Reassemble The Gun - Graco XHF A Series Instructions Manual

Maintenance
7. Remove the needle (D). Unscrew the seal
retainer (E) then remove the seal (F).
D
8. Clean all parts and cavities thoroughly with a
compatible flushing fluid. Dry with a rag or
compressed air. Replace any parts that are worn or
damaged.

Reassemble the Gun

1. Lightly grease the inner cavities of the fluid
housing (R). Install the small seal (F) so the lips
face into the fluid housing cavity. Install the seal
retainer (E) and torque to 30-40 in-lb (3.4-4.5 N•m).
E
F
R
2. Lightly grease the small end of the needle (D) then
guide it into the large end of the fluid housing (R).
D
R
12
E
F
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3. Place the gasket (C) on the valve seat (B). Grease
the threads of the valve seat (B) then install into the
fluid housing (R). Torque to 20-25 ft-lb (27-34 N•m).
B
C
R
4. Install the spring guide (M) and seat it against the
needle. Loosely thread both set screws (N) into the
spring guide then alternately and evenly tighten the
set screws to 10-15 in-lb (1.1-1.6 N•m). Fill the set
screw cavities with petroleum jelly.
5. If the spring (P) was removed, grease the spring
adjuster (SA) and place the spring on the adjuster
then drop into the gun body (A).
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M
N
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P
SA
A
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