Graco Inc. Series E - Manual (Page 9)

9
307–760
REPAIR
Roller Valve
WARNING
Always follow the Pressure Relief Procedure
Warning on page 8 before attempting any repair.
NOTE: Order repair kit no. 218–960 to repair this roller
valve.
1. Tap out the pin (A) and slide the trigger (B) off of the
valve. See Fig 6.
2. Remove the cap (C).Unscrew the fluid housing (D).
See Fig 6.
3. Pull the needle (K) out.
4. Tap the seat (G) out of the roller valve (N). See Fig
6.
5. Remove the ball (F) and spring (E). See Fig 6.
6. Turn the nylon screw (L) into the packing. Insert the
needle (K) through the housing (D) and push out the
packing (H). 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. Grease the free end of the needle. Guide the tool (M)
into the fluid housing until the needle protrudes
through the top of the housing. Lightly tap the tool
end 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, then install the ball (F) so it is centered on the
spring. See Fig 6.
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. Torque the housing to
1.7–2.2 N.m (15–20 in–lb). See Fig 6.
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 6.
16. Slide the trigger (D) into place. Install the pin (A). See
Fig 6.
CAUTION
Never attempt to remove the adapter fittings from
either end of the valve body (N). Doing so could
crack the body.
Fig 6
Fig 7
Fig 8
Fig 9
L
H
D
K
TAPERED END
M
D H K
LIPS FACE OUT
OF HOUSING (D)
G D C
F E
N
SEAT MUST
FACE BALL
N
E
F
G
H
J
K
D
C
B
A
TORQUE TO
1.7 – 2.2 N.m
(15–20 in-lb)