811612A 1 Mercury O-RING KIT

14Oct2020
U-608
A-500
D-571
O-561
TM-8
Before/After
PRODUCT SUPPORT PROGRAM FOR REPLACING SEA WATER CIRCUIT HOSE CLAMPS ON CERTAIN C18 MARINE ENGINES
1380 PS46890
Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.
This Program must be administered either before or after failure.In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS46890" as the Part Numberand "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code.If administered after failure, use "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.
TERMINATION DATE
31Oct2022
PROBLEM
The existing hose clamps on the sea water hose from the auxiliary water pump can fail on certain C18 Marine Engines. If the existing clamps fail, it will lead to loss of clamping force on the hose, which may result in sea water leaks.
AFFECTED PRODUCT
Model Identification Number
C18 JLE05206-05207, 5213, 5215-5216, 5219, 5221-5222, 5227, 5231-5233, 5236, 5240, 5244, 5247, 5250-5251, 5253, 5256, 5259-5260, 5265-5266, 5270-5272, 5276, 5278, 5283-5285, 5291, 5295, 5301, 5305, 5307, 5309, 5312-5313, 5318-5319, 5324, 5326, 5329-5331, 5338-5339, 5341, 5343, 5345-5346, 5349, 5355, 5358-5366, 5370, 5372, 5375-5376, 5379, 5381, 5383, 5386, 5388-5392, 5397, 5400-5403, 5406, 5408-5409, 5412-5413, 5415-5416, 5422-5425, 5427, 5430-5432, 5437-5439, 5442-5444, 5449-5450, 5454-5460, 5462-5469, 5471, 5476, 5478-5479, 5485, 5489-5491, 5494, 5496-5497, 5499, 5501-5503, 5505, 5507-5513, 5517, 5519-5521, 5523, 5525, 5528, 5532, 5535-5536, 5538, 5542, 5546, 5549-5551, 5553-5557, 5559-5560, 5564, 5568-5573, 5575-5583, 5585, 5587-5593, 5596, 5598-5600, 5602, 5605-5606, 5614, 5617, 5622-5624, 5630, 5633, 5635-5637, 5639, 5643-5644, 5646, 5649, 5651, 5654, 5656, 5658-5660, 5662, 5666-5668, 5671-5672, 5674, 5677-5678, 5680, 5684-5687, 5689, 5692-5693, 5695, 5699-5700, 5702-5703, 5706-5709, 5711-5713, 5716, 5719-5721, 5723-5724, 5727-5730, 5732-5733, 5736-5741, 5743, 5745-5746, 5748-5750, 5752-5759, 5761-5764, 5766, 5769-5783, 5785-5789, 5791, 5797, 5801-5814, 5816, 5818-5824, 5827, 5829-5831, 5834-5860, 5864, 5866-5880, 5882-5888, 5890-5892, 5894, 5896-5919, 5922-5924, 5926, 5928-5950, 5952-5955, 5957-5963, 5966-5967, 5969-5973, 5976-6020, 6022-6037, 6039-6045, 6047-6096, 6098-6291
PARTS NEEDED
Qty
Part Number Description
4 2955550 CLAMP-T'BOLT SPR
12 3718946 HOSE BK
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 7% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
Note: Take the necessary actions to contain any sea water that may leak when the hose is removed.
1. Refer to Image 1. Loosen clamp assembly (2). Remove the clamps (3) and hose (4).
2. Loosely install four new 295-5550 hose clamps, in the orientation as shown in Image 2, over a length of 115 ? 5 mm (4.53 ? 0.20 in) of 371-8946 Hose (4).
3. Install the hose on the pump outlet elbow (1) and the aftercooler inlet bonnet (5). Make sure the elbow (1) is aligned with the bonnet (5). Tighten the clamp assembly (2) to a torque of 20 ? 5 N?m (15 ? 4 lb ft).
4. Using the tightening sequence as shown in Image2, tighten the 295-5550 Hose Clamps to 5 N-m (44 lb-in).
5. Ensure that the sea water system has the proper prime.