GEAR (25 teeth) 8N8055 - Caterpillar

Removal Procedure
Illustration 1 g02315313
Removal of the Electronic Control Module (ECM) may be necessary in order to remove the atmospheric pressure sensor. If necessary, remove the electronic control module. Refer to Disassembly and Assembly, "Electronic Control Module - Remove and Install" for the correct procedure.
Slide locking tab (2) into the unlocked position. Disconnect harness assembly (1).
Remove atmospheric pressure sensor (3) from the bracket for the ECM. Installation Procedure
Illustration 2 g02315313
Install atmospheric pressure sensor (3) to the bracket for the ECM. Tighten atmospheric pressure sensor (3) to a torque of 10 N m (89 lb in). Note: The atmospheric pressure sensor should not be installed with an O-ring seal.
Connect harness assembly (1) to atmospheric pressure sensor (3). Slide locking tab (2) into the locked position.
If removal of the ECM was necessary, install the ECM. Refer to Disassembly and Assembly, "Electronic Control Module - Remove and Install" for the correct procedure.