Failure of the Connecting Rod Bearings on 3500 and 3600 Engines Due to Delamination {1219, 1225} Caterpillar

Gas Engine

G3508 (S/N: WPN1-UP; DLR1-UP)

G3508B (S/N: RBK1-UP)

G3512 (S/N: WPP1-UP; WPR1-UP)

G3516 (S/N: 4EK1-UP; WPS1-UP; WPT1-UP; WPW1-UP)

G3516B (S/N: JEF1-UP)

G3606 (S/N: 4ZS1-UP)

G3608 (S/N: BEN1-UP)

G3612 (S/N: BKE1-UP)

G3616 (S/N: BLB1-UP)

Gen Set Engine

3508 (S/N: 23Z1-UP; 70Z1-UP)

3508B (S/N: 6PN1-UP)

3508C PETROLEUM (S/N: LLC1-UP)

3512 (S/N: 24Z1-UP; 67Z1-UP)

3512B (S/N: 8RM1-UP; 4AW1-UP)

3516 (S/N: 25Z1-UP; 73Z1-UP)

3516B (S/N: 7RN1-UP)

Gen Set-Military

3516B (S/N: TAK1-UP)

Generator Set

3508 (S/N: PTK1-UP)

3508B (S/N: ZAD1-UP; BGX1-UP)

3512 (S/N: PTG1-UP; PTH1-UP; YAK1-UP; FDR1-UP; 6WW1-UP)

3512 GEN SET (S/N: ZAF1-UP)

3512B (S/N: FDE1-UP; BLF1-UP; PTF1-UP; PTM1-UP; YAM1-UP; YAN1-UP; 6GW1-UP)

3512B GENSET (S/N: ZAH1-UP; ZAJ1-UP)

3512C (S/N: SBG1-UP; RMS1-UP)

3516 (S/N: ZAL1-UP; YAS1-UP; RKT1-UP; 8TW1-UP; GZX1-UP)

3516B (S/N: PBR1-UP; ZAR1-UP; GZT1-UP; YAT1-UP; YAW1-UP; 8NW1-UP; FDX1-UP; GZY1-UP)

3516B GEN SET (S/N: ZAP1-UP)

3516C (S/N: SBJ1-UP)

3516C GEN SET (S/N: SBK1-UP)

G3508 (S/N: CPJ1-UP)

G3512 (S/N: CRN1-UP)

G3512E (S/N: SSR1-UP)

G3516 (S/N: ZBA1-UP)

G3516B (S/N: ZBB1-UP; ZBC1-UP)

G3516C (S/N: GZZ1-UP)

G3520C (S/N: GZA1-UP; GZB1-UP; GZJ1-UP; GZM1-UP; GZN1-UP; RLP1-UP; LGS1-UP)

G3520E (S/N: GZH1-UP)

Industrial Engine

3508 (S/N: 95Y1-UP; 68Z1-UP)

3508B (S/N: BTB1-UP; CBB1-UP; BTR1-UP; 5XS1-UP; BPX1-UP)

3508C PETROLEUM (S/N: LLE1-UP)

3512 (S/N: 49Y1-UP; 65Z1-UP)

3512B (S/N: BRC1-UP; 2AF1-UP; PWG1-UP)

3512C (S/N: LLA1-UP; MLM1-UP)

3512C PETROLEUM (S/N: R1A1-UP; LLF1-UP)

3516 (S/N: 27Z1-UP; 71Z1-UP)

3516B (S/N: KDK1-UP; MSK1-UP; CAN1-UP; KNS1-UP; 7DS1-UP; 6HZ1-UP)

G3520B (S/N: GLF1-UP)

Locomotive Engine

3508B (S/N: 5PS1-UP)

3508C (S/N: F1X1-UP)

3512B (S/N: 3ZW1-UP)

3512C (S/N: F2X1-UP)

3516B (S/N: BCK1-UP)

Marine Auxillary Engine

3508B (S/N: S2A1-UP; S2B1-UP)

3512B (S/N: S2G1-UP; S2H1-UP)

3512C (S/N: SLM1-UP)

3516B (S/N: S2P1-UP; S2R1-UP; S2Z1-UP)

3516C (S/N: JTS1-UP)

Marine Engine

3508B (S/N: S2D1-UP; S2E1-UP)

3508C (S/N: TTA1-UP; TTB1-UP)

3512 (S/N: 50Y1-UP)

3512B (S/N: S2J1-UP; S2K1-UP; S2L1-UP; S2M1-UP; S2N1-UP)

3512C (S/N: TTC1-UP; TTE1-UP; TTF1-UP; TTG1-UP; MKH1-UP; E3W1-UP; E3X1-UP)

3516 (S/N: 72Z1-UP)

3516B (S/N: S2S1-UP; S2T1-UP; S2X1-UP)

3516C (S/N: TTD1-UP; PAG1-UP; TTH1-UP; TTJ1-UP)

Off Highway Truck

785D (S/N: DMC1-UP; MSY1-UP)

793D (S/N: FDB1-UP)

797B (S/N: JSM1-UP)

Petroleum Engine

3512B PETROLEUM (S/N: MHA1-UP)

3516C PETROLEUM (S/N: PES1-UP)

G3520B PETROLEUM (S/N: TPC1-UP)

Power Module

PM3512 (S/N: BNR1-UP)

PM3516 (S/N: BPD1-UP; NAM1-UP; KEN1-UP)

Pumper

SPF343C (S/N: RTX1-UP)

Track-Type Tractor

D11R (S/N: AAF1-UP; 8ZR1-UP; 9TR1-UP; 7PZ1-UP)

Transmission

TH55 - KRESS (S/N: KCH1-UP)

Truck

777C (S/N: 4XJ1-UP)

777D (S/N: AGC1-UP)

785 (S/N: 8GB1-UP)

785C (S/N: APX1-UP)

789 (S/N: 9ZC1-UP)

789B (S/N: 7EK1-UP)

789C (S/N: 2BW1-UP)

Vehicular Engine

3512 (S/N: 51Y1-UP)

Wheel Loader

992G (S/N: ADZ1-UP)

994F (S/N: 4421-UP)

Introduction

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

Problem

Connecting rod bearing failures have occurred in both factory new and dealer rebuilt engines. These failures resulted in connecting rod seizure. The bearing failures have been traced back to a lead-tin overlay delamination large enough that the oil film is disrupted leading to bearing adhesive failure.

The root cause has been identified as interruptions in the electrical current during the plating process. This results in poor lead-tin overlay adhesion and eventual lead-tin overlay de-bonding.

The affected date code range the supplier identified is:

• Plating Year 2008 with plating month codes: UG, UH, UI, UJ, UK and UL

• Plating Year 2009 with plating month codes: UA

Solution

If you have an engine that has suffered a bearing failure, inspect the remaining connecting rods and main bearings in the engine. Also, submit a DSN entry including the following key points in order to expedite processing of your claim:

• Engine or Machine Serial Number

• Bearings Lot Number (formatted as 5#### #### U#)

• Part picture (if possible) or Dealer report

• Engine Hours

• Parts Hours