in-Hg. (584mm) and reclose at 20 in-Hg. (508mm).
FLUID RETURN/SIGHT GLASS MAINTENANCE
Refer to Figure 6-5. The fluid return/sight glass sub-
assembly is attached to the separator tank lid. Fluid
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 Section
of this manual. The maintenance on an fluid
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.
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
DRIVE COUPLING INSTALLATION
Refer to Figure 6-6. For coupling installation, the
tools required will be one set of standard Allen
wrenches and socket wrenches. All vacuum units
are flange mounted to the motor making them self-
aligning eliminating the need for alignment proce-
dures.
6.8 TROUBLESHOOTING - INTRODUCTION
The information contained in the Troubleshooting
chart has been compiled from field report data and
tests done at the factory. It contains symptoms and
usual causes for the described problems, however
DO NOT assume that these are the only problems
that may occur. All available data concerning any
trouble should be systematically analyzed before
undertaking any repair or component replacement
A detailed visual inspection is worth performing for
almost all problems and may avoid unnecessary
additional damage to the compressor.
• Check for loose wiring.
• Check for damaged piping.
• Check for parts damaged by heat or an elec-
trical short circuit, usually apparent by dis-
coloration or a burnt odor.
Should your problem persist after making the rec-
ommended check, consult you nearest Sullair rep-
resentative or the Sullair Corporation factory.
Section 6
MAINTENANCE
51
Always perform maintenance on both fluid
return/sight glasses at the same time.
Figure 6-6 Drive Coupling
*Replacement Element P/N 02250152-670
6.9 TROUBLESHOOTING - GUIDE
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
VACUUM UNIT WILL NOT
START
Main Disconnect Switch Open Close switch.
Line Fuse Blown. Replace fuse.
Control Transformer Fuse Blown Replace fuse.
Motor Starter Overloads Tripped Reset. Should trouble persist, check whether
motor starter contacts are functioning proper-
ly.
Low Incoming Line Voltage Check voltage. Should voltage check low,
consult power company.
Continued on page 52
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