GUIDE 7X9203 - Caterpillar

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 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 "PS8142" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
This Revised Service Letter replaces the February 10, 1995 (Revised February 1995) Service Letter. Changes have been made to the Service Claim Allowances.
Termination Date
February 28, 1998Problem
The retaining nut and lock that maintains bearing adjustment in the pump drive transfer gear group may loosen on certain 12G and 140G All Wheel Drive (AWD) Motor Graders. Noise and vibration can result at low hours (800-2100) and may repeat.
Affected Product
Model & Identification Number
12G AWD (61M15296, 61M15300, 61M15307, 61M15311, 61M15318, 61M15333, 61M15337, 61M15433)
140G AWD (72V11805, 72V11822, 72V11837, 72V11858, 72V11861, 72V11878, 72V11895, 72V11910, 72V11929, 72V11934, 72V11947, 72V11960, 72V11967, 72V11974, 72V11978, 72V11986, 72V11996, 72V12007, 72V12011, 72V12021, 72V12027, 72V12034, 72V12038, 72V12046, 72V12055, 72V12060, 72V12068, 72V12078, 72V12083, 72V12091, 72V12138, 72V12176, 72V12201, 72V12226, 72V12234, 72V12243, 72V12253, 72V12272, 72V12281, 72V12287, 72V12296, 72V12306, 72V12315, 72V12326, 72V12333, 72V12351, 72V12361, 72V12374, 72V12385, 72V12394, 72V12404, 72V12411, 72V12421, 72V12430, 72V12440, 72V12448, 72V12452, 72V12457, 72V12462, 72V12471, 72V12475, 72V12480, 72V12489, 72V12498, 72V12506, 72V12515, 72V12519, 72V12525, 72V12533, 72V12550, 72V12561, 72V12569, 72V12578, 72V12586, 72V12595, 72V12603, 72V12611, 72V12620, 72V12627, 72V12634, 72V12639, 72V12648, 72V12658, 72V12666, 72V12674, 72V12684, 72V12692, 72V12701, 72V12714, 72V12723, 72V12732, 72V12740, 72V12749, 72V12758, 72V12766, 72V12775, 72V12784, 72V12792, 72V12802, 72V12809, 72V12818, 72V12827, 72V12836, 72V12844, 72V12854, 72V12862, 72V12870, 72V12879, 72V12888, 72V12896, 72V12904, 72V12914, 72V12923, 72V12932, 72V12941, 72V12950, 72V12959, 72V12968, 72V12977, 72V12985, 72V12993, 72V13010, 72V13019, 72V13027, 72V13036, 72V13043, 72V13052, 72V13060, 72V13069, 72V13074, 72V13083, 72V13091, 72V13100, 72V13105, 72V13114, 72V13118, 72V13127, 72V13134, 72V13143, 72V13152, 72V13157, 72V13171, 72V13202, 72V13213, 72V13221, 72V13238, 72V13254, 72V13263, 72V13275, 72V13287, 72V13401, 72V13410, 72V13424, 72V13433, 72V13441, 72V13454, 72V13465, 72V13478, 72V13487, 72V13497, 72V13506, 72V13516, 72V13525, 72V13534, 72V13544, 72V13553, 72V13561, 72V13572, 72V13599, 72V13608, 72V13618, 72V13627, 72V13645, 72V13653, 72V13664, 72V13672, 72V13692, 72V13701, 72V13719, 72V13729, 72V13738, 72V13752, 72V13768, 72V13781, 72V13793, 72V13802, 72V13810, 72V13823, 72V13832, 72V13844, 72V13853, 72V13860, 72V13873, 72V13881, 72V13893, 72V13900, 72V13914, 72V13920, 72V13929, 72V13944, 72V13953, 72V13966, 72V13974, 72V13988, 72V13998, 72V14011, 72V14035, 72V14059, 72V14082, 72V14116, 72V14134, 72V14148, 72V14164, 72V14177, 72V14189, 72V14198, 72V14215, 72V14223, 72V14233, 72V14241, 72V14246, 72V14253, 72V14259, 72V14272, 72V14279, 72V14283, 72V14295, 72V14303, 72V14312, 72V14320, 72V14329, 72V14334, 72V14341, 72V14350, 72V14358, 72V14367, 72V14372, 72V14375, 72V14385, 72V14393, 72V14401, 72V14409, 72V14418, 72V14422, 72V14427, 72V14433, 72V14438, 72V14444, 72V14450, 72V14455, 72V14460, 72V14465, 72V14471, 72V14476, 72V14482, 72V14487, 72V14493, 72V14498, 72V14504, 72V14509, 72V14514, 72V14520, 72V14525, 72V14531, 72V14536, 72V14542, 72V14548, 72V14554, 72V14567, 72V14585, 72V14603, 72V14609, 72V14622, 72V14640, 72V14647, 72V14659, 72V14702, 72V14718, 72V14722, 72V14732, 72V14742, 72V14751, 72V14761, 72V14774, 72V14781, 72V14789, 72V14803, 72V14811, 72V14824, 72V14832, 72V14845, 72V14859, 72V14872, 72V14880, 72V14887, 72V14896, 72V14906, 72V14915,