11. Air Coolers
Annual. Clean exterior surfaces of coils and check for leaks.
Not Scheduled. Check interior of coils for excessive scale buildup. If scale is excessive, clean
mechanically or with an approved chemical treatment. Perform a hydrostatic test after cleaning to check
12. Unit Brakes
Monthly. Check condition of brake air line filters and lubricators. If lubricator is not installed, operate
unit jacks to lubricate brake cylinders.
Annual. Measure brake shoe thickness and check condition of brake ring. Operate brake
cylinders to check for any binding or sticking. If necessary disassemble brake cylinders, and
Monthly. Check electrical control circuits and indicating lights.
Semiannual. Weigh all
cylinders and replace cylinders in which the
content weighs less than 90
percent of the weight marked on the cylinder by the supplier.
system by disconnecting the detonators of all except those
cylinders that are under
test and operate the actuating contacts by hand to release
into the generator housing. Observe for
proper operation and for leaks in the system and generator housing.
cylinders that are being removed
because of loss of weight may be used for this test. All
cylinders must be discharged and then
hydrostatically tested by qualified suppliers every 12 years. Any cylinder that has been discharged that has
not been hydrostatic tested within 5 years must be hydrostatic tested before refilling.
14. Inspection Reports
15. Impeller or Rotor and Casing
Annual. If inspection ports are available, the pump impeller should be inspected annually. Check for leaks
from casing at gasketed joints and tighten or replace gaskets as required. Take ammeter readings of pump
motor with pump at full capacity. A decrease in amperage indicates a decrease in pump output, which suggests
some maintenance is required.