Graco Inline HD 17Y907, Operation, Parts

Page: 10 / 16

Repair
10 309495L
Valve Stem and Seal
Replacement
If fluid leaks past v-block seal (3), v-block seal
or valve stem (24) may be worn or damaged.
Use following procedure to replace v-block
seal or valve stem.
1.
Perform Pressure Relief Procedure ,
page 4, and engage trigger lock.
2. Disconnect gun from hose.
3. Unscrew spring retainer (21) and
remove spring (4).
4. Unscrew spring housing (28) with a 1/8
inch hex allen wrench.
5. Unscrew valve seat (35).
6. Remove adjustment bracket (20) and
stem nut (1) from stem.
7. Remove valve stem (24).
8. Remove seal retainer (27) and v-block
seal (3). Replace v-block seal.
9. Secure gun body (17) in an assembly
fixture.
10. Lubricate and install v-block seal (3) into
gun body (17) with lips of seal facing into
housing.
11. Lubricate and torque seal retainer (27)
into gun body (17) to 100–125 in-lb
(11.3–14.1 N•m).
12. Lubricate and install valve stem threads
(24) into gun body (17). Thread stem
assembly through v-block seal (3).
13. Thread nut (1) all way onto valve stem
(24).
14. Install adjustment bracket (20) and
spring housing (28) onto valve stem (24).
15. 15. Apply high strength anaerobic
sealant (red) to threads on valve seat
(35). Torque valve seat into gun body
(17) to 26–32 ft-lb (35.3–43.4 N•m).
16. Lubricate and install spring (4) and spring
retainer threads (21) in gun body (17).
17. Insert a 1/8 inch hex allen wrench
through spring retainer (21) and into
spring housing (28). Adjust trigger travel
and valve opening to desired position.
18. Tighten stem nut (1) to set adjustment.
19. Adjust spring adjustment screw (21) to
desired trigger pull force.
Gun Disassembly and
Assembly
Disassembly
1. Perform Pressure Relief Procedure ,
page 4, and engage trigger lock.
2. See Valve Stem and Seal
Replacement and perform Steps 2 – 7.
3. Remove two retaining rings (8), rod (13)
and trigger (29).
4. Unscrew setscrew (42), then unscrew
fluid tube assembly (19) from gun body
(17).
5. Remove gun handle screws (9), gun
handle (14), trigger lock (15), ball (2) and
spring (7).
6. Remove seal retainer (27), seal (3) and
o-rings (5 and 6).
Assembly
1. See Valve Stem and Seal
Replacement and perform Steps 9 – 11.
2. Lubricate o-ring (6) and install into gun
body.
3. See Valve Stem and Seal
Replacement and perform Steps 12 –
14.
NOTICE
Installing valve stem (24) without
turning it clockwise could damage
v-block seal and result in fluid leakage.
NOTICE
To avoid loosening connections and
damaging gun, grip gun body (17), not
handle (14), when removing fluid tube
assembly (19).