Service & Troubleshooting Guide - Home Generator System - Models 040213 & 040234 (15kW)
Section 3 - Unit Disassembly Information
Page 59
3
REMOVING THE ROTOR ASSEMBLY
The rotor assembly is held to the tapered shaft of the
engine by means of the rotor through-bolt (“Stay Shaft
Bolt”).
1. Using a wrench, break the torque on the rotor bolt
and back it out until it comes free (Fig. 71).
Fig. 71 - Removing Rotor Bolt
In order help support the weight of the rotor:
2. Re-install the rotor bolt a few threads.
NOTE
: Do not tighten the rotor through-bolt.
Allow at least two threads of space between the
nut and the end of the rotor shaft.
3. While supporting the weight of the rotor with one
hand and using a heavy, soft face dead-blow
hammer, hit the rotor on the flat surface of the
laminations until the rotor comes free of the shaft
(Fig. 72).
Fig. 72 - Removing The Rotor Assembly
INSPECTING THE ROTOR ASSEMBLY
It is not possible to check the serviceable condition of a
rotor assembly without de-soldering specific
components. The reading that is obtained by this
process (Fig. 73) only gives the resistance value of the
rotor winding.
1. Measure rotor resistance at each side of the diode
on both sides
, as shown.
Fig. 73 - Cheking Rotor Winding Resistance
It does not show if the diode or the thermal protection
device is serviceable. The only way to determine if these
components are serviceable, is to de-solder them from
the electrical circuit of the rotor assembly and check
them individually. For this reason, rotor replacement
should only be considered when all other possible faults
have been eliminated
Summary of Contents for 40213
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