2013/03/12 Caterpillar


Bearing Service Interval Is Extended for Certain Uninterruptible Power Supplies {4480, 7551}

Usage:

UPS 250 APZ
Uninterruptible Power Supply:
UPS 1000Z (S/N: EDZ1-UP)
UPS 120 (S/N: CNK1-UP)
UPS 1200Z (S/N: HDR1-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)
UPS500G (S/N: TYD1-UP)
UPS600G (S/N: DLD1-UP)
Engine News SEBD9782, 16 May 2012, " Bearing Service Interval Is Extended for Certain Uninterruptible Power Supplies {4480, 7551} SMCS - 4480; 7551". Disregard the information in the article that is listed above. Refer to the information in the following article.

The recommended service life for Flywheel UPS is changed from 36 months to 48 months for all products equipped with the 3.5 EVD load cell bearing design.

Analysis of the current field population of Flywheel UPS units is allowed for the increase in recommended bearing service intervals from 36 months to 48 months.

For units which are equipped with previous bearing designs, must first upgrade to the 3.5 EVD bearing design by utilizing one of the following upgrade kits:

  • 347-6649 Bearing Kit for Pre 2.4/2.4 EVD to 3.5 EVD conversion.

  • 10R-9600 Bearing Kit for Remanufactured Pre 2.4/2.4 EVD to 3.5 EVD conversion.

  • 347-6648 Bearing Kit for Pre 3.0 EVD to 3.5 EVD conversion.

  • 10R-9599 Bearing Kit for Remanufactured Pre 3.0 EVD to 3.5 EVD conversion.

No need to replace the bearings without 3.5 EVD, that are currently in service and still have time remaining before the required maintenance.

An upgrade kit can be installed at the next bearing change and the 48 month interval will begin.

The firmware in the unit should be updated to the most recent version found on SIS web Firmware can be downloaded from the "Downloads" link on https://sis.cat.com. Once the update is complete, the bearing change interval in the firmware can be changed to 48 months and the UPS will calculate the new replacement date from the last service.

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