Graco 257146 Marine Sanitation System User Manual


 
8 310643
Service
Fig. 18. Mark IV: Install o-ring (231) on sleeve spacer
(230) and install sleeve spacer on sleeve.
Fig. 18
ti7340a
231
230
Fig. 19. Reassemble intake valve with new o-ring
(227), seat (212) and ball (214). Seat may be flipped
over and used on other side. Clean seat thoroughly.
Fig. 19
227
7570f
212
214
Fig. 20. Install i ntake valve on cylinder. If a wrench is
used torque as follows:
67 +/--5 ft-lb (Model 248204, 253056, 255968,
277069)
80 +/--5 ft-lb (Model 248205, 249057, 249059,
277070, 257146 )
If a wrench is not used, be sure intake valve i s bot-
tomed out against cylinder.
Fig. 20
7569A
Fig. 21. Torque packing nut (202) down onto adjust-
ment spacer (228) 100 +/--10 in-lb.
Remove throat adjustment spacer (228) when pump
packings begin to leak after much use. Then tighten
packing nut down until leakage stops or lessens. This
allows approximately 100 gallons of additional opera-
tion before a repacking is required.
Fig. 21
202
228
7568A