91401-ZY3-A00 Honda TUBE A, BREATHER (Honda Code 8009235).

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PSP FOR DAMAGED BOLTS IN GOVERNOR FLYWEIGHT CARRIER AND AUTO TIMING ADVANCE UNITS IN D8N, 621E, 623E, 627E, 824C TRACTORS; 980 C LOADERS; 245 EXCAVATORS; 16G MOTOR GRADERS; 825C, 826C COMPACTORS; 3406 INDUSTRIAL, MARINE, GEN SET, TRUCK ENGINES - MAILED US AND CANADA, CACO, CFEL, COSA
  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-87 A-39 AU-56 E-37 O-50 1264, 1272 PS4224 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4224" as Part Number and "7755" as Group Number. Although products are to be administered as described above, parts stock should be purged immediately. Termination Date
May 31, 1989
Problem
Some 1S5440 Dowels were made with a chamfer on the ends instead of a radius. These dowels are used in certain governor groups and automatic timing advance units. The chamfered dowels may damage the threads of the bolts in the governor flyweight retainer and in the automatic timing advance units.
Affected Product
Model Identification Number Automatic Timing Advance Units Only 3406B 7FB86679 - 95381 2WB4651 - 4919 4TB1106 - 1216 6TB3856 - 4072 621E 6AB810-839, 846 623E 6CB654, 656-679 627E 6EB504, 505 627E 6GB574, 577, 590, 591 245 82X748-752, 754-773, 776, 785, 792 245 84X1061, 1065-1069, 1071-1074, 1083-1085, 1100, 1116, 1118, 1130, 1131, 1133 824C 85X1251-1262 825C 86X771-773 826C 87X687, 688, 690, 692-694, 696-715 980C 63X7398, 7402-7473, 7475-7570, 7573-7576, 7578, 7580, 7583, 7584, 7586, 7630 2XD466, 467, 469, 470, 474-485, 487, 489-494, 496-499, 501, 502, 504-507, 509, 510, 513-515, 518, 519, 521-550, 552-559, 561, 578, 583, 585, 596, 597, 633, 634, 673, 699, D8N 9TC814, 833, 959, 960, 962-964, 966, 969, 973, 975-986, 988-999, 1001-1049, 1051-1086, 1088-1114, 1116-1155, 1157-1215, 1217, 1218, 1222, 1223, 1267, 1286, 1297, 1298, 1346, 1429, 1603, 1801 16G 93U2685-2705, 2730 Automatic Timing Advance Units And Governors 3406B 7FB95382 - 99999 4MG1 - 3599 2WB4920 - 5353 4TB1217 - 1399 6TB4073 - 4467 621E 6AB840, 841-845, 847-916, 926, 929, 931-933, 935 623E 6CB680 - 697, 699-707, 714, 717 627E 6EB508, 509, 514 6GB93, 594 980C 63X7571, 7572, 7577, 7579, 7581, 7582, 7585, 7587-7629, 7631-7761, 7765-7792, 7794-7874, 7898 2XD562, 570-577, 580-582, 584, 586-595, 598-600, 602, 604-606, 609-612, 614-632, 635-642, 644-650, 652, 653, 656-660, 662-665, 667, 668, 670, 678-680, 683, 686, 697, 700 13B787 245 82X774, 775, 777-784, 786-790, 793-820, 823, 831, 832, 835 84X1075, 1077, 1079-1082, 1086-1099, 1101, 1102, 1105-1115, 1117, 1120-1123, 1128, 1134 824C 85X1263 -1285 825C 86X774 - 783 826C 87X716 - 736, 738-779 D8N 9TC1216, 1219-1221, 1224-1266, 1269-1285, 1287-1296, 1299-1345, 1347-1599, 1601, 1602, 1604-1655, 1657-1682, 1684, 1685, 1719, 1728, 1737, 1749, 1755, 1760, 1888, 1892 16G 93U2706 -2743, 2747, 2749-2754 Governors Only 3406B 4MG3600 - 10013
Parts Needed
Parts Stock To rework the following: 2W6179 Pump Group 1N3110 Governor Group 2W7325 Governor Group