Improved Rocker Arm Assembly is Now Used on Certain C9.3 Machine Engines {1123} Caterpillar

Improved Rocker Arm Assembly is Now Used on Certain C9.3 Machine Engines {1123}

Usage:

D6T 2B3

Articulated Truck: 725C (S/N: T261-90105; LFB1-235; TFB1-836); 725C2 (S/N: 2T31-689; 2L61-155; TA71-90107)
Cold Planer: PM310 (S/N: KWA1-104; NMA1-107); PM312 (S/N: NJ91-113); PM313 (S/N: JH91-110)
Excavator: 336 (S/N: SP91-151; JHD1-253; YBN1-168; DKS1-198; GDY1-197); 336E (S/N: JEA1-190; RZA1-1060; KED1-375; YCE1-780; TEG1-245; BMH1-204; FJH1-1886; GTJ1-211; JRJ1-517; SSL1-183; YEP1-549; CMR1-440; HDW1-257; DPX1-114; BZY1-2855; GNY1-131; TMZ1-439); 336F (S/N: B391-90203; TZA1-20320; PWB1-1; RKB1-21406; RBC1-10008; YFD1-20030; TJE1-20026; DKF1-10002; WCF1-20008; KGH1-160; YBH1-20011; NAJ1-20018; ZBJ1-10006; LCL1-20009; NBL1-20014; PFL1-20005; SSN1-20205; LTP1-20060; KCS1-20257; NBS1-10008; KFT1-308; DSW1-20010; MTW1-178; DFY1-20052; LJY1-20100; WTZ1-250); 340F (S/N: RBD1-20058; XBD1-20009; YBF1-10008; SGH1-20023; EAR1-10005; WBX1-20008); 345 GC (S/N: KEF1-209)
Forest Machine: 568 (S/N: GF81-237; L681-307; BRB1-401; YJX1-150)
Mobile Hydraulic Power Unit: 336E MHPU (S/N: G421-1; PCE1-1; RBS1-172; DSZ1-203; T3Z1-256); 336FMHPU (S/N: B341-10004; B351-10003; WGF1-90203; KTM1-1)
Motor Grader: 12M Series 2 (S/N: F9B1-220; F9M1-481; R9P1-199; R9S1-360); 12M Series 3 (S/N: N9B1-775; N9F1-1095; N9P1-271; N9R1-345); 140 (S/N: N941-104; N951-156); 140M Series 2 (S/N: M9D1-1844; R9G1-372; M9J1-2399; R9M1-559); 140M Series 3 (S/N: N9D1-1304; N9G1-284; N9J1-970; N9M1-570); 160M Series 2 (S/N: M9E1-409; M9K1-425; R9L1-258; R9T1-349); 160M Series 3 (S/N: N9E1-1000; N9K1-1002; N9L1-195; N9T1-366)
Pipelayer: PL72 (S/N: P721-401; P731-415)
Site Prep Tractor: 2864C (S/N: SP41-118); 586C (S/N: SP51-124)
Track-Type Loader: 973K (S/N: MKL1-329)
Track-Type Tractor: D6 (S/N: GZ91-1; HNK1-1; KEW1-1; KTW1-1); D6 XE (S/N: ES91-1; LNC1-202; LRG1-1; HMH1-1; HZL1-1; HLY1-1); D6T (S/N: 2D21-110; CR31-129; 2B31-247; MB51-341; AK71-109; MH71-957; CG81-109; 7C91-141; SGA1-106; KSB1-2018; ZJB1-1715; JZC1-309; DTD1-1309; RAD1-1038; STE1-130; EJJ1-316; SLJ1-1291; GMK1-1667; RRK1-307; JML1-699; MEL1-243; JNM1-543; TSM1-418; WLM1-307; WRN1-583; K1R1-190; KMR1-639; PLR1-721; WES1-419; HYT1-405; SGT1-553; JRW1-78001; RCW1-1605; NDY1-493; TMY1-385; HTZ1-709; SGZ1-489); D7E (S/N: HKA1-537; TJA1-1273; SSH1-485; TAN1-1393; LTW1-701)
Wheel Loader: 950L (S/N: LXX1-10537); 966K (S/N: PBG1-10001; TFS1-1450); 966K Series XE (S/N: NGX1-441); 966L (S/N: FSL1-10623; FRS1-1575); 966M (S/N: MD71-173; EJA1-2079; DYC1-1388; R8D1-1253; LMM1-10366; KJP1-2978; L8R1-10263; GMS1-217); 966M Series XE (S/N: FL21-1820; P6C1-1137; DZL1-269; B8P1-501; XCR1-1); 972K (S/N: PEM1-947; Z4W1-771); 972L (S/N: RFB1-1134; YJW1-10232); 972M (S/N: A781-212; L8E1-1229; LSJ1-1973; GGN1-10269; WGN1-182; A8P1-1807; JPR1-960; M8W1-10255); 972M Series XE (S/N: AN31-1; L9S1-378; M5S1-366; EDW1-904; R1Z1-279); 980M (S/N: N8T1-925)
Wheel Tractor-Scraper: 627H (S/N: DBW1-348)

Description Of Change: The improved rocker arm assembly is manufactured with new tolerances to provide greater durability.

Adaptable To: The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.

Note: If a rocker arm fails, replace all 12 rocker arms.

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