Sheet 2300-10, Page 2
BELT TENSION: Follow manufacturer's instructions Removal of Belts: Some types of belts will be damaged if removed without loosening tension. Move motor to avoid this danger. To remove or install sheaves, see manufacturer's instructions.
Be sure grease gun is clean inside and out before using or loading. Thoroughly clean area around bearing or coupling before greasing or disassembling for greasing. Do not use a power grease gun—pressure build-up in the grease cavity can cause bearing failure. Use clean wiping cloths. G. Lubrication Procedure. MOTOR BEARINGS. Follow motor manufacturer's recommendations. COUPLINGS. Thorough method—preferred if coupling is badly in need of service. 1. Disassemble coupling. Do not remove from shafts. 2. Wash all parts thoroughly with clean petroleum solvent or kerosene. 3. Reassemble coupling with two plugs 180° apart. 4. Grease as in short method below. Short method for more frequent lubrication: 1. Remove both plugs. 2. Install grease fitting in one opening. 3. Pump in new grease until old grease is eliminated and new, clean grease flows from opposite opening. 4. Replace both plugs. JACKSHAFT BEARINGS (split pillow block type). Thorough method preferred if bearings are badly in need of service: 1. Remove bearing caps, marking them for return to some pillow blocks. On belt driven units, end of shaft opposite sheave may lift due to belt tension. This can be avoided by servicing one bearing at a time. 2. Thoroughly wash bearings, pillow blocks, and caps with clean petroleum solvent or kerosene. Do not blow out with compressed air. It may contain rust, water or abrasives. 3. Pack bearings between races with fresh, clean grease. 4. Fill housing 1/3 to ¼ full of grease. 5. Replace bearing caps in original location. 6. Be sure shaft turns freely by hand. 7. Remove drain plug and operate blower until grease stops flowing from drain. 8. Replace plug. Short method for more frequent lubrication. 1. Install grease fitting in upper opening if necessary. 2. Remove drain plug. 3. Pump in new grease until old grease is eliminated and new, clean grease flows from drain. 4. Operate blower until no more grease flows from drain. 5. Replace plug.
A
C
D
B
PULLEY
PULLEY
Figure 1. Plan view (looking down) showing how pulleys should be aligned so that a straight edge touches at points A, B, C, and D. E. Lubrication Frequency. Motor bearings may require lubrication as often as every few weeks or as seldom as every few years depending on horsepower, manufacturer, type of grease, and severity of operating conditions. Follow manufacturer's recommendations. Couplings should be greased every six months to two years depending on severity of operating conditions. Jackshaft bearings should be greased every six months to two years depending on severity of operating conditions. The worst condition would be continuous service at the allowable bearing temperatures. F. Coupling and Jackshaft Bearing Grease. Grease characteristics for satisfactory lubrication vary widely with operating conditions such as temperature and atmospheric conditions. Follow the bearing manufacturer's recommendations if possible. Use the same grease for couplings. Shell's Alvania E.P.1 lithium base grease has been satisfactory on many heavy duty applications in a wide range of temperatures. Mixing greases of different bases may cause bearing failure. If changing to a different type grease, be sure that all old grease is removed from the bearings. Some special bearings may require special oil. These are shipped tagged with lubricating instructions. If the tag is lost, obtain the S.O. number from the blower nameplate and consult Fives North American's home office. Care of Grease. Even a small amount of dirt or grit in a bearing may ruin it in a few hours. Keep grease in a clean covered container. Clean outside of container thoroughly before opening. Do not use dirty paddle or hand to fill grease gun or to pack a bearing.
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