New Bellows (Flexible Tube) for the Exhaust Muffler is Now Available for Certain Excavators {1062} Caterpillar

Excavator

311D (S/N: CLA1-UP; LKA1-UP; PNJ1-UP; DWR1-UP; AKW1-UP; DDW1-UP)

312D (S/N: SKA1-UP; JBC1-UP; FBJ1-UP; XGK1-UP; RHL1-UP; DLP1-UP; KES1-UP; HCW1-UP; TGY1-UP)

312D2 (S/N: KLE1-UP; MGJ1-UP)

313D (S/N: KXD1-UP; LCE1-UP; LBR1-UP)

314D (S/N: BYJ1-UP; MFK1-UP; TXN1-UP; WLN1-UP; PDP1-UP; SBP1-UP; XHR1-UP; SSZ1-UP)

New bellows (flexible tube) for the exhaust muffler is now available for the machines listed above. The new bellows has flexible tube and it prevents the exhaust gas leakage from the engine.

Illustration 1	g06076653

Rework Procedure

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Illustration 2	g06076671
(A) 5I-7848 U-Bolt (B) 239-6659 Muffler (C) 5I-7639 Clamp As (D) 196-8013 Pipe (E) 196-8015 Stud (F) 196-8012 Bracket (G) 5I-7937 Gasket (H) 196-8014 Bracket

1. Remove the two U-Bolts (A), muffler (B), clamp assembly (C), pipe (D), three studs (E), bracket (F), gasket (G), and bracket (H) from the engine. Save the two U-Bolts (A), bracket (F), and bracket (H). Discard all other parts.
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   Illustration 3	g06076704
   (2) 5I-7639 Clamp As (J) 19.0 mm (0.75 inch) (K) 15.0 mm (0.59 inch)

2. Trim clamp assembly (2) to the dimension (J). Make a drill to a diameter of 12.0 mm (0.47 inch) (L) with using the dimension (K).
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   Illustration 4	g06076730
   (M) 10.0 mm (0.39 inch)

3. Trim the muffler (1) to the dimension (M).
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   Illustration 5	g06076770

4. Install both brackets (H) and (F) onto the flywheel housing that were saved in Step 1.

   Note: Ensure the bolt hole distance (N) and (P) between installed brackets (H) and (F), has a measurement of 253.0 mm (9.96 inch). Tighten the four bolts (R) to a torque of 43 ± 5 N·m (32 ± 4 lb ft).

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   Illustration 6	g06077202

5. Install the three new studs (4) and set the new gasket (6) to the turbocharger. Tighten the studs (4) to a torque of 23 ± 2 N·m (204 ± 18 lb in).

6. Install the new bellows assembly (3) to the new muffler (1) which was modified in Step 3. Insert the bellows assembly (3) to the new clamp assembly (2) which was modified in the Step 2 and join them with the muffler as shown in Illustration 1.
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   Illustration 7	g06077268

7. Place the muffler, that was installed in Step 6, in the proper position. Tighten the nuts (5) in the turbocharger side, avoiding any overload to the bellows (3), to a torque of 36 ± 6 N·m (27 ± 4 lb ft).
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   Illustration 8	g06077276

8. Install U-Bolts (A) onto the brackets (F) and (H) that were saved in Step 1.

   Note: Verify the 253.0 mm (9.96 inch) distance between the center blot holes (N) and (P) have been maintained.

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   Illustration 9	g06077286
   (T) 19.5 ± 4.5 mm (0.77 ± 0.18 inch)

9. Tighten the upper nuts (S) to a specified torque of 35 ± 6 N·m (26 ± 4 lb ft) and the bottom nuts (U) to a specified torque of 10 ± 2 N·m (89 ± 18 lb in).

   Note: The length of the U-Bolts under the brackets should be dimension (T).

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   Illustration 10	g06077299

10. Install the clamp assembly (2) that connects the muffler (1) and the bellows (3). Tighten the two bolts (V) to a torque of 64 ± 10 N·m (47 ± 7 lb ft).