2004/05/01 Caterpillar


UPS Flywheel Bearing Serviceability {7551}

Usage:

UPS 250 APZ


Uninterruptible Power Supply:
UPS 250 (S/N: BEE1-UP; CNM1-UP; APZ1-UP)
UPS 300 (S/N: CNJ1-UP; CPZ1-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)
UPS301 (S/N: CSY1-UP)

When the UPS Flywheel bearings are replaced, you are required to replace both the upper and lower bearing assemblies. The serviceability history of the Flywheel bearings required the dealer to order two individual bearing assemblies. Each bearing assembly has a different part number. This method of serviceability allowed problems to occur. One problem involved sending one correct bearing assembly and one incorrect bearing assembly to the dealer. The other problem would involve a shortage of inventory of either the Upper or Lower bearing assembly.

To prevent the reoccurrence of the problems listed above, the serviceability of the UPS Flywheel bearing assemblies have been corrected. A single Caterpillar part number has been provided for each version of the UPS Flywheel. The individual part numbers will provide the dealer with the correct upper and lower bearing assemblies. The serviceable UPS Bearing Kits will ensure that the dealer receives a matched set of bearings for the version of UPS Flywheel that needs to be serviced.

The following tables list the 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 the 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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