Coolant Diverters for the NRS Cooler Are Being Left Out after Servicing C9.3 Tier 4 Interim and Final Engines{108C, 135D} Caterpillar

Articulated Truck:

725C (S/N: LFB1-UP; TFB1-UP)

Industrial Engine:

C9.3 (S/N: C9N1-UP; D9N1-UP; CA91-UP; CP91-UP; CS91-UP)

Excavator:

336E LH (S/N: JEA1-UP; RZA1-UP)

336E (S/N: KED1-UP)

336E L (S/N: YCE1-UP; TEG1-UP; BMH1-UP; FJH1-UP; GTJ1-UP; JRJ1-UP)

336E LNH (S/N: SSL1-UP)

336E L (S/N: YEP1-UP)

336E (S/N: CMR1-UP)

336E H (S/N: HDW1-UP)

336E L (S/N: DPX1-UP; BZY1-UP)

336E LH (S/N: GNY1-UP)

336E LN (S/N: TMZ1-UP)

336F L (S/N: TZA1-UP; RKB1-UP)

336F XE L (S/N: KGH1-UP)

336F L (S/N: LCL1-UP; SSN1-UP)

336F LN (S/N: KFT1-UP)

336F XE L (S/N: DFY1-UP)

336F L (S/N: WTZ1-UP)

568 LL (S/N: BRB1-UP)

568 (S/N: YJX1-UP)

Site Prep Tractor:

2864C (S/N: SP41-UP)

586C (S/N: SP51-UP)

Motor Grader:

12M Series 2 (S/N: F9B1-UP; F9M1-UP; R9P1-UP; R9S1-UP)

12M Series 3 (S/N: N9B1-UP; N9F1-UP; N9P1-UP; N9R1-UP)

140M Series 2 (S/N: M9D1-UP; R9G1-UP; M9J1-UP; R9M1-UP)

140M Series 3 (S/N: N9D1-UP; N9G1-UP; N9J1-UP; N9M1-UP)

160M Series 2 (S/N: M9E1-UP; M9K1-UP; R9L1-UP; R9T1-UP)

160M Series 3 (S/N: N9E1-UP; N9K1-UP; N9L1-UP; N9T1-UP)

Mobile Hydraulic Power Unit:

336E MHPU L (S/N: PCE1-UP; RBS1-UP; DSZ1-UP; T3Z1-UP)

Pipelayer:

PL72 (S/N: P721-UP)

Track-Type Tractor:

D6T LGP VPAT (S/N: KSB1-UP)

D6T LGP (S/N: ZJB1-UP)

D6T XL VPAT (S/N: JZC1-UP; DTD1-UP)

D6T LGP VPAT (S/N: RAD1-UP)

D6T XW VPAT (S/N: STE1-UP)

D6T LGP VPAT (S/N: EJJ1-UP)

D6T XW (S/N: SLJ1-UP)

D6T XL (S/N: GMK1-UP)

D6T XW VPAT (S/N: RRK1-UP)

D6T XL (S/N: MEL1-UP; TSM1-UP)

D6T XW (S/N: WLM1-UP)

D6T XW VPAT (S/N: WRN1-UP)

D6T XL (S/N: KMR1-UP)

D6T LGP (S/N: PLR1-UP)

D6T XL VPAT (S/N: WES1-UP)

D6T LGP (S/N: SGT1-UP; JRW1-UP)

D6T XW VPAT (S/N: RCW1-UP)

D6T XW (S/N: TMY1-UP)

D6T LGP (S/N: HTZ1-UP)

D6T LGP VPAT (S/N: CR31-UP)

D7E (S/N: HKA1-UP)

D7E LGP (S/N: TJA1-UP)

D7E STD (S/N: MDB1-UP)

D7E LGP (S/N: SCG1-UP; SSH1-UP)

D7E (S/N: TAN1-UP; LTW1-UP)

Wheel Loader:

966K (S/N: PBG1-UP; TFS1-UP; NGX1-UP)

966M Series XE (S/N: P6C1-UP)

966M (S/N: DYC1-UP; KJP1-UP)

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

972M Series XE (S/N: EDW1-UP)

972M (S/N: A8P1-UP; JPR1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

The coolant diverter for the NRS cooler is being left out during engine overhaul, short block builds, transmission cooler repairs, and repairs to the NRS cooler water manifold. When the diverter is left out, coolant supply flow will dead head with return flow causing multiple NRS cooler failures and may cause engine failure.

Solution

After the service is done, the coolant diverter will be installed in order to direct coolant supply flow to the NRS cooler.

Illustration 1	g03809989

Illustration 2	g03809996

The coolant diverter can only be installed one way. The diverter has a tab that pilots into the block to ensure the proper orientation.

Illustration 3	g03810200
(1) Diverter

If the C9.3 has an NRS coolant manifold, the diverter (1) is located behind the manifold.

Illustration 4	g03810249

If the C9.3 has a transmission oil cooler, the NRS coolant diverter is located behind the cooler.