A clutch assembly (30; 130; 230) comprising: a journal bracket assembly (42; 142; 242) having a base (142-1; 242-1), a stub shaft (142-2; 242-2) that extends axially from the base, and a passage (142-3; 242-3) that extends through the base and the stub shaft between opposite front and rear openings (142-3F and 142-3R; 242-3F and 242-3R), wherein the journal bracket assembly is rotationally stationary; pulley bearings (148; 248); an integrated pulley/shaft (44; 144; 244) including a pulley (144-1; 244-1) and a center shaft (144-2; 244-2), wherein the center shaft includes a cup-like hub (144-2H; 244-2H) and a distal portion (144-2D; 244-2D) that extends axially from the cup-like hub, wherein the cup-like hub is supported on the pulley bearings, wherein the pulley bearings are located at least partially within a hollow interior area (144-2I; 244-2I) of the cup-like hub; and a clutch mechanism (40; 140; 240) supported on the distal portion of the center shaft, with the distal portion of the center shaft defining an axis of rotation of the clutch mechanism, wherein the clutch mechanism (140; 240) is a viscous clutch, characterized by further comprising: a threaded bracket journal (146; 246) threadably coupled to the stub shaft, wherein the pulley bearings (148; 248) are supported on the threaded bracket journal in a radial direction, wherein the threaded bracket journal is accessible through the rear opening of the passage, wherein the threaded bracket journal is located at least partially within the hollow interior area of the cup-like hub, and wherein the hollow interior area of the cup-like hub is blind from front and radial directions. a journal bracket assembly (42; 142; 242) having a base (142-1; 242-1), a stub shaft (142-2; 242-2) that extends axially from the base, and a passage (142-3; 242-3) that extends through the base and the stub shaft between opposite front and rear openings (142-3F and 142-3R; 242-3F and 242-3R), wherein the journal bracket assembly is rotationally stationary; pulley bearings (148; 248); an integrated pulley/shaft (44; 144; 244) including a pulley (144-1; 244-1) and a center shaft (144-2; 244-2), wherein the center shaft includes a cup-like hub (144-2H; 244-2H) and a distal portion (144-2D; 244-2D) that extends axially from the cup-like hub, wherein the cup-like hub is supported on the pulley bearings, wherein the pulley bearings are located at least partially within a hollow interior area (144-2I; 244-2I) of the cup-like hub; and a clutch mechanism (40; 140; 240) supported on the distal portion of the center shaft, with the distal portion of the center shaft defining an axis of rotation of the clutch mechanism, wherein the clutch mechanism (140; 240) is a viscous clutch, characterized by further comprising: a threaded bracket journal (146; 246) threadably coupled to the stub shaft, wherein the pulley bearings (148; 248) are supported on the threaded bracket journal in a radial direction, wherein the threaded bracket journal is accessible through the rear opening of the passage, wherein the threaded bracket journal is located at least partially within the hollow interior area of the cup-like hub, and wherein the hollow interior area of the cup-like hub is blind from front and radial directions.