Graco Inc. 308178 - Manual (Page 9)

9 308178
Service
Servicing the Shaft O-Rings
1. Relieve the pressure.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 4.
2. Place a container under the surge suppressor,
disconnect the hoses, and turn the surge
suppressor on end to drain the fluid.
3. Remove the v-clamp (6). See the Parts Drawing
on page 12.
4. Separate the housing (8) from the cover (7) to
expose the diaphragm and shaft assembly. Pull
the diaphragm and shaft out of the housing. See
Fig. 2.
5. Remove the three o-rings (19) from the shaft (11).
6. Lubricate the three new o-rings (19*) with
lithium-based grease and install them in the
grooves on the shaft.
7. Lubricate the inner diameter of the housing (8) with
lithium-based grease. Slide the shaft and
diaphragm assembly into the housing (8). Place
the cover (7) on the housing (8).
8. Position the clamp (6) around the housing (8) and
cover (7). Apply thread lubricant to the threads of
the v-clamp, secure with the nuts, and torque to 6
to 10 ft-lb (1.4 to 13.6 N.m). See the Parts
Drawing on page 12.
Servicing the Diaphragm and Shaft
NOTE: Diaphragm Repair Kits are available. See page
14. Parts included in the kits are marked with
asterisks. The kits include some parts which are not
used on the surge suppressor. Use all the applicable
parts in the kit for the best results.
1. Relieve the pressure.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 4.
2. Place a container under the surge suppressor,
disconnect the hoses, and turn the surge
suppressor on end to drain the fluid.
3. Remove the v-clamp (6). See the Parts Drawing
on page 12.
4. Separate the housing (8) from the cover (7) to
expose the diaphragm and shaft assembly. Pull
the diaphragm and shaft out of the housing. See
Fig. 2.
5. Hold the bolt (14) steady with a wrench. Wrap a
rag around the shaft (11) to protect it, then
unscrew the shaft from the bolt using locking
pliers. Remove the nut (31), upper diaphragm
plate (32*), diaphragm (13), PTFE diaphragm
(Models 224892 and 224894 only), lower
diaphragm plate (12), and o-ring (15) from the bolt.
Clean and inspect all parts for wear or damage.