PULLEY 7C2427 - Caterpillar

Perform this maintenance with the engine stopped.
If the crankcase breather is not maintained on a regular basis, it can become plugged. A plugged breather will cause excessive crankcase pressure that may cause crankshaft seal leakage.
Illustration 1 g00588698
(1) Breather assembly
(2) Bolt
(3) Hose clamp
(4) Hose
Loosen hose clamp (3) and remove the hose (4) from breather assembly (1).
Loosen the bolt (2). Remove the breather assembly (1) and the seal.
Wash the breather element in solvent that is clean and nonflammable. Allow the breather element to dry before installation.
Install a breather element that is clean and dry. Install breather assembly (1) and a new seal and install the bolt (2). Tighten the bolt (2) to the following torque: ... 7 2 N m (62 18 lb in)
Install the hose (4). Install hose clamp (3). Refer to the Operation and Maintenance Manual, "Torque Specifications" topic (Maintenance Section) for the proper torques.