Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List page 134

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
b) Remove Coupling Assembly
WARNING
To prevent personal injury, keep fingers and hands clear of generator assembly until
the armature is block into place to prevent rotation.
(1) Refer to Figure 3. Using a socket wrench, remove all three of the 3/8-16 bolts that secure the
bushing to the hub.
(2) Using a 3/16-inch Allen wrench, loosen the set-screw in the bushing to release pressure on the
key.
(3) To separate the bushing from the hub, lubricate two of the 3/8-16 bolts and insert them into the
two threaded holes in the bushing flange. With socket wrench, screw these bolts into the bushing
such that the bushing pops loose from the hub, alternating from bolt to bolt.
(4) When the bushing is loose in the hub, use a mallet to GENTLY tap the bushing out of the hub.
(5) Slide the coupling assembly off the shaft and remove the key.
(6) Inspect the coupling assembly components carefully as follows:
a Check for deformed fan blades and damage to the disk.
b Check the rubber exposed at both ends of the bushings for signs of deterioration.
c Check hub and bushing for cracks, evidence of galling, fretting and rust pits. Light rust is
permissible on the bushing and the tapered bore of the hub.
May 2, 2013
Access to Coupling Bolts
(for removal or installation)
Figure 2
Chapter 3-2
Page 2