GASKET 7C2144 - Caterpillar

Uninterruptible Power Supply: UPS 120 (S/N: CNK1-UP) UPS 150 (S/N: CPC1-UP) UPS 250 (S/N: CNM1-UP; APZ1-UP) UPS 300 (S/N: CNJ1-UP; CPZ1-UP) UPS 301 (S/N: CSY1-UP) UPS 500 (S/N: CSE1-UP) UPS 600 (S/N: CTX1-UP) UPS 750 (S/N: CPM1-UP) UPS 900 (S/N: CRY1-UP)Introduction
The following Special Instruction will describe the procedure that is required in order to convert the Uninterruptible Power Supply (UPS) from a G3.0 load cell to a G3.5 load cell.Important Safety Information
Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, a work method or operating technique that is not specifically recommended by Caterpillar is used, you must ensure that it is safe for you and for other people to use.You should ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance or the repair procedures that are used.Parts Information
Table 1
Part Number     Description     Qty    
7M-7456     Bearing Mount Compound     1    
190-8380     Shim Kit     1    
6V-2055     Grease     1    Required Tools
Table 2
Part Number     Description     Qty    
191-5217     Guide Pin     2    
190-8379     Bearing Installer Gp     1    Retrofit Procedure
Illustration 1 g01927518
(1) Screw for Rotor Position Sensor (2) Rotor Position Sensor (3) O-ring for Rotor Position Sensor (4) Retaining Bolt for Rotor (5) Serrated Rotor Wheel (6) Bearing Bolt (7) Upper Bearing Cartridge (8) Hex Plug (9) Shim Pack (10) O-ring (11) Flywheel Housing (12) Lower Bearing Cartridge (13) Rotor Retainer (14) Polished Retaining Bolt for Rotor (15) Load Cell (16) Screws for Load CellThe bearings should be replaced periodically. The recommended interval is estimated at 2 and 1/2 years. The bearings are contained in removable cartridges. The cartridges are replaced at the same time as the bearings. The cartridges must be accurately positioned for proper operation. Only trained personnel may perform the replacement.Note: The lower bearing and upper bearing are always changed as a set. The lower bearing is changed first. Then, the upper bearing is changed. The flywheel must be de-energized and the flywheel must be at zero rpm.Note: Shut down the system before attempting to remove the lower bearing. Refer to the Operation and Maintenance Manual,, "System Shutdown" for the proper shutdown procedure.Firmware Requirements
All firmware must