Graco Inc. 223660 - Manual (Page 11)

11 307-730
Roller Valve
WARNING
Always follow the Pressure Relief Procedure
Warning on page 10 before attempting any repair.
NOTE: Order Repair Kit P/N 218–960 to repair this roller
valve.
1. Tap out the pin (A) from the trigger (B) and slide the
trigger off of the valve (N). See Fig 6.
2. Remove the cap (C). Use a 1/2 in. socket wrench to
screw the fluid housing (D) out of the valve. Remove
the o–ring (J). See Fig 6.
3. Pull the needle (K) out with needle nose pliers. See
Fig 6.
4. Tap the seat (G) out of the valve (N). See Fig 6.
5. Remove the ball (F) and spring (E) from the valve
handle. See Fig 6.
6. Turn the nylon screw (L) into the packing (H). Insert
the needle (K) through the bottom of the housing (D)
and push the packing out the top of the fluid housing.
See Fig 7.
7. Clean all parts thoroughly. Use a cotton-tipped swab
or pipe cleaner to clean small orifices.
8. Grease the needle (K) and packing (H). Insert the ta-
pered end of the needle into the back (flat) side of the
packing. See Fig 8.
9. Guide the tapered end of the needle into the assem-
bly tool (M) and press the lips of the packing over the
end of the tool. See Fig 8.
10. Guide the tool (M) into the fluid housing (D) until the
needle protrudes through the bottom of the housing.
Lightly tap the end of the tool until you “hear” the
packing bottom in the housing. Remove the tool with
pliers. See Fig 8.
11. Grease the seat (G) and place it on the fluid housing
so the seat which is formed on the inside diameter
faces out. See Fig 9.
12. Install the spring (E) in the spring cavity of the valve
handle (N), then install the ball (F) so it is centered
on the spring. See Fig 9.
13. Place the o-ring (J) around the fluid housing. Pushing
lightly with your fingers, start the threads of the hous-
ing into the valve handle. T orque the housing to
23–27 in–lb (2.6–3 N.m). See Fig 9.
14. Push on the needle until you feel some resistance.
15. Grease the cap (C) and place it on the end of the
needle. See Fig 9.
16. Slide the trigger (B) into place. Install the pin (A) in
the trigger. See Fig 6.
0290
N
E
F
G
H
J
K
D
C
B
A
Fig 6
Fig 7
0291
L
H
D
K
Fig 8
0292
M H K D
TAPERED END
LIPS OF PACKING
(H) FACE OUT OF
HOUSING (D)
Fig 9
0293
J
D
TORQUE TO
23–27 in–lb
(2.6–3 N.m)
P
CENTER ON SPRING
C
G
N
E GREASE
SEAT MUST
FACE BALL