CONDENSER AS 7W8126 - Caterpillar

REBE8150-01
28Mar2012
(Revised 23Jul2012)
U-167
A-140
D-151
O-161
Priority
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING THE SUPPORT LACING ON THE MAIN ROTORS ON CERTAIN 3516B, 3516C, 3516C HD, AND C175-16 GENERATOR SETS
4457 1408 PI32010
This Program must be administered as soon as possible.When reporting the repair, use "PI32010" 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 "PI32010" 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 28Mar2012 Service Letter. Changes have been made to Action Required, Service Claims Allowances, and added a Rework Procedure.
COMPLETION DATE
TERMINATION DATE
30Sep2012 31Mar2013
PROBLEM
The main rotor on certain 3516B, 3516C, 3516C HD, and C175-16 Generator Sets that are equipped with SR5, 3000 frame generators need to be inspected for the presence of proper support lacing. If proper lacing is not present, the main rotor winding leads could loosen and make contact with the main stator which may cause a failure of the generator.
AFFECTED PRODUCT
Model Identification Number
3516B PBR00667-00668
3516C SBK00900-00901, 903, 945, 947, 949, 951, 953, 995, 997-1006, 1012-1015, 1027, 1030, 1032-1039, 1043, 1125-1126
3516C HD SCK00115
C175-16 WYB00136, 138, 142-143, 145-150, 159, 170-172, 175-177, 186, 189-191, 193-196, 201-202, 204-210, 212-215, 217, 221, 231-251, 253-254, 256, 258, 260-261, 263, 267, 271, 274, 284, 286, 288-292, 294, 296, 299-300, 306, 308, 312-320, 324-325, 327-329, 334, 336, 338, 340, 344, 346-349, 355-357, 359-362, 364-365, 371, 375-377, 379, 401, 416-419, 428, 440, 490-491
WYC00123
PARTS NEEDED
No parts needed for this program
ACTION REQUIRED
1. Isolate the Generator Set before commencing any work on the unit, activate Emergency stop, open Generator Set breaker, and disconnect battery cables. Wait five minutes to insure any capacitive components in the system have de-energized before performing next steps. Ensure health and safety requirements are adhered to at all times.
2. Remove the exciter cover on generator. A metric Allen wrench set will be required for this task. Refer to Image1.
3. After the cover is removed, you should be able to view all the poles and poles leads through the bearing bracket openings.
4. Use a flashlight to inspect the rotor leads on each pole to ensure the lacing strap is present in all the poles.
5. The lacing strap with the concern is the one that secures the pole lead that cross from the top to the bottom of the coil on each individual pole. Use the following examples as a guideline for the inspection. Refer to Image2, Image3, Image4, and Image5.
Note: The main rotor lead connections with lacing is located only on non-drive end of main rotor poles.
6. Take pictures of the individual poles showing the way the rotor pole leads are secured and