Installation Operation and Maintenance Manual

Maintenance (Continued)Regrease the grease-lubricated bearingsNOTICE:Make sure that the grease container, the greasing device, and the fittings are clean. Failure to do this canresult in impurities entering the bearing housing when you regrease the bearings.1931131. Wipe dirt from the grease fittings.2. Remove the two grease-relief plugs from the bottom of the frame.3. Fill both of the grease cavities through the fittings with a recommended grease until the fresh greasecomes out of the relief holes.4. Make sure that the frame seals are seated in the bearing housing.If they are not, press them in place with the drains located at the bottom.5. Reinstall the grease-relief plugs.6. Wipe off any excess grease.7. Recheck the alignment.The bearing temperature usually rises after you regrease due to an excess supply of grease. Temperaturesreturn to normal in about two to four operating hours as the pump runs and purges the excess greasefrom the bearings.Lubricating-grease requirementsPrecautionsNOTICE:• Never mix greases of different consistencies (NLGI 1 or 3 with NLGI 2) or with different thickeners.For example, never mix a lithium-based grease with a polyurea-based grease. Doing so may result indecreased performance.• Remove the bearings and old grease if you need to change the grease type or consistency. Failure todo so may result in equipment damage or decreased performance.Bearing temperatureBearing temperatures are generally about 20°F (18°C) greater than bearing-housing outer surfacetemperatures.This table shows the type of grease required for the operating temperature of the pump.Bearing temperatureType of grease5°F to 230°F (-15°C to 110°C) Use a lithium-based mineral-oil grease with aconsistency of NLGI 2.66 Model 3796 i-FRAME Installation, Operation, and Maintenance Manual