2008/11/24 Caterpillar

Uninterruptible Power Supply:

UPS 300 (S/N: CNJ1-UP)

UPS 1200S (S/N: CZT1-UP)

UPS 300 (S/N: CPZ1-UP)

ES12F (S/N: CZE1-UP)

UPS 1000S (S/N: CZS1-UP)

UPS 120 (S/N: CNK1-UP)

UPS 150 (S/N: CPC1-UP)

UPS 250 (S/N: BEE1-UP; CNM1-UP; APZ1-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)

Description of Change: Bearing life on most UPS units is approximately 30 months if the units are maintained to the current standards. An option is now available to increase the service intervals from 30 months to 36 months.

Adaptable To: The service intervals for the bearings can be increased for all UPS products that are equipped with load cell bearings that use the 243-3675 Bearing Assembly or the 227-7461 Bearing Assembly for the bottom bearing.