RING-SNAP 4M6990 - Caterpillar

Caterpillar: Confidential Yellow
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 Program must be administered as soon as possible. When reporting the repair, use "PI3879" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3879" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
Completion Date
December 31, 1996Termination Date
June 30, 1997Problem
Low oil pressure shutdowns are occurring on 3512 and 3516 Generator Set Engines equipped with EMCP II and a 35 Amp alternator. This occurs at start-up when the oil pressure exceeds the range of the sensor. Noise generated on the oil pressure signal line can cause an inaccurate low oil pressure reading by the Generator Set Control even though the engine has high oil pressure.
Affected Product
Model & Identification Number
3512 (24Z5385, 24Z5393, 24Z5394, 24Z5402, 24Z5404, 24Z5419, 24Z5421, 24Z5425 , 24Z5428, 24Z5431, 24Z5433, 24Z5438-5440, 24Z5446, 24Z5465, 24Z5475 , 24Z5480, 24Z5484-5486, 24Z5489, 24Z5500-5503, 24Z5505, 24Z5519 , 24Z5521, 24Z5529, 24Z5550, 24Z5551, 24Z5566, 24Z5573, 24Z5578, 24Z5582 , 24Z5585, 24Z5586, 24Z5590, 24Z5593, 24Z5594, 24Z5596-5598, 24Z5601-5603 , 24Z5605, 24Z5611-5613, 24Z5615, 24Z5616, 24Z5631-5635 , 24Z5640, 24Z5651, 24Z5652, 24Z5656, 24Z5671, 24Z5673, 24Z5674 , 24Z5680, 24Z5685, 24Z5687, 24Z5690, 24Z5694, 24Z5697, 24Z5702, 24Z5706-5708 , 24Z5712, 24Z5720, 24Z5722, 24Z5723, 24Z5728, 24Z5750, 24Z5755 , 24Z5759, 24Z5760, 24Z5766-5768, 24Z5770-5772, 24Z5774, 24Z5776 , 24Z5778-5780, 24Z5783, 24Z5785, 24Z5787, 24Z5789-5791, 24Z5795 , 24Z5796, 24Z5813, 24Z5826, 24Z5830, 24Z5831, 24Z5855, 24Z5858, 24Z5859 , 24Z5871, 24Z5885, 24Z5886, 24Z5890, 24Z5914, 24Z5929, 24Z5931, 24Z5937 , 24Z5942, 24Z5946, 24Z5948-5950, 24Z5953, 24Z5956, 24Z5969, 24Z5973 , 24Z5980, 24Z5984, 24Z5986, 24Z5988, 24Z5990, 24Z5991, 24Z5996, 24Z5998-6000 , 24Z6002-6202, 24Z6004-6008, 24Z6010, 24Z6015, 24Z6033 , 24Z6035, 24Z6044, 24Z6045, 24Z6055-6060, 24Z6062, 24Z6063, 24Z6066-6068 , 24Z6070, 24Z6073, 24Z6074, 24Z6079, 24Z6082, 24Z6084, 24Z6087 , 24Z6091, 24Z6095, 24Z6106, 24Z6111, 24Z6117, 24Z6127, 24Z6128, 24Z6135 , 24Z6140, 24Z6143, 24Z6144, 24Z6152, 24Z6153, 24Z6167, 24Z6168, 24Z6171-6173 , 24Z6177, 24Z6185, 24Z6186, 24Z6192, 24Z6203, 24Z6209, 24Z6211 , 24Z6228, 24Z6229, 24Z6231, 24Z6233, 24Z6234, 24Z6238, 24Z6241-6245 , 24Z6247, 24Z6248, 24Z6251, 24Z6252, 24Z6255-6258, 24Z6260 , 24Z6264, 24Z6266, 24Z6267, 24Z6270, 24Z6279, 24Z6288, 24Z6291, 24Z6298 , 24Z6299, 24Z6303, 24Z6304, 24Z6308, 24Z6313, 24Z6317-6319, 24Z6322 , 24Z6323, 24Z6331, 24Z6333, 24Z6338, 24Z6343-6346, 24Z6351, 24Z6355 , 24Z6361, 24Z6362, 24Z6365, 24Z6366, 24Z6370-6375, 24Z6380, 24Z6382 , 24Z6384-6389, 24Z6392-6395, 24Z6398, 24Z6410, 24Z6415, 24Z6420 , 24Z6421, 24Z6423, 24Z6444, 24Z6465, 24Z6481, 24Z6487, 24Z6488, 24Z6495 , 24Z6501, 24Z6505, 24Z6507, 24Z6509, 24Z6513, 24Z6520, 24Z6525, 24Z6530 , 24Z6531, 24Z6544, 24Z6559, 24Z6560, 24Z6567, 24Z6569, 24Z6571, 24Z6573 , 24Z6574, 24Z6576, 24Z6578, 24Z6582-6584, 24Z6586-6589, 24Z6591 , 24Z6598, 24Z6600, 24Z6605, 24Z6612, 24Z6647, 24Z6648, 24Z6657-6661 , 24Z6663-6665, 24Z6667-6669, 24Z6671-6678, 24Z6682 , 24Z6684-6686, 24Z6690, 24Z6691, 24Z6697, 24Z6702, 24Z6715-6718 , 24Z6722-6724, 24Z6728, 24Z6733, 24Z6734, 24Z6744, 24Z6758-6760 , 24Z6783, 24Z6785, 24Z6786, 24Z6797-6799, 24Z6801, 24Z6806 , 24Z6810-6812, 24Z6817, 24Z6825-6832, 24Z6834, 24Z6836-6840 , 24Z6844-6846, 24Z6848, 24Z6850, 24Z6851, 24Z6853-6856 , 24Z6859, 24Z6864, 24Z6865, 24Z6869, 24Z6870, 24Z6876, 24Z6877