PL83 and PL87 Pipelayers Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Remove hood.
2. Remove temperature sensor (catalyst inlet).

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Illustration 1	g03469580

1. Loosen clamp (3). Remove bellow assembly (2). Loosen clamp (1).

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Illustration 2	g03841874

2. Install a suitable lifting device to catalyst assembly (4). The weight of catalyst (SCR) (4) is approximately 53 kg (117 lbs). Loosen clamps (5). Remove catalyst (SCR) (4) .

Installation Procedure

Note: When installing a new catalyst or a cleaned catalyst, a SCR reset must be performed. Refer to Special Instruction, REHS8180, "Aftertreatment Filter Maintenance on Tier 4 Final Products Equipped with a Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC), and a Selective Catalyst Reduction (SCR) Filter" for the correct procedure.

1. Install catalyst (SCR) (4) in the reverse order of removal.
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   Illustration 3	g03469777
   Typical Example

   Note: Do not use power tools in order to torque clamp assemblies (5) .

   1. Apply Tooling (B) to the threads of clamp assemblies (5) along Distance (X). Distance (X) is 25 mm (1.0 inch) above the trunnion. Tighten clamp assemblies (5) to a torque of 16.5 ± 1.5 N·m (146 ± 13 lb in).
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   Illustration 4	g03469798
   Cutaway view of band clamp (1) in position on the assembly.

   Note: Do not use power tools in order to torque band clamp (1) .

   2. Verify that the cup of the Ball Joint (G) does not touch the radius of the Ball (F). Position band clamp (1), hand tighten band clamp (1). Band clamp (1) should be in the center of the joint.

   3. Dimension (C) and Dimension (D) should be equal within 2.0 mm (0.08 inch). Repeat the measurements every 90° around band clamp (1). If necessary, adjust band clamp (1) .

   4. Torque band clamp (1) to a torque of 35 ± 2 N·m (26 ± 1 lb ft).