PRODUCT SUPPORT PROGRAM FOR REPLACING THE CLUTCH SHAFT ASSEMBLY IN THE POWERSHIFT TRANSMISSIONS ON CERTAIN 420E, 430E, 432E, 434E, 442E, 444E, AND 450E BACKHOE LOADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE CLUTCH SHAFT ASSEMBLY IN THE POWERSHIFT TRANSMISSIONS ON CERTAIN 420E, 430E, 432E, 434E, 442E, 444E, AND 450E BACKHOE LOADERS

Usage:

REBE4349-00

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10Nov2008

U-566

A-471

D-483

O-521

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*After Failure Only*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE CLUTCH SHAFT ASSEMBLY IN THE POWERSHIFT TRANSMISSIONS ON CERTAIN 420E, 430E, 432E, 434E, 442E, 444E, AND 450E BACKHOE LOADERS
3030 3053 3063		PS51587

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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 "PS51587" 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

30Nov2010

PROBLEM

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The existing 2nd/3rd clutch shaft assembly used in the powershift transmission may crack on certain 420E, 430E, 432E, 434E, 442E, 444E, and 450E Backhoe Loaders. If the existing shaft assembly cracks oil can leak into the clutch piston cavity causing the clutch to partially engage. This will cause the clutch to fail. If the existing shaft assembly cracks, it can be replaced with an updated shaft assembly.

AFFECTED PRODUCT

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Model	Identification Number
420E	HLS00217, 256, 281, 295, 297, 339, 342, 358, 371, 374, 382, 393, 395-397, 400, 409, 426, 444, 460, 462, 470, 476, 522-523, 616, 670, 679, 686, 700, 745, 821, 846, 852, 929, 957, 984, 996, 1020, 1023, 1031, 1036, 1039-1040, 1043, 1045, 1049, 1064, 1072-1073, 1081, 1083-1084, 1131, 1137-1138, 1142, 1155, 1172, 1184, 1189, 1208-1209, 1217, 1219, 1221-1222, 1231, 1247, 1253, 1270, 1331, 1390, 1419, 1469, 1472, 1478, 1493, 1499, 1508, 1523, 1532, 1585, 1591, 1596, 1604, 1628, 1641, 1656, 1663, 1684, 1710, 1732-1733, 1769, 1797, 1801, 1818, 1820, 1846, 1859, 1868, 1947, 1968, 1974, 1976, 1978, 1982-1984, 1997, 1999, 2024, 2043, 2045, 2051, 2054, 2058, 2060, 2079, 2089, 2111, 2249, 2304, 2314, 2324, 2363, 2374, 2382, 2395, 2410, 2420, 2423, 2442-2444, 2446, 2471-2474, 2478, 2481, 2483, 2488-2489, 2493, 2496, 2503, 2507, 2514, 2524, 2537, 2543, 2547, 2561, 2564, 2569, 2580, 2583-2584, 2608, 2611, 2626, 2633, 2641, 2643, 2648, 2655, 2660, 2672, 2683, 2686, 2699, 2721, 2730-2732, 2736, 2774, 2790, 2793, 2795, 2802, 2809-2810, 2818, 2833, 2835-2837, 2839-2840, 2842, 2848, 2850, 2854, 2875, 2879, 2881, 2887, 2897, 2900, 2909, 2921, 2923, 2928, 2933, 2936, 2946, 2950-2951, 2957, 2959-2960, 2962, 2964-2965, 2967, 2970, 2972, 2974, 2983, 2985, 2990, 2996, 3007, 3010, 3013, 3017, 3027, 3033, 3038, 3040, 3045, 3064, 3071, 3073, 3078, 3081, 3083, 3085, 3088, 3109, 3116-3117, 3121, 3161, 3184, 3193, 3212, 3224, 3230, 3266, 3340, 3350, 3356, 3376, 3431, 3467, 3487, 3496, 3516, 3527-3528, 3531, 3546, 3556-3558, 3562, 3580, 3623, 3628, 3630, 3652, 3677, 3682, 3689-3690, 3697, 3699, 3701-3702, 3708, 3711, 3718, 3722, 3737-3738, 3740, 3755, 3785, 3805, 3852, 3864, 3879, 3886, 3913-3914, 3916, 3926, 3931, 3933, 3936, 3947, 3949, 3953, 3964, 3991, 4022-4023, 4041, 4048, 4051, 4065, 4068-4069, 4074, 4077, 4083, 4085, 4099, 4118, 4134, 4147, 4151, 4154, 4202, 4220, 4241, 4247-4248, 4251-4252, 4256, 4282, 4344, 4473, 4486, 4488, 4494-4495, 4501, 4503, 4528, 4537, 4557, 4560, 4567, 4588-4592, 4594, 4601, 4651, 4654, 4665, 4686, 4729-4730, 4761-4763, 4765, 4768, 4775, 4779, 4815, 4872, 4875, 4877, 4882, 4886-4888, 4894, 4896, 4900, 4903-4904, 4908-4910, 4914, 4942, 4948, 4966, 5064, 5084, 5086, 5119-5120, 5125, 5129, 5165-5166, 5169, 5175, 5178, 5191, 5197-5199, 5369, 5381, 5384, 5399, 5401, 5404, 5408, 5411-5412, 5448, 5457, 5459, 5478, 5484-5485, 5487-5488, 5492, 5503, 5507, 5523, 5525, 5527-5528, 5532-5533, 5545, 5549, 5551, 5645, 5701, 5753, 5768, 5772, 5777, 5822, 5846, 5849, 5870, 5873, 5877, 5884, 5886-5887, 5891, 5895, 5901-5902, 5904, 5909, 5915, 5918, 5929, 5973, 6013, 6021, 6033, 6166, 6178, 6200, 6235, 6253, 6258, 6284, 6354, 6356, 6362-6364, 6366, 6377, 6492, 6495, 6516, 6519-6520, 6550, 6554, 6558-6559, 6561, 6582, 6593, 6619, 6674-6675, 6702-6703, 6728, 6731, 6739, 6758, 6779-6780, 6787, 6805, 6833, 6847, 6859, 6975, 6987-6988, 6998, 7002, 7008-7009, 7017, 7023, 7031, 7038, 7040, 7045, 7049, 7219-7220, 7222, 7272, 7277, 7310, 7342, 7346, 7348-7349, 7355, 7359, 7365-7367, 7415, 7419, 7422, 7427, 7433-7434, 7462, 7464, 7478, 7518-7519, 7521-7522, 7566, 7585-7587, 7598, 7604, 7608, 7636, 7695-7696, 7720, 7724, 7726-7728, 7734, 7740 KMW00156-00157, 159, 167-178, 180-185, 187-195, 197-200, 219-221, 224-225, 227, 231-236, 242, 244, 250-251, 257, 259-260, 264, 266, 271-274, 279, 287, 290, 292-293, 299, 318, 329, 350-351, 360, 364-365, 382, 398-399, 401, 440, 444-445, 452-453, 455, 459, 461-464, 467-469, 473, 475, 479, 486, 489-490, 493, 496-497, 500, 515, 536, 550, 553, 555-556, 565, 567, 583, 585, 587, 589-590, 593-594, 599-600, 605-607, 609, 612, 618, 625-626, 637, 643-644, 665, 672, 690, 696, 701, 719, 726, 728, 730, 742, 759-760, 769, 782, 789, 797, 805, 808, 810-812, 818-821, 823, 825-826, 829, 831, 836, 839, 843, 845, 847-848, 850-851, 853-854, 857, 863, 866, 868, 871-872, 874, 882-884, 886, 890, 892, 894-895, 897-899, 901, 906-908, 911, 913-914, 916, 920-921, 923, 927, 949, 972, 974, 976-977, 981-982, 1004, 1021, 1028, 1030, 1041, 1049-1050, 1054, 1056-1057, 1063, 1066-1067, 1072, 1078-1079, 1083, 1087, 1092, 1095, 1105-1106, 1108, 1111-1112, 1116-1117, 1127, 1129, 1134, 1138, 1141, 1148, 1158, 1161, 1164, 1168-1169, 1175-1177, 1180-1182, 1187-1188, 1191, 1195, 1206, 1212, 1216, 1219, 1221, 1225-1226, 1234, 1238-1239, 1241, 1251, 1254, 1264-1265, 1268, 1273-1276, 1279-1282, 1289, 1291-1293, 1297, 1299-1301, 1303-1304, 1309, 1313-1317, 1319-1321, 1323, 1326, 1335, 1342-1344, 1346, 1350-1356, 1358, 1360-1362, 1364, 1367, 1370-1371, 1374, 1377-1378, 1381-1383, 1386-1387, 1395-1396, 1400-1402, 1405, 1407, 1409, 1414, 1420, 1427-1436, 1454-1458, 1470, 1473-1475, 1478-1480, 1486, 1490-1491, 1493-1495, 1514, 1518-1519, 1524, 1527, 1530, 1536, 1539, 1542-1543, 1548-1549, 1555-1556, 1561, 1570, 1575, 1584, 1602, 1607, 1609-1615, 1618, 1627-1629, 1637-1638, 1645, 1649-1650, 1668, 1672, 1687, 1690, 1692, 1694-1697, 1708, 1722, 1732, 1734, 1740, 1757, 1796, 1802, 1810, 1817, 1824, 1843, 1849-1850, 1858, 1867, 1869-1870, 1872-1873, 1876, 1891, 1915, 1920, 1925, 1927, 1930, 1935-1936, 1938, 1948-1949, 1951, 1955, 1963-1964, 1969, 1976-1978, 1982-1986, 1988, 1992, 1994-1995, 1999, 2001-2002, 2010-2011, 2031, 2062, 2076, 2080-2082, 2086, 2092, 2104, 2106, 2111-2112, 2114, 2116, 2118, 2124-2125, 2129, 2131-2132, 2135, 2138, 2143-2144, 2149, 2156-2160, 2168-2176, 2179, 2181, 2183, 2185, 2208-2210, 2213, 2216, 2229, 2232, 2240, 2243, 2247, 2253-2256, 2261, 2264, 2266-2267, 2270-2271, 2274, 2277-2279, 2281-2284, 2287-2288, 2290-2291, 2294, 2307-2308, 2310, 2321, 2324, 2326-2328, 2330, 2335, 2337, 2345, 2348, 2354-2355, 2362-2363, 2369, 2380, 2387-2388, 2390-2391, 2399, 2422, 2430-2432, 2437-2438, 2440, 2442, 2446-2447, 2451, 2460-2463, 2465, 2467, 2469, 2477, 2498, 2507, 2509-2513, 2543, 2547-2549, 2551-2554, 2556-2557, 2559-2562, 2564, 2566-2567, 2569, 2573-2574, 2580, 2591-2592, 2595, 2597-2599, 2601-2604, 2606-2609, 2611-2613, 2615-2616, 2620-2621, 2624-2626, 2634, 2640-2643, 2647, 2649-2650, 2660, 2679-2680, 2683-2684, 2688-2689, 2691-2693, 2695, 2697, 2699, 2704, 2706-2707, 2713-2717, 2720, 2722, 2728, 2732-2734, 2739, 2742, 2746-2747, 2750-2751, 2753, 2757-2759, 2761, 2763, 2767-2768, 2775, 2790, 2792-2793, 2795-2796, 2798-2799, 2804-2807, 2812, 2814, 2820, 2822, 2827, 2837, 2840, 2844-2845, 2850-2851, 2855, 2866-2868, 2871, 2879, 2881, 2884, 2898-2900, 2902, 2906, 2908-2909, 2911, 2931-2933, 2935, 2937-2939, 2945-2948, 2951, 2958-2959, 2961-2962, 2970, 2972, 2975-2976, 2981, 2991, 2994-2995, 2998, 3005, 3007, 3010, 3012, 3014, 3024, 3026, 3032, 3034
430E	DDT00223-00224, 226, 228-229, 232-236, 238-239, 241-242, 247, 249, 252-254, 256, 259-267, 270-272, 277, 282-286, 288-289, 291, 295-296, 299, 304, 310-311, 315-316, 318-319, 322, 325-327, 330, 334, 336, 338, 342, 344-349, 352, 355, 357, 363, 365-368, 372-374, 376-377, 379-380, 382-383, 385, 388, 390, 393, 396, 400, 404, 406-407, 409, 415, 417, 419-421, 425-426, 429-431, 434, 436-439, 442, 444-445, 447-448, 450-452, 459, 461-464, 466, 468-469, 471-472, 477-479, 481, 484-487, 490-493, 498-499, 502, 506, 509-511, 514, 519-520, 525-527, 534-535, 538, 543-547, 551-553, 555-557, 560-565, 567-576, 580, 584, 586, 588, 590-592, 598-599, 610-611, 613-617, 621-634, 639-641, 643-650, 654-659, 662, 664-666, 668, 672, 674, 676-677, 679, 684-689, 691, 698, 702, 707, 709-713, 716-717, 719, 721-728, 730, 732, 735, 738-739, 743, 746-752, 754, 758, 760, 762, 764-782, 784-786, 788, 791, 793-794, 796-802, 804-805, 808, 810-811, 813-814, 817, 819, 821, 824-827, 832, 837, 842, 850, 855, 858, 860, 862, 866-867, 869, 873 EAT00234-00236, 248, 263, 271-272, 275-276, 295-296, 298-301, 303, 307, 312, 314-319, 349, 368, 370, 374, 385-386, 388, 392, 400, 403-404, 414, 421-422, 424, 427-428, 441, 449, 452, 454, 458-459, 461, 464, 472, 478-479, 485, 492-494, 498, 502, 506-509, 513, 523, 537, 543, 545, 551, 558, 568, 591, 595, 598, 602-604, 606-608, 610, 612, 616-617, 621, 623, 630, 632, 634, 637, 640, 645-646, 648, 659, 661, 664, 682, 684, 688, 692, 697, 702, 704, 716, 721-722, 732-733, 738-741, 743, 746, 748, 791, 796, 816, 819-820, 824, 826, 828, 836, 838-839, 843, 861-863, 865, 871-873, 875, 884-887, 894, 898-900, 910, 913, 916-917, 919, 921-922, 934, 940-942, 944, 950, 963, 965, 973, 978, 982-983, 986, 991-992, 996, 1006-1007, 1013, 1022, 1034, 1036, 1038, 1040-1042, 1044-1048, 1050-1052, 1061, 1066, 1077, 1080, 1085-1086, 1089-1090, 1098-1099, 1113, 1115, 1127, 1130, 1132, 1134-1136, 1145, 1149-1150, 1163-1167, 1169, 1174, 1180, 1184-1185, 1189, 1207, 1220, 1222, 1253, 1261-1263, 1268, 1276, 1279, 1288-1289, 1293, 1296-1297, 1299, 1301-1302, 1309, 1312, 1321-1323, 1331, 1342, 1373
432E	BXE00188, 260-2060, 2200-4380
434E	FSH00280-00830, 900-1580
442E	GKZ00290-00511, 600-811
444E	LBE00310-00498, 600-783
450E	EBL00150-00270

PARTS NEEDED

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Qty	Part Number	Description
16	1076826	BOLT-12 POINT HD
1	1194740	FILTER AS-HYD
1	1470261	SHAFT AS.
13	2744553	DISC-CLUTCH
2	2949811	PISTON-CLUTCH
2	2949813	SPRING-WAVE
1	6V6640	GASKET SEALER
3	6Y1192	RING-SEAL
13	6Y7929	DISC-FRICTION
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 1% 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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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%
0-2000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
2001-4000 hrs, 25-48 mo	33.3%	50.0%	0.0%	0.0%	50.0%	50.0%

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NOTE: This is a 18.0-hour job

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

Rework Procedure

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If a failure of the #2 or #3 clutch occurs, use the following procedure to repair the transmission.

Refer to RENR6475 Disassembly and Assembly Service Manual for 416E, 420E, 422E, 428E, 430E, 434E, 442E, and 444E Backhoe Loaders Power Train.

1) Remove the transmission from the machine.
2) Disassemble the transmission far enough to remove the 2744582 Main Shaft Group.
3) Disassemble the main shaft group.
4) Inspect the 1470261 Shaft Assembly for cracks around the weld in the bottom of the clutch cylinder. A dye penetrant can be used to check for cracks. See Illustration showing a typical crack.
5) If cracks are not present do Not apply this letter. If cracks are present in the shaft, replace the shaft and assemble the main shaft group using the new parts listed.
6) Install the transmission into the machine.
7) Use the 1076826 Bolts to install the front and rear drive shafts.
8) Install a new 1194740 Filter.
9) Test the transmission for proper operation.