DeVilbiss KK-4987-2 Service Instruction
SI-2-25-28-R1 (7/2018)1 / 4www.carlisleft.com
Service Instruction
SI-2-25-28-G
Replaces SI-2-25-28-F
KK-4987-2 Gun Repair Kit
(for JGA, JGV, JGHV, JGP, JGPV, LMG,
MSA, MSV, & PGA GUNS)
1. Remove adjusting knob, needle spring, spring pad,
and needle from gun.
2. Loosen packing nut and remove.
3. Remove old packing. See disassembly illustration
below.
4. Assemble packing nut to needle.
5. Assemble packing in order shown to needle.
6. Insert needle all the way into gun body seating in tip.
7. Install needle spring, spring pad, and adjusting knob.
8. Thread packing nut into gun body.
9. Tighten packin
g nut in equal increments - no more
than 1/6 turn at a time.
10. After each adjustment, pull needle open and observe
needle closure.
11. If needle snaps shut, continue adjusting nut until
there is evidence of needle bind or slow closing.
12. Back off packing nut 1/12 turn to the point where
needle snaps shut. Packing nut must remain tight
enough to prevent loosening by hand.
13. Pull needle several times to ve
rify needle snaps shut
and check packing nut for looseness.
NOTE 1:
JGV-463 Packing Replacement Instructions
2 piece packing covered by U.S. Patent No. 5,209,501.
Other patents pending.
PACKING REPLACEMENT
INSTRUCTIONS
PACKING REPLACEMENT INSTRUCTIONS
EN
SERVICE INSTRUCTION
KK-4987-2 GUN REPAIR KIT
(FOR JGA, JGV, JGHV, JGP, JGPV, LMG, MSA, MSV, & PGA GUNS)
EN
SI-2-25-28-R1 (7/2018)2 / 4www.carlisleft.com
1. Remove adjusting knob, needle spring, spring pad,
and needle from gun.
2. Loosen packing nut and remove.
3. Remove old packing. See disassembly illustration
below.
4. Assemble packing nut to needle.
5. Assemble packing in order shown to needle.
6. Insert needle all the way into gun body seating in tip.
7. Install needle spring, spring pad, and adjusting knob.
8. Thread packing nut into gun body.
9. Tighten packin
g nut in equal increments - no more
than 1/6 turn at a time.
10. After each adjustment, pull needle open and observe
needle closure.
11. If needle snaps shut, continue adjusting nut until
there is evidence of needle bind or slow closing.
12. Back off packing nut 1/12 turn to the point where
needle snaps shut. Packing nut must remain tight
enough to prevent loosening by hand.
13. Pull needle several times to ve
rify needle snaps shut
and check packing nut for looseness.
NOTE 1:
JGV-463 Packing Replacement Instructions
2 piece packing covered by U.S. Patent No. 5,209,501.
Other patents pending.
PACKING REPLACEMENT
INSTRUCTIONS
NOTE 2: GTI-33 Baffle Seal Replacement
5. Install baffle on gun.
6. Install fluid tip and tighten to 20-25 ft-lbs.
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.
1. Remove fluid tip.
2. Remove b
affle.
3. Remove seal (7) from baffle.
4. Assemble seal to baffle with angled
side up as shown at right.
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.
ANGLED SIDE
SEAL
THICK SIDE
BAFFLE
Pry here if
necessary
PREVENTIVE MAINTENANCE
SPRAY GUN LUBRICATION
Daily, apply a drop of gun lube at trigger stud screw (15) and
the stem of the air valve (12) where it enters the air valve
assembly. The shank of the fluid needle where it enters the
packing nut should also be lubricated. Make sure baffle
and retaining ring threads are clean and free of foreign
matter. Before assembling air cap to baffle, clean the
retaining ring and baffle threads
thoroughly, then add
two drops of spray gun lube to threads.
The fluid needle spring (4), and air valve spring (13), should
be coated with a very light grease, ensuring that any excess
grease will not clog the air passages. For best results, lubricate the points indicated daily using SSL-10 spray gun lube.
A. Trigger points
B. Packing
C. Adjusting valve
D. Baffle and retaining ring threads
E. Air valve c
artridge
FOR HVLP GUNS ONLY:
NOTE
If the baffle is removed, baffle gasket (7) and
O-ring (8) should be replaced. To prevent damage
to the O-ring during installation, apply gun lube
to exterior of O-ring and ID of baffle.
To clean air cap and fluid tip, brush exterior with a stiff bristle brush. If necessary to clean cap holes, use a broom straw
or toothpick. Never use a wire or hard instrument. Th
is
may scratch or burr holes causing a distorted spray pattern.
To clean fluid passages, remove excess material at source,
then flush with a suitable solvent using a device such as the
Solvent Saver
TM
. Wipe gun exterior with a solvent dampened
cloth. Never completely immerse in solvent as this is detrimental to the performance and gun life expectancy, as well
as destroying the lubricants and packings.
FOR GUNS WITH S.S. FLUID INSERTS ONLY:
To prevent serious gun damage, do not remove
the fluid tip if the fluid inlet adapter has been
removed. The stainless steel fluid insert can break
free (which is non-repairable). Remove the fluid tip
before
removing the fluid inlet adapter. Use a new
gasket before reinstalling the fluid inlet adapter.
To prevent damage to the fluid tip or fluid needle,
be sure to either 1) pull the trigger and hold while
tightening the fluid tip, or 2) remove fluid needle
adjusting screw to relieve spring pressure.
PROP 65 WARNING
WARNING: This product contains chemicals known
to the State of California to cause cancer and
birth defects or other reproductive harm.
CA PROP
65
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