SI-2-25-28-R1 (7/2018)
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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)
SI-2-25-28-G (OUTSIDE):SI-2-25-28-E (OUTSIDE) 12/4/14 1:35 PM Page 3
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 packing 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 verify 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 fin-
gers. 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 baffle.
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 assem-
bled with the angled side up.
ANGLED SIDE
SEAL
THICK SIDE
BAFFLE
Pry here if
necessary
SI-2-25-28-G (OUTSIDE):SI-2-25-28-E (OUTSIDE) 12/4/14 1:35 PM Page 1
PACKING REPLACEMENT INSTRUCTIONS
EN
SERVICE INSTRUCTION
KK-4987-2 GUN REPAIR KIT
(FOR JGA, JGV, JGHV, JGP, JGPV, LMG, MSA, MSV, & PGA GUNS)
