CASE AS 8R7922 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 352-5891 Lifting Strap 2
B - Loctite 771 - Start By:
Remove the catalyst inlet temperature sensor.
Hot engine components can cause injury from burns. Before performing maintenance on the engine, allow the engine and the components to cool.
Wear goggles, gloves, protective clothing, and a National Institute for Occupational Safety and Health (NIOSH) approved P95 or N95 half-face respirator when handling a used Diesel Particulate Filter or Catalytic Converter Muffler. Failure to do so could result in personal injury.
Illustration 1 g02849252
Loosen clamp assembly (1).
Disconnect clamp assemblies (2).
Use Tooling (A) to remove catalyst (SCR) (3). The weight of catalyst (SCR) (3) is approximately 53 kg (117 lb).
Illustration 2 g03386045
Loosen band clamp (5) and remove bellows assembly (4).
Discard band clamps (1) and (5). 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.
Install catalyst (SCR) (3) in the reverse order of removal.
Illustration 3 g02849250
Typical Example
Note: Do not use power tools in order to torque clamp assemblies (2).
Apply Tooling (B) to the threads of clamp assemblies (2) along Distance (X). Distance (X) is 25 mm (1 inch) above the trunnion. Tighten clamp assemblies (2) to a torque of 16.5 1.5 N m (146 13 lb in).
Illustration 4 g03386044
Cutaway view of band clamps (1) and (5) in position on the assembly.
Note: Do not use power tools in order to torque band clamps (1) and (5).
Verify that the cup of the Ball Joint (G) does not touch the radius of the Ball (F). Position band clamps (1) and (5), hand tighten band clamps (1) and (5). Band clamps (1) and (5) should be in the center of the joint.
Dimension (C) and Dimension (D) should be equal within 2.0 mm (0.08 inch). Repeat the measurements every 90° around band clamps (1) and (5). If necessary, adjust band clamps (1) and (5).
Torque band clamps (1) and (5) to a torque of 35 2 N m (26 1 lb ft).