recommended minimum frequency of performance for equipments and
components under the following major areas:
Air Source (Compressors, air storage flasks).
Piping System (Piping, valves, regulators, filters,
Recompression Chamber (Valves, BIBS, hatches, lighting,
Detailed recommended maintenance procedures for each of the
maintenance practices addressed by this section are provided in
Breathing Gas Supply Equipment Maintenance Practices
Engine Driven Air Compressor.
(a) Sample and inspect lubricating oil.
(b) Inspect oil level and rotate compressor
crankshaft by hand.
(a) Inspect/clean air coolers, fan, hoses and
(b) Inspect/renew discharge air filter.
(c) Test operate compressor, lift relief valves(s)
by hand, and test air inlet and discharge
(a) Inspect receivers, coolers and piping for
external corrosion, and sound and tighten
Semiannually or Per Manufacturers Recommended Number
of Operating Hours (first to occur):
(a) Renew oil in compressor crankcase
(b) Clean compressor air intake filter.
(c) Inspect drive belt tension.
(d) Renew oil in engine crankcase and clean fuel
(e) Measure spark plug and breaker point gap.
(f) Clean engine air filter.
(a) Test operate the compressor and inspect air
system piping under full working pressure.
(b) Test all relief valves for proper lifting
Per Cycle (Normally 3 to 4 Years):
(a) Test over-temperature shut down device.
(b) Disassemble compressor and inspect internal
parts for wear.