AIR REGULATOR PRESSURE ADJUSTING SCREW. TURN CLOCKWISE TO
DECREASE PRESSURE. COUNTERCLOCKWISE TO INCREASE PRESSURE
Figure 3-4. Exterior View of Air Pressure Regulator with Gauge
Section II. Prestart procedures
Prestart. Prestart procedures Include before operation preventive maintenance checks and procedures. See
Startup after extended shutdown. Refer to paragraph 3-8.2 for extended shutdown information.
Check major components for loose wires. Make sure fittings are tight, gauges are clean and have Intact glass
faces. Check pipes for leaks Repair or replace as necessary.
Check oil level in sight glass on compressor as follows:
Barge 1 (Figure 3-2). 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 not 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 mark on sight glass.
Barges 2 and 3, (Figure 3-3). 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.
Close compressed air main supply valve on forward end of receiver by turning handle at right angle to pipe.
Drain air filters 1 and 2 by opening drain valves on bottom of filters (Figure 3-5). When water and moisture have
drained, close drain valves.