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(b) Test safety controls to ensure proper functioning.
6.3 Annual Inspection. In addition to performing inspections specified in
paragraphs 6.1 and 6.2, perform the following procedures where applicable.
(a) Check journal and thrust bearings for wear. Adjust or replace as
(b) Check alignment and coupling condition. Visually inspect coupling
condition and use dial indicator to realign coupling within specified
tolerances  (paragraph 7.2).
(c) Clean and repaint all areas of corrosion or peeling paint on
compressor case.
(d) Check compressor bolts for tightness. Retighten loose bolts to
specified torque values.
6.4 Internal Inspection. If compressor performance has fallen off, or noise
or driver overload indicate internal trouble, dismantle the compressor and
make the following inspection.
(a) Examine casing or stator for corrosion or erosion damage and dirt.
(b) Check case for water leaks if diaphragm cooling is provided.
(c) Inspect rotor for corrosion or erosion damage to impellers or blades.
(d) Check rotor for balance.
(e) Check clearances and condition of rotor, bearings, and seals.
Record all measurements. If the need for bearing replacement is indicated,
refer to paragraph 7.3.
(f) Perform lubrication system maintenance (paragraph 7.1).
7.1 Lubrication System. Lubrication system maintenance must be performed at
intervals prescribed for each specific installation. In addition, lubrication
system maintenance shall be performed at times of internal inspection and
repair.  Lubrication system maintenance includes the following tasks.
(a) Clean oil filters and strainers or replace cartridges.
(b) Change oil if it is warranted by a chemical analysis or periodic
schedule.  To change oil perform the following tasks.
(1) Tag equipment controls.
(2) Drain oil from all systems.


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