PRODUCT SUPPORT PROGRAM FOR REPLACING THE BUCKET CYLINDER GROUP ON CERTAIN 312C EXCAVATORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE BUCKET CYLINDER GROUP ON CERTAIN 312C EXCAVATORS

Usage:

REBE4426-00

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28Jan2009

U-35

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE BUCKET CYLINDER GROUP ON CERTAIN 312C EXCAVATORS
5457		PS51620

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NOTE:

This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS51620" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

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NOTE:

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.

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TERMINATION DATE

31Jan2011

PROBLEM

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The piston locknuts in the bucket cylinder may become loose on certain 312C Excavators. The piston locknuts loosening may be caused by a design problem and insufficient torque.

AFFECTED PRODUCT

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Model	Identification Number
312C	CAE00095, 181, 301, 337, 476, 569, 589, 700, 741, 936, 995, 1262, 1313, 2556 FDS00079, 86, 91, 96, 109, 118, 150, 335, 421, 470, 555
312C L	CBA00029, 31-44, 46-71, 74-112, 114-120, 122-151, 153-193, 199-204, 207-208, 210-231, 233-257, 260-272, 274-278, 281-282, 284-288, 290-312, 318-319, 321-343, 345-366, 368-374, 376-394, 397-406, 408, 410-415, 417, 419-422, 424-425, 427-428, 431-436, 438-449, 451-475, 477-587, 589-634, 637-639, 642-653, 655-677, 679-686, 688-689, 691-701, 704-705, 707-716, 718-719, 721-725, 727-728, 730-732, 734-737, 739-756, 758-766, 768-770, 772-775, 777, 779, 781-813, 815-820, 822-824, 826-837, 839-857, 859-865, 867-881, 883-884, 1201-1206, 1209-1228, 1230-1246, 1248-1304, 1306-1376, 1378-1420, 1422-1433, 1435-1440, 1442, 1444-1451, 1453-1456, 1461-1483, 1486-1488, 1492-1495, 1497-1500, 1502-1516, 1518-1519, 1521-1531, 1535-1538, 1540-1541, 1546-1549, 1551-1592, 1594-1599, 1602-1604, 1607-1678, 1680-1681, 1683-1705, 1707, 1709-1711, 1714-1727, 1729-1735, 1737-1746, 1748-1751, 1756-1817, 1819-1829, 1831-1834, 1836-1838, 1840-1858, 1861-1862, 1864-1865, 1867-1870, 1872, 1874, 1878-1880, 1882-1884, 1886-1890, 1892, 1894-1927, 1929-1967, 1969-1972, 1974-2017, 2020-2042, 2044-2072, 2075-2077, 2079-2082, 2084-2093, 2097, 2099-2100, 2102-2118, 2120-2189, 2191-2192, 2194-2212, 2214-2219, 2224-2226, 2230-2233, 2235-2255, 2257-2263, 2265-2278, 2280-2282, 2284-2310, 2312-2327, 2330-2337, 2339-2342, 2344-2345, 2347-2351, 2353-2417, 2419, 2421-2428, 2430-2442, 2444-2460, 2462, 2465-2468, 2470, 2472-2487, 2489-2493, 2495, 2497-2500, 2502-2504, 2506-2509, 2511-2513, 2516-2529, 2532-2570, 2573-2576, 2579-2581, 2583, 2585, 2587, 2589-2590, 2592-2622, 2624-2673, 2677-2743, 2745-2760, 2763-2767, 2770, 2772-2780, 2782-2811, 2813-2816, 2818-2864, 2866, 2870-2884, 2889-2912, 2915-2922, 2924-2961, 2966, 2968-2995, 2997-2998, 3000-3006, 3008-3011, 3013, 3015-3022, 3024-3029, 3032, 3034-3049, 3051, 3053-3054, 3057-3100, 3102-3104, 3107-3128, 3132-3156, 3160-3164, 3166-3212, 3214-3233, 3237-3238, 3240-3260, 3262-3264, 3268-3279, 3281-3324, 3326-3346, 3354, 3356, 3358-3368, 3370, 3372-3395, 3397-3398, 3400, 3402-3403, 3406, 3408-3425, 3439-3450, 3452-3488, 3492-3512, 3515-3530, 3532-3534, 3542, 3544-3546, 3548-3576, 3578-3583, 3591, 3593-3602, 3604-3655, 3659-3670, 3672-3713, 3715-3745, 3749, 3751-3752, 3754-3759, 3761-3817, 3820, 3822-3843, 3845, 3848, 3850, 3852-3853, 3859-3863, 3866-3876, 3879-3921, 3928, 3930-3939, 3941-3942, 3945-3946, 3949, 3952-3953, 3955-3958, 3960-3961, 3963-3981, 3983-3987, 3989, 3993, 4023, 4026-4028, 4030-4031, 4035-4041, 4051-4052, 4067, 4073-4083, 4086-4120, 4122, 4124-4130, 4132-4140, 4144, 4149, 4151-4164, 4166-4176, 4178-4182, 4185, 4187, 4189, 4192-4206, 4208-4209, 4211-4222, 4224-4227, 4234-4236, 4239-4242, 4244-4247, 4257, 4261, 4264-4298, 4307, 4309-4315, 4322, 4325, 4349, 4367-4370, 4372-4388, 4390, 4394-4404, 4406, 4409, 4411, 4413-4418, 4420-4433, 4435-4440, 4448-4449, 4451-4453, 4455, 4459-4464, 4476-4477, 4499, 4501, 4503-4504, 4512, 4520, 4527, 4533, 4537-4539, 4546-4550, 4552-4555, 4561, 4577, 4585, 4587-4589, 4594, 4613-4616, 4618, 4620-4621, 4625, 4629, 4635, 4638-4643, 4645, 4647, 4649-4650, 4653-4654, 4663-4664, 4666, 4668-4669

PARTS NEEDED

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Qty	Part Number	Description
2	3B8489	FITTING
2	1661492	SEAL-LIP TYPE
2	2357679	SEAL-LIP TYPE
1	2897699	CYL GP-0100 0939
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 3% 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

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If the cylinder piston lock-nut has loosened, replace with a new bucket cylinder group. Refer to the attached Rework Procedure.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-5000 hrs, 0-36 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%

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NOTE: This is a 14.0-hour job

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PARTS DISPOSITION

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Handle the parts in accordance to your Warranty Bulletin on warranty parts handling.
Scrap all parts completely.

Rework Procedure

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NOTE: Refer to Disassembly and Assembly Manual, RENR5503, for instructions on removing, disassembly, assembly, and installing the cylinder.

1. Release the hydraulic system pressure.
2. Remove the bucket cylinder assembly.
3. Install the 166-1492 and 235-7679 Lip Seals and 3-8489 Fitting into the 289-7699 Cylinder Group. Refer to Image 1.1.1.
4. Install the new bucket cylinder group.
5. Clean the hydraulic system oil until the cleanliness factor of the hydraulic system oil meets ISO 18/15 requirements.