2013/10/29 The Clamp Assembly for Muffler Has Been Improved On Certain C Series and D Series Excavators {1062} Caterpillar

Excavator:

345C (S/N: TBA1-UP; FPC1-UP; MDC1-UP; SPC1-UP; ESD1-UP; WDE1-UP; TDG1-UP; GBH1-UP; GPH1-UP; TAJ1-UP; GCL1-UP; S5M1-UP; RFN1-UP; SCN1-UP; DHP1-UP; JAR1-UP; ELS1-UP; LYS1-UP; PJW1-UP; BWY1-UP)

345D (S/N: DPA1-UP; BYC1-UP; HLC1-UP; RGD1-UP; RAE1-UP; YEE1-UP; NEG1-UP; RGG1-UP; EEH1-UP; KFH1-UP; RAJ1-UP; MLK1-UP; NLM1-UP; JKN1-UP; FES1-UP; PBT1-UP; BYW1-UP; LKY1-UP)

349D (S/N: JGB1-UP; WTD1-UP; GKF1-UP; NNF1-UP; PZG1-UP; KLH1-UP; RBJ1-UP; MEN1-UP; KHS1-UP)

365C (S/N: ELC1-UP; MEM1-UP; FEN1-UP; PAR1-UP; MCS1-UP; MCY1-UP)

374D (S/N: PJA1-UP; PAP1-UP; PAS1-UP; PAX1-UP)

385C (S/N: EDA1-UP; MMA1-UP; KGB1-UP; KBC1-UP; SBE1-UP; T2E1-UP; T2F1-UP; KKK1-UP; EAM1-UP; JCM1-UP; MNZ1-UP)

390D (S/N: WAG1-UP; BYP1-UP; WAP1-UP; WBT1-UP; KCZ1-UP)

Mobile Hydraulic Power Unit:

336D MHPU (S/N: L5K1-UP)

345C MHPU (S/N: NRF1-UP; B6N1-UP)

345D MHPU (S/N: P5D1-UP; L5R1-UP)

349D MHPU (S/N: DKN1-UP; MCX1-UP)

365C MHPU (S/N: GSZ1-UP)

374D MHPU (S/N: JNZ1-UP)

385C MHPU (S/N: MSF1-UP)

390D MHPU (S/N: M1M1-UP)

Description of Change: A new clamp is now used on the machines listed. The new clamp has been changed to a more appropriate size clamp in order to secure the muffler pipe assembly and prevent black soot leakage. The new clamp is located between the turbo group and the pipe assembly. Refer to the following illustration for the location of the improved clamp.

Illustration 1	g03496438
New clamp location (1) Pipe assembly (2) New clamp (3) Turbo group

Adaptable To:

Table 1

Parts List
New Part Number	Description	Former Part Number
282-8228	Clamp As	4W-9160

Verify if your machine is equipped with the 4W-9160 Clamp As. In order to know which clamp is equipped on your machine, measure the clamp width. Illustration 2 shows the difference between clamp widths.

Illustration 2	g03496559
Clamp width (4) 4W-9160 Clamp As : 20.5 mm (0.81 inch) (4) 282-8228 Clamp : 25.4 mm (1.00 inch)

If the 4W-9160 Clamp As is loose, replace with a new 282-8228 Clamp. Tighten the 282-8228 Clamp to the torque of 8.3 N·m (6.1 lb ft). Then tap clamp on bottom (opposite bolt), then left side, then right side, and then next to bolt with a soft mallet. Finally, re-torque the clamp to 11 N·m (8.1 lb ft).

Note: If the machine is 385C or 390D, install the new 282-8228 Clamp bolt side to bottom side. Refer to Illustration 3.

Illustration 3	g03496959
385C and 390D clamp installation (2) New clamp