Table 36 (Continued)
Check for leakage; disassemble unit,
clean, and lubricate; check working
parts and cables; repack stuffing box;
check knife edges.
Check at zero differential; adjust
indicator arm and recording pens;
check stop collars on cables.
Check accuracy and percent error; if
greater than 3 percent, adjust.
Check and clean as necessary.
Clean float and check mercury; paint
all parts requiring protection.
Check for joint leaks; check pipe
hangars and replace, if necessary;
paint as necessary.
(1) W-Weekly; M-Monthly; Q-Quarterly; SA-Semiannually; A-Annually; V-Variable,
as conditions may indicate.
(2) The frequencies shown are suggested frequencies that may be modified by local
command, as individual installation conditions warrant.
Each month, drain the filter to the surface of the filter medium.
Inspect the surface for unevenness, sinkholes, cracks, and evidence of algae, mud
balls, or slime.
If depressions or craters on the surface area are of
appreciable size, dig out the sand and gravel, and locate and repair any break in the
Remove mud balls manually or break them up with high-