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Section 6
MAINTENANCE
2. Remove the 3/4"-10 jam nut and sealing hex nut
from the 3/4"-10 separator hold down rod.
3. Remove the round separator cover plate from the
top of the separator element.
4. Remove the old separator element and discard.
5. Scrape the old gasket material from the tank lid
mounting surface and the flanges mounting sur-
face on the tank. Be sure to keep all scrapings
from falling back inside of the tank.
6. Before installing the new separator elements,
make sure to lubricate both sealing gaskets on
the element with a lubricating compound (i.e.
Silglyde). Now install the new separator ele-
ments and retaining ring. Torque the capscrews
to 85 to 90 ft.-lbs. (115 to 122 Nm). DO NOT
over-tighten, as damage to the separator ele-
ment can result.
7. Next, install the tank flange gasket that is provid-
ed. Before installing, lubricate both sides of the
gasket (i.e. Silglyde). Reinstall the tank lid.
Install the capscrews finger tight, then gradually
tighten in a crisscross pattern in 4 to 5 steps.
Always tighten the capscrews alternately at
Figure 6-4 Oil Return/Sight Glass
*Replacement Filter Assembly P/N 02250117-782
38
opposite sides of the cover. Lube torque cap-
screws to 200 ft.-lbs. (271Nm).
8. Clean or replace fluid return line strainer.
9. Clean the fluid return line orifice installed in the
side of the compressor unit air end.
10. After assembly is complete, check for continuity
between the separator flange and the lid and
tank flange with an ohmmeter.
OIL RETURN/SIGHT GLASS MAINTENANCE
Refer to Figure 6-4. The oil return/sight glass sub-
assembly is attached to the separator tank lid. Oil
return/sight glass maintenance should be per-
formed on a routine basis parallel to that of the fluid
filter, or as indicated in the Troubleshooting
Sections (both Supervisor II and Maintenance) of
this manual.
The maintenance on an oil
return/sight glass is mainly concerned with the con-
dition of the filter assembly. Order filter assembly
no. 02250117-782, and use the following instruc-
tions as a guide.
Always performing maintenance on both oil
return/sight glasses at the same time.
1. Disconnect the tubes at the tops of the sight
glass assemblies.
2. Unscrew male connector (for left-side glass), or
the straight thread tube connector (for right-side
glass) from sight glass/orifice blocks.
3. Remove used filter assembly, and replace with
new assembly.
4. Coat/lubricate the o-rings will silicone grease.
5. Reattach the connectors to the sight glass/orifice
blocks.
DIFFERENTIAL
PRESSURE
ADJUSTMENT
Refer to Figure
6-5
and 6-6. The differential pres-
sure regulators are adjusted by loosening the
adjusting screw on the end of the cone-shaped
cover of the pressure regulator. When the jam nut
is loose, turn the adjusting screw clockwise to
increase or counterclockwise to decrease the set-
ting.
The reference pressure regulator should be set to
maintain a 60 psig (4.14 bar) downstream pressure
to the inlet poppet valve. The unload pressure reg-
ulator should be set at 150 psig (10.3 bar) to con-
trol the compressor package during unload only.
The inlet poppet valve control pressure regulator
should be set to control the systems modulation to
REGULATOR
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