Repair
8
309495L
Repair
1.
page 4, and engage trigger lock.
2.
When removing gun from hose, hold hex
end of fluid tube assembly (19) securely
to avoid loosening fluid tube from gun
body.
3.
If fluid continues to flow after trigger is
released, gun valve may need
adjustment, be obstructed or damaged,
or valve stem (24), seat (26), or seal (3)
may be worn or damaged.
a.
Adjust valve or spring tension as
instructed on page 8.
b.
Replace valve seal, stem, or seat as
instructed on page 10.
c.
To inspect valve for obstruction or
damage, disassemble gun as
instructed on page 10. Clean and
inspect parts. Replace any worn or
damaged parts and assemble gun
as instructed on page 10.
4.
Follow torque, sealant and lubrication
notes.
After adjusting or servicing the gun make
certain fluid does not flow or spray when
trigger lock is engaged. If fluid does flow or
spray, gun is not assembled properly or
trigger lock is damaged. Reassemble gun or
take to your nearest Graco distributor. Do not
use the gun until problem is corrected.
Valve Adjustment
Trigger travel and valve opening is factory set
to 1 in. (25.4 mm). Use following procedure
to adjust setting,
1.
page 4, and engage trigger lock.
2.
Disconnect gun from hose.
3.
Loosen stem nut (1) and spring housing
(28).
4.
Insert a 1/8 hex allen wrench through
hole in spring adjustment screw (21) and
into spring housing (28).
5.
Turn spring housing (28) and stem nut
(1) to change trigger travel and size of
valve opening.
6.
Tighten stem nut (1) to set adjustment.
7.
Adjust spring adjustment screw (21) to
desired trigger pull force.
Spring Tension
Adjustment
1.
page 4, and engage trigger lock.
2.
Disconnect gun from hose.
3.
Turn spring adjustment screw (21) as
needed until spring force is adjusted to
close valve.
Before performing any repairs on the gun,
read all warnings in this manual and the
equipment manual.
