Patent ID: 7544646

Claim:
A method for lubricating a sootblower wherein the sootblower comprises (a) a lance tube having one or more nozzles at the forward end of the tube; (b) a lance hub rigidly attached to the rear end of the lance tube; (c) lance support bearings, which attach to the lance tube through the lance hub, allowing for the rotation of the lance tube; (d) a drive train connected to the lance hub wherein the drive train is housed in a gearbox and comprises a set of gears or chains or combinations of these; (e) shafts on which the gears or chains of the drive train are mounted; and (f) shaft bearings and seals on which the shafts are mounted, the method comprising charging the gearbox with a thermally and oxidatively stable grease having a viscosity of at least 25 centistokes at 40° C. wherein the grease comprises a halogenated oil and a thickening agent.