Paint Application. Prepare and apply surface paints according to the
procedures detailed in par. 220.127.116.11.
18.104.22.168 Surface Preparation. Before applying the paint, prepare all surfaces.
Foreign substances on the surface interfere with the protective action of the coating.
Therefore, remove loose scale, rust, dust, oil, or grease completely. For best results,
paint only clean surfaces. Sandblast metal surfaces if required. Use sandpaper on a
wire brush where required. Wipe off dust and clean greasy or oily surfaces with solvent
cleaners. Take special precautions when removing lead-based paints. See
22.214.171.124 Preparation of Paint. Paint should be mixed properly and screened, if
necessary, to remove grit and film. Cover paint containers when not in use. Clean
brushes, rollers, and spray applicators before and after use. For damp surfaces, where
drying temperatures are less than 40F (4C), specially prepared paints are normally
Corrosion-Preventive Compounds. Corrosion-preventive compounds are
used in pits, pump dry-wells, and damp areas. Paint does not serve this purpose. Two
corrosion-preventive compounds commonly used in waterworks are shown in Table 40.
Chain Drive. Chain drives may be designed for slow, medium, or high
speeds. Follow these steps to maintain chain drives:
Check Operation. Check general operating conditions during
regular tours of duty.
Check Chain Slack. The correct amount of slack is essential for
proper chain drive operation. Unlike belts, chains should not be tight around the
sprocket. When chains are tight, working parts carry a much heavier load than
necessary. Too much slack is also harmful. A properly installed chain has a slight sag
or looseness on the return run. All drive chains should have a tightener.
Check Alignment. If sprockets are not in line or if shafts are not
parallel, excessive sprocket and chain wear results. To check alignment, remove the
chain and place a straight edge against sides of the sprocket where no wear has
occurred. Replace sprockets and chain if they are excessively worn.
Lubricate. Lubrication depends on the drive speeds. Refer to the
manufacturer's manual and par. 11.6.2 for lubricant types.