96171 Mercury GASKET, CYLINDER BLOCK COVER

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PSP FOR FLUCTUATION OF LOW IDLE RPM ON CERTAIN 3406B TRUCK ENGINES - MAILED US AND CANADA, COFA, TRUCK TEPS, LIMITED COSA
  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.
U-51 AU-35 O-33.2 TT-3 1278 PS4227 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4227" as Part Number and "7755" as Group Number. Although products in the field should be administered as described above, dealers should purge parts stock immediately. Termination Date
March 31, 1989
Problem
A lever assembly in the air fuel ratio control on certain 3406B Truck Engines could cause the low idle rpm to fluctuate. New parts need to be installed to correct the problem.
Affected Product
Model Identification Number 3406B 4MG519, 521, 523, 524, 526, 528, 530-533, 539, 543, 545, 547-577, 579, 584, 586, 587, 592, 594, 597, 598, 600, 602, 604, 606, 642, 643, 645-648, 650, 651, 654, 659, 660, 663, 665, 667, 671-673, 675, 677, 679, 680, 683, 685, 686, 688, 690, 691, 693, 694, 699, 701, 704, 708-711, 713, 714, 716-719, 721, 724, 726, 3600- 3617, 3619-3626, 3628-3643, 3645-3660, 3662-3706, 3708- 3713, 3715-3725, 3728-3734, 3736-3749, 3751-3755, 3757- 3761, 3764-3767, 3769-3792, 3794-3888, 3890-3930, 3932- 3972, 3974-3982, 3984-3992, 3994-4004, 4005-4037, 4039- 4048, 4051, 4053-4170, 4172, 4174-4222, 4224-4231, 4234- 4241, 4243-4321, 4323-4363, 4365-4377, 4381, 4383, 4386- 4388, 4390, 4392-4395, 4399, 4400, 4402, 4405-4452, 4454- 4456, 4458-4468, 4470-4484, 4486-4517, 4519, 4521-4533, 4535-4562, 4564-4591, 4593-4616, 4618-4620, 4622-4646, 4649-4655, 4657-4678, 4680-4790, 4792, 4794-4803, 4805- 4839, 4842-4887, 4889-4899, 4901-4906, 4908-4937, 4939- 4957, 4959-4962, 4964, 4965, 4967-4987, 4989-5002, 5004- 5029, 5031-5075, 5077-5102, 5104-5111, 5113-5120, 5122- 5212, 5214-5219, 5221-5237, 5239-5245, 5247-5254, 5256- 5345, 5347-5388, 5390-5397, 5399-5403, 5405-5429, 5431- 5459, 5462, 5464-5475, 5477, 5479, 5480, 5482-5487, 5489- 5492, 5494-5501, 5503-5526, 5528, 5530, 5532, 5535-5537, 5544-5546, 5548, 5550, 5552, 5556-5559, 5562, 5565, 5568, 5572, 5574-5577, 5579-5581, 5583, 5585, 5587-5589, 5591, 5594, 5595, 5599-5601, 5606, 5608, 5612, 5614, 5616, 5618, 5620-5623, 5625, 5626, 5628, 5629, 5632, 5633, 5635, 5636, 5640, 5642-5645, 5647, 5652, 5656, 5670, 5681, 5683, 5780, 5809, 5936, 5957, 5978, 6027, 6046, 6058, 6071, 6136, 6146, 6161, 6242, 6287, 6300, 6308, 6319, 6329, 6332, 6344, 6346, 6368, 6384, 6414, 6417- 6419, 6421-6423, 6425, 6428, 6429, 6433, 6439, 6440, 6441, 6466, 6488, 6552-6554, 6556, 6560, 6564, 6568, 6573, 6576, 6742, 6749, 6751, 6756, 6757, 6761, 6766, 6819, 6831, 6956, 6962, 6963, 6989, 7016, 7047, 7053, 7127, 7141, 7145, 7170, 7308, 7309, 7312, 7315, 7317, 7319, 7321, 7323, 7327, 7332, 7414, 7423, 7432, 7445, 7459, 7468, 7478, 7481, 7501, 7530, 7571, 7664, 7803, 7844, 7846, 7852, 7865, 8205, 8644, 8657, 8733, 8735, 8739, 8785, 8913, 8942, 9083, 9217, 9368, 9475, 10132, 10139, 10166, 10448, 10514, 10666 7FB87207, 90388, 91217, 91544, 91545, 91547, 91552, 91554, 91558, 91563, 91564, 91566, 91572,