DFX
Note: Do not use AV-1 copper
gasket with this spray gun.
Chart 2
AIR CAP & BAFFLE COMBINATION
No. Stamped on Part
Air Cap
Part No.
Baffle
57
57
A
C
JGHV-101-57 Air Cap
Performance Charts
Graph 1
Gun Inlet Pressure (PSI)
Graph 2
Gun Inlet Pressure (PSI)
DISASSEMBLY INSTRUCTIONS -
NEW BAFFLE ASSEMBLY
The baffle design incorporates a tight,
press fit with the fluid tip, assuring a
Tip Size
positive air seal. With this design, the
(I.D.)
baffle may pull away from the gun body
In. mm
when the tip is removed and stay locked
onto the fluid tip. If this occurs, follow the
.086 2.2
instructions below.
.070 1.8
.042 1.1
1.
2.
Set
Ref. No. 2
Ref. No. 5
Air Cap
Baffle
JGHV-101-57 JGHV-457-57
Figure 2
3.
4.
5.
Figure 3
3 / 8
Note
A bench vise should be used for
convenience and to avoid damage
to the spray gun.
Secure the spray gun in a bench vise
with padded jaws, or use a rag to
avoid scratching the gun body.
Using a 1/2" socket, loosen the fluid
tip three (3) turns only, which will
leave about a 1/16" gap between the
baffle gasket and gun body. See
Figure 2. Do not loosen the fluid tip
more than three (3) turns, as
damage may occur.
Loosen fluid tip
3 turns only.
Fluid Tip
Baffle
1/16" gap
Baffle
(approx.)
Gasket
Bench
Vise
Place a 1" socket (12 pt.) over the fluid
tip so that it rests on the top surface
of the baffle. See Figure 3.
Press downward on the socket with
sufficient force to free the baffle from
the tip. See Figure 3.
The fluid tip and baffle can now be
removed normally from the gun.
Press Down
1" Socket
(12 pt.)
EN

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