2006/05/15 Caterpillar


Uninterruptible Power Supply (UPS) Serviceability of the Flywheel Bearing {4480, 7551}

Usage:

UPS 250 APZ
Uninterruptible Power Supply:
UPS 1000S (S/N: CZS1-UP)
UPS 120 (S/N: CNK1-UP)
UPS 1200S (S/N: CZT1-UP)
UPS 150 (S/N: CPC1-UP)
UPS 250 (S/N: APZ1-UP; BEE1-UP; CNM1-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)

Refer to the following manuals for required maintenance information that is specific to the UPS:

  • Operation and Maintenance Manual, SEBU8144, "UPS 120, UPS 150, UPS 250 and UPS 300 Uninterruptible Power Supply"

  • Operation and Maintenance Manual, SEBU7745, "UPS 1000 and UPS 1200 Uninterruptible Power Supply"

One specified item is the Flywheel bearings. The bearings for the flywheel are required to be replaced at the following interval:

  • every 30 months

Replacing the bearings for the flywheel at the specified interval is not an "optional" service. The flywheel bearings must be replaced at the specified interval of 30 months regardless of abnormal operating parameters for replacement of the bearings. The following information is examples of abnormal operating parameters:

  • vibration

  • temperature

You are ensuring a high level of reliable service for your UPS by replacing the bearings for the flywheel at the specified interval.

This publication provides notice for approval of warranty claims regarding the UPS Flywheel bearing. For potential warranty claims regarding the UPS Flywheel bearing and any other component failure that occurs due to not performing the recommended maintenance of the Flywheel bearings, the warranty claim will be denied.

Refer to Table 1 and Table 2 for serviceable UPS flywheel bearing kits that are available.

Table 1
New Bearing Kits    
Part Number     Associated UPS Flywheel     Application Notes    
250-6647     202-9760     Used with first generation, pre 2.4 version UPS models.    
250-6648     227-7457     Used with pre 2004 production, 2.4 version UPS models.    
250-6649     244-1409     Used with new 2004 production, 3.0 version UPS models.    

Table 2
Reman Bearing Kits    
Part Number     Associated UPS Flywheel     Application Notes    
10R-2393     202-9760     Used with first generation, pre 2.4 version UPS models.    
10R-2394     227-7457     Used with pre 2004 production, 2.4 version UPS models.    
10R-2395     244-1409     Used with new 2004 production, 3.0 version UPS models.    
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