A New NOx Reduction System Cooler Group Is Now Used on All C9.3 Tier 4 Interim Machine Engines {108G} Caterpillar

Excavator

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; BZY1-2759; GNY1-131; TMZ1-439)

568 (S/N: BRB1-401; YJX1-150)

Mobile Hydraulic Power Unit

336E MHPU (S/N: G421-1; PCE1-1; RBS1-172; DSZ1-203; T3Z1-256)

Motor Grader

12M Series 2 (S/N: F9B1-220; F9M1-481; R9P1-199; R9S1-360)

140M Series 2 (S/N: M9D1-1844; R9G1-372; M9J1-952; R9M1-559)

160M Series 2 (S/N: M9E1-409; M9K1-425; R9L1-258; R9T1-349)

Site Prep Tractor

2864C (S/N: SP41-114)

586C (S/N: SP51-121)

Track-Type Tractor

D6T (S/N: KSB1-2018; ZJB1-1715; JZC1-309; DTD1-1309; EJJ1-316; SLJ1-1291; GMK1-1667; RRK1-307; TSM1-418; WLM1-307; PLR1-721; JRW1-78001; RCW1-1605)

D7E (S/N: TJA1-1273; TAN1-1393)

Wheel Loader

966K (S/N: PBG1-10001; TFS1-1450)

966K Series XE (S/N: NGX1-441)

972K (S/N: PEM1-947; Z4W1-771)

Wheel Tractor-Scraper

627H (S/N: DBW1-348)

Description Of Change: The NOx Reduction System (NRS) cooler group has a more robust design.

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.

The new 449-3090 Exhaust Cooler Gp (NRS) replaces the former 345-9941 Exhaust Cooler Gp (NRS).

Reference: Disassembly and Assembly, KENR8149, Exhaust Cooler (NRS) - Remove and Install for more information.

Reference: Special Instruction, M0069778, System Check after an NOx Reduction System (NRS) Cooler Failure for C9.3 through C18 Tier 4 Engines for more information.

Reference: Special Instruction, M0070968, Coolant Drain and Vacuum Fill Procedure For Certain C9.3 Through C18 Tier 4 Engines for more information.The required parts are listed in Table 1.

Illustration 1	g06214991