Grain Systems Unload Augers PNEG-1722 - Manual (Page 25)

6. Maintenance
PNEG-1722 Series II Sweep Protected Cord Slip Ring Sump 25
Rings
1. Inspect the ring surface for dirt, oxidation or other contaminants. A properly operating ring will have
a film that appears burnished in color with a darker surrounding color where the brushes track.
If the ring requires cleaning, order slip ring polishing kit #41286.
Electrical Connections
1. Inspect all electrical connections for corrosion and tightness. Clean corroded parts with a wire
brush and/or muriatic acid. Loose and/or corroded terminations will cause a concentration of
excessive heat.
Brush Rigging
1. Brush posts are supported between two (2) outboard bearings. The brush posts extend to the
outboard bearings and are secured by a notch in the outboard.
2. Spacing between the outboard bearings is critical to assure the free rotation of the brush rigging.
The brush posts are cut to an exact length in order to provide the proper spacing. Locate the
outboard bearings against the insulator and have a 0.20" clearance without deformation of
the material.
Enclosure Inspection
1. Moisture is a major cause of slip ring deterioration. Water will corrode parts and breakdown
insulation. Dust and dirt present within the enclosure will effect the proper operation of the
assembly. Most dusts cause excessive brush and slip ring wear and conductive dust, if allowed
to accumulate, will form a path for short circuiting.
2. A properly designed NEMA 4 enclosure will be dust tight and watertight. However, NEMA 4
enclosures do not eliminate internal condensation. Condensation can be eliminated with the
addition of a breather, drain and a thermostatically controlled heater.
3. Periodically perform an inspection by removing the enclosure and checking for condensation, water
and dust collection. If contaminants are found, wipe the enclosure and the assembly with a lint free
cloth. If the problem persists, take steps to remedy the leakage or condensation problem.
Slip Ring Storage
1. When storing the slip ring, keep it at room temperature in a clean, dry, protective place. Place
self-contained or bagged absorbent material in the collector ring enclosure during extended periods
of storage. Remove absorbent material before putting collector ring into operation.
Serial Number
1. Make the following information available when ordering replacement parts or discussing the slip
ring with the factory by recording the information in the spaces provided here. This information is
located on the packing slip, factory invoice and serial number tag.
Catalog No. Slip Ring:_________________________
Serial No.:________________________________
Date of Purchase:____________________________
Do not over-tighten the outboard brush post jam nuts. Make a final check to
assure there is no binding of the outboard brush rigging or binding of brushes
with insulator barriers.