Dual Bearing Flexible Coupling; General; Disassembly - Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
Section 2

1) General

This manual provides basic instructions for removal, service and installation of a flexible coupling
assembly, with generator fan, manufactured by Hobart Ground Systems as Part Number 288481. This
assembly is illustrated in Figure 1. The primary function of this assembly is to couple a Hobart 2000 RPM
Generator to a Diesel engine. The flexible coupling assembly compensates for slight misalignment
between the engine and the generator, due to manufacturing tolerances. A tapered bushing and hub
secures the coupling to the generator shaft.

2) Disassembly

Removal of the flexible coupling is required for servicing the generator armature, generator bearings, or
the coupling itself. To remove the coupling, for any reason, it is necessary to separate the engine and
generator. However, separating the engine and generator while they are installed in the Ground Power
Unit is VERY DIFFICULT because of the limited working space. During removal DO NOT cut any cables
or wires. Disconnect and tag them for re-assembly.
a) Separate Engine and Generator
(1) Refer to Chapter 3, Section 3 for generator assembly removal.
May 2, 2013

Dual Bearing Flexible Coupling

Coupling Assembly
Figure 1
Chapter 3-2
Page 1