Graco PrecisionFlo 233678, Instructions-Parts List Manual

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Service
Closer Service (continued)
13. Remove the spring (109) from the cylinder body
(108). See Fig. 6.
14. Remove the rubber bumpers (101) from the cylin-
der cap (111) and valve rod (102).
15. Inspect the parts for damage and clean or replace
them as needed. Lubricate the o-rings with lithium-
based grease before re-installing them.
16. Install the o-ring (114) in the cylinder body over the
piston (113). Insert the piston and the spring (109)
into the cylinder body (108).
17. Apply anaerobic sealant (Loctite
r
242 or 243 or
equivalent) to the threads of the four screws (107).
18. Compress the spring enough to engage the screw
threads into the closer cover. Torque the four
screws (107) to 24–30 in-lb (2.7–3.4 N
S
m).
19. Install the cover o-rings (103).
20. Install the rubber bumpers (101) on the end of the
rod closer (102) and the cylinder cap (111).
21. Connect a compressed air supply to the closer air
inlet (G). Actuate the cylinder to retract the closer
rod and keep the closer spring compressed.
22. Secure the closer assembly to the metering valve
with the eight screws (3). See Fig. 4.
23. Slowly relieve the air pressure from the Metering
Valve to release the closer.
CAUTION
The motor shaft is forced to the full forward position
by the closer. Slowly relieve the air pressure to
prevent excessive impact of the shaft, which could
damage the equipment.
24. Disconnect the air line from the closer air inlet (G).
Fig. 6
TI1392A
107
109
110
114
108
105
104
111
103
113
112
102
101
112
115
101