BOLT 3324571 - Caterpillar

Removal Procedure
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.
The muffler, catalytic converter/muffler, and diesel particulate filter will become extremely hot during engine operation. A hot muffler, catalytic converter/muffler and diesel particulate filter can cause serious burns. Allow adequate cooling time before working on or near the muffler, catalytic converter/muffler and diesel particulate filter.
Do not strike any part of the assembly of the Diesel Particulate Filter (DPF). Do not allow any object to contact the internal element of the DPF. If the internal element of the DPF becomes damaged, the assembly must be replaced.
Illustration 1 g03337191
Disconnect harness assemblies (1).
Illustration 2 g03337204
Remove bolts (2) and bolts (3). Disconnect harness assembly (4) from pressure sensor.
Illustration 3 g03337226
Remove bolts (5) from DPF mount bracket.
Illustration 4 g03337243
Use two people to remove diesel particulate filter (6).
Illustration 5 g03337246
Remove temperature sensors (7). Remove pressure sensor (8) and tube assemblies (9). Installation Procedure
Install diesel particulate filter (6) in the reverse order of removal.
Tighten bolts (5) to a torque of 52 3 N m (38 2 lb ft).
Tighten sensors (7) to a torque of 30 4 N m (22 3 lb ft).
Tighten tube assemblies (9) to a torque of 19 3 N m (168 27 lb in).