HANDLE AS-DOOR 3796858 - Caterpillar

ACTION REQUIRED
Inspect the power cables for insulation damage and relocate power cables from bottom mounting point on bus work to next higher mounting point to prevent contact with system cabinet frame.
Refer to the attached Rework Procudure.
OWNER NOTIFICATION
Owners in the following countries will receive the attached Owner Notification:
US
Canada
SERVICE CLAIM ALLOWANCES
Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
100% 100% 0% 0% 0% 0%
This is a 2.0-hour job
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
EXAMPLE COPY OF OWNER NOTIFICATION
XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999
PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY RELOCATING POWER CABLES
MODELS INVOLVED - 4-WIRE UPS 250, AND UPS 500G UNINTERRUPTIBLE POWER SUPPLIES
Dear Cat Product Owner:
The existing location of the power cables from CB2 mounted to the output buswork above the K3 contactor can allow the cables to come in contact with the system cabinet frame on 4-Wire G series UPS. If the existing location of power cables allows the cables to come in contact of the system cabinet frame, it could lead to a short circuit to ground causing damage to the cable and the UPS. You will not be charged for the service performed.
Contact your local Cat dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.
If you are no longer the owner of this product(s), please contact your local Cat dealer so that our records can be updated. Please refer the dealer to their Service Letter dated 10Mar2014 when scheduling this service.
We regret the inconvenience this may cause you, but urge you to have this service performed as soon as possible to prevent unscheduled downtime.
Caterpillar Inc.
Identification #(s)
Attached to 10Mar2014 Service Letter
Rework Procedure
Power cables from CB2 are bolted to the bottom mounting points on the output bus work above the K3 contactor. Location of cables can possibly make contact with frame of system cabinet causing a short to ground. Inspect and relocate power cables from bottom mounting point on bus work to next higher mounting point to prevent contact with system cabinet frame.
Note: UPS must be shutdown prior to commencing work.
Image1.1.1
1. Shutdown UPS in accordance with Systems Operation, Testing and Adjusting, RENR9988.
Inspect assembly cables from CB2 to output bus work. Verify no wear or evidence of arcing on cables.
2. Disconnect assembly cable OUTPUT A/STATIC SWITCH CABLES from middle mounting hole on bus work.
3. Move assembly cable OUTPUT A/STATIC SWITCH CABLES up to top mounting hole on bus work. Torque connection to 45 ft-lbs
4. Repeat Steps 3 & 4 for phases B & C.
5. Disconnect assembly cable CB2/OUT A from bottom mounting hole on bus work.
6. Move assembly cable CB2/OUT A up to middle mounting hole on bus work. Torque connection to 45 ft-lbs
7. Repeat Steps 6 & 7 for phases B & C.
8. Reinspect assembly cables from CB2 to output bus work. Verify cables do not make contact with system cabinet frame.
Image1.2.1
Verifying Relocation Connections:
(UMBC option only) Remove control power fuses (T5 and T6) in I/O