CAP AS-FILLER 1018909 - Caterpillar

REBE1393-01
07Jun2007
(Revised 29Jun2007)
D-206
O-222
Priority
PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 247-0308 GENERATOR SET COUPLING ON CERTAIN G3520C GENERATOR SETS WHEN THE MAXIMUM AMBIENT TEMPERATURE NEAR THE DAMPER GROUP IS LESS THAN 50C.
4450 3252 4456 PI31280
This Program must be administered as soon as possible.When reporting the repair, use "PI31280" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Codeand "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31280" as the Part Number, "7751" as the Group Number,"96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
The information supplied in this service letter may not be valid after the termination date of this program.Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
This Revised Service Letter replaces the June 7, 2007 Service Letter. Changes have been made to the parts required and the DTF code.
COMPLETION DATE
TERMINATION DATE
31Dec2007 30Jun2008
PROBLEM
The existing Generator Set Coupling 247-0308 can get damaged because of excessive torsional vibration levels.
AFFECTED PRODUCT
Model Identification Number
G3520C CWW00265-00267, 271-276, 278-282, 287-301
GZN00211-00217, 221-226, 228, 230, 233-246, 249
PARTS NEEDED
Qty
Part Number Description
8 4M6953 WASHER-HARD
1 2490059 COUPLING-INNER
1 2968049 COUPLING-OUTER
ACTION REQUIRED
Prior to performing this update, the ambient air temperature around the damper must be measured or known. Measure the ambient air temperature within 3-6 inches of the front face of the damper guard at the 12, 3, 6, and 9 o'clock positions. The average ambient air temperature should not exceed 50C at full rated conditions. Temperature measurements should be taken only after the engine and surrounding temperatures have stabilized over an 8-10 hour period.
For customer sites with higher than 50C ambient air temperature around the damper, the customer must improve the air flow around the damper, or reduce the overall air temperature in the engine room. The air temperature around the damper should be measured again, as explained above, whenever system changes are made. If the air temperature around the damper cannot be reduced below 50C, pleae work through your Dealer Technical Communicator to contact the DSN (Dealer Solution Network) for availability of options to compensate for high ambient temperature conditions. Do not proceed with implementation of this Service Letter until ambient conditions are reduced below 50C, or if a component option is approved.
Changes in the outside ambient air temperature will affect the air temperature around the damper. If the outside ambient air temperature is below the maximum expected temperature for your region, then the difference between the maximum expected outside ambient temperature and the current outside ambient air temperature must be added to the air temperature measured around the damper. This adjusted temperature value will represent the maximum ambient air temperature expected around the damper when the outside ambient air temperature reaches the maximum expected level.
If the ambient temperature around the damper is less than 50C, proceed with the attached rework procedure to complete the requirements of this service letter.
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OWNER NOTIFICATION
U.S. and Canadian owners will receive the attached Owner Notification.
SERVICE CLAIM ALLOWANCES
Caterpillar Dealer Suggested Customer Suggested
Parts