12-9.5 Operating compressed air system for seachests blowdown
Make sure air pressure gauges on air pressure regulators 1 and 2 indicate 40 psi. If not, adjust according to step
Follow procedures in TM 55-1930-209-14&P-2 for seachests blowdown.
12-10 Shutdown procedures. This section provides temporary and extended shutdown procedures, including after
operation preventive maintenance checks and services. Temporary shutdown is for a period of less than 12 hours.
Extended shutdown is for a period greater than 12 hours, but less than 7 days If system is to be shut down longer than 7
days, refer to TM 55-1930-209-14&P-7.
12-10.1 Temporary shutdown (less than 12 hours)
Turn AUTO-MANUAL switch on electric controller (Figure 12-3) to MANUAL.
Push electric controller STOP button.
Close main supply valve on forward end of receiver by turning handle at right angles to pipe.
When bleeding receiver and air filters 1 and 2, ALWAYS use protective shield to
protect eyes and face from flying particles. Wear gloves and avoid skin damage by
closing buttons and collars and rolling down shirt sleeves on work clothing.
Drain air filters 1 and 2 by opening drain valves on bottom of filters (Figure 12-7). When all moisture has drained,
Open receiver drain cock in bottom of receiver by turning clockwise (Figures 12-4 and 12-5). Allow air and
moisture to escape. When all moisture has drained, close valve.
.Check oil level in sight glass on compressor as follows:
Barge 1 (Figure 12-4). Oil should be visible in lower half of sight glass. If oil cannot be seen in sight glass,
remove oil cover nut in center of air intake assembly. Carefully pour no more than one pint of oil into oil
tube. Do not spill oil onto air filter assembly. Continue to add oil one pint at a time until oil level is between
bottom and halfway mark on sight glass. Do NOT overfill. Use only detergent oil, SAE 10W, API
classification CD or SF, or MIL-L-2104 or MIL-L-46152.
On Barges 2 and 3 air compressors, never allow oil level to fall more than 1/8 Inch
below full level.
Barges 2 and 3 (Figure 12-5). Oil should be up to full level mark on sight glass. If not, unscrew oil plug to
left of sight glass and add a non-detergent, rust and oxidation inhibiting industrial oil with viscosity
equivalent to an SAE grade 20 weight motor oil. See page 5, Form 5S 1408, Operating and Service Guide
for Dayton Speedaire Models, for recommended oils by brand name and designation. Add oil until it
reaches full level mark on sight glass. DO NOT OVERFILL Replace oil filler plug.
12-10.2 Extended shutdown
Perform procedures in paragraph 12-10.1.
Pull controller main ON-OFF switch (Figure 12-3) to OFF.
Open (OFF) power panel 1 circuit breaker 3P5.