Page 4 SB-2-199-F
Chart 2
Fluid Tip and Needle
If this No. If This No. Matched Fluid Tip Size
is on Needle, is on Tip, Tip & Needle (I.D.)
Order Order Assembly In. mm.
JGA-402-FF AV-2120-FF JGA-4045-FF .055 1.4
JGA-402-FX AV-2120-FX JGA-4045-FX .042 1.1
Note: Do not use AV-1 copper gasket with
this spray gun.
JGA-4035 Packing Replacement
Instructions
1. Remove adjusting knob and needle
spring from gun.
2. Partially withdraw needle from gun
body.
3. Loosen packing nut and remove.
4. Remove old packing.
5. Assemble packing nut to needle
6. Assemble packing in order shown to
needle.
7. Insert needle all the way into gun body
seating in tip.
8. Install needle spring and adjusting
knob.
9. Thread packing nut into gun body.
10. Tighten packing nut in equal incre-
ments – no more than
1/6 turn at a time.
11. After each adjustment, pull needle
open and observe needle closure.
12. If needle snaps shut, continue adjust-
ing nut until there is evidence of needle
bind or slow closing.
13. Back off packing nut 1/2 turn to the
point where needle snaps shut. Pack-
ing nut must remain tight enough to
prevent loosening by hand.
14. Pull needle several times to verify
needle snaps shut and check packing
nut for looseness.
Packing
(3 pieces)
Packing
Nut
Needle
Gun Body
GTI-33 Baffle Seal Replacement
(For guns with #2000 cap only.)
1. Remove Fluid Tip (5).
2. Remove baffle (6).
3. Remove Seal (7) from baffle.
NOTE
The seal is designed to be a tight
fit on the baffle. The seal should
be able to be removed using your
fingers. If you are unable to remove
the seal using your fingers, insert
a small screwdriver between the
outer lip and the back of the
baffle and pry the seal off.
4. Assemble seal to baffle with angled
side up as shown below. NOTE: The
seal should be a tight fit on the baffle. If
it is a loose fit on the baffle, assure that
it is assembled with the angled side up.
5. Install baffle on gun.
6. Install fluid tip (5) and tighten to
15-20 ft-lbs.
ANGLED SIDE
THICK SIDE
SEAL
BAFFLE
Pry here
if neces-
sary.
PARTS REPLACEMENT
SPRAY GUN LUBRICATION
Daily, apply a drop of SSL-10* spray gun
lube at trigger bearing stud (28) and the
stem of air valve (20) where it enters
air valve assembly. The shank of fluid
needle (11) where it enters packing nut (9)
should also be oiled. Fluid needle pack-
ing (8) should be lubricated periodically.
Make sure baffle (6) and retaining ring
(3) 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. Fluid needle spring (14)
and air valve spring (19) should be coated
with a very light grease, making sure that
any excess grease will not clog the air
passages. For best results, lubricate the
points indicated, daily.
* Not for air tools or high RPM equip-
ment.
A. Trigger Points
B. Packing
C. Adjusting Knobs
D. Baffle Threads
E. Air Valve Cartridge
A
C
D
B
E
FLUID INLET GASKET (32) REPLACE-
MENT INSTUCTIONS
1. Remove fluid inlet adapter (34) with
appropriate wrench.
2. Clean Loctite from gun body inlet
threads and seal area.
3. Place gasket (32) squarely onto the
fluid inlet adapter and push it down
until it is flat against the shoulder.
4. Use medium strength thread sealant
(i.e. Devcon 2242 blue, or equal) on
threads before installing fluid inlet
adapter.
5. Torque fluid inlet adapter to 20-25
ft. lbs. and tighten locknut.
(32 pages)
(34 pages)
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