Clean sludge from bottom of tank with clean water under pressure.
Clean entire tank with drycleaning solvent. Use a stiff brush to remove sediment and scale.
Inspection. Inspect the tank for dents, cracks, and punctures.
3-51. EFFLUENT LAUNDER ADJUSTABLE SUPPORT RODS.
General. The three effluent launder adjustable support rods (3, fig. 3-24) are used to support and adjust the
effluent launder. The effluent launder must be supported in some manner before removing the rods.
Adjustment. When the water in the erdlator tank begins to overflow into the effluent launder, level the launder.
Turn the three leveling rod handwheels (2) until water is flowing into the effluent launder uniformly throughout its entire
3-52. ERDLATOR BRIDGE RAILS.
General. The two bridge rails (13, fig. 1-3) across the top of the erdlator tank support the influent and effluent
launders, the erdlator agitator speed reducer and drive motor, and the erdlator agitator drive shaft assembly. The bridge
rails also support the downcomer at the top.
Inspection. Inspect the bridge rails and effluent launder for cracks, dents, bends, and broken welds.
3-53. LOW WATER LEVEL FLOAT AND VALVE.
General. The low water level float in the wet well operates a valve (8, fig. 3-34) in the raw water line. This valve
regulates the amount of water going into the erdlator tank. When the float drops the operating mechanism opens the
valve and makes contact with a sensitive switch (12) and actuates an alarm system.
Drycleaning solvent, P-D-680, used to clean parts is potentially dangerous to personnel and property.
Wear chemical resistant gloves when using solvents, and avoid repeated or prolonged skin contact.
Do not use near open flame or excessive heat. Flash point of solvent is 100 degrees F to 138
degrees F (38 degrees C to 59 degrees C).