TUBE AS 3597700 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR OIL OVER CARRY ON CERTAIN 3208 INDUSTRIAL ENGINES - MAILED US AND CANADA
  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-50 1074 PS4222 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 "PS4222" as Part Number and "7755" as Group Number. Termination Date
March 31, 1989
Problem
Certain 3208 Industrial Engines when used in snow groomers which operate on steep slope may experience an oil carry over problem. An additional PCV valve needs to be added to improve crankcase ventilation.
Affected Product
Model Identification Number 3208 3Z3998, 3999, 4001, 4002, 4004, 4006, 4008, 4009, 4012, 4014, 4074, 4081, 4084, 4089, 4091, 4095, 4115, 4116, 4120, 4123, 4130, 4132, 4136, 4138, 4141, 4143, 4195, 4201, 4209, 4212, 4217, 4220, 4270, 4273, 4278, 4280, 4285, 4287, 4291, 4296, 4304, 4306, 4308, 4312, 4314, 4316, 4320, 4321, 4340, 4341, 4561, 4564-4566, 4568-4570, 4573-4575, 4590-4595, 4597-4599, 4602, 4683-4686, 4689, 4690, 4692-4696, 4751, 4752, 4754, 4756, 4759, 4760, 4764, 4766, 4777, 4787, 4789, 4792, 4794, 4798, 4803, 4809, 4827, 4829, 4832, 4835, 4844, 4846, 4849, 4850, 4858, 4873-4875, 4877-4880, 4893, 4897, 4908, 4921, 4925, 4935, 4946, 4949, 5270, 5272, 5278, 5281, 5287, 5299, 5301, 5303, 5305-5308, 5310, 5314, 5315, 5317-5319, 5321, 5322, 5324, 5432, 5434, 5540, 5542, 5567, 5625, 5776, 5781, 5788, 5792, 5799, 5804, 5810, 5814, 5819, 5826, 5905, 5909, 5914, 5917, 5923, 5928, 5937, 5938, 5947, 5948, 6021, 6025, 6030, 6034, 6039, 6043, 6051, 6053, 6058, 6060, 6121, 6124, 6127, 6131, 6134, 6140, 6143, 6146, 6148, 6153, 6165, 6166, 6168, 6169, 6171, 6173, 6177, 6179, 6181, 6182
Parts Needed
1 - 7C6353 Valve Assembly 2 -