SEAL 8T7194 - Caterpillar

Remove PMG Components
The permanent magnet (PMG) rotor contains strong magnets. During the removal process for the rotor, these magnets can cause a crush hazard between the rotor and the stator for the PMG. Use the proper tooling in order to remove the rotor.
The physical design of the 1400 frame, 1600 frame, and 1800 frame PMG stators are different.
Illustration 1 g01592049
1400 Frame PMG Components
(1) Rear Bracket
(2) PMG Stator
(3) PMG Rotor
(4) PMG Retaining Bolt
Illustration 2 g01592050
1600 Frame PMG Components
(6) PMG Stator Bracket
(7) PMG Stator
(8) PMG Rotor
(9) PMG Rotor Retaining Bracket
(10) Four PMG Rotor Retaining Bolts
Illustration 3 g01592051
1800 Frame PMG Components
(13) Rear Bracket
(14) PMG Stator
(15) PMG Rotor
(16) Varistor and Rectifier Leads
The PMG components can be accessed by removing some of the terminal box access panels. Refer to the "Terminal Box - Remove and Install" section of this publication if the terminal box must be removed.
Ensure that all of the PMG components and all of the wiring is properly marked or labeled before disassembly.
Disconnect the electronic controls. 1400 Frame PMG Stator Remove
Before proceeding, the position of the PMG stator must be marked (17). Illustration 4 shows one method that can be used in order to label the correct position of the PMG stator. The correct position must be known before disassembly in order to ensure that the PMG stator will be put into the correct position when the generator components are reassembled.