10
Maintenance
Topics Covered in this Chapter
Lubrication Guide
The motor bearings use a No. 2 consistency lithium complex base grease.
The following lubrication table is a general guide for normal operating conditions. However, if the bearing
is subjected to excessive operating conditions, a more frequent schedule may be needed.
Table 10-1
Suggested lubrication period in weeks
Hours run per day
751 to 1500 RPM
8
7
16
4
24
2
Storage or special shutdown
If the dryer will be idle for some time, before shutting down, add grease to the bearing until the grease
purges from the seals. This will ensure protection of the bearing, particularly when exposed to the severe
environmental conditions. After storage or an idle period, add fresh grease to the bearing before
operating.
Belt Tensioning
If any of the following conditions exist, adjust the tension on the belts until they are alleviated:
• The belts squeal as the motor is turned ON.
• The belts do not have a slight bow on the slack side when they are operating at full loads. A properly
tensioned belt will have a slight bow. The belts could be too loose or too tight.
• The sheave is excessively hot. To test, shut OFF power sources and lock out controls. Hold your
finger in the sheave groove, it should be warm but not too hot to touch. If it is too hot, the belt tension
should be loosened.
PNEG-2132
Pressure Cooled Quiet Portable Dryer
63
