Be careful not to damage O-ring when installing cartridge cage assembly.
(3) Carefully lower assembly into the filter housing. Rotate assembly slightly, if necessary, to get O-rings
into filter housing without damage.
(4) Attach a lifting rig to top end assembly and lower onto filter housing. Insert tie rods, item 6, into tie rod
holes and align camlock connections.
(5) Install hex nuts on tie rods and torque evenly to 10 ft-lb.
(6) Connect camlock coupling.
(7) Close valve RO8.
Prepare ROWPU's for normal operation (paragraph 3-3).
Cartridge filter elements replacement. The following equipment is required to replace cartridge filter
elements on the cartridge cage assembly:
12 new filter elements (P/N 52088)
Set of socket wrenches and torque wrench
12 upper seals (spare) (Hydranautics #52085)
12 lower seals (spare) (Hydranautics #52084)
3 O-rings (spare) (Parker 2-452C557-70)
Stiff bristle brush and clean, lint-free cloths
Item numbers referenced in these procedures are shown in Figure 4-1.
Invert cartridge cage assembly and stand it on the three U-bolts.
Remove three 5/16 hex nuts, item 11; six washers, item 12; and three springs, item 13.Lift and remove lower
spider, item 16, from tie rods.
Do not attempt to remove upper or lower seals. If seals come loose, be sure to
install upper seals on upper spider and lower seals on lower spider. Failure to
install seals correctly may result in water leakage.
Remove used filter elements, item 15. Keep upper seals, item 7, separate from lower seals, item 8.
Examine used filter elements. if they contain large amounts of sand and frequency of replacement has been
increasing, check media filters for possible internal damage.
Discard used filter elements.
Clean internal parts and inside of filter housing with a stiff bristle brush and clean water. Flush with clean
water and dry with clean, lint-free cloths.
Inspect upper and lower spiders, items 16 and 17. Check seals for damage and replace if nicked. Place new
or reused upper seals in sockets on upper spider. Place lower seals on guide pins on lower spider.
Place three new filter elements in three center sockets on upper spider. Make sure upper seals remain