. MAINTENANCE OUTLINE OF SERVICE 4 - 6 GREASE Grease is used to p reven t seizure and noises a t the joints. This construction e quipment i s used under hea vy-duty conditions. use recommende and follow the c hange i nterva d recommended ambient temperatures given in t his Operation and Maintenance Manual Grease fittings not grease. If any part become s stiff after being used for lon g time, add grease. Always wip e of f all of the old g rease that is pus hed out when greasing Be particularly care ful to wipe off the old grease in place s where sand or dirt sticking in the grease would cause wear of the rotating parts ittings for so they do