21528663 Volvo.Penta Valve seat

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PRIORITY - RESISTOR NEEDS TO BE INSTALLED ON CERTAIN 3406, 3408 3412 FIRE PUMP ENGINES FOR 3T6352 ALTERNATOR TO WORK COR RECTLY - P13404 - MAILED US & CANADA, COSA, LIMITED COFA
  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-148 AU-101.1 O-90 PRIORITY 1400, 1405, 1406 PI3404 COMPLETION DATE Termination Date
January 31, 1990 July 31, 1990
Problem
The 3T6352 Alternator requires a direct positive voltage connection on its positive terminal in order to provide an output. On certain 3406, 3408, and 3412 Fire Pump Engines a resistor needs to be installed for this alternator to work correctly.
Affected Product
Model Identification Number 3406 6TB3573, 3574, 4270, 4272, 4273, 4448, 4450, 4454, 4456, 4458, 4467, 4468, 4470, 4471, 4488, 4494, 4503, 4504, 4506, 4507, 4511, 4512, 4514-4519, 4522, 4523, 4525, 4526, 4528-4530, 4532, 4533, 4539, 4548, 4551, 4564, 4567, 4569, 4571, 4572, 4574, 4576, 4578, 4592, 4593, 4595, 4598, 4601, 4605, 4611, 4614, 4616, 4620, 4621, 4627, 4632, 4633, 4637- 4639, 4642, 4644, 4648, 4654, 4666, 4668, 4670, 4681, 4720, 4725, 4729, 4756, 4762, 4773, 4777, 4786, 4799, 4826, 4829, 4862, 4868, 4910, 4913, 4916, 4917, 4948, 4978, 4979, 4985, 5010, 5016, 5017, 5019, 5022, 5026, 5028, 5030, 5034, 5036, 5044, 5046, 5056, 5085, 5114, 5119, 5133, 5143, 5167, 5177, 5229, 5241, 5242, 5246, 5256, 5283, 5296, 5306, 5307, 5312, 5328, 5343, 5356, 5415, 5420, 5459, 5460, 5470, 5499, 5504, 5507, 5542, 5548, 5608, 5614, 3408 67U11803, 12454, 12526, 12563, 12569, 12571 3412 38S13549, 13550, 13914-13916, 13931, 14030, 14036, 14037, 14060, 14065, 14104, 14124, 14146, 14151, 14173, 14176
Parts Needed
Dealers will need to order parts for this Program. 2 - 4B9762 Screw 2 - 4B2041 Nut 2 - 2H6139 Lockwasher 1 - Resistor Assembly - Consists of: 2 - 369433 Washer 1 - 7C4560 Bracket 1 - 5D8214 Resistor 1 - 8T5411 Screw 1 - 6V1668 Washer
Action Required
Drill two 3.7 mm (.144") diameter holes in the approximate location shown in Illustration 1. Install the resistor using the nuts, screws, and lockwashers listed. Connect the wires to the resistor as shown in Illustration 2 and Illustration 3. Make sure the wire labeled CB5-1-RES is connected to terminal #1 of circuit breaker CB5.
Service Claim Allowances
Caterpillar Dealer Suggested Customer Suggested Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. (C/L) (Sell) (C/L) (Sell) 100% 1 0 0 0 0 This is a 1-hour job.
Parts Disposition
Not Applicable MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE. ****** IMAGE: SEBE4098.00001.001 CAPTION: Illustration 1 ****** IMAGE: SEBE4098.00001.002 CAPTION: Illustration 2 ****** IMAGE: SEBE4098.00001.003 CAPTION: Illustration 3