Abstract: In a method for servicing an apparatus having a compressor (22) mounted to a support structure (32, 38, 40), a guide structure (102, 104; 202, 204) is placed adjacent to the support structure. The compressor is lifted from an installed position. The compressor is withdrawn by rolling the compressor along the support structure and guide structure.

Abstract: A shaft seal assembly has a support body (222) and a seal (200). The support body extends from a first end (210) to a second end (212) and has a central passageway (214) for accommodating the shaft. The support body has a compliant axially intermediate portion (230), an axially out-board portion (228) outboard of the compliant intermediate portion, and an axially inboard portion (226) inboard of the intermediate portion. The in-board portion has an externally threaded portion (270) and a plurality of slots (290) through the externally threaded portion. The seal is carried by the out-board portion.

Abstract: In a method for servicing an apparatus having a compressor (22) mounted to a support structure (32, 38, 40), a guide structure (102, 104; 202, 204) is placed adjacent to the support structure. The compressor is lifted from an installed position. The compressor is withdrawn by rolling the compressor along the support structure and guide structure.

Abstract: A system has a compressor having a compression path between a suction port located to receive a working fluid and a discharge port located to discharge the working fluid. The system has means for controlling a flow of at least one of additional working fluid and lubricant responsive to changes in at least one pressure parameter.