Close cartridge filter block valve (1, Figure 4-48, sheet 1).
Open vent valve (2).
Open valve (3) and drain the cartridge filter.
Unscrew coupling nut (3A) from elbow (4) and remove tubing.
Unscrew coupling nut (4A) from elbow (5) and remove tubing.
Disconnect clamps (6) and remove butterfly valve (6A), pipe section (7) and gaskets (8).
Open drain valve (9) to drain pipe section (19).
Unscrew coupling nut (10) from elbow (11).
Remove two capscrews (12), lockwashers (13), washers (14), nuts (15) and washers (16).
Disconnect clamp (17) and clamp (18). Remove pipe section (19) with gasket (20) and gasket (21). Pipe section is now free.
Remove capscrews (22), lockwashers (23) and washers (24). Tank is now free to be removed.
Support tank so it can not fall.
Remove twelve capscrews (25), washers (26), nuts (27) and lockwashers (28) and remove brackets (29 and 30).
Refer to Figure 4-48, sheet 2 and remove cover (31) by opening T-bolts (32) on clamp (33).
Remove gasket (34).
Remove nut (35) and washer (36), plate (37), retainer (38), ten springs and seals (39), ten filters (40) and ten filter guide posts
(41), if necessary.
Remove valves (2 and 3) and elbows (4 and 5).
Replace T-bolts (32) if damaged or stripped.
Replace gasket (34) if damaged.
Replace any missing or damaged components.
Replace valves (2 and 3) if they don't shut off or are plugged.
Repair leaking pipe threads with antiseize tape.
Use a wire brush on threads to remove built up dirt or other foreign matter.
Repair a plugged drain nipple on the bosom of the filter housing (42) by inserting a screwdriver or similar tool from beneath the
filter housing. To open the clogged nipple, an alternate method is to use a drill to remove the blockage.
Install valves (2 and 3) and elbows (4 and 5).
Install ten filter guide posts (41), ten new filters (40), ten springs and seals (39), retainer (38), plate (37), washer (36) and nut
Install gasket (34).
Change 12 4-185