GEAR-PUMP 7W6528 - Caterpillar

Caterpillar: Confidential Yellow
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.
This Program must be administered as soon as possible. When reporting the repair, use "PI3629" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3629"as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
This Service Letter replaces the terminated Service Letter dated December 31, 1991 - PI3545.
Completion Date
August 31, 1993Termination Date
February 28, 1994Problem
Certain 1991 model year 3176 Truck Engines need to be updated with an inlet air temperature sensor, control module, certification label, boost line, and miscellaneous installation hardware to comply with Federal, California, and Canadian emissions standards.
Affected Product
Model & Identification Number
3176(7LG739, 7LG743, 7LG745, 7LG747, 7LG754, 7LG756, 7LG757, 7LG759, 7LG761, 7LG762, 7LG765, 7LG767, 7LG773, 7LG774, 7LG778-780, 7LG790, 7LG792, 7LG797, 7LG799-800, 7LG803, 7LG810, 7LG811, 7LG813, 7LG817, 7LG820, 7LG823, 7LG828, 7LG832, 7LG837, 7LG842, 7LG844, 7LG847, 7LG852-854, 7LG859, 7LG872, 7LG875, 7LG878, 7LG879, 7LG883-886, 7LG888, 7LG895, 7LG896, 7LG903, 7LG910, 7LG911, 7LG913, 7LG917-922, 7LG926, 7LG930-932, 7LG934-937, 7LG943-945, 7LG948-950, 7LG959, 7LG964, 7LG965, 7LG974, 7LG975, 7LG978, 7LG982, 7LG983, 7LG986, 7LG987, 7LG993, 7LG995, 7LG999, 7LG1004, 7LG1006, 7LG1015, 7LG1026, 7LG1036, 7LG1057, 7LG1059, 7LG1060, 7LG1062, 7LG1065, 7LG1067, 7LG1072, 7LG1088, 7LG1089, 7LG1093, 7LG1095-1097, 7LG1104, 7LG1115-1117, 7LG1120, 7LG1121, 7LG1124, 7LG1125, 7LG1127, 7LG1133, 7LG1136, 7LG1143-1148, 7LG1154, 7LG1156, 7LG1160, 7LG1166, 7LG1171, 7LG1177, 7LG1178, 7LG1180, 7LG1183-1186, 7LG1189, 7LG1191, 7LG1196-1198, 7LG1205, 7LG1212, 7LG1213, 7LG1216, 7LG1224, 7LG1229, 7LG1232, 7LG1240, 7LG1243, 7LG1244, 7LG1253, 7LG1256-1258, 7LG1261, 7LG1262, 7LG1264, 7LG1268, 7LG1271, 7LG1278, 7LG1280, 7LG1281, 7LG1282, 7LG1286, 7LG1295, 7LG1302, 7LG1304, 7LG1308, 7LG1311, 7LG1315, 7LG1328, 7LG1333, 7LG1337, 7LG1345, 7LG1350, 7LG1352, 7LG1354, 7LG1359, 7LG1377, 7LG1378, 7LG1380, 7LG1381, 7LG1384, 7LG1386, 7LG1389-1392, 7LG1396, 7LG1399, 7LG1400, 7LG1402, 7LG1403, 7LG1405, 7LG1406, 7LG1409, 7LG1417, 7LG1419, 7LG1423, 7LG1457, 7LG1463, 7LG1482, 7LG1488, 7LG1490, 7LG1494, 7LG1496, 7LG1499, 7LG1505, 7LG1508, 7LG1513, 7LG1520, 7LG1521, 7LG1528, 7LG1529, 7LG1538, 7LG1541, 7LG1545, 7LG1546, 7LG1548, 7LG1555, 7LG1574-1576, 7LG1579, 7LG1584, 7LG1587, 7LG1590, 7LG1592, 7LG1593, 7LG1595, 7LG1600, 7LG1601, 7LG1609, 7LG1610, 7LG1612-1614, 7LG1616-1618, 7LG1624, 7LG1630, 7LG1633, 7LG1635, 7LG1656, 7LG1657, 7LG1665-1668, 7LG1680, 7LG1684, 7LG1686, 7LG1691, 7LG1694, 7LG1698, 7LG1707, 7LG1710, 7LG1714, 7LG1719, 7LG1723, 7LG1725, 7LG1732, 7LG1740, 7LG1748, 7LG1753, 7LG1795, 7LG1798, 7LG1799, 7LG1804, 7LG1813, 7LG1815, 7LG1831, 7LG1837, 7LG1840, 7LG1863, 7LG1873, 7LG1879, 7LG1885-1887, 7LG1900, 7LG1905, 7LG1911, 7LG1912, 7LG1918, 7LG1924, 7LG1925, 7LG1927, 7LG1930, 7LG1933, 7LG1936, 7LG1939, 7LG1940, 7LG1942, 7LG1944, 7LG1947, 7LG1950, 7LG1952-1956, 7LG1969, 7LG1970, 7LG1973, 7LG1978, 7LG1980, 7LG1983, 7LG1985, 7LG1988, 7LG1996, 7LG2008, 7LG2017, 7LG2020, 7LG2022, 7LG2025, 7LG2052, 7LG2053-2056, 7LG2058, 7LG2068, 7LG2069, 7LG2077, 7LG2079, 7LG2080, 7LG2084, 7LG2095, 7LG2096, 7LG2098, 7LG2101, 7LG2107, 7LG2108, 7LG2129, 7LG2132, 7LG2156, 7LG2160, 7LG2167, 7LG2188, 7LG2195, 7LG2199, 7LG2211, 7LG2215, 7LG2218, 7LG2229, 7LG2232, 7LG2246, 7LG2252, 7LG2253, 7LG2257, 7LG2258, 7LG2296, 7LG2299, 7LG2301, 7LG2305, 7LG2365, 7LG2382, 7LG2677, 7LG2747, 7LG2786, 7LG2796, 7LG2799, 7LG2801, 7LG2805, 7LG3307, 7LG3316, 7LG3319, 7LG3328)
Parts Needed
Dealers will need to order parts for this Program.
All parts are common between engine models except the 6I1527, 6I1528,